ald2704a Advanced Linear Devices Inc (ALD), ald2704a Datasheet

ald2704a

Manufacturer Part Number

ald2704a

Description

Dual Rail-to-rail Cmos Operational Amplifier - Advanced Linear Devices

Manufacturer

Advanced Linear Devices Inc (ALD)

Datasheet

1.ALD2704A.pdf (6 pages)

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GENERAL DESCRIPTION

The ALD2704 is a dual monolithic operational amplifier with MOSFET

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

voltage range and output voltage range are very close to the positive and

negative power supply voltages. Typically 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 of the ALD2704 ap-

proaches within 1mV of the power supply rails. This device is designed

as an alternative to the popular J-FET input operational amplifier in

applications where lower operating voltages, such as 9V battery or 3.25V

to 6V power supplies are being used. The ALD2704 offers high slew rate

of 5V/ s. It is designed and manufactured with Advanced Linear Devices'

standard enhanced ACMOS silicon gate CMOS process, and it offers low

unit cost and exceptional reliability.

The rail-to-rail input and output feature of the ALD2704 expands signal

voltage range for a given operating supply voltage and allows 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

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

is at approximately 15mA clamp current. Due to complementary output

stage design, the output can 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. In

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

8-Pin

CERDIP

Package

ALD2704A DA

ALD2704B DA

ALD2704 DA

INEAR

DVANCED

EVICES,

Operating Temperature Range*

resistive loads at unity gain and up to 4000pF at a

NC.

DUAL RAIL-TO-RAIL CMOS OPERATIONAL AMPLIFIER

0 C to +70 C

8-Pin

Small Outline

Package (SOIC)

ALD2704A SA

ALD2704B SA

ALD2704 SA

0 C to +70 C

8-Pin

Plastic Dip

Package

ALD2704A PA

ALD2704B PA

ALD2704 PA

• High capacitive load capability -- up to 4000pF

• No frequency compensation required -- unity

• Extremely low input bias currents -- <1.0pA

• Ideal for high source impedance applications

• High voltage gain -- typically 100V/mV

• Output short circuit protected

• Unity gain bandwidth of 2.1MHz

PIN CONFIGURATION

FEATURES

• Rail-to-rail input and output voltage ranges

• Symmetrical push-pull output drives

• Output settles to 2mV of supply rails

• 5.0V/ s slew rate

APPLICATIONS

• Voltage amplifier

• Voltage follower/buffer

• Charge integrator

• Photodiode amplifier

• Data acquisition systems

• High performance portable instruments

• 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

gain stable

typical (20pA max.)

OUT

+IN

-IN

V -

DA, PA, SA PACKAGE

ALD2704A/ALD2704B

TOP VIEW

ALD2704

V +

OUT

-IN

+IN

Related parts for ald2704a

ald2704a 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 -IN 8-Pin Plastic Dip +IN Package ALD2704A PA ALD2704B PA ALD2704 PA ALD2704A/ALD2704B ALD2704 OUT ...

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 ALD2704A/ALD2704B ALD2704 - - DA package 2704A 2704B 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

... Current Input Bias I B Current Power Supply PSRR Rejection Ratio Common Mode CMRR Rejection Ratio Large Signal AV Voltage Gain Output Voltage V low O Range V high 4.8 O ALD2704A/ALD2704B ALD2704 2704A 2704B Typ Max Min Typ Max Min 400 400 4000 4000 26 26 0.6 0.6 5.0 5.0 2.0 2.0 2704ADA 2704BDA ...

Page 4

... AMBIENT TEMPERATURE ( C) ALD2704A/ALD2704B ALD2704 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 necessary to limit noise and hum pickup through proper shielding ...

Page 5

... OPEN LOOP VOLTAGE GAIN AS A FUNCTION OF LOAD RESISTANCE 1000 100 10K 100K LOAD RESISTANCE ( ) VOLTAGE NOISE DENSITY AS A FUNCTION OF FREQUENCY 150 125 100 100 1K 10K FREQUENCY (Hz) ALD2704A/ALD2704B ALD2704 = 5.0V S +75 +100 +125 1000K ...

Page 6

... RC LOW PASS FILTER (RFI FILTER 0. Cutoff frequency = = 3.2kHz Gain = 10 Frequency roll-off 20dB/decade ALD2704A/ALD2704B ALD2704 TYPICAL APPLICATIONS 0 OUT 1. OUT PHOTODIODE C = 4000pF L 0 OUT V IN 10K Low Frequency 10K Breakpoint ƒ ...

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