GENERAL DESCRIPTION

The ALD1726/ALD1726G is a monolithic precision CMOS ultra

micropower high slew-rate, high performance operational amplifier

intended for a broad range of analog applications using ±1V to ±5V dual

power supply systems, as well as +2V to +10V battery operated

systems. All device characteristics are specified for +5V single supply

or ±2.5V dual supply systems. Supply current is 40mA maximum at 5V

supply voltage.

The ALD1726/ALD1726G is designed to offer high performance for a

wide range of applications requiring very low power dissipation. It has

been developed specifically for the +5V single battery or ±1V to ±5V dual

battery user and offers the popular industry standard single operational

amplifier pin configuration.

Several important characteristics of the device make application easier

to implement at those voltages. First, the operational amplifier can

operate with rail to rail input and output voltages. This means the signal

input voltage and output voltage can be close to or equal to the positive

and negative supply voltages. This feature allows numerous analog

serial stages and flexibility in input signal bias levels. Second, the

device was designed to accommodate mixed applications where digital

and analog circuits may operate off the same power supply or battery.

Third, the output stage can typically drive up to 25pF capacitive and

20KW resistive loads. These features, combined with extremely low

input currents, high open loop voltage gain of 100V/mV, useful bandwidth

of 400KHz, a slew rate of 0.17V/ms, low offset voltage and

temperature drift, make the ALD1726/ALD1726G a versatile,

micropower operational amplifier.

The ALD1726/ALD1726G, designed and fabricated with silicon gate

CMOS technology, offers 0.01 pA typical input bias current. On chip

offset voltage trimming allows the device to be used without nulling in

most applications.

The ALD1726/ALD1726G is also designed to offer tolerance to overvoltage

input spikes of 300mV beyond supply rails, high open loop

voltage gain, and robust operation at temperature extremes. Additionally,

robust design and rigorous screening make this device especially

suitable for operation in temperature-extreme environments and rugged

conditions.

FEATURES & BENEFITS

• Lead Free - RoHS compatible

• Robust high-temperature operation

• 20mA supply current

• All parameters specified for +5V single supply

or ± 2.5V dual supply systems

• Rail to rail input and output voltage ranges

• No frequency compensation required -- unity

gain stable

• Extremely low input bias currents -- 0.1pA

typical (30pA max.)

• Ideal for high source impedance applications

• Dual power supply ±1.0V to ±5.0V operation

• Single power supply +2V to +10V operation

• High voltage gain -- typically 100V/mV @

±2.5V (100dB)

• Drive as low as a 20KW load

• Output short circuit protected

• Unity gain bandwidth of 0.4MHz

• Slew rate of 0.17V/ms

• Suitable for rugged, temperature-extreme

environments

APPLICATIONS

• Voltage amplifier

• Voltage follower/buffer

• Charge integrator

• Photodiode amplifier

• Data acquisition systems

• High performance portable instruments

• Biochemical probe interface

• Signal conditioning circuits

• Sensor and transducer amplifiers

• Low leakage amplifiers

• Precision Sample and Hold amplifiers

• Active filters

• Picoammeter

• Current to voltage converter