A1425 查看數據表（PDF） - Allegro MicroSystems

零件编号

产品描述 (功能)

生产厂家

A1425

High Accuracy Analog Speed Sensor IC with Integrated Filter Capacitor and Dual Zero-Crossing Output Signal

Allegro MicroSystems 

A1425

High Accuracy Analog Speed Sensor IC with Integrated

Filter Capacitor and Dual Zero-Crossing Output Signal

OPERATING CHARACTERISTICS Valid at TA = – 40ºC to 150ºC, TJ ≤ 165°C; over operational air gap range and VCC within

operating range, unless otherwise noted. Typical operating parameters: VCC = 12 V and TA = 25°C.

Characteristic

Symbol

Test Conditions

Min. Typ. Max. Units

ELECTRICAL CHARACTERISTICS

Supply Voltage

VCC Operating; TJ < TJ(max)

Supply Current

ICC

Output Saturation Voltage

VOUT(SAT) ISINK = 20 mA

Output Leakage Current

IOFF VOUT = 24 V, Bdiff = 0

PROTECTION COMPONENT CHARACTERISTICS

4.0

– 26.5 V

–

4.2 7.0 mA

–

140 400 mV

–

–

5

μA

Reverse Supply Current

Supply Zener Current

Supply Zener Clamp Voltage1

Output Zener Current

Output Zener Clamp Voltage

Output Short Circuit Current Limit2

RESPONSE CHARACTERISTICS

IRCC VCC = –18 V

IZSupply VS = 28 V

VZSupply ICC = 10 mA, TA = 25°C

IZOutput VOUT = 28 V

VZOutput IOUT = 3 mA, TA = 25°C

IOUTS(lim)

–

–

–1 mA

–

–

10 mA

28

33

37

V

–

–

3

mA

28

–

–

V

–

–

50 mA

Power-On State

POS t < tResponse

– High –

V

Power-On Time3,7

Settling Time4,7

Response Time7

Upper Corner Frequency

Lower Corner Frequency

OUTPUT CHARACTERISTICS

tPO

tSettle

tResponse

fcu

fcl

VCC > VCC(min)

fBdiff ≥ 100 Hz

Equal to tPO + tS; fBdiff ≥ 100 Hz

–3 dB, single pole

–3 dB, single pole

–

4.5

9

ms

0

–

4.5

–

20

–

–

–

50 ms

59 ms

– kHz

20 Hz

Output Rise Time5

Output Fall Time

MAGNETIC CHARACTERISTICS

tr

RPU = 1 kΩ, COUT2 = 10 pF

tf

RPU = 1 kΩ, ISINK = 20 mA, COUT2 = 10 pF

–

–

200 ns

–

–

200 ns

Output Off Switchpoint6,7

BOP

Bdiff increasing, fBdiff = 200 Hz, Bdiff = 50 Gp-p;

digital output signal switches low to high

–11

0

11

G

Output On Switchpoint6,7

BRP

Bdiff decreasing, fBdiff = 200 Hz, Bdiff = 50 Gp-p;

digital output signal switches high to low

–11

0

11

G

Applied Magnetic Field7,8

Bdiff Differential p-p magnetic field

50

– 1250 G

1ICC equivalent to ICC(max) + 3 mA.

2IOUT does not change state when IOUT > IOUTS(lim), regardless of changes in the impinging magnetic field.

3Time required to initialize device.

4Time required for the output switchpoints to be within specification.

5Output Rise Time will be dominated by the RC time constant.

6For other sinusoidal signal frequencies and magnetic fields, –BOP = BRP = sinα(Bdiff ⁄ 2) ± 25%, where α is the phase shift shown in the Characteristic

Data section.

7See Definitions of Terms section.

8Exceeding the maximum magnetic field may result in compromised absolute accuracy.

Allegro MicroSystems, Inc.

3

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Share Link: