Rainbow Electronics MX7705 - Manual (Page 3)

MX7705
16-Bit, Low-Power, 2-Channel,
Sigma-Delta ADC
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ELECTRICAL CHARACTERISTICS (continued)
(V DD = 3V or 5V, GND = 0, V REF+ = 1.225V for V DD = 3V and V REF+ = 2.5V for V DD = 5V, V REF- = GND, external f CLKIN =
2.4576MHz, CLKDIV bit = 0, C REF+ to GND = 0.1µF, C REF - to GND = 0.1µF, T A = T MIN to T MAX , unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Gain = 1 34
Gain = 2 38
Gain = 4 45
AIN Input Capacitance
Gain = 8 to 128 60
pF
AIN Input Sampling Rate f s Gain = 1 to 128
f CLKIN /
64
MHz
Gain = 1 96
Gain = 2 105
Gain = 4 110
V DD = 5V
Gain = 8 to 128 130
Gain = 1 105
Gain = 2 110
Gain = 4 120
Input Common-Mode Rejection CMR
V DD = 3V
Gain = 8 to 128 130
dB
Normal-Mode 50Hz Rejection
For filter notches of 25Hz, 50Hz,
±0.02
× f
NOTCH
98 dB
Normal-Mode 60Hz Rejection
For filter notches of 20Hz, 60Hz,
±0.02
× f
NOTCH
98 dB
Common-Mode 50Hz Rejection
For filter notches of 25Hz, 50Hz,
±0.02
× f
NOTCH
150 dB
Common-Mode 60Hz Rejection
For filter notches of 20Hz, 60Hz,
±0.02
× f
NOTCH
150 dB
EXTERNAL REFERENCE (REF+, REF-)
V DD = 4.75V to 5.25V 1.0 3.5 REF Differential Input Voltage
Range (Note 9)
V REF
V DD = 2.7V to 3.6V 1.00 1.75
V
RE F Ab sol ute Inp ut V ol tag e Rang e GND V DD V
REF Input Capacitance Gain = 1 to 128 10 pF
REF Input Sampling Rate f s
f CLKIN /
64
MHz
DIGITAL INPUTS (DIN, SCLK,
CS, RESET)
Input High Voltage V
IH
2 V
V DD = 4.75V to 5.25V 0.8
Input Low Voltage V IL
V DD = 2.7V to 3.6V 0.4
V
DIN, CS, RESET 250
Input Hysteresis V HYST
SCLK 500
mV
Input Current I IN ±1 µA
Input Capacitance 5 pF