AD7789 Analog Devices, AD7789 Datasheet - Page 3

• Manufacturer Part Number: AD7789
• Description: 24-Bit, Single-Channel, Ultra Low Power, Sigma Delta A/D Converter
• Manufacturer: Analog Devices

Specifications of AD7789

• Resolution (bits): 24bit
• # Chan: 1
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: SOP

SPECIFICATIONS
AD7789
V
Table 1.
Parameter
ADC CHANNEL SPECIFICATION
ADC CHANNEL
ANALOG INPUTS
REFERENCE INPUT
1
2
3
Temperature range:
Specification is not production tested but is supported by characterization data at initial product release.
Full-scale error applies to both positive and negative full scale and applies at the factory calibration conditions (V
DD
Output Update Rate
No Missing Codes
Resolution
Output Noise
Integral Nonlinearity
Offset Error
Offset Error Drift vs. Temperature
Full-Scale Error
Gain Drift vs. Temperature
Power Supply Rejection
Differential Input Voltage Ranges
Absolute AIN Voltage Limits
Analog Input Current
Normal-Mode Rejection
Common-Mode Rejection
REFIN Voltage
Reference Voltage Range
Absolute REFIN Voltage Limits
Average Reference Input Current
Average Reference Input Current Drift
Normal-Mode Rejection
Common-Mode Rejection
= 2.5 V to 5.25 V; REFIN(+) = 2.5 V; REFIN(−) = GND; GND = 0 V; all specifications T
Average Input Current
Average Input Current Drift
@ 50 Hz, 60 Hz
@ DC
@ 50 Hz, 60 Hz
@ 50 Hz, 60 Hz
@ DC
@ 50 Hz, 60 Hz
1
3
−
2
40°C to +105°C.
2
2
2
2
2
2
2
AD7789B
16.6
24
19
1.5
±15
±3
±10
±10
±0.5
90
±REFIN
GND − 30 mV
V
±400
±50
65
90
100
2.5
0.1
V
GND − 30 mV
V
0.5
±0.03
65
110
110
DD
DD
DD
+ 30 mV
+ 30 mV
Rev. B | Page 3 of 20
Unit
Hz nom
Bits min
Bits p-p
μV rms typ
ppm of FSR max
μV typ
nV/°C typ
μV typ
ppm/°C typ
dB min
V nom
V min
V max
nA/V typ
pA/V/°C typ
dB min
dB min
dB min
V nom
V min
V max
V min
V max
μA/V typ
nA/V/°C typ
dB min
dB typ
dB typ
MIN
DD
Test Conditions/Comments
100 dB typ, AIN = 1 V
REFIN = REFIN(+) − REFIN(−)
Input current varies with input voltage
50 Hz ± 1 Hz, 60 Hz ± 1 Hz
AIN = 1 V
100 dB typ
50 Hz ± 1 Hz, 60 Hz ± 1 Hz
REFIN = REFIN(+) − REFIN(−)
50 Hz ± 1 Hz, 60 Hz ± 1 Hz
AIN = 1 V
50 Hz ± 1 Hz, 60 Hz ± 1 Hz
= 4 V).
to T
MAX
, unless otherwise noted.
AD7788/AD7789