Datasheet

AD5121/AD5141 Data Sheet
Rev. A | Page 16 of 32
–6
0
–50
–40
–3
0
–2
0
–1
0
0
10 100 1k 10k 100k 1
M
10M
GAIN (dB)
FREQUENCY (Hz)
AD51
21/
AD514
1
0x80 (0x40)
0x40 (0x20)
0x20 (0x10)
0x10 (0x08
)
0x8
(0x04
)
0x4 (
0x02)
0x2 (0x01)
0x1 (0x00)
0x0
0
10940-022
Figure 20. 10 kΩ Gain vs. Frequency vs. Code
10940-025
–100
–90
–80
–70
–60
–50
–40
20 200 2k 20k 200k
THD + N (dB)
FREQUENCY (Hz)
10
kΩ
100
kΩ
V
DD
/V
SS
=
±2.
5V
V
A
= 1
V rms
V
B
= GND
CO
DE =
HALF SCA
LE
NOISE FILTER = 22kH
z
Figure 21. Total Harmonic Distortion Plus Noise (THD + N) vs. Frequency
–100
–80
–60
–40
–20
0
20
10 100 1k
10k 100k
1M 10M
PHASE (Degrees)
FREQUENCY (Hz)
QUARTER SCALE
MIDSCALE
FULL-SCALE
V
DD
/V
SS
= ±2.5V
R
AB
= 10kΩ
10940-026
Figure 22. Normalized Phase Flatness vs. Frequency, R
AB
= 10 kΩ
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
GAI
N (dB)
FREQUENCY (Hz)
10 100 1k 10k 100k 1M
10
M
0x80 (0x40)
0x40 (0x20)
0x20 (0x10)
0x10 (0x08)
0x8 (0x04)
0x4 (0x02)
0x2 (0x01)
0x1 (0x00)
0x00
AD5121/AD514
1
10940-123
Figure 23. 100 kΩ Gain vs. Frequency vs. Code
10kΩ
100kΩ
–90
–80
–7
0
–60
–5
0
–4
0
–30
–20
–1
0
0
0.001 0.
01
0.1
1
THD + N (dB)
VOLTAGE (V rms)
V
DD
/V
SS
= ±2.5V
f
IN
= 1kHz
CODE = HALF SCALE
NOISE FILTER = 22kHz
10940-028
Figure 24. Total Harmonic Distortion Plus Noise (THD + N) vs. Amplitude
–80
–90
–70
–60
–50
–40
–30
–20
–10
0
10
10
100 1k
10k
100k
1M
PHASE (Degrees)
FREQUENCY (Hz)
QUARTER SCALE
MIDSCALE
FULL-SCALE
V
DD
/V
SS
= ±2.5V
R
AB
= 100kΩ
10940-029
Figure 25. Normalized Phase Flatness vs. Frequency, R
AB
= 100 kΩ