DS1050
5-Bit, Programmable, Pulse-
Width Modulator: 1kHz, 5kHz, 10kHz, and 25kHz
www.maxim-ic.com
FEATURES
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Single 5-bit, programmable, pulse-width
modulator (PWM)
Adjustable Duty Cycle: 0% to 100%
2.7V to 5.5V Operation
Standard Frequency Values:
1kHz, 5kHz, 10kHz, and 25kHz
2-Wire Addressable Interface
Packages: 8-Pin (150-mil) SOIC and 8-Pin
(118-mil)
mSOP
Operating Temperature: -40
o
C to +85
o
C
PIN ASSIGNMENT
SCL
SDA
A0
GND
1
2
3
4
8
7
6
5
V
CC
A1
A2
PWM
o
8-Pin 150-mil SOIC
8-Pin 118-mil
mSOP
ORDERING INFORMATION
DS1050Z-001
DS1050Z-005
DS1050Z-010
DS1050Z-025
DS1050U-001
DS1050U-005
DS1050U-010
DS1050U-025
1kHz
5kHz
10kHz
25kHz
1kHz
5kHz
10kHz
25kHz
8-Pin 150-mil SOIC
8-Pin 150-mil SOIC
8-Pin 150-mil SOIC
8-Pin 150 mil SOIC
8-Pin 118-mil
mSOP
8-Pin 118-mil
mSOP
8-Pin 118-mil
mSOP
8-Pin 118-mil µSOP
PIN DESCRIPTION
V
CC
PWM
O
A0, A1, A2
SDA
SCL
GND
- 2.7V to 5.5V Power Supply
- PWM Ouput
- Device Address
- Serial Data I/O
- Serial Clock Input
- Ground
DESCRIPTION
The DS1050 is a programmable, 5-bit, pulse-width modulator featuring a 2-wire addressable controlled
interface. The DS1050 operates from power supplies ranging from 2.7V up to 5.5V. The PWM output
provides a signal that swings from 0V to V
CC
. The DS1050 requires a typical operating current of 50mA
and a programmable shutdown supply current of 1mA.
Four standard PWM output frequencies are offered and include 1kHz, 5kHz, 10kHz, and 25kHz. The
2-wire addressable interface allows operation of multiple devices on a single 2-wire bus and provides
compatibility with other Dallas Semiconductor 2-wire devices such as real-time clocks (RTCs), digital
thermometers, and digital potentiometers.
The device is ideal for low-cost LCD contrast and/or brightness control, power supply voltage
adjustment, and battery charging or current adjustment. The DS1050 is offered in standard integrated
circuit packaging including the 8-pin (150-mil) SOIC and space-saving 8-pin (118-mil)
mSOP.
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072701
DALLAS [ DALLAS SEMICONDUCTOR ]
