Datasheet

MAX9924–MAX9927
Variable Reluctance Sensor Interfaces with
Differential Input and Adaptive Peak Threshold
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= 5V, V
GND
= 0V, MAX9925/MAX9927 gain setting = 1V/V, Mode A1, V
BIAS
= 2.5V, V
PULLUP
= 5V, R
PULLUP
= 1kΩ, C
COUT
=
50pF. T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
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.
V
CC
to GND.............................................................-0.3V to + 6V
All Other Pins..............................................-0.3V to (V
CC
+ 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 (T
A
= +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
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER SUPPLY
Operating Supply Range V
CC
(Note 3) 4.5 5.5 V
MAX9924/MAX9925 2.6 5
Supply Current I
CC
MAX9926/MAX9927 4.7 10
mA
Power-On Time P
ON
V
CC
> V
UVLO
= 4.1V, step time for V
CC
~ 1µs
30 150 µs
INPUT OPERATIONAL AMPLIFIER (MAX9925/MAX9927)
Input Voltage Range IN+, IN- Guaranteed by CMRR 0 V
CC
V
Temperature drift 5 µV/°C
Input Offset Voltage V
OS-OA
0.5 3 mV
Input Bias Current I
BIAS
(Note 4) 0.1 6 nA
Input Offset Current I
OFFSET
(Note 4) 0.05 2 nA
Common-Mode Rejection Ratio CMRR From V
CM
= 0 to V
CC
75 102 dB
MAX9925 88 105
Power-Supply Rejection Ratio PSRR
MAX9927 77 94
dB
Output Voltage Low V
OL
I
OL
= 1mA 0.050 V
Output Voltage High V
OH
I
OH
= -1mA
V
CC
-
0.050
V
Recovery Time from Saturation t
SAT
To 1% of the actual V
OUT
after output
saturates
1.2 µs
Gain-Bandwidth Product GBW 1.4 MHz
Slew Rate SR 2.3 V/µs
Charge-Pump Frequency f
CP
1.3 MHz
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
.
µMAX
Junction-to-Ambient Thermal Resistance (θ
JA
) ......113.1°C/W
Junction-to-Case Thermal Resistance (θ
JC
) ................42°C/W
QSOP
Junction-to-Ambient Thermal Resistance (θ
JA
) ......103.7°C/W
Junction-to-Case Thermal Resistance (θ
JC
) ................37°C/W
PACKAGE THERMAL CHARACTERISTICS (Note 1)