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19-1325; Rev 0; 1/98
Low-Voltage, Phase-Reversal Analog Switch
________________General Description
The MAX4528 low-voltage, CMOS analog IC is configured as a phase-reversal switch and optimized for highspeed applications such as chopper amplifiers. It operates from a +2.7V to +12V single supply or from 2.7V to 6V dual supplies. On-resistance (110 max) is matched between switches to 7 (max). Each switch can handle Rail-to-Rail(R) analog signals. The leakage current is only 0.5nA at +25C and 20nA at +85C. All digital inputs have 0.8V to 2.4V logic thresholds, ensuring both TTL- and CMOS-logic compatibility. For higher voltage operation, see the MAX4526/ MAX4527 data sheet.
____________________________Features
o 5pC (max) Charge Injection o 110 Signal Paths with 5V Supplies o Rail-to-Rail Signal Handling o Transition Time <100ns with 5V Supplies o 1.0A (max) Current Consumption o >2kV ESD Protection per Method 3015.7 o TTL/CMOS-Compatible Input o Small Packages: 8-Pin SO, DIP, and MAX
MAX4528
________________________Applications
Chopper-Stabilized Amplifiers Balanced Modulators/Demodulators Data Acquisition Test Equipment Audio-Signal Routing
_______________Ordering Information
PART MAX4528CPA MAX4528CSA MAX4528CUA MAX4528C/D MAX4528EPA MAX4528ESA MAX4528EUA TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C PIN-PACKAGE 8 Plastic DIP 8 SO 8 MAX Dice* 8 Plastic DIP 8 SO 8 MAX
*Contact factory for availability.
_________________________Pin Configuration/Functional Diagram/Truth Table
TOP VIEW
MAX4528
A1 B2 GND 3 IN 4 8 7 6 5 V+ X Y VIN O 1 TRUTH TABLE A B Y X X Y
DIP/SO/MAX
SWITCH POSITIONS SHOWN WITH IN = LOW
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468.
Low-Voltage, Phase-Reversal Analog Switch MAX4528
ABSOLUTE MAXIMUM RATINGS
(Voltages Referenced to GND) V+ .............................................................................-0.3V to 13V V-...............................................................................-13V to 0.3V V+ to V- .....................................................................-0.3V to 13V All Other Pins (Note 1) ..........................(V- - 0.3V) to (V+ + 0.3V) Continuous Current into Any Terminal..............................20mA Peak Current into Any Terminal (pulsed at 1ms, 10% duty cycle)...................................50mA ESD per Method 3015.7 ..................................................>2000V Continuous Power Dissipation (TA = +70C) (Note 2) Plastic DIP (derate 9.09mW/C above +70C) ............727mW SO (derate 5.88mW/C above +70C) .........................471mW MAX (derate 4.10mW/C above +70C) ....................330mW Operating Temperature Ranges MAX4528C_ _ .....................................................0C to +70C MAX4528E_ _ ..................................................-40C to +85C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C
