1

LT1126/LT1127

Dual/Quad

Decompensated Low Noise,

High Speed Precision Op Amps

DESCRIPTIO

S

FEATURE

s

100% Tested Low Voltage Noise

2.7nV/

√Hz Typ

4.2nV/

√Hz Max

s

Slew Rate

11V/

µs Typ

s

Gain-Bandwidth Product

65MHz Typ

s

Offset Voltage, Prime Grade

70

µV Max

Low Grade

100

µV Max

s

High Voltage Gain

5 Million Min

s

Supply Current Per Amplifier

3.1mA Max

s

Common Mode Rejection

112dB Min

s

Power Supply Rejection

116dB Min

s

Available in 8-Pin SO Package

The LT1126 dual and LT1127 quad are high performance,

decompensated op amps that offer higher slew rate and

bandwidth than the LT1124 dual and the LT1125 quad

operational amplifiers. The enhanced AC performance is

available without degrading DC specs of the LT1124/

LT1125. Both LT1126/LT1127 are stable in a gain of 10 or

more.

In the design, processing, and testing of the device,

particular attention has been paid to the optimization of the

entire distribution of several key parameters. Slew rate,

gain-bandwidth, and 1kHz noise are 100% tested for each

individual amplifier. Consequently, the specifications of

even the lowest cost grades (the LT1126C and the LT1127C)

have been enhanced.

Power consumption of the dual LT1126 is less than one

half of two OP-37s. Low power and high performance in an

8-pin SO package makes the LT1126 a first choice for

surface mounted systems and where board space is

restricted.

Protected by U.S. patents 4,775,884 and 4,837,496.

S

APPLICATI

s

Two and Three Op Amp Instrumentation Amplifiers

s

Low Noise Signal Processing

s

Active Filters

s

Microvolt Accuracy Threshold Detection

s

Strain Gauge Amplifiers

s

Direct Coupled Audio Gain Stages

s

Tape Head Preamplifiers

s

Microphone Preamplifiers

s

Accelerometer Amplifiers

s

Infrared Detectors

Low Noise, Wide Bandwidth Instrumentation Amplifier

GAIN = 1000, BANDWIDTH = 480kHz

INPUT REFERRED NOISE = 4.5nV/ Hz AT 1kHz, 6

µV

+

–

1/4

LT1127

LT1126 • TA01

OUTPUT

1/4

LT1127

10k

620

6.2k

200

6.2k

10k

√

Ω

– INPUT

Ω

620

Ω

+ INPUT

1/4

LT1127

+

–

+

–

FREQUENCY (Hz)

3

10

30

100

0.1

10

100

1000

LT1126 • TA07

1

1.0

MAXIMUM

TYPICAL

V = 15V

T = 25°C

S

A

±

1/f CORNER

2.3Hz

Voltage Noise vs Frequency