ALD2321A/ALD2321B

ALD2321

ORDERING INFORMATION

PIN CONFIGURATION

* Contact factory for industrial temperature range

© 2004 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com

*N/C pins are connected internally. Do not connect externally.

APPLICATIONS

* Low level signal detector

* Dual limit window comparator

* Power supply voltage monitor

* Photo-detector sensor circuit

* Relay or LED driver

* Oscillators

* Battery operated instruments

* Remote signal detection

Operating Temperature Range*

0

°C to +70°C

0

°C to +70°C

-55

°C to +125°C

16-pin

16-Pin

16-Pin

Small Outline Package

Plastic DIP Package

Ceramic DIP Package

(SOIC)

(PDIP)

(CDIP)

ALD2321ASC

ALD2321APC

ALD2321ADC

ALD2321BSC

ALD2321BPC

ALD2321BDC

ALD2321SC

ALD2321PC

ALD2321DC

GENERAL DESCRIPTION

The ALD2321A/ ALD2321B/ ALD2321 is a monolithic Precision Dual

Voltage Comparator, each having integrated dual complementary

output drivers. It is constructed using advanced silicon gate CMOS

technology. Key features of the ALD2321A/ ALD2321B/ ALD2321

include very high input impedance, very low offset voltage utilizing on-

output configurations and fast response time with small overdrive

voltage. It is designed for ultra low level signal detection from high

impedance sources. For many applications the ALD2321A/ ALD2321B/

ALD2321 can eliminate an input amplification stage, a precision input

bias stage, a signal level shift stage and an output buffer stage, and do

the entire job from low level input signal detection to high output driver

---- all on a single chip.

The input voltage includes ground, making this voltage comparator ideal

for single supply +5V or dual supply +/- 5V powered systems. For dual

supply applications, GND pin is connected to the most negative supply

instead of Ground (0.0V). The negative supply voltage can be at any

value between 0.0V and -5V. Each voltage comparator is individually

trimmed at the factory for minimum offset voltage at ground voltage

potential, making the ALD2321A/ ALD2321B/ ALD2321 at its best offset

voltage and ready to compare very low signal level voltages at or near

ground potential. Typically a signal less than 1 mV can be resolved and

detected reliably without requiring amplification. Sensor or detector

readily detected.

Each voltage comparator has two complementary output pins, one for

complementary output allows maximum circuit design flexibility. The

outputs can be used as Single-Ended Driver, Multiple WIRED-OR

Outputs, Push-Pull Outputs or Complementary Outputs. The Sink

Output can be used as an open drain output, which has current sink

capability of up to 50 mA. It can also be connected to an external voltage

higher or lower than V+, which provide level shift of the output swing

levels from other than V+ to GND.

PRODUCT FEATURES

* Ultra low signal power of 4 fW detectable

* Ultra low offset voltage of max. 0.2 mV

* Ultra low input bias currents of typ. 0.01pA

* Low supply current of 110

µA typical

* Virtually eliminates source impedance effects

* Low operating supply voltage of 3V to 10V

* Single +5V and dual supply

±5V operation

* High speed for both small and large level

signals 300ns typical for TTL inputs

* CMOS, NMOS and TTL compatible

* Each comparator has separate push and pull

outputs

* High output sink current - typically 50mA

* Low supply current spikes

* Fanout of 30 TTL loads

1

2

3

14

15

16

4

13

5

12

6

7

8

10

11

9

DC, PC, SC PACKAGE

GND

*