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LM1964VNSN/a743avaiSENSOR INTERFACE AMPLIFIER


LM1964V ,SENSOR INTERFACE AMPLIFIERFeatures I Normal circuit operation guaranteed with inputs up to 3V below ground on a single su ..
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LM1964V
SENSOR INTERFACE AMPLIFIER
LM1964
gil National
[ Semiconductor
LM1964 Sensor Interface Amplifier
General Description
The LM1964 is a precision differential amplifier specifically
designed for operation in the automotive environment. Gain
accuracy is guaranteed over the entire automotive tempera-
ture range (-40''C to + 125''C) and is factory trimmed prior
to package assembly. The input circuitry has been specifi-
cally designed to reject tttttttmon-mode signals as much as
3V below ground on a single positive power supply. This
facilitates the use of sensors which are grounded at the
engine block while the LM1964 itself is grounded at chassis
potential. An external capacitor sets the maximum operating
frequency of the amplifier, thereby filtering high frequency
transients. Both inputs are protected against accidental
shorting to the battery and against load dump transients.
The input impedance is typically 1 Mn.
The output op amp is capable of driving capacitive loads
and is fully protected. Also, internal circuitry has been pro-
vided to detect open circuit conditions on either or both in-
puts and force the output to a "home" position (a ratio of
the external reference voltage).
Features
" Normal circuit operation guaranteed with inputs up to
3V below ground on a single supply
a Gain factory trimmed and guaranteed over temperature
(i3°/o of full-scale from -4UC to +125°C)
a Low power consumption (typically 1 mA)
a Fully protected inputs
I: Input open circuit detection
" Operation guaranteed over the entire automotive tem-
perature range (-40'C to + 125°C)
II Single supply operation
Schematic and Connection Diagrams
a Cl m
2L it Kirk I "
-Vm +Vm L
w . Cl sun
TL/H/6744-1
Plastic Chip Carrier Package
sl 2l "
INVERTING '
INPUT "
NON-INVERTINGl
y Order Number LM1964V
cc See NS Package Number V20A
la i; la]
'l ml iil ml Isl
I . ' O
'Pins1,3,4,6,8,9,10,11,13,14,16,18,19are
trim pins and should be left floating.
' TL/H/6744-6
Top View
Absolute Maximum Ratings
If Mllltary/Aerospace specified devices are required,
please contact the National
Semiconductor Sales
Office/Dlstrlbutors for availability and speclflcatlons.
Vcc Supply Voltage (RVCC = 15 k0)
VREF Supply Voltage
DC Input Voltage (Either Input)
Input Transients (Note 1)
Power Dissipation (see Note 6)
Output Short Circuit Duration
-0.3V to + 6V
-3V to + 16V
1350 mW
Indefinite
Operating Temperature Range
Storage Temperature Range
Soldering Information
Plastic Chip Carrier Package
Vapor Phase (60 seconds)
Infrared (15 seconds)
-4ty'C to + 125°C
-65''C to +150°C
See AN-450 "Surface Mounting Methods and Their Effect
on Product Reliability" for other methods of soldering sur-
face mount devices.
Electrical Characteristics Vcc = 12V, VREF = 5V, TA = 25°C unless otherwise noted
Parameter Conditions (Note 2) (Note 3) Units
Min Typ Max Min Typ Max
Differential Voltage Gain Vas = 0.5V 4.41 4.50 4.59 V/V
_ IV S VCM S + IV
VaF--0.5V, -4ty'CecTAs; 125''C 4.36 4.50 4.64 V/V
_ 3V g VCM S + 1V
Gain Error (Note 5) OSVDIFSW --2 0 2 °/o/FS
- 1V S VCM S + 1V
osvomsw -3 o 3 %/FS
- 3V S VCM g + 1V
-4ty'Cs:TAs; +125°c
Differential Input Resistance 0 s Var: s 1 V 1.00 1.20 Mft
- 1V S VCM f + IV
osvwsw 0.70 1.20 Mit
- 3V S VCM S + IV
- 40°C s; TA +125°o
Non-lnverting Input Bias OSVD'FS 1V 0.3 1.0 “A
Current -IVrcVcMs; +1V
OSVDIFS1V 0.3 1.5 pA
- 3V S VCM S + 1V
- 40°C STA s +125°C
Inverting Input Bias Current OSVDIFS 1V 45 100 pLA
- IV s; VCM g + 1 v
OVSVDIFS1V 45 150 “A
- 3V S VCM S + IV
-40°CSTAS +125''C
Vcc Supply Current Vcc = 12V, RVcc = 15k 300 500 0A
VREF Supply Current 4.75VecVRErsc5.5V 0.5 1.0 mA
Common-Mode Voltage - 40°C s:TAs: +125°C - 1 1 - 3 1 V
Range (Note 4)
DC Common-Mode Input Referred 50 60 dB
Rejection Ratio -1Vs VCM s + 1V
Var: = 0.5V
Open Circuit Output Voltage One or Both Inputs 0.371 0.397 0.423 XVREF
Open, --1Vs2VcMs; +1V
--3VscVcMrc +1V 0.365 0.397 0.429 XVREF
-4ty'CSTA S +125°C
Short Circuit Output Current Output Grounded 1.0 2.7 5.0 mA
Vcc Power Supply Rejection Vcc--- 12V, vac = 15K 50 65 dB
Ratio Vat: = 0.5V
VREF Power Supply VREF = 5 VDC 60 74 dB
Rejection Ratio Vor = 0.5V
Note t.. This test is performed with a 10000 source impedance.
