Datasheet

AD7837/AD7847–Typical Performance Graphs
REV. C
–6–
FREQUENCY – Hz
GAIN – dB
10
0
10
4
–20
–10
–30
10
5
10
6
10
7
V
DD
= +15V
V
SS
= –15V
V
REF
= +20Vp–p
DAC CODE = 111...111
Figure 1. Frequency Response
V
DD
/V
SS
– Volts
ERROR – LSB
0.5
0.0
0
0.4
0.3
0.2
0.1
11 13 15 17
INL
DNL
V
REF
= 7.5V
Figure 4. Linearity vs. Power Supply
FREQUENCY – kHz
FEEDTHROUGH – dB
0.1 1 100
V
DD
= +15V
V
SS
= –15V
V
REF
= 20V p-p
DAC CODE = 000...000
–100
10 1000
–90
–80
–70
–60
–50
Figure 7. Multiplying Feedthrough
Error vs. Frequency
LOAD RESISTANCE – 
V
OUT
– Volts p–p
20
5
10
15
10
0
100 1k 10k
V
DD
= +15V
V
SS
= –15V
V
REF
= +20Vp–p @ 1kHz
DAC CODE = 111...111
25
Figure 2. Output Voltage Swing vs.
Resistive Load
FREQUENCY – Hz
NOISE SPECTRAL DENSITY – nV/ Hz
400
0.01
0
0.1 1 100
V
DD
= +15V
V
SS
= –15V
V
REF
= 0V
DAC CODE = 111...111
300
200
100
10
Figure 5. Noise Spectral Density vs.
Frequency
HORIZ 2s/DIV
VERT 2V/DIV
V
OUT
FULL SCALE
ZERO SCALE
Figure 8. Large Signal Pulse
Response
CODE
ERROR – LSB
0
–0.2
0.6
0.4
0.2
–0.6
–0.4
0
2048 4095
0
–0.2
0.6
0.4
0.2
–0.6
–0.4
V
DD
= +15V
V
SS
= –15V
DAC A
DAC B
Figure 3. DAC-to-DAC Linearity
Matching
FREQUENCY – kHz
THD – dB
0.1
100
110
–40
V
DD
= +15V
V
SS
= –15V
V
REF
= 6V rms
DAC CODE = 111...111
–50
–60
–70
–80
–90
–100
Figure 6. THD vs. Frequency
A1 –0.01V
2  s
200mV 50mV
B
L
w
Figure 9. Small Signal Pulse
Response