L7250 データシートの表示（PDF） - STMicroelectronics

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L7250

5V & 12V SPINDLE AND VCM MOTORS DRIVER

STMicroelectronics 

L7250

ELECTRICAL CHARACTERISTCS (continued)

POWER SUPPLY [VCC5 & VCV] VCC5 = 5V ±10%, VCV = 12V ±10%. Tamb = 25°C (unless otherwise specified)

Symbol

Parameter

Test Condition

Min. Typ. Max. Unit

CURdacr DAC resolution

3

bit

CURdac_L DAC output

Reg04H ‘b4b3b2’ = 000

250

mV

CURdac_H DAC output

Reg04H ‘b4b3b2’ = 111

600

mV

CURlin DAC linearity

-10

+10 mV

Cbrake

Icbrake VCbrake leakage

VCbrake=5V

1

µA

VCM SECTION

CURRENT SENSE AMPLIFIER

Vts Common mode input voltage

range.

Sns _voff Input offset voltage

Sns_gain0 Differential Voltage GAIN0

Sns _gain1 Differential Voltage GAIN1

Sns_low VSENSE output saturation

voltage

Sns_high

sns_slew Output slew rate

Sns_band -3dB Bandwidth

GBD - not tested

Reg09H ‘b7’ = 0

Reg09H ‘b7’ = 1

Iload=+/-1mA

Vin_diff=+/- 500mV

Cload=50pF

Guaranteed by design

-0.6

VM+1 V

-12

12

mV

-5% 4.5 +5%

-5%

16 +5%

250 mV

4.75

1

200 400

V

V/µs

kHz

sns _cmrr Common mode rejection ratio

f < 10 KHz, tested at DC only

70

CMRR=AV DIFF/AV CM

sns _svrr supply voltage rejection ratio VCV f < 10 KHz, tested at DC only

60

ERROR SUMMING AMPLIFIER

err _gain Voltage gain

no load

60

err _band Unity gain bandwidth

Guaranteed by design

err _slew Output Slew Rate

Cload=50pF

1.5

err _ibias Input bias current

err _off Input offset voltage

-10

err_svrr supply voltage rejection ratio

f < 10 KHz, tested at DC only

60

err _clamp Low output (clamp) voltage

low

Isink = 1 mA, referred to Vref25

dB

dB

dB

4

MHz

V/µS

1

µA

0

10

mV

dB

TBD

V

7/46

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