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19-1385; Rev 0; 10/98
Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer
General Description
The MAX4598 low-voltage, CMOS analog IC is a configurable single-ended 8-to-1/differential 4-to-1 multiplexer. In addition to the input channels, both V+ and GND can be switched to the output channels, enabling the supply voltages to be monitored. The MAX4598 operates from a single +2.7V to +12V supply or from dual 6V supplies. The device has low on-resistance (75 max) and TTL-compatible logic inputs from either 5V or a single +5V supply. Each switch can handle Rail-to-Rail (R) analog signals. The MAX4598 has two modes of operation: as a standard multiplexer and as a "latchable" multiplexer where the address lines are strobed. The off-leakage current is only 0.1nA at TA = +25C and 2nA at TA = +85C. ESD protection is > 2kV per Method 3015.7. The MAX4598 is available in small 20-pin SSOP, SO, and DIP packages.
Features
o V+ and GND Can Be Switched to the Output Channels o 75 (max) On-Resistance o Single-Ended or Differential Operation o 2pC (typ) Charge Injection o Latched or Unlatched Operation o TTL-Compatible Logic Inputs at 5V Supply o Handles Rail-to-Rail Analog Signals
MAX4598
Ordering Information
PART MAX4598CAP TEMP. RANGE 0C to +70C PIN-PACKAGE 20 SSOP 20 Wide SO 20 Plastic DIP Dice* 20 SSOP 20 Wide SO 20 Plastic DIP
Applications
ADC Systems Battery-Operated Equipment Test Equipment Avionics Audio-Signal Routing Networking
MAX4598CWP 0C to +70C MAX4598CCP 0C to +70C MAX4598C/D 0C to +70C MAX4598EAP -40C to +85C MAX4598EWP -40C to +85C MAX4598EPP -40C to +85C *Contact factory for dice specifications.
Pin Configuration/Functional Diagram
COMB A1 AO 1 2 3 LOGIC DECODER 20 19 18 GND A2 A3
NO4
4
17
NO8
NO2
5
16
NO6
NO3
6
15
NO7
NO1 VV+
7 8 9
14 13
NO5 EN LATCH
MAX4598
12
COMA
10
11
NLATCH
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 1-800-835-8769.
Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer MAX4598
ABSOLUTE MAXIMUM RATINGS
V+ to GND ..............................................................-0.3V to +13V V- to GND ...............................................................-13V to +0.3V V+ to V-...................................................................-0.3V to +13V A_, EN, LATCH, NLATCH, NO_, COM_ (Note 1)...............................................(V- - 0.3V) to (V+ + 0.3V) Continuous Current (any terminal)....................................20mA Peak Current, NO_, or COM_ (pulsed at 1ms, 10% duty cycle max) ............................40mA Continuous Power Dissipation (TA = +70C) SSOP (derate 8mW/C above +70C) .........................640mW Wide SO (derate 10mW/C above +70C)...................800mW Plastic DIP (derate 10.53mW/C above +70C) ..........889mW Operating Temperature Ranges MAX4598C_P ......................................................0C to +70C MAX4598E_P ...................................................-40C to +85C Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering, 10sec) .............................+300C
