ALD2721PB Advanced Linear Devices Inc, ALD2721PB Datasheet

ALD2721PB

Manufacturer Part Number

ALD2721PB

Description

Op Amps High Precision

Manufacturer

Advanced Linear Devices Inc

Datasheet

1.ALD2721PB.pdf (10 pages)

Specifications of ALD2721PB

Number Of Channels

Voltage Gain Db

107.96 dB

Common Mode Rejection Ratio (min)

83 dB

Input Offset Voltage

0.15 mV

Operating Supply Voltage

3 V, 5, V, 9 V

Supply Current

0.4 mA

Maximum Power Dissipation

2 mW

Maximum Operating Temperature

+ 70 C

Mounting Style

Through Hole

Package / Case

PDIP-14

Maximum Dual Supply Voltage

+/- 5 V

Minimum Operating Temperature

0 C

Lead Free Status / Rohs Status

Current page: 1 of 10
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* Contact factory for industrial temperature range

KEY FEATURES

• EPAD ( Electrically Programmable Analog Device)

• User programmable V

• Computer-assisted trimming

• Rail-to-rail input/output

• Compatible with standard EPAD Programmer

• Each amplifier V

• High precision through in-system circuit trimming

• Reduces or eliminates V

• System level “calibration” capability

• Application Specific Programming mode

• In-System Programming mode

• Electrically programmable to compensate for

• Achieves 0.01pA input bias current and 35 V

• Low voltage operation

ORDERING INFORMATION

GENERAL DESCRIPTION

The ALD2721E/ALD2721 is a dual monolithic rail-to-rail precision CMOS

operational amplifier with integrated user programmable EPAD (Electri-

cally Programmable Analog Device) based offset voltage adjustment. The

ALD2721E/ALD2721 is a dual version of the ALD1721E/ALD1721 opera-

tional amplifier. Each ALD2721E/ALD2721 operational amplifier features

individual, user-programmable offset voltage trimming resulting in signifi-

cantly enhanced total system performance and user flexibility.

technology is an exclusive ALD design which has been refined for analog

applications where precision voltage trimming is necessary to achieve a

desired performance. It utilizes CMOS FETs as in-circuit elements for

trimming of offset voltage bias characteristics with the aid of a personal

computer under software control. Once programmed, the set parameters

are stored indefinitely. EPAD offers the circuit designer a convenient and

cost-effective trimming solution for achieving the very highest amplifier/

system performance.

The ALD2721E/ALD2721 dual operational amplifier features rail-to-rail

input and output voltage ranges, tolerance to overvoltage input spikes of

300mV beyond supply rails, capacitive loading up to 50pF, extremely low

input currents of 0.01pA typical, high open loop voltage gain, useful

bandwidth of 700KHz, slew rate of 0.7V/ s, and low typical supply current

of 200 A for both amplifiers.

external component tolerances

input offset voltage with micropower

-55 C to +125 C

14-Pin

CERDIP

Package

ALD2721E DB

ALD2721 DB

INEAR

DVANCED

EVICES,

Operating Temperature Range

DUAL EPAD™ MICROPOWER OPERATIONAL AMPLIFIER

can be trimmed to a different Vos level

NC.

0 C to +70 C

14-Pin

Small Outline

Package (SOIC)

ALD2721E SB

ALD2721 SB

trimmer

, PSRR, CMRR and TCV

0 C to +70 C

Plastic Dip

ALD2721E PB

ALD2721 PB

14-Pin

Package

errors

EPAD

BENEFITS

• Eliminates manual and elaborate

• Remote controlled automated trimming

• In-System Programming capability

• No external components

• No internal clocking noise source

• Simple and cost effective

• Small package size

• Extremely small total functional

• Low system implementation cost

• Micropower

APPLICATIONS

• Sensor interface circuits

• Transducer biasing circuits

• Capacitive and charge integration circuits

• Biochemical probe interface

• Signal conditioning

• Portable instruments

• High source impedance electrode

• Precision Sample and Hold amplifiers

• Precision current to voltage converter

• Error correction circuits

• Sensor compensation circuits

• Precision gain amplifiers

• Periodic In-system calibration

• System output level shifter

PIN CONFIGURATION

+IN

-IN

amplifiers

-IN

system trimming procedures

volume size

N/C

V -

DB, PB, SB PACKAGE

TOP VIEW

ALD2721E/ALD2721

OUT

V +

OUT

Related parts for ALD2721PB

ALD2721PB Summary of contents

Page 1

A DVANCED L INEAR D I EVICES, NC. DUAL EPAD™ MICROPOWER OPERATIONAL AMPLIFIER KEY FEATURES • EPAD ( Electrically Programmable Analog Device) • User programmable V trimmer OS • Computer-assisted trimming • Rail-to-rail input/output • Compatible with standard EPAD Programmer ...

Page 2

FUNCTIONAL DESCRIPTION The ALD2721E/ALD2721 utilizes EPADs as elements for trimming of offset voltage bias characteristics. Each ALD2721E/ALD2721 operational amplifier has a pair of EPAD-based circuits connected such that one circuit is used to adjust V in one direction and the ...

Page 3

ABSOLUTE MAXIMUM RATINGS + Supply voltage, V Differential input voltage range Power dissipation Operating temperature range Storage temperature range Lead temperature, 10 seconds OPERATING ELECTRICAL CHARACTERISTICS 2.5V unless otherwise specified A S Parameter ...

Page 4

OPERATING ELECTRICAL CHARACTERISTICS (cont' 2.5V unless otherwise specified A S Parameter Symbol Supply Current I S Power Dissipation P D Input Capacitance C IN Maximum Load Capacitance C L Equivalent Input Noise Voltage ...

Page 5

V = 2.5V - +125 C unless otherwise specified S A Parameter Initial Input offset Voltage Input Offset Current Input Bias Current Initial Power Supply Rejection Ratio 8 Initial Common Mode Rejection Ratio 8 Large Signal Voltage Gain ...

Page 6

TYPICAL PERFORMANCE CHARACTERISTICS OUTPUT VOLTAGE SWING AS A FUNCTION OF SUPPLY VOLTAGE +125 100K SUPPLY VOLTAGE (V) INPUT BIAS CURRENT AS ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS COMMON MODE INPUT VOLTAGE RANGE AS A FUNCTION OF SUPPLY VOLTAGE SUPPLY VOLTAGE (V) OPEN LOOP VOLTAGE GAIN AS A ...

Page 8

TWO EXAMPLES OF EQUIVALENT INPUT OFFSET VOLTAGE DUE TO 500 400 300 200 100 THREE EXAMPLES OF EQUIVALENT INPUT OFFSET VOLTAGE DUE TO CHANGE IN COMMON MODE VOLTAGE vs. COMMON MODE VOLTAGE 500 400 300 EXAMPLE B: ...

Page 9

APPLICATION SPECIFIC / IN-SYSTEM PROGRAMMING Examples of applications where accumulated total input offset voltage from various contributing sources is minimized under different sets of user-specified operating conditions 2500 2000 1500 V BUDGET AFTER OS 1000 EPAD PROGRAMMING 500 0 -500 ...

Page 10

DEFINITIONS AND DESIGN NOTES: 1. Initial Input Offset Voltage is the initial offset voltage of the ALD2721E/ALD2721 operational amplifier when shipped from the factory. The device has been pre-programmed and tested for programmability. 2. Offset Voltage Program Range is the ...

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