Electrical characteristics (continued) – Rainbow Electronics MX7705 User Manual
Page 3
MX7705
16-Bit, Low-Power, 2-Channel,
Sigma-Delta ADC
_______________________________________________________________________________________
3
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