Note 1: Signals on NO_, COM_, EN, LATCH, NLATCH, or A_ exceeding V+ or V- are clamped by internal diodes. Limit forward current to maximum current ratings
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--Dual Supplies
(V+ = +5V 10%, V- = -5V 10%, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER SWITCH Analog Signal Range VCOM_, VNO_ RON (Note 3) ICOM_ = 1mA, VNO_ = 3.0V, V+ = 4.5V, V- = -4.5V ICOM_ = 1mA, VNO_ = 3.0V, V+ = 4.5V, V- = -4.5V ICOM_ = 1mA; VNO_ = -3V, 0, 3V; V+ = 4.5V, V- = -4.5V VNO_ = 4.5V, VCOM_ = 4.5V, V+ = 5.5V, V- = -5.5V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -0.1 -2 -0.2 -10 -0.2 -10 2.4 1.7 1.4 VEN = VA_ = VLATCH = VNLATCH = VCAL = V+ VEN = VA_ = VLATCH = VNLATCH = VCAL = 0 -0.1 -0.1 0.01 0.01 0.8 0.1 0.1 0.01 0.01 0.01 7 1 V45 V+ 75 100 4 6 10 13 0.1 nA 2 0.2 nA 10 0.2 nA 10 V V A A V SYMBOL CONDITIONS MIN TYP MAX UNIT
On-Resistance
On-Resistance Matching Between Channels (Note 4) On-Resistance Flatness (Note 5) NO Off-Leakage Current (Note 6) COM Off-Leakage Current (Note 6) COM On-Leakage Current (Note 6) LOGIC INPUTS Input High Voltage Input Low Voltage Input Current with Input Voltage High Input Current with Input Voltage Low 2
RON
RFLAT
INO(OFF)
VCOM_ = 4.5V, ICOM(OFF) VNO_ = 4.5V, V+ = 5.5V, V- = -5.5V ICOM(ON) VCOM_ = 4.5V, VNO_ = 4.5V, V+ = 5.5V, V- = -5.5V
VIH VIL IIH IIL
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Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer
ELECTRICAL CHARACTERISTICS--Dual Supplies (continued)
(V+ = +5V 10%, V- = -5V 10%, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER SUPPLY Power-Supply Range Positive Supply Current I+ VEN = VA_ = VLATCH = VNLATCH = 0 or V+, V+ = 5.5V, V- = -5.5V VEN = VA_ = VLATCH = VNLATCH = 0 or V+, V+ = 5.5V, V- = -5.5V VEN = VA_ = VLATCH = VNLATCH = 0 or V+, V+ = 5.5V, V- = -5.5V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = +25C 2 -90 40 4 10 55 90 120 70 100 5 2.7 -1 -5 -1 -5 -1 -5 65 0.001 0.001 0.001 6 1 A 5 1 A 5 1 A 5 100 150 V SYMBOL CONDITIONS MIN TYP MAX UNIT
MAX4598
Negative Supply Current
I-
GND Supply Current DYNAMIC Transition Time Break-Before-Make Interval (Note 3) Enable Turn-On Time Enable Turn-Off Time Charge Injection (Note 3) Off-Isolation (Note 7) Crosstalk Between Channels (Note 8) Logic Input Capacitance NO Off-Capacitance
IGND
tTRANS tOPEN tON tOFF VCTE VISO
Figure 1 Figure 2 Figure 3 Figure 3 CL = 1nF, VNO_ = 0, Figure 4 VEN = 0, f = 1MHz, Figure 5
ns ns ns ns pC dB
VCT CIN COFF
VEN = 2.4V, f = 1MHz, VGEN = 1Vp-p, TA = +25C Figure 5 f = 1MHz f = 1MHz, VEN = VCOM_ = 0, Figure 6 TA = +25C TA = +25C
-80 3 3
dB pF pF
COM Off-Capacitance
f = 1MHz, CCOM(OFF) VEN = VCOM_ = 0, Figure 6 CCOM(ON)
TA = +25C
15
pF
COM On-Capacitance LATCH TIMING (Note 3) Setup Time Hold Time
f = 1MHz, VEN = 2.4V, TA = +25C VCOM_ = 0 TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -10 -10
26
pF
tS tH
Figure 7 Figure 7
30 0
70 80
ns ns
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3
Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer MAX4598
ELECTRICAL CHARACTERISTICS--Single +5V Supply
