OP295:  Dual Rail-to-Rail Operational Amplifiers

Rail-to-rail output swing combined with dc accuracy are the key features of the OP495 quad and OP295 dual CBCMOS operational amplifiers. By using a bipolar front end, lower noise and higher ...More

OP295:  Dual Rail-to-Rail Operational Amplifiers

Product Description

Rail-to-rail output swing combined with dc accuracy are the key features of the OP495 quad and OP295 dual CBCMOS operational amplifiers. By using a bipolar front end, lower noise and higher accuracy than that of CMOS designs has been achieved. Both input and output ranges include the negative supply, providing the user "zero-in/zero-out" capability. For users of 3.3 volt systems such as lithium batteries, the OP295/OP495 is specified for three volt operation.

Maximum offset voltage is specified at 300 µV for +5 volt tion, and the open-loop gain is a minimum of 1000 V/mV. This yields performance that can be used to implement high accuracy systems, even in single supply designs.

The ability to swing rail-to-rail and supply +15 mA to the load the OP295/OP495 an ideal driver for power transistors and "H" bridges. This allows designs to achieve higher efficiencies and to transfer more power to the load than previously possible without the use of discrete components. For applications that require driving inductive loads, such as transformers, increases in efficiency are also possible. Stability while driving capacitive loads is another benefit of this design over CMOS rail-to-rail amplifiers. This is useful for driving coax cable or large FET transistors. The OP295/OP495 is stable with loads in excess of 300 pF.

The OP295 and OP495 are specified over the extended industrial (-40°C to +125°C) temperature range. OP295s are available in 8-pin plastic and ceramic DIP plus SO-8 surface mount packages. OP495s are available in 14-pin plastic and SO-16 surface mount packages. Contact your local sales office for MIL-STD-883 data sheet.

Features

  • Rail-to-Rail Output Swing
  • Single-Supply Operation: 3 V to 36 V
  • Low Offset Voltage: 300 mV
  • Gain Bandwidth Product: 75 kHz
  • High Open-Loop Gain: 1,000 V/mV
  • Unity-Gain Stable
  • Low Supply Current/Per
    Amplifier: 150 µA max

Diagrams

OP295 Diagram
Pin Configuration Diagram for OP295

Specifications

-3dB Bandwidth 85kHz
Slew Rate 30mV/µs
Vos 300µV
Ib 20nA
Input Noise (nV/rtHz) 45nV/rtHz
Vcc-Vee Supply (V) 3 to 36
Iq per Amplifier (max) 175µA
# OpAmps per Pkg 2
Operating Temp Range -40 to +125
Packages DIP,SOIC

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Part# Small Signal Bandwidth Slew Rate Vos Ib V Noise Density Amplifiers Per Package Widest Temp Range (°C)
OP295 85KHz 30mV/µs 300µV 20nA 45nV/rtHz 2 -40 to +125
AD8607 400KHz 100mV/µs 12µV 200fA 22nV/rtHz 2 -40 to +125
OP296 450KHz 300mV/µs 35µV 10nA 26nV/rtHz 2 -40 to +125
AD8667 520KHz 260mV/µs 30µV 300fA 21nV/rtHz 2 -40 to +125
OP2177 1.3MHz 700mV/µs 15µV 500pA 7.9nV/rtHz 2 -40 to +125
AD8552 1.5MHz 400mV/µs 1µV 10pA 42nV/rtHz 2 -40 to +125
AD8629 2.5MHz 1V/µs 1µV 30pA 22nV/rtHz 2 -40 to +125