LMP8640MKE-T datasheet(6/22 Pages) TI1

Part #	LMP8640MKE-T

Description	Precision High Voltage Current Sense Amplifier

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Manufacturer	TI1 [Texas Instruments]

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LMP8640

LMP8640HV

SNOSB28F – AUGUST 2010 – REVISED APRIL 2013

www.ti.com

12V Electrical Characteristics

(1) (continued)

Unless otherwise specified, all limits ensured for at TA = 25°C, VS=V

+ – V-, V

SENSE= +IN-(-IN), V

+ = 12V, V− = 0V, −2V < V

CM <

76V, RL = 10MΩ. Boldface limits apply at the temperature extremes.

Parameter

Test Conditions

Min(2)

Typ(3)

Max(2)

Unit

Fixed Gain LMP8640-T

20

V/V

LMP8640HV-T

Fixed Gain LMP8640-F

50

V/V

LMP8640HV-F

Gain AV

Fixed Gain LMP8640-H

100

V/V

LMP8640HV-H

-0.25

0.25

Gain error

VCM = 2.1V

%

-0.51

0.51

Accuracy over temperature(5)

−40°C to 125°C, VCM=2.1V

26.2

ppm/°C

PSRR

Power Supply Rejection Ratio

VCM = 2.1V, 2.7V < V

+ < 12V,

85

dB

LMP8640HV 2.1V < VCM < 42V

103

LMP8640 2.1V < VCM< 42V

CMRR

Common Mode Rejection Ratio

dB

LMP8640HV 2.1V < VCM < 76V

95

-2V <VCM < 2V,

60

Fixed Gain LMP8640-T

DC VSENSE = 67.5 mV,

950

LMP8640HV-T (5)

CL = 30 pF ,RL= 1MΩ

Fixed Gain LMP8640-F

DC VSENSE =27 mV,

BW

450

kHz

LMP8640HV-F (5)

CL = 30 pF ,RL= 1MΩ

Fixed Gain LMP8640-H

DC VSENSE = 13.5 mV,

230

LMP8640HV-H (5)

CL = 30 pF ,RL= 1MΩ

VCM =5V, CL = 30 pF, RL = 1MΩ,

LMP8640-T LMP8640HV-T VSENSE =500mVpp,

SR

Slew Rate (7) (5)

1.8

V/µs

LMP8640-F LMP8640HV-F VSENSE =200mVpp,

LMP8640-H LMP8640HV-H VSENSE =100mVpp,

RIN

Differential Mode Input Impedance(5)

5

k

Ω

1050

VCM = 2.1V

720

1250

IS

Supply Current

µA

2800

VCM = −2V

2300

3000

Maximum Output Voltage

VCM = 2.1V

11.85

V

LMP8640-T LMP8640HV-T

18.2

VCM = 2.1V

VOUT

LMP8640-F LMP8640HV-F

Minimum Output Voltage

40

mV

VCM = 2.1V

LMP8640-H LMP8640HV-H

80

VCM = 2.1V

CLOAD

Max Output Capacitance Load(8)

30

pF

(7)

The number specified is the average of rising and falling slew rates and measured at 90% to 10%.

(8)

This parameter is ensured by design and/or characterization and is not tested in production.

6

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