Typical Performance Characteristics–AD7824/AD7828
3
14
t
CRD
– CONVERSION TIME – s
13
I
DD
– SUPPLY CURRENT – mA
12
V
DD
= 5V
11
V
DD
= 5.25V
2
10
V
DD
= 5V
9
V
DD
= 4.75V
1
–100
8
–100
–50
0
50
100
T
A
– AMBIENT TEMPERATURE – C
150
–50
0
50
100
T
A
– AMBIENT TEMPERATURE – C
150
TPC 1. Conversion Time vs. Temperature
TPC 4. Power Supply Current vs. Temperature
(Not Including Reference Ladder)
2.0
V
DD
= 5V
T
A
= 25 C
2.0
V
DD
= 5V
V
REF
= 5V
T
A
= 25 C
LINEARITY ERROR – LSB*
1.0
LINEARITY ERROR – LSB
0
V
REF
256
1
2
V
REF
– V
3
4
5
1.5
1.5
1.0
0.5
0.5
0
0
300
400
500
600
700
800
900
*1LSB
=
t
P
– ns
TPC 2. Accuracy vs. V
REF
[V
REF
= V
REF
(+) – V
REF
(–)]
TPC 5. Accuracy vs. t
P
–36
–38
–40
–42
SNR – dB
–44
–46
–48
–50
–52
ENCODE RATE = 400kHz
INPUT SIGNAL = 5V p-p
MEASUREMENT BANDWIDTH = 80kHz
10
V
DD
= 5V
8
OUTPUT CURRENT – mA
I
SOURCE
, V
OUT
= 2.4V
6
4
I
SINK
, V
OUT
= 0.4V
2
1
2
3
4 5 7
10
20 30 40 50 70
INPUT FREQUENCY – kHz
100
0
–100
–50
0
50
100
T
A
– AMBIENT TEMPERATURE – C
150
TPC 3. Signal Noise Ratio vs. Input Frequency
TPC 6. Output Current vs. Temperature
REV. F
–5–
AD [ ANALOG DEVICES ]