(V+ = +5V 10%, V- = 0, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER SWITCH Analog Signal Range VNO_, VCOM_ RON (Note 3) ICOM_ = 1mA, VNO_ = 3.0V, V+ = 4.5V ICOM_ = 1mA, VNO_ = 3.0V, V+ = 4.5V ICOM_ = 1mA; VNO_ = 3V, 2V, 1V; V+ = 4.5V VNO_ = 4.5V, 1V; VCOM_ = 1V, 4.5V; V+ = 5.5V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -0.1 -2 -0.2 -10 -0.2 -10 2.4 1.6 1.3 VEN = VLATCH = VA_ = VNLATCH = V+ VEN = VLATCH = VA_ = VNLATCH = 0 -0.1 -0.1 0.01 0.01 0.8 0.1 0.1 8 0.1 nA 2 0.2 nA 10 0.2 nA 10 V V A A 2 0 80 V+ 150 200 8 12 V SYMBOL CONDITIONS CONDITIONS MIN TYP MAX UNIT
On-Resistance
On-Resistance Matching Between Channels (Notes 3, 4)
RON
On-Resistance Flatness
RFLAT
NO Off-Leakage Current (Notes 6, 9) COM Off-Leakage Current (Notes 6, 9) COM On-Leakage Current (Notes 6, 9) LOGIC INPUTS (Note 3) Input High Voltage Input Low Voltage Input Current with Input Voltage High Input Current with Input Voltage Low SUPPLY Power-Supply Range Positive Supply Current (Note 3) DYNAMIC (Note 3) Transition Time Break-Before-Make Interval Enable Turn-On Time Enable Turn-Off Time
INO(OFF)
VCOM_ = 4.5V, 1V; ICOM(OFF) VNO_ = 1V,4.5V; V+ = 5.5V ICOM(ON) VCOM_ = 4.5V, VNO_ = 4.5V, V+ = 5.5V
VIH VIL
2.7 I+ VEN = VA_ = VLATCH = VNLATCH = 0 or V+, V+ = 5.5V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 60 4 10 85 -1 -5 115
12.0 1
V A
5 160 210 140 170 100 120
tTRANS tOPEN tON tOFF
VNO_ = 3V, Figure 1 Figure 2 Figure 3 Figure 3
ns ns ns ns
4
_______________________________________________________________________________________
Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer
ELECTRICAL CHARACTERISTICS--Single +5V Supply (continued)
(V+ = +5V 10%, V- = 0, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER Charge Injection LATCH TIMING (Note 3) Setup Time Hold Time tS tH Figure 7 Figure 7 TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -10 -10 0 30 70 80 ns ns SYMBOL VCTE CONDITIONS CONDITIONS CONDITIONS CL = 1nF, VNO_ = 0, Figure 4 TA = +25C MIN TYP 1 MAX 5 UNIT pC
MAX4598
ELECTRICAL CHARACTERISTICS--Single +3V Supply
(V+ = +2.7V to +3.6V, V- = 0, VIH = 2.4V, VIL = 0.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER SWITCH Analog Signal Range On-Resistance LOGIC INPUTS (Note 3) Input High Voltage Input Low Voltage DYNAMIC (Note 3) Transition Time Enable Turn-On Time Enable Turn-Off Time LATCH TIMING (Note 3) Setup Time Hold Time tS tH Figure 7 Figure 7 TA = +25C TA = +25C -10 45 0 80 ns ns tTRANS tON tOFF VNO1 = 1.5V, VNO8 = 0, Figure 1 VNO1 = 1.5V, Figure 3 VNO1 = 1.5V, Figure 3 TA = +25C TA = +25C TA = +25C 200 160 120 310 250 180 ns ns ns RON (Note 3) ICOM_ = 0.2mA, VNO_ = 1.5V, V+ = 2.7V TA = +25C TA = TMIN to TMAX 2.4 1.1 1.0 0.6 0 220 V+ 500 600 V V V SYMBOL CONDITIONS CONDITIONS CONDITIONS MIN TYP MAX UNIT
IIH IIL
Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in this data sheet. Note 3: Guaranteed by design. Note 4: RON = RON(MAX) - RON(MIN). Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note 6: Leakage parameters are 100% tested at maximum-rated hot temperature and guaranteed by correlation at +25C. Note 7: Off-Isolation = 20log10(VCOM / VNO), VCOM = output, VNO = input to off switch. Note 8: Between any two switches. Note 9: Leakage testing at single supply is guaranteed by testing with dual supplies.
