Datasheet

DS4420
I
2
C Programmable-Gain Amplifier
for Audio Applications
_____________________________________________________________________ 5
0
40
20
80
60
100
120
01051520
POWER-SUPPLY REJECTION RATIO
vs. GAIN SETTING
DS4420 toc04
GAIN SETTING
PSRR (dB)
1kHz
50Ω LOAD
20kHz
50Ω LOAD
0
-80
1000 10,000 100,000
COMMON-MODE FREQUENCY RESPONSE
SWEEP AT -11dB
-60
-70
DS4420 toc05
FREQUENCY (Hz)
CMRR (dB)
-40
-50
-30
-20
-10
NO LOAD
1000 100,000 1,000,000
GAIN vs. FREQUENCY RESPONSE
DS4420 toc06
FREQUENCY (Hz)
GAIN (dB)
10,000
30
-40
-30
-20
-10
0
20
10
50Ω LOAD
-2dB SETTING
-35dB SETTING
+25dB SETTING
-40
-20
-30
0
-10
20
10
30
GAIN vs. SETTING
DS4420 toc07
GAIN SETTING
GAIN (dB)
0 5 10 15 20
IN+ AND IN- SHORTED TOGETHER
ACROSS -20°C TO +70°C
WITH 50Ω LOAD, 1kΩ LOAD,
AND NO LOAD
-140
-100
-120
-60
-80
-20
-40
0
CCITT NOISE vs. GAIN SETTING
DS4420 toc08
GAIN SETTING
CCITT NOISE (dBV)
0 5 10 15 20
NO LOAD
0.018
0.000
10 1000100 10,000 100,000
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
0.004
0.002
DS4420 toc09
FREQUENCY (Hz)
THD+N (%)
0.008
0.006
0.012
0.010
0.014
0.016
WITH 50Ω LOAD
AND 1kΩ LOAD
1V
RMS
INPUT
-11dB SETTING
0.09
0.00
10 1000100 10,000 100,000
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
0.02
0.01
DS4420 toc10
FREQUENCY (Hz)
THD+N (%)
0.04
0.03
0.06
0.05
0.07
0.08
WITH 50Ω LOAD
AND 1kΩ LOAD
1V
RMS
INPUT
+10dB SETTING
-40
-30
-35
-15
-20
-25
-10
-5
5
0
10
2 4 6 8 10 12 14 16 18 20
TOTAL HARMONIC DISTORTION vs. V
OUT
DS4420 toc11
GAIN SETTING
V
OUT
(dB)
0.000
0.004
0.002
0.010
0.008
0.006
0.012
0.014
0.018
0.016
0.020
THD+N (%)
50Ω LOAD
1kHz 2V
RMS
INPUT
VOUT
THD+N
Typical Operating Characteristics (continued)
(T
A
= +25°C, V
CC
= AV
CC
= 5.0V, unless otherwise noted.)