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DS1851 Datasheet

  • DS1851

  • Dual Temperature-Controlled NV Digital-to-Analog Converters

  • 17頁

  • DALLAS   DALLAS

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DS1851
Dual Temperature-Controlled NV
Digital-to-Analog Converters
www.maxim-ic.com
FEATURES
摟
摟
摟
摟
摟
摟
摟
Two temperature-controlled 8-bit Digital-to-
Analog Converters (DACs)
DAC settings changeable every 4擄C
Access to temperature data and device
control through a 2-wire interface
Operates with +3.3V or +5V supplies
Packaging: 8-pin TSSOP
Operating temperature: -40潞C to +95潞C
Programming temperature: 0潞C to +70潞C
PIN ASSIGNMENTS
SDA
SCL
V
rg
GND
1
2
3
4
8
7
6
5
V
CC
V
rc
OutV
OutG
8-Pin TSSOP (173mil)
PIN DESCRIPTIONS
V
CC
GND
SDA
SCL
OutG
V
rg
OutV
V
rc
- +3.3V or +5V Power Supply
Input
- Ground
- 2-Wire Serial Data
Input/Output
- 2-Wire Serial Clock Input
- DAC Output with Respect to
Ground
- Reference Input from Ground
- DAC Output with Respect to
V
CC
- Reference Input from V
CC
ORDERING INFORMATION
DS1851E-010
8-pin 173mil TSSOP
DS1851E-010/T&R 8-pin Tape and Reel
TSSOP
DESCRIPTION
The DS1851 dual temperature-controlled nonvolatile (NV) DACs consists of two DACs, two EEPROM
look-up tables, and a direct-to-digital temperature sensor. Both of the DACs can be programmed with any
temperature coefficient, which means that any system temperature effects can be corrected without any
additional external devices. The DS1851 provides an ideal method for setting and temperature-
compensating bias voltages and currents in control applications using a minimal amount of external
circuitry.
The user-defined settings for both DACs are stored in two EEPROM look-up tables and can be accessed
over the industry-standard 2-wire serial bus, which consists of SDA and SCL pins. These look-up tables
can assign a unique output value to each DAC for every 4擄C increment over the -40擄C to +95擄C range.
The output of the digital temperature sensor is also available as a 12-bit, two鈥檚 complement value over the
serial bus.
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