_______________________________________________________________________________________
5
Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer MAX4598
Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM AND TEMPERATURE (DUAL SUPPLIES)
MAX4598-01
ON-RESISTANCE vs. VCOM AND TEMPERATURE (SINGLE SUPPLY)
MAX4598-02
ON-RESISTANCE vs. VCOM (SINGLE SUPPLY)
170 150 V+ = +2.7V V+ = +3V 110 90 70 V+ = +5V
MAX4598-03
60 TA = +85C 50 40 RON () TA = +70C
90 80 70 60 RON () 50 40 30 20 TA = +25C TA = -40C TA = +70C TA = +85C
190
30 TA = +25C 20 10 0 -5 -4 -3 -2 -1 0 1 2 3 4 5 VCOM (V) TA = -40C
V+ = +5V V- = -5V
10 0 0
V+ = +5V V- = 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VCOM (V)
RON ()
130
50 30 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VCOM (V)
ON-RESISTANCE vs. VCOM (DUAL SUPPLIES)
MAX4598-04
LEAKAGE CURRENT vs. TEMPERATURE
MAX4598-05
SUPPLY CURRENT vs. TEMPERATURE
100n SUPPLY CURRENT (A) 10n 1n 100p 10p 1p 100f 10f 1f I+ IV+ = +5V V- = -5V
MAX4598-06
110 100 90 RON () 80 70 60 50 40 30 -5 -4 -3 -2 -1 0 1 2 3 4 5 VCOM (V) V+ = +5V V- = -5V V+ = +2.7V V- = -2.7V V+ = +3V V- = -3V
100n 10n LEAKAGE CURRENT (A) 1n 100p 10p COM (OFF) 1p 100f 10f -40 -20 0 20 40 60 80 NO (OFF) COM (ON)
1000n
100 120
-40 -20
0
20
40
60
80 100 120 140
TEMPERATURE (C)
TEMPERATURE (C)
TURN-ON/TURN-OFF TIMES vs. TEMPERATURE
V+ = +5V V- = -5V
MAX4598-07
TURN-ON/TURN-OFF TIMES vs. SUPPLY VOLTAGE (DUAL SUPPLIES)
MAX4598-08
80 70 60 tON 50 tOFF 40 30 20 -40 0 25 TEMPERATURE (C) 70
140 120 100
tON, tOFF (ns)
tON, tOFF (ns)
80 60 40 20 0
tON
tOFF
85
2
3 V+, V- (V)
4
5
6
_______________________________________________________________________________________
Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
MAX4598
FREQUENCY RESPONSE
0 -10 -20 -30 LOSS (dB) -40 -50 -60 -70 -80 -90 0.1 1 10 FREQUENCY (MHz) 100 1000 ON-PHASE OFF-ISOLATION INSERTION LOSS
MAX4598-09
CHARGE INJECTION vs. VCOM
140 100 60 PHASE (C) 20 -20 -60 -100 -140 -180 Q (pC) 5 4 3 2 1 0 -1 -2 -5 -4 -3 -2 -1 0 1 2 3 4 5 VCOM (V) V+ = +5V V- = 0 V+ = +5V V- = -5V
MAX4598-10
180
6
Pin Description
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 NAME COMB A1 A0 NO4 NO2 NO3 NO1 VV+ COMA NLATCH LATCH EN NO5 NO7 NO6 NO8 A3 A2 GND FUNCTION Multiplexer Output B Address Bit 1 Address Bit 0 Channel Input 4 Channel Input 2 Channel Input 3 Channel Input 1 Negative Supply Voltage Positive Supply Voltage Multiplexer Output A Data-Strobe Mode Select Latch Input Multiplexer Enable Channel Input 5 Channel Input 7 Channel Input 6 Channel Input 8 Address Bit 3 Address Bit 2 Ground
_______________Detailed Description
The MAX4598 can be configured as a single 8-channel or dual 4-channel multiplexer. In the single 8-to-1 multiplexer configuration, COMA connects to one of the eight inputs (NO1 to NO8), GND, or V+ by the address inputs A0 to A2 (see Truth Table). In the dual 4-to-1 multiplexer configuration, COMA connects to one of the four inputs (NO1, NO3, NO5, NO7), GND, or V+, and COMB connects to one of the four inputs (NO2, NO4, NO6, NO8) or GND by the address inputs A0 to A2 (see Truth Table). The MAX4598 functions as a standard multiplexer when NLATCH is high. When NLATCH is low, the condition set by A0 to A3 is activated at the rising edge of LATCH. Otherwise, the outputs remain at the previously set condition.
