ald2331a Advanced Linear Devices Inc (ALD), ald2331a Datasheet

ald2331a

Manufacturer Part Number

ald2331a

Description

Dual Precision Cmos Voltage Comparator With Open Drain Output Driver

Manufacturer

Advanced Linear Devices Inc (ALD)

Datasheet

1.ALD2331A.pdf (8 pages)

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Download datasheet (74Kb)

FEATURES

• Fanout of 30LS TTL loads

• Guaranteed to drive 200Ω loads

• Low supply current of 55µA typical

• Pinout of LM193 industry standard voltage comparators

• Extremely low input bias currents -- typically 10pA

• Virtually eliminates source impedance effects

• Low operating supply voltage of 3V to 10V

• Single (+5V) and dual supply (±5V) operation

• High speed for both large and small level signals

• CMOS, NMOS and TTL compatible

• Wired-OR open drain outputs

• High output sink current -- typically 50mA

• Low supply current spike

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

GENERAL DESCRIPTION

The ALD2331A/ALD2331B/ALD2331 is a monolithic high performance

dual precision voltage comparator built with advanced silicon gate EPAD

CMOS technology intended for high precision analog applications. The

ALD2331A/ALD2331B/ALD2331 offers ultra-low input offset voltages

and currents at its input pre-amplifier, precision voltage comparator and

high-current output driver integrated on-chip, in one industry standard

pinout 8 Lead PDIP or SOIC package. Primary features include: very high

typical input impedance of 10

response time of 750ns with only 10mV input step signal; very low power

dissipation of 55µA per comparator; and single (+5V) or dual (±5V) power

supply operation; and 50mA open drain output drivers.

The input voltage range includes ground, making this comparator ideal for

low level signal detection with high source impedance. The outputs are

open-drain configurations, allowing maximum application flexibility, such as

wired-OR connection and various different output loads. An external pull-

up resistor is required for each output, although the value of the pull-up

resistor can vary over a wide range in order to suit the application needs.

The outputs can be connected to a higher external voltage than V

The ALD2331A/ALD2331B/ALD2331 is ideal for a great variety of precison

analog voltage comparator applications, especially low level signal detec-

tion circuits requiring low standby power, yet retaining high output current

capability as needed.

ORDERING INFORMATION

-- 300ns typical for TTL inputs

0°C to +70°C

8-Pin Small

Outline Package (SOIC)

ALD2331ASAL

ALD2331BSAL

ALD2331SAL

Operating Temperature Range *

INEAR

DVANCED

EVICES,

NC.

DUAL PRECISION CMOS VOLTAGE COMPARATOR

(“L” suffix for lead free version)

Ω; low input bias current of 10pA; fast

WITH OPEN DRAIN OUTPUT DRIVER

Dip Package

0°C to +70°C

8-PinPlastic

ALD2331APAL

ALD2331BPAL

ALD2331PAL

www.aldinc.com

APPLICATIONS

• Simple precision reference voltage setting

• High source impedance voltage

• MOSFET driver

• Dual limit window comparator

• Power supply voltage monitor

• Photo-detector sensor circuit

• Relay or LED driver

• Oscillators

• Battery operated instruments

• Remote signal detection

BENEFITS

• Simple precision reference voltage setting

• On-chip input pre-amplifier and output

• Precision voltage comparison without

• Eliminates need for second power supply

• Wide range of pull-up resistor values

PIN CONFIGURATION

BLOCK DIAGRAM

OUT

comparison circuits

buffers

pre-amplifier

NONINVERTING INPUT

+IN

GND

-IN

INVERTING INPUT

ALD2331A/ALD2331B/ALD2331

+IN

-IN

SAL, PAL PACKAGES

(2)

(3)

(6)

(5)

(8) V

(4) GND

(1) OUT

(7) OUT

+IN

OUT

-IN

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ald2331a Summary of contents

Page 1

... The outputs can be connected to a higher external voltage than V The ALD2331A/ALD2331B/ALD2331 is ideal for a great variety of precison analog voltage comparator applications, especially low level signal detec- tion circuits requiring low standby power, yet retaining high output current capability as needed ...

Page 2

... Leakage Current 2 Response Time Common Mode CMRR Rejection Ratio Power Supply PSRR Rejection Ratio 1 Notes: Consists of junction leakage currents 2 Sample test parameter ALD2331A/ALD2331B/ALD2331 2331A 2331B Typ Max Min Typ Max ±5 ±1.5 ± 110 180 110 180 ...

Page 3

... V No Load 160 Two Comparators 140 120 100 80 60 -55 - AMBIENT TEMPERATURE (°C) INPUT BIAS CURRENT vs. TEMPERATURE 1000 + V = +5V 100 -55 - AMBIENT TEMPERATURE ( ALD2331A/ALD2331B/ALD2331 0.5 V+ -0.5 -1.0 0.5 V- -0.5 +2.5 200 180 = +5V 160 140 120 100 100 125 0.5 0.4 0.3 0.2 0.1 0.0 75 ...

Page 4

... T = 125 -25 C 1.0 A 0.5 0 OUTPUT SINK CURRENT (mA) POWER SUPPLY REJECTION RATIO vs.TEMPERATURE 90.0 85.0 80.0 75.0 70.0 65.0 60.0 -55 - AMBIENT TEMPERATURE ( ALD2331A/ALD2331B/ALD2331 90.0 85.0 80.0 75.0 70.0 65.0 60.0 75 100 125 100 10.0 1 +5V 5 5.1KΩ L 4.0 3.0 2.0 1.0 0.0 -1.0 75 100 125 0 C) Advanced Linear Devices COMMON MODE REJECTION RATIO vs ...

Page 5

... V -1.0 0.0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 TIME (µS) PRECISION SINGLE SUPPLY VOLTAGE COMPARATOR WITH DIRECT RELAY DRIVER + VOLTAGE COMPARATOR WITH +/-5V SUPPLY AND +5V RELAY DRIVE + ALD2331A/ALD2331B/ALD2331 0.6 0.5 1mV 0 5.1KΩ 15pF L 0.3 Input Step 0.2 0 +5V A 0.0 3.0 TYPICAL APPLICATIONS 5V RELAY V REF RELAY V ...

Page 6

... V REF(HIGH REF(LOW) MINIMUM R = 1.5KΩ LOAD OUTPUT HIGH FOR V < REF(HIGH) AND > REF(LOW) ALD2331A/ALD2331B/ALD2331 TYPICAL APPLICATIONS (cont'd) VOLTAGE COMPARATOR WITH OUTPUT LEVEL SHIFT AND HIGH CURRENT LOAD DRIVER 15K V OUT + OUT 9KΩ 1KΩ ...

Page 7

... S (45° (45° ALD2331A/ALD2331B/ALD2331 SOIC-8 PACKAGE DRAWING 8 Pin Plastic SOIC Package E Dim D ø ø Advanced Linear Devices Millimeters Inches Min Max Min 1.75 0.053 1.35 0.25 0.004 0.10 0.45 0.014 0.35 0.25 0.007 0.18 5.00 0.185 4.69 4.05 0.140 3.50 1.27 BSC 0.050 BSC 6 ...

Page 8

... ø ALD2331A/ALD2331B/ALD2331 PDIP-8 PACKAGE DRAWING 8 Pin Plastic DIP Package Dim D S-8 ø Advanced Linear Devices Millimeters Inches Min Max Min 3.81 5.08 0.105 1.27 0.015 0.38 1.27 2.03 0.050 0.89 1.65 0.035 0.38 0.51 0.015 0.30 0.008 ...

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