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EL7457C
EL7457C
40MHz Non-Inverting Quad CMOS Driver
Features
* * * * * * * * * * * * * * Clocking Speeds Up To 40MHz 4 Channels 12 ns tr/tf at 1000pF Cload 1ns Rise and Fall Time Mismatch 1.5ns Prop Delay Mismatch Low Quiescent Current, <1mA Fast Output Enable Function, 12ns Wide Output Voltage Range 8V >VL >-5V -2V < VH < 15V 2A Peak Drive 3 On Resistance Input Level Shifters TTL/CMOS Input Compatible
General Description
The EL7457C is an ultra-high speed, non-inverting quad CMOS driver. It is capable of running at clock rates up to 40MHz and features 2A peak drive capability and a nominal on-resistance of just 3. The EL7457C is ideal for driving highly capacitive loads, such as storage and vertical clocks in CCD applications. It is also well suited to ATE pin driving, level-shifting and clock-driving applications. The EL7457C is capable of running from single or dual power supplies while using ground referenced inputs. Each output can be switched to either the high (VH) or low (VL) supply pins, depending on the related input pin. The inputs are compatible with both 3V and 5V CMOS and TTL logic. The output enable (OE) pin can be used to put the outputs into a high-impedance state. This is especially useful in CCD applications, where the driver should be disabled during power down. The EL7457C also features very fast rise and fall times which are matched to within 1ns. The propagation delay is also matched between rising and falling edges to within 2ns. The EL7457C is available in both the 16-Pin QSOP and 16-Pin SOIC packages. It is specified for operation over the -40C to +85C temperature range.
Applications
* * * * * * * CCD Drivers Digital Cameras Pin Drivers Clock / Line Drivers Ultrasound Transducer Drivers Ultrasonic and RF Generators Level Shifting
Ordering Information
Part No. EL7457CU EL7457CS Temp. Range -40C to +85C -40C to +85C Package 16-Pin QSOP 16-Pin SO Outline # MDP0040 MDP0027
Pin Layout Diagram
INA OE INB VL GND NC INC IND 1 2 3 4 5 6 7 8 EL7457C 16 15 14 13 12 11 10 9 VS+ OUTA OUTB NC
December 7, 1999
VH OUTC OUTD VS-
(c) 1998 Elantec, Inc.
EL7457C
EL7457C
40MHz Non-Inverting Quad CMOS Driver
Absolute Maximum Ratings (T = 25C)
A
Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. Supply Voltage (VS+ to GND) Input Voltage +16.5V GND -0.3V, VS+ +0.3V
Continuous Output Current Storage Temperature Range Ambient Operating Temperature Operating Junction Temperature Power Dissipation: Maximum ESD
100mA -65C to +150C -40C to +85C 125C See Curves 2kV
Important Note: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA.
Electrical Characteristics
VS+ = +5V, VS- = -5V, VH = +5V, VL = -5V, TA = 25C, unless otherwise specified Parameter Input VIH IIH VIL IIL Cin Rin Output ROV1 ROV2 ILeak IPK Power Supply IS tR tF tRFdelta tD-1 tD-2 tDdelta Tenable Tdisable Power Supply Current Rise Time Fall Time tR, tF Mismatch Turn-Off Delay Time Turn-On Delay Time tD-1 - TD-2 Mismatch Enable Delay Time Disable Delay Time Inputs = VS+ CL = 1000pF CL = 1000pF CL = 1000pF CL = 1000pF CL = 1000pF CL = 1000pF 0.5 13.5 13 0.5 12.5 14.5 2 12 12 1.5 mA ns ns ns ns ns ns ns ns Switching Characteristics ON Resistance VH to OUTx ON Resistance VL to OUTx Output Leakage Current Peak Output Current IOUT = -100mA IOUT = +100mA VH = VS+, VL = VSSource Sink 4.5 4 0.1 2.0 2.0 6 6 10 A A A Logic "1" Input Voltage Logic "1" Input Current Logic "0" Input Voltage Logic "0" Input Current Input Capacitance Input Resistance VIL = 0V 0.1 3.5 50 VIH = 5V 2.0 0.1 10 0.8 10 V A V A pF M Description Condition Min Typ Max Units
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EL7457C
EL7457C
40MHz Non-Inverting Quad CMOS Driver
Electrical Characteristics
VS+ = +15V, VS- = 0V, VH = +15V, VL = 0V, TA = 25C, unless otherwise specified Parameter Input VIH IIH VIL IIL Cin Rin Output ROV1 ROV2 Ileak IPK Power Supply IS tR tF tRFdelta tD-1 tD-2 tDdelta Tenable Tdisable Power Supply Current Rise Time Fall Time tR, tF Mismatch Turn-Off Delay Time Turn-On Delay Time tD-1 - tD-2 Mismatch Enable Delay Time Disable Delay Time Inputs = VS+ CL = 1000pF CL = 1000pF CL = 1000pF CL = 1000pF CL = 1000pF CL = 1000pF 0.8 11 12 1 11.5 13 1.5 12 12 2 mA ns ns ns ns ns ns ns ns ON Resistance VH to OUT ON Resistance VL to OUT Output Leakage Current Peak Output Current IOUT = -100mA IOUT = +100mA VH = VS+, VL = VSSource Sink 3.5 3 0.1 2.0 2.0 5 5 10 A A A Logic "1" Input Voltage Logic "1" Input Current Logic "0" Input Voltage Logic "0" Input Current Input Capacitance Input Resistance VIL = 0V 0.1 3.5 50 VIH = 5V 2.4 0.1 10 0.8 10 V A V A pF M Description Condition Min Typ Max Units