__________Applications Information
The MAX4598 construction is typical of most CMOS analog switches. It has three supply pins: V+, V-, and GND. The positive and negative power supplies are used to drive the internal CMOS switches and set the limits of the analog voltage on any switch. Reverse ESD-protection diodes are internally connected between each analog signal pin and V+ and V-. If the voltage on any pin exceeds V+ or V- by 0.3V, one of the ESD diodes starts to conduct. During normal operation these reverse-biased ESD diodes leak, forming the only current drawn from V-.
_______________________________________________________________________________________
7
Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer MAX4598
Truth Table
A3 x x 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 A2 x x 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 A1 x x 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 A0 x x 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 EN 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 x x x x x x x x x x x x x x x x LATCH x NLATCH x 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 COMA High-Z State is latched on the rising edge of LATCH NO1 NO2 NO3 NO4 NO5 NO6 NO7 NO8 NO1 NO3 NO5 NO7 GND V+ NO8 High-Z COMB High-Z State is latched on the rising edge of LATCH GND GND GND GND GND GND GND GND NO2 NO4 NO6 NO8 GND GND NO8 High-Z
x = Don't care
Virtually all the analog leakage current is through the ESD diodes. 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 leakage varies as the signal varies. The difference in the two diodes' leakage 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 a P-channel MOSFET, with their sources and drains paralleled and their gates driven out of phase with V+ and V- by the logic-level translators. V+ and GND power the internal logic and logic-level translators, and set the input logic thresholds. The logic-level translators convert the logic levels to switched V+ and V- signals to drive the analog switch gates. This drive signal is the only connection between
the logic supplies and the analog supplies. All pins have ESD protection to V+ and to V-. Increasing V- has no effect on the logic-level thresholds, but it does increase the drive to the P-channel switches, reducing their on-resistance. V- also sets the negative limit of the analog signal voltage. The logic-level thresholds are CMOS- and TTL-compatible when V+ is +5V. As V+ is raised, the threshold increases slightly; when V+ reaches +12V, the level threshold is about 3.2V, which is above the TTL output high-level minimum of 2.4V but still compatible with CMOS outputs.
Bipolar-Supply Operation
The MAX4598 operates with bipolar supplies between 2.7V and 6V. The V+ and V- supplies need not be symmetrical, but their sum cannot exceed the absolute maximum rating of 13V. Do not connect the MAX4598 V+ pin to +3V and connect the logic-level input pins to TTL logic-level signals. TTL logic-level outputs can exceed the absolute maximum ratings, causing damage to the part and/or external circuits.
8
_______________________________________________________________________________________
Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer
Caution: The absolute maximum V+ to V- differential voltage is 13V. Typical "6 Volt" or "12 Volt" supplies with 10% tolerances can be as high as 13.2V from V+ to V-. This voltage can damage the MAX4598. Even 5% tolerance supplies may have overshoot or noise spikes that exceed 13V. off-isolation, and distortion are degraded (see Typical Operating Characteristics). Single-supply operation also limits signal levels and interferes with grounded signals. When V- = 0, AC signals are limited to -0.3V. Voltages below -0.3V can be clipped by the internal ESD-protection diodes, and the parts can be damaged if excessive current flows.
