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LT1787CMS8#TR

Description
SP Amp Current Sense Amp Single 36V Automotive 8-Pin MSOP T/R
File Size249KB,16 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric View All

LT1787CMS8#TR Overview

SP Amp Current Sense Amp Single 36V Automotive 8-Pin MSOP T/R

LT1787CMS8#TR Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesNot Compliant
ECCN (US)EAR99
Part StatusUnconfirmed
SVHCYes
SVHC Exceeds ThresholdYes
TypeCurrent Sense Amplifier
Number of Elements per Chip1
Number of Channels per Chip1
Maximum Voltage Gain Range (dB)<35
Maximum Voltage Gain (dB)18.32
Minimum PSRR (dB)120
Typical Output Current (mA)0.05@36V
Maximum Input Offset Voltage (mV)0.125@5V
Maximum Operating Supply Voltage (V)36
Maximum Supply Voltage Range (V)30 to 50
Minimum Single Supply Voltage (V)2.5
Typical Single Supply Voltage (V)9|12|15|18|24|28|3|5
Maximum Single Supply Voltage (V)36
Maximum Supply Current (mA)0.12@36V@0C to 70C
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeCommercial
PackagingTape and Reel
Power Supply TypeSingle
Pin Count8
Standard Package NameMSOP
Supplier PackageMSOP
MountingSurface Mount
Package Height0.86
Package Length3
Package Width3
PCB changed8
Lead ShapeGull-wing
LT1787/LT1787HV
Precision, High Side
Current Sense Amplifiers
FEATURES
DESCRIPTIO
Input Offset Voltage: 75
µ
V (Max)
60V Supply Operation (LT1787HV)
12-Bit Dynamic Range
Operating Current: 60µA
User-Selectable External Sense Resistor
Bidirectional High Side Current Sensing
Unidirectional or Bidirectional Output
Input Noise Filtering
–40°C to 125°C Operating Temperature Range
Available in 8-Lead SO and MSOP Packages
APPLICATIO S
Battery Monitoring
Power Monitoring
Portable Phones
Cellular Phones
Portable Test/Measurement Systems
Battery-Operated Systems
The LT
®
1787 is a complete micropower precision high
side current sense amplifier. The LT1787 monitors bidi-
rectional currents via the voltage across an external sense
resistor. A current or voltage output indicates the direction
and magnitude of the sense current. The LT1787 delivers
greater than a 12-bit dynamic range with ultralow 40µV
input offset voltage compared to a typical 250mV full-
scale input voltage. A fixed gain of 8 is set by onboard
precision resistors. Input signal filtering is easily imple-
mented with a capacitor between the FIL
and FIL
+
pins.
The LT1787HV operates from 2.5V to 60V total supply
voltage and the LT1787 operates from 2.5V to 36V total
supply voltage. Both versions have a PSRR in excess of
120dB. The LT1787/LT1787HV draw only 60µA and are
available in 8-lead SO and MSOP packages.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
12-Bit Dynamic Resolution Unidirectional Output into LTC
®
1286 ADC
TO
LOAD
I = 100A
1
FIL
LT1787HV
R
SENSE
0.0016Ω
FIL
+
8
2.5V TO 60V
INPUT OFFSET VOLTAGE (µV)
50
40
30
20
10
0
–10
–20
–30
–40
–50
0
10
30
40
50
20
TOTAL SUPPLY VOLTAGE (V)
60
2 V
S
V
S+
7
3
4
DNC
V
EE
V
BIAS
6
R
OUT
20k
V
OUT
C2
0.1µF
5
R1
15k
C1
1µF
V
REF
V
CC
CS
+IN
LTC1286 CLK
–IN
D
GND
OUT
5V
TO
µP
V
OUT
= V
BIAS
+ (8 • I
LOAD
• R
SENSE
)
LT1634-1.25
1787 TA01
U
Input Offset Voltage vs Supply Voltage
1787 TA01b
U
U
1787fc
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