AD7190 Datasheet, PDF (2/21 Pages) Analog Devices – 4.8 kHz Ultra-Low Noise 24-Bit Sigma-Delta ADC with PGA

AD7190
Preliminary Technical Data
SPECIFICATIONS
AVDD = 3 V to 5.25 V; DVDD = 2.7 V to 5.25 V; GND = 0 V; REFIN1(+) = AVDD ; REFIN1(-) = GND; MCLK = 4.9152 MHz; Sinc⁴ filter
selected; all specifications TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter¹
Output Update Rate
No Missing Codes²
Resolution
RMS Noise and Update Rates
Integral Nonlinearity
Offset Error³
Offset Error Drift vs. Temperature⁴
Offset Error Drift vs. Time
Full-Scale Error^{3, 5}
Gain Drift vs. Temperature⁴
Gain Drift vs. Time
Power Supply Rejection
ANALOG INPUTS
Differential Input Voltage Ranges
Absolute AIN Voltage Limits²
Unbuffered Mode
Buffered Mode
Analog Input Current
Buffered Mode
Input Current²
Input Current Drift
Unbuffered Mode
Input Current
Input Current Drift
Normal Mode Rejection²
@ 50 Hz, 60 Hz
@ 50 Hz
@ 60 Hz
Common-Mode Rejection
@ DC
@ 50 Hz, 60 Hz²
@ 50 Hz, 60 Hz²
REFERENCE INPUT
REFIN Voltage
AD7190B
4.7 to 4800
1.17 to 1200
24
See RMS Noise and
Resolution
Specifications
See RMS Noise and
Resolution
Specifications
±15
±100/Gain
±0.5
±150/Gain
±10
±5
25
±10
±1
10
100
Unit
Hz nom
Hz nom
Bits min
Test Conditions/Comments
Chop Disabled
Chop Enabled
FS > 1
ppm of FSR max
µV typ
µV typ
nV/°C typ
nV/°C typ
nV/°C typ
nV/1000 Hours typ
µV typ
ppm/°C typ
ppm/1000 Hours typ
dB min
Chop Disabled
Chop Enabled
Gain = 1 to 16. Chop Disabled
Gain = 32 to 128. Chop Disabled
Chop Enabled
VIN = 1 V/Gain. 120 dB typical.
± VREF/gain
± (AVDD – 1V)/gain
V nom
V min/max
VREF = REFIN(+) − REFIN(−) , gain = 1 to 128
gain > 1
GND − 50 mV
AVDD + 50 mV
GND + 200 mV
AVDD − 200 mV
V min
V max
V min
V max
±1
nA max
Gain = 1
±3
nA typ
Gain > 1
±2
pA/°C typ
±5
µA/V typ
Gain = 1. Input current varies with input voltage
±1
µA/V typ
Gain > 1.
±50
pA/V/°C typ
98
dB min
10 Hz Update Rate, 50 ± 1 Hz, 60 ± 1 Hz
TBD
dB min
50 Hz Update Rate, REJ60⁶ = 1, 50 ± 1 Hz, 60 ± 1 Hz
TBD
dB min
50 Hz Update Rate, 50 ± 1 Hz
TBD
dB min
60 Hz Update Rate, 60 ± 1 Hz
100
dB min
AIN = 1 V/gain
100
dB min
10 Hz Update Rate, 50 ± 1 Hz, 60 ± 1 Hz
100
dB min
50 ± 1 Hz (50 Hz Update Rate), 60 ± 1 Hz (60 Hz
Update Rate)
AVDD
V nom
REFIN = REFIN(+) − REFIN(−)
Rev.PrD 7/08 | Page 2