MAX4598
Single-Supply Operation
The MAX4598 operates from a single supply between +2.7V and +12V when V- is connected to GND. All of the bipolar precautions must be observed. However, these parts are optimized for 5V operation, and most AC and DC characteristics are degraded significantly when departing from 5V. As the overall supply voltage (V+ to V-) is lowered, switching speed, on-resistance,
Power Off
When power to the MAX4598 is off (i.e., V+ = V- = 0), the Absolute Maximum Ratings still apply: neither logiclevel inputs on NO_ nor signals on COM_ can exceed 0.3V. Voltages beyond 0.3V cause the internal ESDprotection diodes to conduct, and the parts can be damaged if excessive current flows.
Test Circuits/Timing Diagrams
+5V NLATCH EN LATCH A3 A0 A1 A2 50 -5V tTRANS tTRANS V+ NO1 NO2-NO7 +3V tR < 20ns tF < 20ns
V+
LOGIC INPUT VEN
V+ 50% 0V VNO1 50%
MAX4598
GND
NO8 COMA V300
-3V VOUT 35pF
SWITCH OUTPUT VOUT
90%
0V 90% VNO8
Figure 1. Transition Time
+5V NLATCH V+ LOGIC INPUT VA V+ 50% 0V VOUT 90% GND COMA V300 -5V VOUT 35pF SWITCH OUTPUT VCOM 0V 50%
EN
LATCH A3 A0 VA A1 A2 50 NO1-NO8 +3V
tR < 20ns tF < 20ns
MAX4598
tOPEN
Figure 2. Break-Before-Make Interval
_______________________________________________________________________________________ 9
Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer MAX4598
Test Circuits/Timing Diagrams (continued)
+5V VEN VEN EN NLATCH V+ NO1 NO2-NO8 VOUT COMA VVOUT 1k 35pF 0V tON 90% 90% +3V V+ 50% 0V 50% tR < 20ns tF < 20ns
LATCH A3 A0 50
MAX4598
A1 A2 GND
-5V
tOFF
Figure 3. Enable Switching Time
+5V RS NO VEN VS CHANNEL SELECT EN A0 A1 A2 A3 GND V-5V CL 1nF NLATCH V+ LOGIC INPUT VEN VCOM VOUT VCOM VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. Q = (VOUT) (CL)
V+ ON 0V OFF ON
MAX4598
COMA
Figure 4. Charge Injection
+5V 10nF NETWORK ANALYZER 50 50 V OFF-ISOLATION = 20log OUT VIN V CROSSTALK = 20log OUT VIN MEAS. REF
V+
EN NLATCH
VNO_
VIN
V+ A_
MAX4598
COM_ VGND 10nF LATCH
VOUT
50
50
-5V
NOTES: MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM AND "OFF" TERMINAL ON EACH SWITCH. ON LOSS IS MEASURED BETWEEN COM AND "ON" TERMINAL ON EACH SWITCH.
Figure 5. Off-Isolation/Crosstalk
10 ______________________________________________________________________________________
Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer
Test Circuits/Timing Diagrams (continued)
+5V
____________________Chip Topography
A0 A1 COMB GND A2 A3
MAX4598
NLATCH A3 CHANNEL SELECT A2 A1
V+ NO1
NO8
1MHz CAPACITANCE ANALYZER
MAX4598
NO8 COM_
NO4 0.104" (2.64mm) NO6 NO7 NO5
A0 GND
NO2 NO3 NO1
LATCH, EN
V-
-5V
Figure 6. NO_/COM_ Capacitance
+5V
V- V+
EN +3V NO2 NO1, NO3-NO8 A1 A2 MAX4598 A3 NLATCH GND V-5V A0 V+ LATCH
COMA
LATCH
EN
NLATCH 0.092" (2.34mm)
TRANSISTOR COUNT: 287 SUBSTRATE CONNECTED TO V+
COM
LATCH 50% tS ADDRESS VIH VIL VIH - VIL 2 tH
NOTE: TIMING MEASUREMENT REFERENCE LEVEL IS
Figure 7. Setup Time, Hold Time
______________________________________________________________________________________
11
Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer MAX4598
NOTES
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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