TL103Wx Dual Operational Amplifiers With Internal Reference

1 Features

• New TL103WB, a pin-compatible upgrade to the

TL103W and TL103WA

• Improved specifications of B version amplifiers:

– Supply range: 3V to 36V

– Low maximum input offset voltage: ±2mV

(25°C) and ±2.5mV (full temperature)

– Gain bandwidth: 1.2MHz

– Total supply current: 550μA

– EMI rejection: integrated RF and EMI filter

– Temperature range: –40°C to 125°C

• Improved specifications of B version reference:

– Fixed 2.5V reference

– Tight tolerance maximum of 0.44% (25°C) and

1.04% (full temperature)

– Wide sink-current range:

0.2mA (typical) to 100mA

2 Applications

• Battery chargers

• Switch-mode power supplies

• Linear voltage regulation

• Data-acquisition systems

• Precision constant current sink

3 Description

The TL103Wx devices combine the building blocks

of a dual operational amplifier and a fixed voltage

reference – both of which are often used in the control

circuitry of switch-mode and linear power supplies.

OP AMP1 has the noninverting input internally tied

to a fixed 2.5V reference, while OP AMP2 is

independent, with both inputs uncommitted.

The upgraded TL103WB features improvements

such as a wider supply range (up to 36V), lower

supply current (275μA/amp) and tighter voltage

regulation. This regulation can be achieved through

low offset voltages for both operational amplifiers

(0.3mV typical) and tight tolerances for the voltage

reference (0.44% at 25°C and 1.04% over operating

temperature range).

The TL103WB has a widened temperature range of

–40°C to 125°C.

Package Information

PART NUMBER

CHANNEL COUNT

PACKAGE(1)

PACKAGE SIZE(2)

TL103W

TL103WA

Dual + Reference

D (SOIC, 8)

4.9mm × 6mm

TL103WB

D (SOIC, 8)

4.9mm × 6mm

DDF (SOT-23, 8)

2.9mm × 2.8mm

(1)

For more information, see Section 10.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

SMPS

_

+

OP AMP2

_

+

OP AMP1

TL103WB

Current

Sense

AC

Line

Opto

Emulator

Battery

R6

R3

R4

R5

R8

R2

R1

R7

R9

Constant Voltage Control

Constant Current Control

2.5 V

VREF

Typical Application Circuit

TL103W, TL103WA, TL103WB

SLOS437R – APRIL 2004 – REVISED APRIL 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.