AD7709 Analog Devices, AD7709 Datasheet - Page 3

• Manufacturer Part Number: AD7709
• Description: 16-Bit Sigma Delta ADC with Current Sources, Switchable Reference Inputs and I/O Port
• Manufacturer: Analog Devices

Specifications of AD7709

• Resolution (bits): 16bit
• # Chan: 4
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: (2Vref/PGA Gain) p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: SOP

SPECIFICATIONS
Parameter
ADC CHANNEL SPECIFICATION
ADC CHANNEL
ANALOG INPUTS
REFERENCE INPUTS
(REFIN1 and REFIN2)
See Notes on page 5.
REV. A
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 (PSR)
Differential Input Voltage Ranges
ADC Range Matching
Absolute AIN1–AIN4 Voltage Limits
AIN1–AIN4 Analog Input Current
Absolute AINCOM Voltage Limits
AINCOM 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
DC Input Current
DC Input Current Drift
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
3
2
2
2
2
2, 4
2, 4
2
1
2
(V
32.768 kHz Crystal; all specifications T
DD
2
= 2.7 V to 3.6 V or 4.75 V to 5.25 V, REFIN(+) = 2.5 V; REFIN(–) = GND; GND = 0 V; XTAL1/XTAL2 =
AD7709A, AD7709B
5.4
105
16
13
16
See Tables II to V
± 30
± 3
± 10
± 0.75
± 0.2
± 0.5
85
± 2
GND + 100 mV
V
± 1
± 5
GND – 30 mV
V
± 125
± 2
100
100
100
100
100
2.5
1
V
GND – 30 mV
V
0.5
± 0.01
100
100
110
110
110
±
DD
DD
DD
DD
1 024
.
– 100 mV
+ 30 mV
+ 30 mV
GAIN
¥
REFIN
–3–
Unit
Hz min
Hz max
Bits min
Bits p-p
Bits p-p
ppm of FSR max
mV typ
nV/∞C typ
LSB typ
% of FS typ
ppm/∞C typ
dB typ
V nom
mV typ
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 typ
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
MIN
to T
MAX
, unless otherwise noted.)
Test Conditions
0.732 ms Increments
20 Hz Update Rate
± 20 mV Range, 20 Hz Update Rate
± 2.56 V Range, 20 Hz Update Rate
Typically 2 ppm
B Grade, V
A Grade
Input Range = ± 2.56 V
100 dB typ on ± 20 mV Range
REFIN = REFIN(+) – REFIN(–)
GAIN = 1 to 128
Input Voltage = 19 mV on All Ranges
Pseudo-Differential Mode of Operation
Input Current Varies with Input Range
50 Hz ± 1 Hz, 16.65 Hz Update Rate, SF = 82
60 Hz ± 1 Hz, 20 Hz Update Rate, SF = 68
Input Range = ± 2.56 V, AIN = 1 V
110 dB typ on ± 20 mV Range
50 Hz ± 1 Hz, Range = ± 2.56 V, AIN = 1 V
60 Hz ± 1 Hz, Range = ± 2.56 V, AIN = 1 V
REFIN = REFIN(+) – REFIN(–)
50 Hz ± 1 Hz, SF = 82
60 Hz ± 1 Hz, SF = 68
Input Range = ± 2.56 V, AIN = 1 V
50 Hz ± 1 Hz, Range = 2.56 V, AIN = 1 V
60 Hz ± 1 Hz, Range = 2.56 V, AIN = 1 V
DD
= 4 V
FSR
=
2
¥
1 024
.
GAIN
AD7709
REFIN