OP270 Analog Devices, OP270 Datasheet - Page 13

• Manufacturer Part Number: OP270
• Description: Low Noise Precision Dual Op Amp
• Manufacturer: Analog Devices

Specifications of OP270

• -3db Bandwidth: 5MHz
• Slew Rate: 2.4V/µs
• Vos: 50µV
• Ib: 15nA
• # Opamps Per Pkg: 2
• Input Noise (nv/rthz): 3.2nV/rtHz
• Vcc-vee: 9V to 36V
• Isy Per Amplifier: 3.25mA
• Packages: DIP,SOIC

For reference, typical source resistances of some signal sources are listed in Table 5.
Table 5. Typical Source Resistances
Device
Strain Gage
Magnetic Tapehead, Microphone
Magnetic Phonograph Cartridge
Linear Variable Differential Transformer
R1
5Ω
R2
5Ω
OP270
DUT
1.24kΩ
R3
200Ω
R4
OP27E
909Ω
R5
Figure 35. Peak-to-Peak Voltage Noise Test Circuit (0.1 Hz to 10 Hz)
<1500 Ω
Source Impedance
<500 Ω
<1500 Ω
<1500 Ω
2µF
C1
600Ω
R6
10kΩ
R8
D1, D2
1N4148
Rev. E | Page 13 of 20
OP27E
0.032µF
Comments
Typically used in low frequency applications.
Low I
direct coupling is used. OP270 I
Low I
applications. OP270 does not introduce any self-magnetization problems.
Used in rugged servo-feedback applications. The bandwidth of interest is
400 Hz to 5 kHz.
C2
306Ω
R9
B
B
is important to reduce self-magnetization problems in direct-coupled
is very important to reduce self-magnetization problems when
65.4kΩ
R10
65.4kΩ
0.22µF
R11
C3
0.22µF
C4
10kΩ
R12
B
can be disregarded.
OP42E
5.9kΩ
R13
4.99kΩ
R14
GAIN = 50,000
V
1µF
S
C5
= ±15V
e
OUT
OP270