Note 1: Signals on IN, A, B, X, or Y exceeding V+ or V- are clamped by internal diodes. Limit forward-diode current to maximum current rating. Note 2: All leads are soldered or welded to PC boards.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS: 5V Dual Supplies
(V+ = 5V, V- = -5V, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER ANALOG SWITCH Analog-Signal Range A-X, A-Y, B-X, B-Y On-Resistance A-X, A-Y, B-X, B-Y On-Resistance Match (Note 5) A-X, A-Y, B-X, B-Y On-Resistance Flatness (Note 6) A-B, X-Y Leakage Current (Note 7) LOGIC INPUT IN Input Logic Threshold High IN Input Logic Threshold Low IN Input Current Logic High or Low VINH VINL IINH, IINL VIN_ = 0.8V or 2.4V C, E C, E C, E 0.8 -1 1.6 1.6 0.03 1 2.4 V V A VA, VB, VX, VY RON RON RFLAT(ON) IA, IB, IX, IY (Note 4) VA = VB = 3V, IA = IB = 1mA VA = VB = 3V, IA = IB = 1mA VA = VB = 3V, 0V, -3V; IA = IB = 1mA V+ = 5.5V; V- = -5.5V; VIN = 0V, 3V; - VA = 4.5V; VB = +4.5V C, E +25C C, E +25C C, E +25C C, E +25C C, E -0.5 -20 0.01 9 3 V70 V+ 110 130 7 9 15 17 0.5 20 V nA SYMBOL CONDITIONS TA MIN TYP (Note 3) MAX UNITS
SWITCH DYNAMIC CHARACTERISTICS Transition Time Break-Before-Make Time Delay Charge Injection (Note 4) A-X, A-Y, B-X, B-Y Capacitance A-X, A-Y, B-X, B-Y Isolation (Note 8) tTRANS tBBM Q CON VISO VA = VB = 3V, V+ = 5V, V- = -5V, RL = 300, Figure 3 VA = VB = 3V, V+ = 5V, V- = -5V, RL = 300, Figure 4 CL = 1.0nF, VA or VB = 0V, Figure 5 VA = VB = GND, f = 1MHz, Figure 6 RL = 50, CL = 15pF, f = 1MHz, VA = VB = 1VRMS, Figure 7 +25C C, E +25C C, E +25C +25C +25C 1 13 -68 5 1 20 70 100 125 ns ns pC pF dB
2
_______________________________________________________________________________________
Low-Voltage, Phase-Reversal Analog Switch
ELECTRICAL CHARACTERISTICS: 5V Dual Supplies (continued)
(V+ = 5V, V- = -5V, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER POWER SUPPLY Power-Supply Range V+ Supply Current V- Supply Current V+, VI+ IVIN = 0V or V+ VIN = 0V or V+ C, E +25C C, E +25C C, E 2.7 -1 -10 -1 -10 6 1 10 1 10 V A A SYMBOL CONDITIONS TA MIN TYP (Note 3) MAX UNITS
MAX4528
ELECTRICAL CHARACTERISTICS: +5V Single Supply
(V+ = 5V, V- = 0V, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER ANALOG SWITCH Analog-Signal Range A-X, A-Y, B-X, B-Y On-Resistance A-X, A-Y, B-X, B-Y On-Resistance Match (Note 5) A-B, X-Y Leakage Current (Note 9) LOGIC INPUT IN Input Logic Threshold High IN Input Logic Threshold Low IN Input Current Logic High or Low VINH VINL IINH, IINL VIN_ = 0.8V or 2.4V C, E C, E C, E 0.8 -1 1.6 1.6 0.03 1 2.4 V V A VA, VB, VX, VY RON RON IA, IB, IX, IY (Note 4) VA = VB = 3V, IA = IB = 1mA VA = VB = 3V, IA = IB = 1mA V+ = 5.5V; VIN = 0V, 3V; VA = 4.5V, 1V; VB = 1V, 4.5V C, E +25C C, E +25C C, E +25C C, E -0.5 -20 0.01 5 V120 V+ 175 200 10 12 0.5 20 V nA SYMBOL CONDITIONS TA MIN TYP (Note 3) MAX UNITS
