Typical Performance Characteristics–AD7824/AD7828
REV. F
–5–
TA – AMBIENT TEMPERATURE – C
3
2
1
–100
150
–50
t CRD
–
CONVERSION
TIME
–
s
050
100
VDD = 5V
TPC 1. Conversion Time vs. Temperature
VREF – V
2.0
1.0
0
05
1
LINEARITY
ERR
OR
–
LSB
*
234
1.5
0.5
VDD = 5V
TA = 25 C
*1LSB =
VREF
256
TPC 2. Accuracy vs. VREF [VREF = VREF (+) – VREF (–)]
INPUT FREQUENCY – kHz
–36
–44
–52
5
1
SNR
–
dB
23
4
–40
–48
–38
–46
–42
–50
20
30 40 50 70
100
710
ENCODE RATE = 400kHz
INPUT SIGNAL = 5V p-p
MEASUREMENT BANDWIDTH = 80kHz
TPC 3. Signal Noise Ratio vs. Input Frequency
TA – AMBIENT TEMPERATURE – C
14
12
10
–100
150
–50
I DD
–
SUPPL
Y
CURRENT
–
mA
050
100
13
11
9
8
VDD = 5.25V
VDD = 4.75V
VDD
TPC 4. Power Supply Current vs. Temperature
(Not Including Reference Ladder)
tP – ns
2.0
1.0
0
300
LINEARITY
ERR
OR
–
LSB
1.5
0.5
VDD = 5V
VREF = 5V
TA = 25 C
400
500
600
700
800
900
TPC 5. Accuracy vs. tP
TA – AMBIENT TEMPERATURE – C
8
4
–100
150
–50
OUTPUT
CURRENT
–
mA
050
100
10
6
2
0
ISOURCE, V OUT = 2.4V
VDD = 5V
ISINK, VOUT = 0.4V
TPC 6. Output Current vs. Temperature