Switching Characteristics
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EL7457C
EL7457C
40MHz Non-Inverting Quad CMOS Driver
Typical Performance Curves
Max Power Switch Threshold vs Supply Voltage T=25C
11 1.0
10 1.8
High Limit = 2.4V 0.8 Max Power(W) ja=110C/W, SO-16 Input voltage (V) 1.6
0.6
1.4
Hysteresis
0.4 ja=158C/W, QSOP-16 0.2
1.2 Low Limit = 0.8V 1.0
0 0 25 50 Temperature (C) Quiescent Supply Current vs Supply Voltage T=25C 2.0 1.8 1.6 Supply Current (mA) "On" Resistance () 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 5 8 11 Supply Voltage (V) Rise/Fall Time vs Supply Voltage CL=1000pF, T=25C 25 12 15 All Inputs = VS+ All Inputs = 0 75 100
5
7
10 Supply Voltage (V)
12
15
9
8 9 8 7
"On" Resistance vs Supply Voltage IOUT=100mA, T=25C
VH to OUT 6 5 4 VL to OUT 3 2 5 10 Supply Voltage (V) Rise/Fall Time vs Temperature CL=1000pF, VS+=15V 16 15
1
2
20 Rise/Fall Time (ns) tR 15 tF 10 Rise/Fall Time (ns)
14 tF 12 tR 10
8
5 5 7.5 10 Supply Voltage (V) 12.5 15
6 -50
0
50 Temperature (C)
100
150
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EL7457C
EL7457C
40MHz Non-Inverting Quad CMOS Driver
Typical Performance Curves (cont.)
3 25 Propagation Delay vs Supply Voltage CL=1000pF, T=25C 4 18 16 20 Delay Time (ns) tD2 15 tD1 10 8 5 5.0 7.5 10.0 Supply Voltage (V) Rise/Fall Time vs Load VS+=15V, T=25C 12.5 15.0 6 -50 Delay Time (ns) 14 12 tD1 10 tD2 Propagation ,Delay vs Temperature CL=1000pF, VS+=15V
-25
0
25
50
75
100
125
Temperature (C) Supply Current Per Channel vs Capacitive Load VS+=VH=10V, VS-=VL=0V, T=25C, f=100kHz 12 10 Supply Current (mA) 8 6 4 2 0
5 140 120 100 80 60 40
6
Rise/Fall Time (ns)
tF 20 0 100 470 1000 2200
tR
4700
10000
100
1k Load Capacitance (pF)
10k
Load Capacitance (pF) Supply Current Per Channel vs Frequency CL=1000pF, T=25C
7 100
VS+=15V Supply Current (mA) 10
1.0
VS+=10V
VS+=5V 0.1 10k 100k 1M Frequency (Hz) 10M
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EL7457C
EL7457C
40MHz Non-Inverting Quad CMOS Driver
Nominal Operating Voltage Range
PIN VS+ to VSVS- to GND VH VL VH to VL VL to VSMIN 5V -5V VS- + 2.5V VS 0V 0V MAX 15V 0V VS + VS + 15V 8V
Timing Diagrams
5V Input 2.5V 0 Output 90% 10% tD1 tD2
tR
tF
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EL7457C
EL7457C
40MHz Non-Inverting Quad CMOS Driver
Standard Test Configuration
VS+ 10k
VS+ 0.1 F INA 1 2 3 4 4.7 F 0.1 F 5 NC 6 12 11 1000pF 10 9 1000pF OUTD OUTC 16 15 14 1000pF 13 NC 0.1 F 4.7 F 1000pF 4.7 F
OUTA
EN INB VL
OUTB VH
INC IND
7 8
VS0.1 F 4.7 F
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EL7457C
EL7457C
40MHz Non-Inverting Quad CMOS Driver
Pin Description
Pin 1 Name INA Function Input Channel A
VS+
Equivalent Circuit
INPUT
V SCircuit 1
2 3 4 5 6 7 8 9 10
OE INB VL GND NC INC IND VS OUTD
Output Enable Input Channel B Low Voltage Input Pin Input Logic Ground No Connection Input Channel C Input Channel D Negative Supply Voltage Output Channel D
(Reference Circuit 1) (Reference Circuit 1)
(Reference Circuit 1) (Reference Circuit 1)
VH
OUTPUT VSVL Circuit 2
11 12 13 14 15 16
OUTC VH NC OUTB OUTA VS +
Output Channel C High Voltage Input Pin No Connection Output Channel B Output Channel A Positive Supply Voltage
(Reference Circuit 2)
(Reference Circuit 2) (Reference Circuit 2)
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EL7457C
EL7457C
40MHz Non-Inverting Quad CMOS Driver
Block Diagram
OE
VH
VS+
INPUT Level Shifter GND 3-State Control OUTPUT
VS-
VL
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EL7457C
EL7457C
40MHz Non-Inverting Quad CMOS Driver
Application Information:
Product Description
The EL7457C is a high performance 40MHz ultra-high speed quad driver. Each channel of the EL7457C consists of a single P-channel high side driver and a single N-channel low side driver. These 3 devices will pull the output (OUTX) to either the high or low voltage, on VH and VL respectively, depending on the input logic signal (INX). It should be noted that there is only one set of high and low voltage pins. A common output enable (OE) pin is available on the EL7457C. This pin, when pulled low will put all outputs in to the high impedance state. The EL7457C is available in both the 16-pin SOIC and the space saving 16-pin QSOP packages. The relevant package should be chosen depending on the calculated power dissipation.
