AD7785BRUZ Analog Devices Inc, AD7785BRUZ Datasheet - Page 3

• Manufacturer Part Number: AD7785BRUZ
• Description: IC ADC 20BIT SIGMA-DELTA 16TSSOP
• Manufacturer: Analog Devices Inc

Specifications of AD7785BRUZ

• Data Interface: MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Bits: 20
• Sampling Rate (per Second): 470
• Number Of Converters: 1
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP (0.173", 4.40mm Width)
• Resolution (bits): 20bit
• Input Channel Type: Differential
• Supply Voltage Range - Analogue: 2.7V To 5.25V
• Supply Voltage Range - Digital: 2.7V To 5.25V
• Supply: RoHS Compliant
• Sampling Rate: 470Hz
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-AD7785EBZ - BOARD EVALUATION FOR AD7785
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SPECIFICATIONS
AV
Table 1.
Parameter
ADC CHANNEL
ANALOG INPUTS
Output Update Rate
No Missing Codes
Resolution
Output Noise and Update Rates
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
DD
Buffered Mode
In-Amp Active
Common-Mode Voltage, V
@ DC
@ 50 Hz, 60 Hz
@ 50 Hz, 60 Hz
Unbuffered Mode
Buffered Mode or In-Amp Active
Unbuffered Mode
Internal Clock
External Clock
= 2.7 V to 5.25 V; DV
Average Input Current
Average Input Current Drift
Average Input Current
Average Input Current Drift
@ 50 Hz, 60 Hz
@ 50 Hz
@ 60 Hz
@ 50 Hz, 60 Hz
@ 50 Hz
@ 60 Hz
3
3, 5
2
2
2
2
DD
4
2
2
= 2.7 V to 5.25 V; GND = 0 V; all specifications T
CM
4
AD7785B
4.17 to 470
20
±15
±1
±10
±10
±1
±3
100
±V
GND – 30 mV
AV
GND + 100 mV
AV
GND + 300 mV
AV
0.5
±1
±250
±2
±400
±50
65
80
90
80
94
90
100
100
100
DD
DD
DD
REF
/Gain
+ 30 mV
– 100 mV
– 1.1
1
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Unit
Bits min
μV typ
nV/°C typ
μV typ
ppm/°C typ
ppm/°C typ
dB min
V min
V max
V min
V max
V min
V max
V min
nA max
pA max
pA/°C typ
nA/V typ
pA/V/°C typ
dB min
dB min
dB min
dB min
dB min
dB min
dB min
dB min
dB min
Hz nom
ppm of FSR max
V nom
MIN
to T
MAX
, unless otherwise noted.
Test Conditions/Comments
See Output Noise and Resolution Specifications
See Output Noise and Resolution Specifications
Gain = 1 to 16, external reference
Gain = 32 to 128, external reference
AIN = 1 V/gain, gain ≥ 4, external reference
V
gain = 1 to 128
Gain = 1 or 2
Gain = 1 or 2
Gain = 4 to 128
V
Gain = 1 or 2, update rate < 100 Hz
Gain = 4 to 128, update rate < 100 Hz
Gain = 1 or 2
Input current varies with input voltage
80 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010
90 dB typ, 50 ± 1 Hz, FS[3:0] = 1001
100 dB typ, 60 ± 1 Hz, FS[3:0] = 1000
90 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010
100 dB typ, 50 ± 1 Hz, FS[3:0] = 1001
100 dB typ, 60 ± 1 Hz, FS[3:0] = 1000
AIN = 1 V/gain, gain ≥ 4
50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010
50 ± 1 Hz (FS[3:0] = 1001)
(FS[3:0] = 1000)
REF
CM
= (AIN(+) + AIN(−))/2, gain = 4 to 128
= REFIN(+) − REFIN(−) or internal reference,
6
6
, 60 ± 1 Hz
6
6
AD7785
6
6
6
6
6