AD7787 Analog Devices, AD7787 Datasheet - Page 3

• Manufacturer Part Number: AD7787
• Description: Low Power, 2-Channel 24-Bit Sigma-Delta ADC
• Manufacturer: Analog Devices

Specifications of AD7787

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

SPECIFICATIONS
Temperature range is −40°C to +105°C. V
T
Table 1.
Parameter
ADC CHANNEL SPECIFICATION
ADC CHANNEL
ANALOG INPUTS
REFERENCE INPUT
MAX
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
Bipolar Input Voltage Range
Unipolar Voltage Range
Absolute AIN Voltage Limits
Analog Input Current
Absolute AIN Voltage Limits
Analog Input Current
Normal Mode Rejection
Common-Mode Rejection (AIN1)
REFIN Voltage
Reference Voltage Range
Average Reference Input Current
Average Reference Input Current Drift
Normal Mode Rejection
, unless otherwise noted.
Average Input Current
Average Input Current Drift
Average Input Current
Average Input Current Drift
@ 50 Hz, 60 Hz
@ 50 Hz
@ 60 Hz
@ DC
@ 50 Hz, 60 Hz
@ 50 Hz, 60 Hz
@ 50 Hz
@ 60 Hz
2
1
1
1
1
1
1
1
1, 3
DD
= 2.5 V to 5.25 V; REFIN = 2.5 V; GND = 0 V; CDIV1 = CDIV0 = 0; all specifications T
AD7787B
9.5
120
24
19.5
1.1
±15
±3
±10
±10
±0.5
90
±REFIN
0 to REFIN
GND + 100 mV
V
±1
±5
GND – 100 mV
V
±400
±50
65
80
80
90
100
2.5
0.1
V
0.5
±0.03
65
80
80
DD
DD
DD
– 100 mV
+ 30 mV
Rev. 0 | Page 3 of 20
Unit
Hz min nom
Hz max 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 nom
V min
V max
nA max
pA/°C typ
V min
V max
nA/V typ
pA/V/°C typ
dB min
dB min
dB min
dB min
dB min
V nom
V min
V max
µA/V typ
nA/V/°C typ
dB min
dB min
dB min
Test Conditions/Comments
Update rate ≤ 20 Hz.
9.5 Hz update rate.
3.5 ppm typ.
100 dB typ, AIN = 1 V.
Because AIN2 is single-ended, it can have a negative
voltage of 100 mV minimum (see Page 18).
Buffered mode.
Buffered mode.
Unbuffered mode.
Unbuffered mode. Current varies with input voltage.
73 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[2:0] = 100
90 dB typ, 50 ± 1 Hz, FS[2:0] = 101
90 dB typ, 60 ± 1 Hz, FS[2:0] = 011
AIN = 1 V.
100 dB typ.
50 ± 1 Hz (FS[2:0] = 101
73 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[2:0] = 100
90 dB typ, 50 ± 1 Hz, FS[2:0] = 101
90 dB typ, 60 ± 1 Hz, FS[2:0] = 011
4
), 60 ± 1 Hz (FS[2:0] = 011
4
4
4
4
.
.
.
.
AD7787
4
4
.
.
MIN
4
).
to