Note 2: These parameters are guaranteed and 100% production iested.
Note 3: These parameters will be guaranteed but not 100% production tested.
Note 4: The LM1964 has been designed to common-mode to -3V, but production testing is only performed at 11V.
Note 5: Gain error is given as a percent of full-scale. Fuil-scale is defined as IV at the input and 4.5V at the output.
Note 6: For operation in ambient temperatures above 25''C the device must be derated based on a maximum junction temperature of 150'C and a thermal
resistance of 93''C/W junction to ambient.
1796lW'l
LM1964
Typical Performance Characteristics
VHEF SUP?“ CURRENT (M) (+ )INPUT BIAS CURREN‘I’ (M)
8M0!" CIRCUIT OUTPUT CURRENT (mA)
Non-lnvertlng Input Blas
Current " Temperature
-50-ts 0 25 50 " 100125150
TEMPERATURE (°C)
VREF Supply Current vs
Temperature
Vnzr =5.0V
-50 -25 0 N 50 " 100125150
TEMPERATURE ('0)
Short Circuit Output
' Current vs Temperature
-s0-N 0 25 50 15100125150
TEMPERATU BE (°C)
Inverting Input Blas Current
" Temperature
( - 1mm ms cunnm (m
-50-N 0 " 50 75100125150
mMEMT0ttE (°C)
Vcc Supply Current vs
Temperature
Vcc SUPPLY CURRENT (mA)
-M-ts 0 tli 50 75100125150
TEMPERATURE (''tll
Differential Gain vs
Temperature
a 4.600
-' 4.550
5 4.400
--50-N 0 N 50 75 100125150
TEMPERATURE (“0)
TL/H/6744- 3
Typical Performance Characteristics (Continued)
Voltage Gain " Frequency
vnmasaluutaa)
Ill IN 1k 10k 100k
FREQUENCY (hit)
VREF Power Supply
Rejectlon
Vnzr-s Vuc
IN meu
teo pF
POWER SUPPLY REJECHON (dB)
Ill IN 1k IN 100k
FREQUENCY Mr)
Test Circuit
".75ll-tr5tW)
CMRR " Frequency
tlrrattpr
cu=1Vrma
CHRR (d8) INPUT RE.
lil 100 1k 10k 100k
FREQUENCY (ht)
Vcc Power Supply Rejectlon
0.01 pf -
NON-INVEHTING 7
INVERTING 5
'..1. so
10 100 " ttik 100k
FREQUENCY (Hz)
TL/H/6744-4
(9V-16V)
- 0.01 "
jinn pF
TL/H/s744-5
V96l-W'l
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This file is the datasheet for the following electronic components:
LM1964V - product/lm1964v?HQS=T|-nu|l-nuII-dscatalog-df-pf—nuII-wwe
LM1964 - product/Im1964?HQS=T|-nu|I-null-dscatalog-df—pf—nulI-wwe
LM1964 - productllm1964?HQS=T|—nu||—nu|I-dscatalog-df-pf-nulI-wwe
LM1964V - product/Im1964v?HQS=T|-nu|l-nuII-dscatalog-df—pf—nuII-wwe
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