AD7783 Analog Devices, AD7783 Datasheet - Page 2

• Manufacturer Part Number: AD7783
• Description: Single-Channel, Read-Only, Pin-Configured, 24-bit Sigma-Delta A/D Converter with Switchable Current Sources
• Manufacturer: Analog Devices

Specifications of AD7783

• Resolution (bits): 24bit
• # Chan: 1
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Bip
• Ain Range: 0.32 V p-p,5.12 V p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: SOP

AD7783–SPECIFICATIONS
Parameter
ADC CHANNEL SPECIFICATION
ADC CHANNEL
ANALOG INPUTS
REFERENCE INPUT
EXCITATION CURRENT SOURCES
(IEXC1, IEXC2)
GND = 0 V; XTAL1/XTAL2 = 32.768 kHz Crystal; all specifications T
Output Update Rate
No Missing Codes
Resolution
Output Noise
Integral Nonlinearity
Offset Error
Offset Error Drift versus Temperature
Full-Scale Error
Gain Drift versus Temperature
Power Supply Rejection (PSR)
Differential Input Voltage Ranges
ADC Range Matching
Absolute AIN Voltage Limits
Analog Input Current
Normal-Mode Rejection
Common-Mode Rejection
REFIN Voltage
REFIN Voltage Range
Absolute REFIN Voltage Limits
Average Reference Input Current
Average Reference Input Current Drift
Normal-Mode Rejection
Common-Mode Rejection
Output Current
Initial Tolerance at 25∞C
Drift
Initial Current Matching at 25∞C
Drift Matching
Line Regulation
Load Regulation
Output Compliance
DC Input Current
DC Input Current Drift
@ 50 Hz
@ 60 Hz
@ DC
@ 50 Hz
@ 60 Hz
@ 50 Hz
@ 60 Hz
@ DC
@ 50 Hz
@ 60 Hz
2
2
2
2
2
2, 3
2, 3
2
AD7783B
19.79
24
16
18
See Table I
± 10
± 3
± 10
± 10
± 0.5
100
85
± 160
± 2.56
± 2
GND + 100 mV
V
± 1
± 5
60
94
105
100
100
2.5
1
V
GND – 30 mV
V
0.5
± 0.01
60
94
100
110
110
200
± 10
200
± 2.5
20
2.5
300
V
GND – 30 mV
DD
DD
DD
DD
– 100 mV
+ 30 mV
– 0.6
1
(V
DD
= 2.7 V to 3.6 V or 4.75 V to 5.25 V, REFIN(+) = 2.5 V; REFIN(–) = GND;
MIN
to T
–2–
Unit
Hz nom
Bits min
Bits p-p
Bits p-p
ppm of FSR max
mV typ
nV/∞C typ
mV typ
ppm/∞C typ
dB typ
dB typ
mV nom
V nom
mV typ
V min
V max
nA max
pA/∞C typ
dB min
dB min
dB min
dB min
dB min
V nom
V min
V max
V min
V max
mA/V typ
nA/V/∞C typ
dB min
dB min
dB typ
dB typ
dB typ
mA
% typ
ppm/∞C typ
% max
ppm/∞C typ
mA/V max
nA/V typ
V max
V min
MAX
, unless otherwise noted.)
Test Conditions
± 160 mV Range, RANGE = 0
± 2.56 V Range, RANGE = 1
Typically 2 ppm,
AIN(+) = AIN(–) = 2.5 V
V
Input Range = ± 160 mV, V
Input Range = ± 2.56 V, V
Range = 0
Range = 1
Input Voltage = 159 mV on Both Ranges
50 Hz ± 1 Hz
60 Hz ± 1 Hz
Input Range = ± 160 mV, V
125 dB typ,
110 dB typ when Input Range = ± 2.56 V
50 Hz ± 1 Hz
60 Hz ± 1 Hz
REFIN = REFIN(+) – REFIN(–)
50 Hz ± 1 Hz
60 Hz ± 1 Hz
Input Range = ± 160 mV, V
50 Hz ± 1 Hz
60 Hz ± 1 Hz
No Load
V
DD
DD
= 3 V
= 5 V ± 5%. Typically 1.25 mA/V.
FSR
=
2 1 024
¥
IN
IN
IN
IN
.
= 1 V
Gain
= 1/16 V
= 1/16 V
= 1/16 V
REFIN
REV. C