ADS131M04-Q1
ZHCSOL7A –MARCH 2022 –REVISED AUGUST 2022
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6.5 Electrical Characteristics
minimum and maximum specifications apply from TA = –40°C to +125°C; typical specifications are at TA = 25°C; all
specifications are at AVDD = 3 V, DVDD = 3 V, fCLKIN = 8.192 MHz, data rate = 4 kSPS, all channels enabled, global-chop
mode disabled and gain = 1 (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
ANALOG INPUTS
Gain = 1, 2, or 4, VINP = VINN = 0 V,
IB = (IBP + IBN) / 2
Input bias current
Input bias current
0.6
0.2
IB
µA
Gain = 8, 16, 32, 64 or 128, VINP = VINN
0 V, IB = (IBP + IBN) / 2
=
Gain = 1, 2, or 4
300
kΩ
Zin
Differential input impedance
Gain = 8, 16, 32, 64, or 128
±1 (1)
µA/V
ADC CHARACTERISTICS
Resolution
24
Bits
Gain settings
1, 2, 4, 8, 16, 32, 64, 128
High-resolution mode, fCLKIN = 8.192 MHz
Low-power mode, fCLKIN = 4.096 MHz
Very-low-power mode, fCLKIN = 2.048 MHz
250
125
64k
fDATA
Data rate
32k SPS
16k
62.5
Measured from supplies at 90% to first
DRDY falling edge
Startup time
0.5
6
ms
ADC PERFORMANCE
ppm of
FSR
INL
Integral nonlinearity (best fit)
±175
±35
±15
300
200
4
Offset error (input referred) Global-chop mode, channel 0
µV
Global-chop mode, channels 1-3
Offset drift
nV/°C
Global-chop mode
1000 hours at 85°C
Offset error time drift
Gain error
μV
±0.1%
1
Gain drift
ppm/°C
ppm
Including internal reference
1000 hours at 85°C
At dc
8.5
400
100
94
Gain error time drift
Common-mode rejection
ratio
CMRR
PSRR
dB
fCM = 50 Hz or 60 Hz
AVDD at dc
75
DVDD at dc
88
Power-supply rejection ratio
Input-referred noise
dB
AVDD supply, fPS = 50 Hz or 60 Hz
DVDD supply, fPS = 50 Hz or 60 Hz
78
85
5.35
1.5
µVRMS
mVRMS
During fast-startup
Gain = 1
99
102
80
dB
Gain = 64
Dynamic range
Crosstalk
All other gain settings
fIN = 50 Hz or 60 Hz
See 表7-1
dB
dB
–120
fIN = 50 Hz or 60 Hz, gain = 1,
VIN = –0.5 dBFS, normalized
100
SNR
Signal-to-noise ratio
fIN = 50 Hz or 60 Hz, gain = 64,
VIN = –0.5 dBFS, normalized
79
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6
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