Electrical specifications

L9907

26/49

DS11800 Rev 5

Gain

Gain

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

-2%

100

+2%

-

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

-2%

50

+2%

-

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

-2%

30

+2%

-

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

(default)

-2%

10

+2%

-

Gain temperature drift (3)

--

-

100

ppm/

°C

Voh

IBx output voltage high

level

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



Iout = 100 µA, VCC = 3.3 V

Vcc -

0.12V

--

-

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



Iout = 100 µA, VCC = 5V

Vcc -

0.15V

--

-

Vol

IBx output voltage low level

V(Isx+) -V(Isx-) <

-500mV, Iout = 100 µA

--

100

mV

SRCSO

CSO slew rate

RL = 1 kOhm, CL = 20 pF

0.5

2

-

V/µs

tSETTLING

Output settling time

Gain = 10,30, 50 and 100,

from 10% to 90%



RL = 1 kOhm, CL = 20 pF

--

5.0

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.

3. Guaranteed by design.



4.















Where:



ISxHI is current flowing out from ISxHI pin

ISxLO is current flowing out from ISxLO pin

Vcc = reference supply [5 V or 3.3 V]



Gnom = nominal programmed gain [10, 30, 50, 100]



I(trim,HI/LO) = offset trimming current (w.c. ±8 µA see expression below)



Phase = programmed phase configuration [1 if selected, otherwise 0]



I(rail) = current from auxiliary rail (used for floating OpAmp) [typ ~145 µA±35% T+Models]

























Where:



Vbg = band gap reference (1.2371 V nominal)



Ground = programmed ground configuration [1 if selected, otherwise 0]



Trimming bit weight= how many mV offset trimming are programmed.



The ± depends on offset trim direction (+: bit7=1, -: bit7=0)

5. A 350 kHz, 100 mVpp, ripple at the boost regulator output, generates 1 mVpp noise at the amplifier input. It represents a 2

App current noise on a 0.5 mΩ current sense resistor.

Table 20. Phase current sense amplifier (SPI select: Offx=1, where x=1,2) (continued)

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

ISxHI

0.8 VCC



2000 Gnom



-----------------------------------

Itrim HI





+





2

3 Phase





+



8

---------------------------------------------

10

A

+



–

=

ISxLO

0.8 VCC



2000 Gnom



-----------------------------------

Itrim LO





+



 2

8

---

10

AI rail



++



–

=

Itrim HI





Vbg

15

-----------

trimming bit

weight

2

-------------------

10300

5

3 Ground





+





----------------------------------------------------------------------

2

3 Phase





+



8

---------------------------------------------





=

Itrim LO





Vbg

15

-----------

trimming bit

weight

2

-------------------

10300

5

3 Ground





+





----------------------------------------------------------------------

2

8

---





=