ald4704b Advanced Linear Devices Inc (ALD), ald4704b Datasheet

ald4704b

Manufacturer Part Number

ald4704b

Description

Quad Rail-to-rail Cmos Operational Amplifier

Manufacturer

Advanced Linear Devices Inc (ALD)

Datasheet

1.ALD4704B.pdf (6 pages)

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GENERAL DESCRIPTION

The ALD4704 is a quad CMOS monolithic operational amplifier with

MOSFET input that has rail-to-rail input and output voltage ranges. The

input voltage can be beyond positive power supply voltage V + or the

negative power supply voltage V - by up to 300mV. The output voltage

swings to within 60mV of either positive or negative power supply voltages

at rated load.

With high impedance load, the output voltage approaches to within 1mV

of the power supply rails. This device is designed as an alternative to the

popular J-FET input operational amplifiers in applications where lower

operating voltages, such as 9V battery or 3.25V to 6V power supplies

are being used. It offers high slew rate of 5V/ s at low operating power.

The ALD4704 is designed and manufactured with Advanced Linear

Devices' standard enhanced ACMOS silicon gate CMOS process for low

unit cost and exceptional reliability.

The rail-to-rail input and output feature of the ALD4704 expand signal

voltage range for a given operating supply voltage and allow numerous

analog serial stages to be implemented without losing operating voltage

margin. The output stage is designed to drive up to 10mA into 400pF

capacitive and 1.5K resistive loads at unity gain and up to 4000pF at a

gain of 5. Short circuit protection to either ground or the power supply rails

is at approximately 15mA clamp current. The output can both source and

sink 10mA into a load with symmetrical drive and is ideally suited for

applications where push-pull voltage drive is desired.

For each of the operational amplifier, the offset voltage is trimmed on-chip

to eliminate the need for external nulling in many applications. For

precision applications, the output is designed to settle to 0.1% in 2 s. For

large signal buffer applications, the operational amplifier can function as

an ultrahigh input impedance voltage follower/buffer that allows input

and output voltage swings from positive to negative supply voltages. This

feature is intended to greatly simplify systems design and eliminate higher

voltage power supplies in many applications.

ORDERING INFORMATION

* Contact factory for industrial temperature range

-55 C to +125 C

14-Pin

CERDIP

Package

ALD4704A DB

ALD4704B DB

ALD4704 DB

INEAR

DVANCED

EVICES,

Operating Temperature Range*

NC.

QUAD RAIL-TO-RAIL CMOS OPERATIONAL AMPLIFIER

0 C to +70 C

14-Pin

Small Outline

Package (SOIC)

ALD4704A SB

ALD4704B SB

ALD4704 SB

0 C to +70 C

14-Pin

Package

ALD4704A PB

ALD4704B PB

ALD4704 PB

Plastic Dip

• Symmetrical push-pull output drive

• Inputs can extend beyond supply rails by

• Outputs settle to 2mV of supply rails

• High capacitive load capability -- up to

• No frequency compensation required –

• Extremely low input bias currents -- 1.0pA

• Ideal for high source impedance applica-

• High voltage gain -- typically 100V/mV

• Output short circuit protected

• Unity gain bandwidth of 2.1MHz

FEATURES

• Rail-to-rail input and output voltage ranges

• 5.0V/ s slew rate

APPLICATIONS

• Voltage amplifier

• Voltage follower/buffer

• Charge integrator

• Photodiode amplifier

• Data acquisition systems

• High performance portable

• Signal conditioning circuits

• Low leakage amplifiers

• Active filters

• Sample/Hold amplifier

• Picoammeter

• Current to voltage converter

• Coaxial cable driver

• Capacitive sensor amplifier

• Piezoelectric transducer amplifier

PIN CONFIGURATION

300mV

4000pF

unity gain stable

typical (20pA max.)

tions

instruments

OUT

+IN

-IN

V +

DB, PB, SB Package

ALD4704A/ALD4704B

ALD4704

V-

OUT

-IN

+IN

OUT

-IN

Related parts for ald4704b

ald4704b Summary of contents

Page 1

... Sample/Hold amplifier • Picoammeter • Current to voltage converter • Coaxial cable driver • Capacitive sensor amplifier • Piezoelectric transducer amplifier PIN CONFIGURATION OUT +70 C 14-Pin Plastic Dip Package ALD4704A PB ALD4704B PB OUT ALD4704 PB ALD4704A/ALD4704B ALD4704 1 14 OUT -IN -IN ...

Page 2

... O V high 4.99 O Output Short I SC Circuit Current Supply I S Current Power P D Dissipation Input C IN Capacitance Bandwidth B W Slew Rate S R Rise time t r Overshoot Factor ALD4704A/ALD4704B ALD4704 - - DB package 4704A 4704B Typ Max Min Typ Max 6.0 3.25 6.0 3.25 12.0 6.5 12.0 1.0 2.0 1.5 3.0 1.0 15 1.0 15 240 240 1.0 20 1.0 20 ...

Page 3

... I B Current Power Supply PSRR 60 Rejection Ratio Common Mode CMRR 60 Rejection Ratio Large Signal Voltage Gain Output Voltage V low O Range V high 4.8 O ALD4704A/ALD4704B ALD4704 4704A 4704B Typ Max Min Typ Max Min 400 400 4000 4000 26 26 0.6 0.6 5.0 5.0 2.0 2.0 4704A DB 4704B DB Typ Max ...

Page 4

... AMBIENT TEMPERATURE ( C) ALD4704A/ALD4704B ALD4704 3. The input bias and offset currents are essentially input protection diode reverse bias leakage currents, and are typically less than 1pA at room temperature. This low input bias current assures that the analog signal from the source will not be distorted by input bias currents. For applications where source impedance is very high, it may be neces- sary to limit noise and hum pickup through proper shielding ...

Page 5

... AMBIENT TEMPERATURE ( C) OPEN LOOP VOLTAGE GAIN AS A FUNCTION OF LOAD RESISTANCE 1000 100 10K 100K LOAD RESISTANCE ( ) LARGE - SIGNAL TRANSIENT RESPONSE 5V/div 5V/div ALD4704A/ALD4704B ALD4704 = 5.0V S +100 +125 1000K ...

Page 6

... RC LOW PASS FILTER (RFI FILTER 0. Cutoff frequency = = 3.2kHz Gain = 10 Frequency roll-off 20dB/decade ALD4704A/ALD4704B ALD4704 TYPICAL APPLICATIONS 0 OUT 1. OUT PHOTODIODE C = 4000pF L 0 OUT 10K 10K 100K +9V V OUT ...

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