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

ADC AUXILIARY INPUT

AUX_ran Input range 0

ge0

Reg06H ‘b3’ = 0

Referred to Vref25

±1

V

AUX_ran Input range 1

ge1

Reg06H ‘b3’ = 1

Referred to Vref25

±2.25

V

AUX_Ibias Input bias

-100

100

µA

VCM VOLTAGE AMPLIFIER

Volt_gain Voltage gain

0.165

V/V

Volt_off Input offset

-15

+15 mV

Volt Common mode rejection ratio

f < 10 KHz, tested at DC only

46

dB

_cmrr

CMRR=AV DIFF/AV CM

Volt supply voltage rejection ratio

f < 10 KHz, tested at DC only

60

dB

_svrr

BEMF processor amplifier

CalCoar Calcoarse voltage input range

seIn

0.5

2

V

Gain1 First stage gain

Vcontrol = 1.25 V

1.91

V/V

Gain2 Second stage gain

16

V/V

Offset Residual input offset after

calibration

Vcontrol = 1.25V

-3

(Measured between VCMN and

SNS_P pins)

+3

mV

Rout BEMF amp output resistance (pin

31)

500

ohm

ULOAD @ POR

Timer1_V Timer1 Charging Voltage

2.5

V

Timer1_I Timer1 Discharging Current

Timer1_T Timer1 Low threshold

2

µA

0.2

V

VOLTAGE REGULATORS

1.8 AND 3.3 LINEAR REGULATOR

V18 feed 1.8V feedback Voltage

V33 OUT 3.3V Output Voltage

-5% 1.25 +5%

V

-5% 3.3 +5%

V

9/46

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