AD7709 Analog Devices, AD7709 Datasheet - Page 10

• 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

AD7709–Typical Performance Characteristics
TPC 1. Typical Noise Plot on ± 20 mV Input Range
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32765
32764
3.0
2.5
2.0
1.5
1.0
0.5
0
1.0
TPC 2. RMS Noise vs. Reference Input
0
V
V
INPUT RANGE =
UPDATE RATE = 19.79Hz
T
DD
REF
A
100
= 25 C
1.5
= 5V
= 2.5V
200
2.0
2.56V RANGE
300
2.56V
READING NUMBER
2.5
400
V
INPUT RANGE =
UPDATE RATE = 19.79Hz
DD
V
REF
500
3.0
= 5V
– V
600
3.5
700
20mV RANGE
20mV
4.0
800
V
T
REF
A
= 25 C
4.5
900 1000
= 2.5V
5.0
–10–
700
600
500
400
300
200
100
0
OSCILLATOR
TPC 4. Typical Oscillator Power-Up
32766
V
T
DD
A
V
= 25 C
DD
= 5V
TPC 3. Noise Histogram
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CODE
TIME BASE = 100ms/DIV
TRACE 1 = TRACE 2 = 2V/DIV
32769
32770
32771
REV. A