L9907 datasheet(27/49 Pages) STMICROELECTRONICS

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DS11800 Rev 5

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L9907

Electrical specifications

Note:

Table 21 is referred to current sense amplifier configuration for unidirectional current

measurement (shunt resistors to ground). SPI select: Offx=0 (Power up default), where

x=1,2 in CMD0 command frame.

Table 21. Ground current sense amplifier

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

Vin_off

Differential input offset

voltage

--5

Vio_step

Calibration step of

differential input offset

voltage(1)

VICM

Common Mode Input

Voltage Range

Operating

-2

Transient (t<1

s)

-7

Vobias

Output bias voltage

V(Isx+) -V(Isx-) = 0

0.2*Vcc-

0.5(2)

0.2*Vcc

0.2*Vcc+

0.5(3)

IOD

Input offset drift(3)

Vcc = 5V

µV/°C

CMRR

Input common mode

rejection ratio

-70

ISX+(4)

Positive input pin current

Gain = 10 to 100,



VCC = 5 V

-200

µA

ISX-(4)

Negative input pin

current

Gain = 10 to 100,



VCC = 5 V

-1

BST_C PSRR

Rejection ratio for Boost

output power supply to

Amplifier Input

V(BST_C) / V(IBx)

f=350KHz

40(5)

Gain

Gx1,Gx0 = 11 (x=1,2)

-2%

100

+2%

Gx1,Gx0 = 10 (x=1,2)

-2%

+2%

Gx1,Gx0 = 01 (x=1,2)

-2%

+2%

Gx1,Gx0 = 00 (x=1,2)

(default)

-2%

+2%

Gain temperature drift(3)

100

ppm/

°C

Voh

IBx output voltage high

level

V(Isx+) -V(Isx-) > 500 mV,



Iout = 100 µA, VCC = 3.3 V

Vcc -

0.12V

Voh

V(Isx+) -V(Isx-) > 500 mV,



Iout = 100 µA, VCC = 5 V

Vcc -

0.15V

Vol

IBx output voltage low

level

V(Isx+) -V(Isx-) < -500 mV,

Iout = 100 µA

100

SRCSO

CSO slew rate

RL = 1 kΩ, CL = 20 pF

V/µs

tSETTLING

Output settling time

Gain = 10,30, 50 and 100,

from 10% to 90%



RL = 1 kΩ, CL = 20 pF

µs

1. 30 calibration steps (15 for positive and 15 for negative direction) are available through SPI command for offset calibration.

2. Worst case, if gain=100 is selected.

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