Power Dissipation Calculation
When switching at high speeds, or driving heavy loads, the EL7457C drive capability is limited by the rise in die temperature brought about by internal power dissipation. For reliable operation die temperature must be kept below Tjmax (125C). It is necessary to calculate the power dissipation for a given application prior to selecting the package type. Power dissipation may be calculated:
4
PD = ( V S x I S ) +
2 ( CINT x VS x f ) + ( CL x VO UT x f ) 2 1
where: * VS is the total power supply to the EL7457C (from VS+ to VS-), * Vout is the swing on the output (VH - VL), * CL is the load capacitance, * CINT is the internal load capacitance (50pF max.), * IS is the quiescent supply current (3mA max.) and * f is frequency Having obtained the application's power dissipation, a maximum package thermal coefficient may be determined, to maintain the internal die temperature below Tjmax.
( T jmax - T max ) ja = --------------------------------------PD
Supply Voltage Range and Input Compatibility
The EL7457C is designed for operation on supplies from 5V to 15V with 10% tolerance (i.e. 4.5V to 16.5V). The table on page 6 shows the specifications for the relationship between the VS+, VS-, VH, VL and GND pins. The EL7457C does not contain a true analog switch and therefore VL should always be less than VH. All input pins are compatible with both 3V and 5V CMOS signals With a positive supply (VS+) of 5V, the EL7457C is also compatible with TTL inputs.
Power Supply Bypassing
When using the EL7457C, it is very important to use adequate power supply bypassing. The high switching currents developed by the EL7457C necessitate the use of a bypass capacitor on both the positive and negative supplies. It is recommended that a 4.7 F tantalum capacitor be used in parallel with a 0.1 F low-inductance ceramic MLC capacitor. These should be placed as close to the supply pins as possible. It is also recommended that the VH and VL pins have some level of bypassing, especially if the EL7457C is driving highly capacitive loads.
where: * Tjmax is the maximum junction temperature (125C), * Tmax is the maximum operating temperature, * PD is the power dissipation calculated above. Using the value of ja, a suitable package for the application may be selected. In applications with a ja greater than 158C/W, a 16-pin QSOP may be used. A 16-pin SOIC is suitable for applications with a ja value greater than 110C/W. However,
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EL7457C
EL7457C
40MHz Non-Inverting Quad CMOS Driver
if the calculated value of ja is less than 110C/W, the application must be derated to prevent premature failure of the device, either by reducing the switching frequency, the capacitive load or the maximum operating temperature.
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EL7457C
EL7457C
40MHz Non-Inverting Quad CMOS Driver
General Disclaimer
Specifications contained in this data sheet are in effect as of the publication date shown. Elantec, Inc. reserves the right to make changes in the circuitry or specifications contained herein at any time without notice. Elantec, Inc. assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement.
WARNING - Life Support Policy
December 7, 1999
Elantec, Inc.
675 Trade Zone Blvd. Milpitas, CA 95035 Telephone: (408) 945-1323 (888) ELANTEC Fax: (408) 945-9305 European Office: +44-118-977-6080
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Elantec, Inc. products are not authorized for and should not be used within Life Support Systems without the specific written consent of Elantec, Inc. Life Support systems are equipment intended to support or sustain life and whose failure to perform when properly used in accordance with instructions provided can be reasonably expected to result in significant personal injury or death. Users contemplating application of Elantec, Inc. Products in Life Support Systems are requested to contact Elantec, Inc. factory headquarters to establish suitable terms & conditions for these applications. Elantec, Inc.'s warranty is limited to replacement of defective components and does not cover injury to persons or property or other consequential damages.
Printed in U.S.A.

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