GENERAL DESCRIPTION

The ALD1102 is a monolithic dual P-channel matched transistor pair

intended for a broad range of analog applications. These enhancement-

mode transistors are manufactured with Advanced Linear Devices' en-

hanced ACMOS silicon gate CMOS process.

The ALD1102 offers high input impedance and negative current tempera-

ture coefficient. The transistor pair is matched for minimum offset voltage

and differential thermal response, and it is designed for switching and

amplifying applications in +2V to +12V systems where low input bias

current, low input capacitance and fast switching speed are desired. Since

these are MOSFET devices, they feature very large (almost infinite) current

gain in a low frequency, or near DC operating environment. When used

with an ALD1101, a dual CMOS analog switch can be constructed. In

addition, the ALD1102 is intended as a building block for differential

amplifier input stages, transmission gates, and multiplexer applications.

The ALD1102 is suitable for use in precision applications which require

very high current gain, beta, such as current mirrors and current sources.

The high input impedance and the high DC current gain of the Field Effect

Transistors result in extremely low current loss through the control gate.

The DC current gain is limited by the gate input leakage current, which is

specified at 50pA at room temperature. For example, DC beta of the device

at a drain current of 5mA at 25

°C is = 5mA/50pA = 100,000,000.

FEATURES

• Low threshold voltage of 0.7V

• Low input capacitance

• Low Vos grades -- 2mV, 5mV, 10mV

Ω typical

• Low input and output leakage currents

• Enhancement-mode (normally off)

APPLICATIONS

• Precision current mirrors

• Precision current sources

• Analog switches

• Choppers

• Differential amplifier

input stage

• Voltage comparator

• Data converters

• Sample and Hold

• Analog inverter

DUAL P-CHANNEL MATCHED MOSFET PAIR

ALD1102A/ALD1102B

ALD1102

Operating Temperature Range*

-55

°C to +125°C0°C to +70°C0°C to +70°C

8-Pin

8-Pin

8-Pin

CERDIP

Plastic Dip

SOIC

Package

Package

Package

ALD1102A PA

ALD1102B PA

ALD1102 DA

ALD1102 PA

ALD1102 SA

* Contact factory for industrial temperature range.

ORDERING INFORMATION

PIN CONFIGURATION

1

2

3

4

8

7

6

5

NC

SUBSTRATE

TOP VIEW

DA, PA, SA PACKAGE

SOURCE 1 (1)

SUBSTRATE (8)

SOURCE 2 (7)

GATE 2 (6)

DRAIN 1 (3)

GATE 1 (2)

DRAIN 2 (5)

BLOCK DIAGRAM

© 1998 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com

© 1998 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com