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NTE870

Integrated Circuit Dual Operational Transconductance Amp

NTE Electronics 

NTE870

Integrated Circuit

Dual Operational Transconductance Amp

Description:

The NTE870 consists of two current controlled transconductance amplifiers each with differential in-

puts and a push–pull output. The two amplifiers share common supplies but otherwise operate inde-

pendently. Linearizing diodes are provided at the inputs to reduce distortion and allow higher input

levels resulting in a 10dB signal–to–noise improvement referenced to 0.5 percent THD. Controlled

impedance buffers are provided which are especially designed to complement the dynamic range of

the amplifiers.

Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)

Supply Voltage, V+/V– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36V or ±18V

Differential Input Voltage, VID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5V

Diode Bias Current, ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2mA

Amp Bias Current, IABC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2mA

Buffer Output Current, Io . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA

Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 570mW

DC Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V+ to V–

Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +75°C

Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C

Electrical Characteristics: (TA = +25°C, V+/V– = ±15V, IABC = 500µA unless otherwise specified)

Parameter

Symbol

Test Conditions

Min Typ Max Unit

Input Offset Voltage (VOS)

Input Offset Voltage

VOS Including Diodes

Input Offset Change

Input Bias Current

VIO

IABC = 5µA

Diode Base Current, ID = 500µA

5µA ≤ IABC ≤ 500µA

IB

TA = –20° to +75°C

–

0.4 5.0 mV

–

0.3 5.0 mV

–

0.5 5.0 mV

–

0.1

–

mV

–

0.4 5.0

µA

–

1.0 8.0

µA

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