Variable Reluctance Sensor Interfaces with
Differential Input and Adaptive Peak Threshold
ABSOLUTE MAXIMUM RATINGS
VCC to GND .............................................................-0.3V to + 6V
All Other Pins..............................................-0.3V to (VCC + 0.3V)
Current into IN+, IN-, IN_+, IN_-.......................................±40mA
Current into All Other Pins ................................................±20mA
Output Short-Circuit (OUT_, OUT) to GND.............................10s
Continuous Power Dissipation (TA = +70°C) (Note 1)
10-Pin µMAX (derate 8.8mW/°C above +70°C) ........707.3mW
16-Pin QSOP (derate 9.6mW/°C above +70°C)........771.5mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
µMAX
Junction-to-Ambient Thermal Resistance (θJA) ......113.1°C/W
Junction-to-Case Thermal Resistance (θJC) ................42°C/W
QSOP
Junction-to-Ambient Thermal Resistance (θJA) ......103.7°C/W
Junction-to-Case Thermal Resistance (θJC) ................37°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
ELECTRICAL CHARACTERISTICS
(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)
PARAMETER
SYMBOL
CONDITIONS
POWER SUPPLY
Operating Supply Range
Supply Current
VCC (Note 3)
MAX9924/MAX9925
ICC MAX9926/MAX9927
Power-On Time
PON
VCC > VUVLO = 4.1V, step time for VCC
~ 1µs
INPUT OPERATIONAL AMPLIFIER (MAX9925/MAX9927)
Input Voltage Range
IN+, IN-
Guaranteed by CMRR
Input Offset Voltage
VOS-OA
Temperature drift
MIN
4.5
0
Input Bias Current
Input Offset Current
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Output Voltage Low
Output Voltage High
IBIAS
IOFFSET
CMRR
PSRR
VOL
VOH
(Note 4)
(Note 4)
From VCM = 0 to VCC
MAX9925
MAX9927
IOL = 1mA
IOH = -1mA
75
88
77
VCC -
0.050
TYP
2.6
4.7
30
0.5
0.1
0.05
102
105
94
MAX UNITS
5.5 V
5
mA
10
150 µs
VCC
V
5 µV/°C
3 mV
6 nA
2 nA
dB
dB
0.050
V
V
Recovery Time from Saturation
Gain-Bandwidth Product
Slew Rate
Charge-Pump Frequency
tSAT
GBW
SR
fCP
To 1% of the actual VOUT after output
saturates
1.2 µs
1.4 MHz
2.3 V/µs
1.3 MHz
2 _______________________________________________________________________________________
