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DS1847 Datasheet

  • DS1847

  • Dual Temperature-Controlled NV Variable Resistor

  • 102.62KB

  • Dallas   Dallas

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DS1847
Dual Temperature-Controlled
NV Variable Resistor
www.maxim-ic.com
FEATURES
搂
搂
搂
搂
搂
搂
搂
搂
搂
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掳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: -40潞C to +95潞C
Programming temperature: 0潞C to +70潞C
PIN ASSIGNMENT
SDA
SCL
A0
A1
A2
WP
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Vcc
H0
NC
H1
L1
NC
L0
14-Pin TSSOP (173-mil)
Top View
A
B
C
D
1
2
3
4
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掳C increment over the -40掳C to
+95掳C range. The output of the digital temperature sensor is also available as a 13-bit, 2鈥檚 complement
value over the serial bus. The interface I/O pins consist of SDA and SCL.
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081502

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