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دیتاشیت - Dallas Semiconductor - Dual Temperature-Controlled NV Variable Resistor

شماره قطعه DS1847
شرح مفصل Dual Temperature-Controlled NV Variable Resistor
تولید کننده Dallas Semiconductor 
آرم Dallas Semiconductor 


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DS1847 شرح
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FEATURES
§ Two linear taper, temperature-controlled
variable resistors
§ DS1847-050
- One 50kW, 256 position
- One 10kW, 256 position
§ DS1847-010
- Two 10kW, 256 position
§ Resistor settings changeable every 2°C
§ Access to temperature data and device
control via a 2-wire interface
§ Operates from 3V or 5V supplies
§ Packaging: 14-pin TSSOP, 16-ball CSBGA
§ Operating temperature: -40ºC to +95ºC
§ Programming temperature: 0ºC to +70ºC
DS1847
Dual Temperature-Controlled
NV Variable Resistor
PIN ASSIGNMENT
SDA
SCL
A0
A1
A2
WP
GND
1
2
3
4
5
6
7
14 Vcc
13 H0
12 NC
11 H1
10 L1
9 NC
8 L0
14-Pin TSSOP (173-mil)
Top View
A
B
C
D
1234
16-Ball CSBGA (4mm x 4mm)
DESCRIPTION
The DS1847 Dual Temperature-Controlled Nonvolatile (NV) Variable Resistor consists of two 256-
position linear, variable resistors. The DS1847-050 consists of one 10kW and one 50kW, while the
DS1847-010 consists of two 10kW resistors; both incorporate a direct-to-digital temperature sensor. The
device provides an ideal method for setting and temperature-compensating bias voltages and currents in
control applications using a minimum of circuitry.
The variable resistors settings are stored in EEPROM memory and can be accessed over the industry
standard 2-wire serial bus. The value of each variable resistor is determined by a temperature-addressed
look-up table, which can assign a unique value to each resistor for every 2°C increment over the -40°C to
+95°C range. The output of the digital temperature sensor is also available as a 13-bit, 2’s complement
value over the serial bus. The interface I/O pins consist of SDA and SCL.
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