DS1050 Datasheet, PDF (1/17 Pages) Dallas Semiconductor – 5-Bit, Programmable, Pulse-Width Modulator: 1kHz, 5kHz, 10kHz, and 25kHz

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DS1050
5-Bit, Programmable, Pulse-
Width Modulator: 1kHz, 5kHz, 10kHz, and 25kHz
FEATURES
§ 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^oC to +85^oC
PIN ASSIGNMENT
SCL 1
8
VCC
SDA 2
7
A1
A0
3
6
A2
GND 4
5
PWMo
8-Pin 150-mil SOIC
8-Pin 118-mil mSOP
ORDERING INFORMATION
DS1050Z-001 1kHz
8-Pin 150-mil SOIC
DS1050Z-005 5kHz
8-Pin 150-mil SOIC
DS1050Z-010 10kHz 8-Pin 150-mil SOIC
DS1050Z-025 25kHz 8-Pin 150 mil SOIC
DS1050U-001
DS1050U-005
DS1050U-010
DS1050U-025
1kHz
5kHz
10kHz
25kHz
8-Pin 118-mil mSOP
8-Pin 118-mil mSOP
8-Pin 118-mil mSOP
8-Pin 118-mil µSOP
PIN DESCRIPTION
V_CC
- 2.7V to 5.5V Power Supply
PWM_O
- PWM Ouput
A0, A1, A2 - Device Address
SDA
- Serial Data I/O
SCL
- Serial Clock Input
GND
- 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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