OP213 데이터 시트보기 (PDF) - Analog Devices
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OP213 Datasheet PDF : 24 Pages
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OP113/OP213/OP413
VS+ = 5V 12V
R3
2.5kΩ
C1
0.1µF
R1
5kΩ
8
2–
R4
1/2
OP213 1
3+
4
100Ω
+
C2
1µF
VS+
OUTPUT
2
R2
5kΩ
Figure 46. False Ground Generator
LOW NOISE VOLTAGE REFERENCE
Few reference devices combine low noise and high output drive
capabilities. Figure 47 shows the OPx13 family used as a two-
pole active filter that band limits the noise of the 2.5 V reference.
Total noise measures 3 μV p-p.
5V
2
IN
OUT 6
REF43
GND
4
–
10µF
+
10kΩ
10kΩ
5V
8
2–
1/2
OP213
3+
+
4
C2
10µF
1
OUTPUT
2.5V
3µV p-p NOISE
Figure 47. Low Noise Voltage Reference
5 V ONLY STEREO DAC FOR MULTIMEDIA
The OPx13 family’s low noise and single supply capability are
ideally suited for stereo DAC audio reproduction or sound
synthesis applications such as multimedia systems. Figure 48
shows an 18-bit stereo DAC output setup that is powered from a
single 5 V supply. The low noise preserves the 18-bit dynamic
range of the AD1868. For DACs that operate on dual supplies,
the OPx13 family can also be powered from the same supplies.
5V SUPPLY
AD1868
1 VL 18-BIT
LL DAC
2
–
+
3
18-BIT
DL SERIAL
REG.
4
CK
VREF
VBL
16
15
14
VOL
13
DR
5
18-BIT
LR SERIAL
6
REG.
AGND 12
VREF
11
7 DGND
18-BIT
DAC
8
VBR
+ VOR
–
10
VS 9
7.68kΩ 9.76kΩ
+
330pF
7.68kΩ 9.76kΩ
+
330pF
3+ 8
1/2
OP213
2– 4
220µF
LEFT
1 +–
CHANNEL
OUTPUT
47kΩ
100pF
7.68kΩ
7.68kΩ
100pF
6–
1/2
OP213
5+
220µF RIGHT
7 +–
CHANNEL
OUTPUT
47kΩ
Figure 48. 5 V Only 18-Bit Stereo DAC
Rev. F | Page 16 of 24
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