Datasheet

REV. A
AD7719
–11–
Typical Performance Characteristics–
READING NO.
8389600
8389400
8388000
0 1000100
CODE READ
200 300
8389200
400 500 600 700 800 900
8389000
8388800
8388600
8388400
8388200
AV
DD
= DV
DD
= 5V
INPUT RANGE = 20mV
REFIN1(+)–REFIN1(–) = 2.5V
UPDATE RATE = 19.79Hz
MAIN ADC IN BUFFERED MODE
RMS NOISE = 0.58V rms
T
A
= 25C
V
REF
= 2.5V
TPC 1. Typical Noise Plot on ±20 mV Input Range with
19.79 Hz Update Rate
8
7
0
8388039
8388721
8388687 8388657
8388615
8388579
8388547
8388499 8388449
8388382
8388754
8389110
8389033 8388985 8388941
8388906
8388874
8388841 8388805
8388779
6
5
4
3
2
1
9
TPC 2. Noise Distribution Histogram
2.5
0
1.0 3.02.52.01.5 3.5 5.04.54.0
2.0
1.5
1.0
0.5
3.0
V
REF
(V)
RMS NOISE (V)
20mV RANGE
2.56V RANGE
AV
DD
= DV
DD
= 5V
V
REF
= 2.5V
INPUT RANGE = 2.56V
UPDATE RATE = 19.79Hz
T
A
= 25C
TPC 3. RMS Noise vs. Reference Input
16
040302010 50 10090807060
24
22
20
18
26
UPDATE RATE (Hz)
NO MISSING CODES (Min)
110
TPC 4. No-Missing-Codes Performance
TEMPERATURE SENSOR ( C)
1400
1200
0
503010 20 40
HITS
800
600
400
200
1000
THE AMBIENT
TEMPERATURE VARIES
FROM 25C TO 30C
WHILE RECORDING
THE DATA FROM
THE DEVICES.
TPC 5. Temperature Sensor Accuracy
MAIN CAL ACC. @ 4V (V)
1200
0
200–20 –10 10
HITS
800
600
400
200
1000
–30
TPC 6. Full-Scale Error Distribution