SWITCH DYNAMIC CHARACTERISTICS (Note 4) Transition Time Break-Before-Make Time Delay Charge Injection A-X, A-Y, B-X, B-Y Capacitance A-X, A-Y, B-X, B-Y Isolation (Note 8) POWER SUPPLY Power-Supply Range V+ Supply Current V+ I+ VIN = 0V or V+ C, E +25C C, E 2.7 -1 -10 12 1 10 V A tTRANS tBBM Q COFF VISO VA = VB = 3V, V+ = 5V, RL = 300, Figure 3 VA = VB = 3V, V+ = 5V, RL = 300, Figure 4 CL = 1.0nF, VA or VB = 0V, Figure 5 VA = VB = GND, f = 1MHz, Figure 6 RL = 50, CL = 15pF, f = 1MHz, VA = VB = 1VRMS, Figure 7 +25C C, E +25C C, E +25C +25C +25C 1.5 17 -70 5 1 20 110 175 200 ns ns pC pF dB
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3
Low-Voltage, Phase-Reversal Analog Switch MAX4528
ELECTRICAL CHARACTERISTICS: +3V Single Supply
(V+ = 2.7V to 3.6V, V- = 0V, V INH = 2.4V, V INL = 0.6V, T A = T MIN to T MAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER ANALOG SWITCH Analog-Signal Range A-X, A-Y, B-X, B-Y On-Resistance LOGIC INPUT IN Input Logic Threshold High IN Input Logic Threshold Low IN Input Current Logic High or Low VINH VINL IINH, IINL V+ = 3V V+ = 3V VIN_ = 0V or V+ C, E C, E C, E 0.6 -1 0.9 0.9 0.03 1 2.4 V V A VA, VB, VX, VY RON (Note 4) V+ = 3V, VA = VB = 1.5V, IA = IB = 0.1mA C, E +25C C, E V250 V+ 900 1000 V SYMBOL CONDITIONS TA MIN TYP (Note 3) MAX UNITS
SWITCH DYNAMIC CHARACTERISTICS (Note 4) Transition Time Break-Before-Make Time Delay Charge Injection POWER SUPPLY Power-Supply Range V+ Supply Current V+, VI+ VIN = 0V or V+ C, E +25C C, E 2.7 -1 -10 12 1 10 V A tTRANS tBBM Q VA = 1.5V, VB = 0V, V+ = 3V, V- = 0V, RL = 1k, Figure 3 VA = 1.5V, VB = 0V, V+ = 3V, V- = 0V, RL = 1k, Figure 4 CL = 1.0nF, VA or VB = 0V, Figure 5 +25C C, E +25C C, E +25C 1 5 2 150 150 400 500 ns ns pC
The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Guaranteed by design. RON = RON(MAX) - RON(MIN). Resistance flatness is defined as the difference between the maximum and the minimum value of on-resistance as measured over the specified analog-signal range. Note 7: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at +25C. Note 8: Off isolation = 20log10 [(VX or VY) / (VA or VB)], VA or VB = output, VA or VB = input to off switch. Note 9: Leakage testing for single-supply operation guaranteed by testing with dual supplies. Note 3: Note 4: Note 5: Note 6:
4
_______________________________________________________________________________________
Low-Voltage, Phase-Reversal Analog Switch
__________________________________________Typical Operating Characteristics
(V+ = 5V, V- = -5V, GND = 0V, TA = +25C, unless otherwise noted.)
ON-RESISTANCE vs. VA, VB (DUAL SUPPLIES)
MAX4528-01
MAX4528
ON-RESISTANCE vs. VA, VB, AND TEMPERATURE (DUAL SUPPLIES)
MAX4528-02
ON-RESISTANCE vs. VA, VB (SINGLE SUPPLY)
V+ = 2V V+ = 2.7V V+ = 3.3V V+ = 5V 100 V+ = 7.5V V- = 0V
MAX4528-03
1000 V+ = 2.7V V- = -2.7V RON () V+ = 1.2V V- = -1.2V V+ = 2V V- = -2V 100 V+ = 3.3V V- = -3.3V V+ = 5V V- = -5V
140 120 100 RON () 80 60 40 20 TA = -40C TA = +25C TA = -55C TA = +125C TA = +85C
1000
TA = +70C
RON ()
V+ = 10V
10 -5 -4 -3 -2 -1 0 1 2 3 4 5 VA, VB (V)
0 -5 -4 -3 -2 -1 0 1 2 3 4 5 VA, VB (V)
10 0 1 2 3 4 5 6 7 8 9 10 VA, VB (V)
ON-RESISTANCE vs. VA, VB, AND TEMPERATURE (SINGLE SUPPLY)
