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: 3 V to 36 V

– Low maximum input offset voltage: ±3 mV

(25°C) and ±4 mV (full temperature)

– Gain bandwidth: 1.2 MHz

– Total supply current: 600 μA

– EMI rejection: integrated RF and EMI filter

– Temperature range: -40°C to 125°C

• Improved specifications of B version reference:

– Fixed 2.5-V reference

– Tight tolerance maximum of 0.4% (25°C) and

0.8% (full temperature)

– Wide sink-current range:

0.5 mA (typical) to 100 mA

2 Applications

• Battery chargers

• Switch-mode power supplies

• Linear voltage regulation

• Data-acquisition systems

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 both switch-mode and linear

power supplies. OP AMP1 has its non-inverting input

internally tied to a fixed 2.5-V reference, while OP

AMP2 is independent, with both inputs uncommitted.

The upgraded TL103WB features improvements such

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

current (300 μA) and tighter voltage regulation.

This regulation can be achieved through low offset

voltages for both operational amplifiers (0.3 mV

typical) and tight tolerances for the voltage reference

(0.4% at 25°C and 0.8% over operating temperature

range).

The TL103WB has a widened temperature range of

–40°C to 125°C.

Device Information

PART NUMBER

CHANNEL COUNT

PACKAGE(1)

PACKAGE SIZE(3)

TL103W

TL103WA

TL103WB

Dual + Reference

D (SOIC, 8)(2)

4.9 mm × 6 mm

DDF (SOT-23, 8) (2)

2.9 mm × 2.8 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

(2)

This package is preview only.

(3)

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

Isolator

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

SLOS437N – APRIL 2004 – REVISED AUGUST 2023

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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION

DATA.