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LT1787HVIS8 Datasheet

  • LT1787HVIS8

  • Precision, High Side Current Sense Amplifiers

  • 12頁

  • LINER

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LT1787/LT1787HV
Precision, High Side
Current Sense Amplifiers
FEATURES
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Input Offset Voltage: 75
碌
V (Max)
60V Supply Operation (LT1787HV)
12-Bit Dynamic Range
Operating Current: 60碌A(chǔ)
User-Selectable External Sense Resistor
Bidirectional High Side Current Sensing
Unidirectional or Bidirectional Output
Input Noise Filtering
Available in 8-Lead SO and MSOP Packages
APPLICATIO S
s
s
s
s
s
s
Battery Monitoring
Power Monitoring
Portable Phones
Cellular Phones
Portable Test/Measurement Systems
Battery-Operated Systems
The LT
廬
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 depicts the direction
and magnitude of the sense current. The LT1787 delivers
greater than a 12-bit dynamic range with ultralow 40碌V
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
鈥?/div>
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 60碌A(chǔ) and are
available in 8-lead SO and MSOP packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
12-Bit Dynamic Resolution Unidirectional Output into LTC
廬
1286 ADC
TO
LOAD
I = 100A
1
FIL
鈥?/div>
LT1787HV
R
SENSE
0.0016鈩?/div>
FIL
+
8
2.5V TO 60V
INPUT OFFSET VOLTAGE (碌V)
50
40
30
20
10
0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
0
10
30
40
50
20
TOTAL SUPPLY VOLTAGE (V)
60
鈥?/div>
2 V
S
V
S+
7
3
4
DNC
V
EE
V
BIAS
6
R
OUT
20k
V
OUT
C2
0.1碌F
5
R1
15k
C1
1碌F
V
REF
V
CC
CS
+IN
LTC1286 CLK
鈥揑N
D
GND
OUT
5V
TO
碌P
V
OUT
= V
BIAS
+ (8 鈥?I
LOAD
鈥?R
SENSE
)
LT1634-1.25
1787 TA01
U
Input Offset Voltage vs Supply Voltage
1787 TA01b
U
U
1

LT1787HVIS8 產(chǎn)品屬性

  • LT1787/HV

  • 100

  • 集成電路 (IC)

  • Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

  • -

  • 電流檢測

  • 1

  • -

  • -

  • -

  • -

  • -

  • 40µV

  • 60µA

  • 50µA

  • 2.5 V ~ 60 V，±1.25 V ~ 30 V

  • -40°C ~ 85°C

  • 表面貼裝

  • 8-SOIC（0.154"，3.90mm 寬）

  • 8-SO

  • 管件

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