MAX4528-04
LEAKAGE vs. TEMPERATURE
MAX4528-05
CHARGE INJECTION, CHARGEINJECTION MATCHING vs. VA, VB
5 0 Q (pC) -5 -10 -15 -20 -25 V+ = 5V V- = 5V -5 -4 -3 -2 -1 0 1 QX QY Q MATCHING
MAX4528-06
200 180 160 140 RON () 120 100 80 60 40 20 0 0
TA = +125C
10,000 1000 100 LEAKAGE (pA) 10 1 0.1 0.01 0.001
10
TA = +70C
TA = +85C
TA = +25C TA = -40C V+ = 5V V- = 0V 1 2 3 4 5 TA = -55C
-55
-25
5
35
65
95
125
2
3
4
5
VA, VB (V)
TEMPERATURE (C)
VA, VB (V)
CHARGE INJECTION, CHARGEINJECTION MATCHING vs. VA, VB (+5V SUPPLY)
MAX4528-07
CHARGE INJECTION, CHARGEINJECTION MATCHING vs. VA, VB (+3V SUPPLY)
MAX4528-08
TRANSITION TIME vs. SUPPLY VOLTAGE
MAX4528-09
4 Q MATCHING 2 0 Q (pC)
4 3 2 Q (pC) 1 0 QY V+ = 3V V- = 0V
250
200 QX QX
-2 -4 -6 -8 -10 0 1 2 3 V+ = 5V V- = 0V QY
tTRANS (ns)
150 SINGLE SUPPLY 100
-1 -2 -3 4 5 0 1 2 3 4 5 Q MATCHING 50 DUAL SUPPLIES 0 2 4 VA, VB (V) 6 8 SUPPLY VOLTAGE (V) 10
VA, VB (V)
_______________________________________________________________________________________
5
Low-Voltage, Phase-Reversal Analog Switch MAX4528
_________________________________Typical Operating Characteristics (continued)
(V+ = 5V, V- = -5V, GND = 0V, TA = +25C, unless otherwise noted.)
TRANSITION TIME vs. TEMPERATURE
MAX4528-10
SUPPLY CURRENT AND GROUND CURRENT vs. INPUT VOLTAGE
10-1 10-2 10-3 I+, IGND (A) V+ = 12V LOSS (dB) 10-4 10-5 10-6 10-7 10-8 10-9 V+ = 5V V- = 0V
MAX4528-11
FREQUENCY RESPONSE
0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 V+ = 5V V- = -5V 50 IN AND OUT 0.1 1 10 FREQUENCY (MHz) 100 1000 ON PHASE ON LOSS OFF ISOLATION
MAX4528-12
250 +2.7V SINGLE SUPPLY
1
180 150 120 90 30 0 -30 -60 -90 -120 -150 -180 PHASE (DEGREES) 60
200
tTRANS (ns)
150 +5V SINGLE SUPPLY 100
50 5V DUAL SUPPLIES 0 -55 -25 5 35 65 TEMPERATURE (C) 95 125
10-10 10-11 01 2 3 4 5 7 VIN (V) 6 8 9 10 11 12
TOTAL HARMONIC DISTORTION vs. FREQUENCY
MAX4526/27 TOC-13
LOGIC-LEVEL THRESHOLD vs. SUPPLY VOLTAGE
MAX4528-14
100 V+ = 5V V- = -5V 600 IN AND OUT 10 THD (%)
3.0 2.5 2.0 1.5 1.0 0.5
1
0.1
LOGIC-LEVEL THRESHOLD (V)
0.01 10 100 1k FREQUENCY (Hz) 10k 20k
0 01 2 3 45 67 V+ (V) 8 9 10 11 12
6
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Low-Voltage, Phase-Reversal Analog Switch
_____________________Pin Description
PIN 1 NAME A FUNCTION Analog-Switch Input Terminal A. Connected to Y when IN is low; connected to X when IN is high. Analog-Switch Input Terminal B. Connected to X when IN is low; connected to Y when IN is high. Ground. Connect GND to digital ground. (Analog signals have no ground reference; they are limited to V+ and V-.) Logic-Level Control Inputs (see Truth Table) Negative Analog Supply-Voltage Input. Connect V- to GND for singlesupply operation. Analog-Switch Output Terminal Y Analog-Switch Output Terminal X Positive Analog/Digital Supply-Voltage Input. Internally connected to substrate.
both DC and AC symmetry are optimized with a small 8-pin configuration that allows simple board layout and isolation of logic signals from analog signals.
