Datasheet

Typical Performance Characteristics–AD7824/AD7828
REV. F
–5–
T
A
– AMBIENT TEMPERATURE – ⴗC
3
2
1
–100 150–50
t
CRD
– CONVERSION TIME – ␮s
050100
V
DD
= 5V
TPC 1. Conversion Time vs. Temperature
V
REF
– V
2.0
1.0
0
051
LINEARITY ERROR – LSB*
234
1.5
0.5
V
DD
= 5V
T
A
= 25ⴗC
*1LSB =
V
REF
256
TPC 2. Accuracy vs. V
REF
[V
REF
= V
REF
(+) – V
REF
(–)]
INPUT FREQUENCY – kHz
–36
–44
–52
51
SNR – dB
234
–40
–48
–38
–46
–42
–50
20 30 40 50 70 100710
ENCODE RATE = 400kHz
INPUT SIGNAL = 5V p-p
MEASUREMENT BANDWIDTH = 80kHz
TPC 3. Signal Noise Ratio vs. Input Frequency
T
A
– AMBIENT TEMPERATURE – ⴗC
14
12
10
–100 150–50
I
DD
– SUPPLY CURRENT – mA
050100
13
11
9
8
V
DD
= 5.25V
V
DD
= 4.75V
V
DD
= 5V
TPC 4. Power Supply Current vs. Temperature
(Not Including Reference Ladder)
t
P
– ns
2.0
1.0
0
300
LINEARITY ERROR – LSB
1.5
0.5
V
DD
= 5V
V
REF
= 5V
T
A
= 25
ⴗ
C
400 500 600 700 800 900
TPC 5. Accuracy vs. t
P
T
A
– AMBIENT TEMPERATURE – ⴗC
8
4
–100 150–50
OUTPUT CURRENT – mA
050100
10
6
2
0
I
SOURCE
, V
OUT
= 2.4V
V
DD
= 5V
I
SINK
, V
OUT
= 0.4V
TPC 6. Output Current vs. Temperature