OP413 Analog Devices, OP413 Datasheet - Page 16

• Manufacturer Part Number: OP413
• Description: Low Noise, Low Drift Single-Supply Operational Amplifier (Quad)
• Manufacturer: Analog Devices

Specifications of OP413

• -3db Bandwidth: 3.4MHz
• Slew Rate: 1.2V/µs
• Vos: 275µV
• Ib: 600nA
• # Opamps Per Pkg: 4
• Input Noise (nv/rthz): 4.7nV/rtHz
• Vcc-vee: 4V to 36V
• Isy Per Amplifier: 3mA
• Packages: SOIC

OP113/OP213/OP413
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.
5kΩ
5kΩ
R1
R2
2
3
V
S
–
+
+ = 5V
OP213
Figure 46. False Ground Generator
1/2
8
4
12V
0.1µF
C1
1
2.5kΩ
1
2
3
4
5
6
7
8
R3
LL
CK
DR
LR
DGND
V
V
DL
B
L
R
100Ω
SERIAL
SERIAL
18-BIT
18-BIT
18-BIT
18-BIT
DAC
R4
DAC
REG.
REG.
AD1868
+
V
V
C2
1µF
REF
REF
+
–
–
+
AGND
V
V
S
2
V
V
+
O
O
V
B
R
OUTPUT
L
L
S
Figure 48. 5 V Only 18-Bit Stereo DAC
5V SUPPLY
16
15
14
13
12
11
10
9
330pF
330pF
Rev. F | Page 16 of 24
7.68kΩ
7.68kΩ
+
+
9.76kΩ
9.76kΩ
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.
REF43
GND
5V
IN
OUT
3
2
6
5
2
4
7.68kΩ
7.68kΩ
+
OP213
–
OP213
+
–
1/2
1/2
6
8
4
10kΩ
10µF
100pF
100pF
Figure 47. Low Noise Voltage Reference
+
–
1
7
10kΩ
220µF
+ –
+ –
220µF
47kΩ
47kΩ
+
C2
10µF
LEFT
CHANNEL
OUTPUT
RIGHT
CHANNEL
OUTPUT
2
3
–
+
OP213
1/2
5V
8
4
3µV p-p NOISE
1
OUTPUT
2.5V