MAX9925 Ver la hoja de datos (PDF) - Maxim Integrated
Número de pieza
componentes Descripción
Fabricante
MAX9925
Maxim Integrated
MAX9925 Datasheet PDF : 23 Pages
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Variable Reluctance Sensor Interfaces with
Differential Input and Adaptive Peak Threshold
ELECTRICAL CHARACTERISTICS (continued)
(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
INPUT DIFFERENTIAL AMPLIFIER (MAX9924/MAX9926)
CONDITIONS
Input Voltage Range
IN+, IN-
Guaranteed by CMRR
Differential Amplifier
Common-Mode Rejection Ratio
Input Resistance
ADAPTIVE PEAK DETECTION
CMRR
RIN
MAX9924 (Note 5)
MAX9926 (Note 5)
(Note 5)
MIN TYP MAX UNITS
-0.3
VCC +
V
0.3
60
87
dB
55
78
65
100 135
kΩ
Zero-Crossing Threshold
Mode B
MAX9924/MAX9925
-6.5
0
+6.5
VZERO_THRESH operation
mV
(Notes 5, 6) MAX9926/MAX9927
-6.5
0
+10
VADAPTIVE
Adaptive peak threshold
Minimum threshold of hysteresis
comparator MAX9924/MAX9926
(Notes 5, 6)
33
%PK
4
15
30
Fixed and Adaptive Peak
Threshold
VMIN-THRESH
Minimum threshold of hysteresis
comparator MAX9925/MAX9927
(Notes 5, 6)
VMIN-THRESH - VZERO-THRESH for
MAX9924 (Notes 5, 6)
VMIN-THRESH - VZERO-THRESH for
MAX9926 (Notes 5, 6)
VMIN-THRESH - VZERO-THRESH for
MAX9925/MAX9927 (Notes 5, 6)
20
30
50
mV
7
15
26
2
15
30
19
30
50
Watchdog Timeout for Adaptive
Peak Threshold
Timing window to reset the adaptive
tWD
peak threshold if not triggered (input
45
85
140
ms
level below threshold)
ENTIRE SYSTEM
Comparator Output Low Voltage
Propagation Delay
COUT Transition Time
VCOUT_OL
tPDZ
tPDA
tHL-LH
Overdrive = 2V to 3V, zero-crossing
Overdrive = 2V to 3V, adaptive peak
0.2
V
50
ns
150
2
ns
Includes noise of differential amplifier
Propagation Delay Jitter
tPD-JITTER and comparator, f = 10kHz,
20
ns
VIN = 1VP-P sine wave
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