MAX4528
Power-Supply Considerations
Overview The MAX4528's construction is typical of most CMOS analog switches. It has three supply pins: V+, V-, and GND. V+ and V- drive the internal CMOS switches and set the analog-voltage limits on any switch. Reverse ESD-protection diodes are internally connected between each analog-signal pin and both V+ and V-. One of these diodes conducts if any analog signal exceeds V+ or V-. Virtually all of the analog leakage current is through the ESD diodes to V+ or V-. Although the ESD diodes on a given signal pin are identical and therefore fairly well balanced, they are reverse biased differently. Each is biased by either V+ or V- and the analog signal. This means their leakages vary as the signal varies. The difference in the two diode leakages from the signal path to the V+ and V- pins constitutes the analog-signal-path leakage current. All analog leakage current flows to the supply terminals, not to the other switch terminal. This explains how both sides of a given switch can show leakage currents of either the same or opposite polarity. There is no connection between the analog-signal paths and GND. The analog-signal paths consist of an N-channel and P-channel MOSFET with their sources and drains paralleled and their gates driven out-ofphase to V+ and V- by the logic-level translators. V+ and GND power the internal logic and logic-level translator and set the input logic threshold. The logiclevel translator converts the logic levels to switched V+ and V- signals to drive the analog switches' gates. This drive signal is the only connection between GND and the analog supplies. V+ and V- have ESD-protection diodes to GND. The logic-level input has ESD protection to V+ and V-, but not to GND, so the logic signal can go below GND (as low as V-) when bipolar supplies are used. Increasing V- has no effect on the logic-level thresholds, but it does increase the drive to the internal P-channel switches, reducing overall switch on-resistance. V- also sets the negative limit of the analog-signal voltage. The logic-level input pin (IN) has ESD-protection diodes to V+ and V- but not to GND, so it can be safely driven to V+ and V-. The logic-level threshold (VIN) is CMOS/ TTL compatible when V+ is between 4.5V and 12V (see Typical Operating Characteristics).
2
B
3
GND
4
IN
5 6 7 8
VY X V+
Note: Pins A, B, X, and Y are identical and interchangeable. Any may be considered as an input or output; signals pass equally well in either direction. However, AC symmetry is best when A and B are the inputs and X and Y are the outputs. Reduce AC balance in critical applications by using A and X or A and Y as the input, and B and X or B and Y as the output.
_______________Detailed Description
The MAX4528 is a phase-reversal analog switch consisting of two normally open and two normally closed CMOS analog switches arranged in a bridge configuration. Analog signals are put into two input pins and taken out of two output pins. A logic-level signal controls whether the input signal is routed through normally or inverted. A low-resistance DC path goes from inputs to outputs at all times, yet isolation between the two signal paths is excellent. Analog signals range from V- to V+. These parts are characterized and optimized with 5V supplies, and can operate from a single supply. The MAX4528 is designed for DC and low-frequencysignal phase-reversal applications, such as chopper amplifiers, modulator/demodulators, and self-zeroing or self-calibrating circuits. Unlike conventional CMOS switches externally wired in a bridge configuration,
_______________________________________________________________________________________
7
Low-Voltage, Phase-Reversal Analog Switch MAX4528
Bipolar Supplies The MAX4528 operates with bipolar supplies between 2.7V and 6.0V. The V+ and V- supplies need not be symmetrical, but their sum cannot exceed the 13V absolute maximum rating (see Absolute Maximum Ratings). Single Supply The MAX4528 operates from a single +2.7V to +12V supply when V- is connected to GND. Observe all of the bipolar precautions when operating from a single supply.
Balanced Modulator/Demodulator
The MAX4528 can be used as a balanced modulator/ demodulator at carrier frequencies up to 100kHz (Figure 2). Higher frequencies are possible, but as frequency increases, small imbalances in the MAX4528's internal capacitance and resistance gradually impair performance. Similarly, imbalances in external circuit capacitance and resistance to GND reduce overall carrier suppression. The carrier is applied as a logic-level square wave to IN. (Note that this voltage can go as negative as V-.) For best carrier suppression, the power-supply voltages should be equal, the square wave should have a precise 50% duty cycle, and both the input and output signals should be symmetrical around ground. Bypass V+ and V- to GND with 0.1F ceramic capacitors, as close to the IC pins as possible. In critical applications, carrier suppression can be optimized by trimming duty cycle, DC bias around GND, or external source and load capacitance. In signal lines, balancing both capacitance and resistance to GND produces the best carrier suppression. Transformer coupling of input and output signals provides the best isolation and carrier suppression. Transformers can also provide signal filtering, impedance matching, or low-noise voltage gain. Use a center-tapped transformer or high-resistance voltage divider to provide a DC path to GND on either the input or output signal. This ensures a DC path to GND and symmetrical operation of the internal switches.
