ALD2321_10 datasheet, PDF - EEWORLD Datasheet

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ALD2321_10: DescriptionULTRA LOW VOS EPADÂ® DUAL CMOS ANALOG VOLTAGE COMPARATOR; File Size92KB，11 Pages; ManufacturerALD [Advanced Linear Devices]

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ULTRA LOW VOS EPADÂ® DUAL CMOS ANALOG VOLTAGE COMPARATOR

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DVANCED

INEAR

EVICES,

NC.

ALD2321A/ALD2321B/ALD2321

ULTRA LOW VOS EPAD

DUAL CMOS ANALOG VOLTAGE COMPARATOR

GENERAL DESCRIPTION

The ALD2321A/ALD2321B/ALD2321 is a monolithic Precision Dual Volt-

age 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-chip e-trim (EPAD

electronic-trimming) technology, flexible multiple 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 1mV can be resolved and detected reliably without requiring amplifica-

tion. Sensor or detector signals with signal power as low as 0.004pW (4 x

-15

Watt) can be readily detected.

Each voltage comparator has two complementary output pins, one for

Source Output (OUT

) and the other for Sink Output (OUT). This dual

complementary output allows maximum circuit design flexibility. The out-

puts 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

50mA. 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. The Source Output can source up to 2mA and can be used to drive

the base terminal of an external NPN bipolar device or the gate of a N-

channel MOSFET device. Alternatively, the two outputs, Source Output and

ORDERING INFORMATION

(“L” suffix for lead free version)

Operating Temperature Range *

0°C to +70°C

-55°C to +125°C

16-Pin

Small Outline

Package (SOIC)

ALD2321ASCL

ALD2321BSCL

ALD2321SCL

16-Pin

Plastic Dip

Package

ALD2321APCL

ALD2321BPCL

ALD2321PCL

16-Pin

CERDIP

Package

ALD2321ADC

ALD2321BDC

ALD2321DC

FEATURES

•

Ultra low signal power of 4fW detectable

Ultra low offset voltage of max. 0.2mV

Ultra low input bias currents of typ. 0.01pA

Low supply current of 110µA typical

Virtually eliminates source impedance effects

Low operating supply voltage of 4V 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

APPLICATIONS

•

Dual limit window comparator

Power supply voltage monitor

Photo-detector sensor circuit

Relay or LED driver

Oscillators

Battery operated instruments

Remote signal detection

PIN CONFIGURATION

OUT

-IN

+IN

GND

N/C

OUT

-IN

+IN

N/C

SCL, PCL, DC PACKAGES

*N/C pins are connected internally.

Do not connect externally.

* Contact factory for leaded (non-RoHS) or high temperature versions.

www.aldinc.com

ALD2321_10 Related Products

	ALD2321_10	ALD2321APCL	ALD2321ASCL	ALD2321BPCL	ALD2321BSCL	ALD2321PCL	ALD2321SCL
Description	ULTRA LOW VOS EPADÂ® DUAL CMOS ANALOG VOLTAGE COMPARATOR	ULTRA LOW VOS EPADÂ® DUAL CMOS ANALOG VOLTAGE COMPARATOR	ULTRA LOW VOS EPADÂ® DUAL CMOS ANALOG VOLTAGE COMPARATOR	ULTRA LOW VOS EPADÂ® DUAL CMOS ANALOG VOLTAGE COMPARATOR	ULTRA LOW VOS EPADÂ® DUAL CMOS ANALOG VOLTAGE COMPARATOR	ULTRA LOW VOS EPADÂ® DUAL CMOS ANALOG VOLTAGE COMPARATOR	ULTRA LOW VOS EPADÂ® DUAL CMOS ANALOG VOLTAGE COMPARATOR

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