(VCC = 5V, VGND = 0V, MAX9925/MAX9927 gain setting = 1V/V, Mode A1, VBIAS = 2.5V, VPULLUP = 5V, RPULLUP = 1kΩ, CCOUT =

50pF. TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)

Note 2: Specifications are 100% tested at TA = +125°C, unless otherwise noted. All temperature limits are guaranteed by design.

Note 3: Inferred from functional PSRR.

Note 4: CMOS inputs.

Note 5: Guaranteed by design.

Note 6: Includes effect of VOS of internal op amp and comparator.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

EXT

EXT Voltage Range

VEXT

Mode B, TA = +125°C

1.5

VCC

- 1.1

V

Mode C, TA = +125°C

0.14

VCC

- 1.1

Input Current to EXT

IEXT

Mode B, VEXT > VBIAS; and Mode C

10

µA

DIRN (MAX9926 Only)

Output Low Voltage

0.2

V

INT_THRS, ZERO_EN

Low Input

VIL

0.3 x

VCC

V

High Input

VIH

0.7 x

VCC

V

Input Leakage

ILEAK

1

µA

Input Current ZERO_EN

ISINK

Pullup resistor = 10kΩ,

VZERO_EN = VGND

500

800

µA

Switching Time Between Modes

A1, A2, and Modes B, C

tSW

With INT_THRS = GND, auto peak-

detect is disabled, and EXT_THRS is

active

3

µs

BIAS

Input Current to BIAS

IBIAS

Modes A1, A2, B, C

1

µA

BIAS Voltage Range

VBIAS

Modes A1, B, TA = +125°C

1.5

VCC

- 1.1

V

Mode C, TA = +125°C

0.2

VCC

- 1.1

Internal BIAS Reference Voltage

VINT_BIAS

Mode A2 (MAX9924/MAX9926)

2.46

V

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Maxim Integrated │ 4

MAX9924–MAX9927

Variable Reluctance Sensor Interfaces with

Differential Input and Adaptive Peak Threshold

Electrical Characteristics (continued)