__________Applications Information
The MAX4528 is designed for DC and low-frequencysignal phase-reversal applications. Both DC and AC symmetry are optimized for use with 5V supplies.
Signal Phase/Polarity Reversal
The MAX4528 can reverse the phase or polarity of a pair of signals that are out-of-phase and balanced to ground. This is done by routing signals through the MAX4528 and, under control of IN, reversing the two signals paths inside the switch before sending out to a balanced output. Figure 1 shows a typical example. The MAX4528 cannot reverse the phase or polarity of a single grounded signal, as can be done with an inverting op amp or transformer.
V+
V+
MAX4528
A INPUTS B V+ X Y LOGIC LOW IN GND VOUTPUTS IN GND VVINPUTS A B V+ X Y LOGIC HIGH
MAX4528
OUTPUTS
V-
TRUTH TABLE IN A B O Y X 1 X Y
Figure 1. Typical Application Circuits
8 _______________________________________________________________________________________
Low-Voltage, Phase-Reversal Analog Switch MAX4528
TIME WAVEFORMS
LOGIC (CARRIER)
OUTPUT SPECTRUM
A MODULATOR/DEMODULATOR CIRCUIT V+ B NPUT V+ A X OUTPUT
LOWER SIDEBAND
UPPER SIDEBAND SUPPRESSED CARRIER
B IN LOGIC (CARRIER)
Y GND V-
X AMPLITUDE
MAX4528
VY FREQUENCY
X-Y (OUTPUT)
Figure 2. Balanced Modulator/Demodulator
______________________________________________Test Circuits/Timing Diagrams
V+ VIN IN 50 V+ V+ A B X GND VVVA tTRANS V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION. tTRANS 300 +3V -3V VOUT 35pF VOUT 0V 90% VB 90% VIN 0V 50%
MAX4528
Figure 3. Address Transition Time
_______________________________________________________________________________________ 9
Low-Voltage, Phase-Reversal Analog Switch MAX4528
_________________________________Test Circuits/Timing Diagrams (continued)
V+ VIN IN 50 V+ VIN A B X OR Y GND VV300 VOUT 35pF +3V
V+ 50% 0V
t F < 5ns t R < 5ns
MAX4528
VOUT 90%
0V tBBM
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 4. Break-Before-Make Interval
V+ V+ B OR A A OR B N.C. VA OR VB VIN 0V V+
MAX4528
VIN 50 IN GND X OR Y VVVOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION. Q = VOUT x CL CL 1000pF VOUT VOUT VOUT
Figure 5. Charge Injection
10
______________________________________________________________________________________
Low-Voltage, Phase-Reversal Analog Switch
_________________________________Test Circuits/Timing Diagrams (continued)
MAX4528
V+ V+
A B
V+ IN SWITCH SELECT
MAX4528
X Y 1MHz CAPACITANCE ANALYZER
GND
VV-
Figure 6. A, B, X, Y Capacitance
V+ 10nF NETWORK ANALYZER 50 V+ IN SWITCH SELECT GND 50 ON LOSS = 20log VOUT X, Y VMEAS. 50 10nF V50 REF VOUT VIN
V+
A, B
VIN
OFF ISOLATION = 20log
VOUT VIN
MAX4528
MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS. OFF ISOLATION IS MEASURED BETWEEN A, B AND "OFF" X, Y TERMINAL. ON LOSS IS MEASURED BETWEEN A, B AND "ON" X, Y TERMINAL. SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED. V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 7. Off Isolation and On Loss
______________________________________________________________________________________
11
Low-Voltage, Phase-Reversal Analog Switch MAX4528
____________________________________________________________Chip Topography
TRANSISTOR COUNT: 141 SUBSTRATE IS INTERNALLY CONNECTED TO V+
A V+ X
B
0.054" (1.37mm) Y
GND
N
V-
0.038 (0.97mm)
________________________________________________________Package Information
8LUMAXD.EPS
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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