ald2722 Advanced Linear Devices Inc (ALD), ald2722 Datasheet

ald2722

Manufacturer Part Number

ald2722

Description

Dual Epad? Operational Amplifier

Manufacturer

Advanced Linear Devices Inc (ALD)

Datasheet

1.ALD2722.pdf (10 pages)

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Download datasheet (53Kb)

* Contact factory for industrial temperature range

KEY FEATURES

• 5V single supply operation

• 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 25 V

ORDERING INFORMATION

GENERAL DESCRIPTION

The ALD2722E/ALD2722 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

ALD2722E/ALD2722 is a dual version of the ALD1722E/ALD1722 opera-

tional amplifier. Each ALD2722E/ALD2722 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 ALD2722E/ALD2722 dual operational amplifier features rail-to-rail

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

300mV beyond supply rails, high capacitive loading up to 4000pF, ex-

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

useful bandwidth of 1.5MHz, slew rate of 1.9V/ s, and low typical supply

current of 2mA for both amplifiers.

external component tolerances

input offset voltage

-55 C to +125 C

14-Pin

CERDIP

Package

ALD2722E DB

ALD2722 DB

INEAR

DVANCED

EVICES,

Operating Temperature Range

can be trimmed to a different Vos level

NC.

0 C to +70 C

14-Pin

Small Outline

Package (SOIC)

ALD2722E SB

ALD2722 SB

trimmer

, PSRR, CMRR and TCV

DUAL EPAD™ OPERATIONAL AMPLIFIER

0 C to +70 C

Plastic Dip

ALD2722E PB

ALD2722 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

amplifiers

-IN

system trimming procedures

volume size

N/C

V -

DB, PB, SB PACKAGE

TOP VIEW

ALD2722E/ALD2722

OUT

V +

OUT

Related parts for ald2722

ald2722 Summary of contents

Page 1

... The ALD2722E/ALD2722 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 ALD2722E/ALD2722 is a dual version of the ALD1722E/ALD1722 opera- tional amplifier. Each ALD2722E/ALD2722 operational amplifier features individual, user-programmable offset voltage trimming resulting in signifi- cantly enhanced total system performance and user flexibility ...

Page 2

... EPAD adjustment is made after the ALD2722E has been inserted into a circuit board. In this case, the circuit design must provide for the ALD2722E to operate in both normal mode and in programming mode. One of the benefits of in- system programming is that not only the ALD2722E offset ...

Page 3

... Input Offset Voltage Drift Initial Power Supply Rejection Ratio 8 Initial Common Mode Rejection Ratio 8 Large Signal Voltage Gain Output Voltage Range Output Short Circuit Current * NOTES 1 through 9, see section titled "Definitions and Design Notes". ALD2722E/ALD2722 PB,SB package DB package 2722E Symbol Min Typ Max V S 2.0 5 ...

Page 4

... 2. Gain = 1 400 pF Gain = 1KHz 0.6 fA =10Hz 1.5 MHz 1 10K 0 10K =10K C L =50pF 50pF 140 100 Typ Max Unit Test Conditions 0.02 V/ 1000 hrs 2.5 V 0 ALD2722E/ALD2722 ...

Page 5

... 5.0V unless otherwise specified A S Parameter Initial Power Supply 8 Rejection Ratio Initial Common Mode 8 Rejection Ratio Large Signal Voltage Gain Output Voltage Range Bandwidth Slew Rate ALD2722E/ALD2722 2722E Symbol Min Typ Max 0 2 2.0 PSRR i 85 CMRR ...

Page 6

... OF SUPPLY VOLTAGE INPUTS GROUNDED OUTPUTS UNLOADED +25 C +80 C +125 SUPPLY VOLTAGE (V) OPEN LOOP VOLTAGE AS A FUNCTION OF FREQUENCY 100 1K 10K 100K FREQUENCY (Hz) ALD2722E/ALD2722 -55 C +25 C +125 C = 10K = 135 180 1M 10M ...

Page 7

... FUNCTION OF LOAD RESISTANCE 1000 100 10K LOAD RESISTANCE ( ) 100 EXAMPLE B: V OST 80 PROGRAMMING V OST -2500 ALD2722E/ALD2722 2. 1000K 100K DISTRIBUTION OF TOTAL INPUT OFFSET VOLTAGE BEFORE AND AFTER EPAD PROGRAMMING AFTER EPAD TARGET = -750 V -2000 ...

Page 8

... FOR A COMMON MODE VOLTAGE RANGE OF 0.5V COMMON MODE VOLTAGE RANGE OF 0.5V CMRR = 80dB -0.2 -0.1 0.1 -0.3 0.0 COMMON MODE VOLTAGE (V) Advanced Linear Devices EXAMPLE B: V EPAD OS PROGRAMMED +8V SUPPLY SUPPLY CMRR = 80dB EPAD PROGRAMMED = + EPAD OS PROGRAMMED AT COMMON MODE VOLTAGE OF 0.25V 0.2 0.3 0.4 0.5 ALD2722E/ALD2722 ...

Page 9

... V BUDGET BEFORE 1000 OS EPAD PROGRAMMING 500 0 -500 + -1000 -1500 V BUDGET AFTER OS -2000 EPAD PROGRAMMING -2500 EXAMPLE C ALD2722E/ALD2722 X X Device input V OS PSRR equivalent CMRR equivalent equivalent Noise equivalent V OS External Error equivalent V OS Advanced Linear Devices ...

Page 10

... In addition, optional decoupling capacitors of 1000pF or greater value can be added to VExx terminals. F. The ALD2722E/ALD2722 is designed for use in low voltage, micropower circuits. The maximum operating voltage during normal operation should remain below 10 Volts at all times. Care ...

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