DS1847E-010

DS1847E-010 Datasheet

§ DS1847-050 - One 50kW, 256 position - One 10kW, 256 position

Part	Datasheet
DS1847E-010	DS1847E-010 (pdf)

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§ 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 1 SCL 2 A0 3 A1 4 A2 5 WP 6 GND 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 The DS1847 Dual Temperature-Controlled Nonvolatile NV Variable Resistor consists of two 256position 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. 1 of 17 011806 PIN DESCRIPTIONS Name TSSOP BGA VCC 14 GND 7 SDA 1 SCL 2 H0 13 H1 11 L1 10 NC 12 DS1847 Description Power Supply Terminal. The DS1847 will support supply voltages ranging from +3.0V to +5.5V. Ground Terminal. 2-Wire Serial Data Interface. The serial data pin is for serial data transfer to and from the DS1847. The pin is open drain and may be wire-ORed with other open drain or open collector interfaces. 2-Wire Serial Clock Input. The serial clock input is used to clock data into the DS1847 on rising edges and clock data out on falling edges. Write Protect Input. If open or set to logic 1, all memory, control registers, and Look-up tables are write protected. If set to a logic 0, the device is not write protected and can be written to. The WP pin is pulled high internally. Address Input. Pins A0, A1, and A2 are used to specify the address of each DS1847 when used in a multi-dropped configuration. Address Input. Address Input. High terminal of Resistor For both resistors, it is not required that the high terminal be connected to a potential greater than the low terminal. Voltage applied to the high terminal of each resistor cannot exceed VCC, or go below ground. High terminal of Resistor Low terminal of Resistor For both resistors, it is not required that the low terminal be connected to a potential less than the high terminal. Voltage applied to the low terminal of each resistor cannot exceed VCC, or go below ground. Low terminal of Resistor No Connect. No Connect. No Connect. No Connect. 2 of 17 DS1847 BLOCK DIAGRAM Figure 1 WP A0 A1 A2 SDA SCL VCC Gnd 2-Wire Interface 72x8 bit EEPROM ORDERING INFORMATION 10000 TEMPCO vs. RESISTANCE 50K RESISTOR 1100 1000 500 0 10000 20000 30000 40000 50000 RESISTANCE OHMS 16 of 17 ORDERING NUMBER PACKAGE OPERATING TEMPERATURE DS1847E-010 DS1847E-050 DS1847E-010/T&R DS1847E-050/T&R DS1847B-010 DS1847B-050 DS1847B-010+ DS1847B-010+T&R DS1847B-010/T&R DS1847B-050+ DS1847B-050+T&R DS1847B-050/T&R DS1847E-010+ DS1847E-010+T&R DS1847E-050+ DS1847E-050+T&R + Denotes lead-free package. 14-PIN TSSOP 173-MIL 14-PIN TSSOP 173-MIL 14-PIN TSSOP/TAPE & REEL 14-PIN TSSOP/TAPE & REEL 16-BALL CSBGA 16-BALL CSBGA 16-BALL CSBGA LF 16-BALL CSBGA LF T&R 16-BALL CSBGA T&R 16-BALL CSBGA LF 16-BALL CSBGA LF T&R 16-BALL CSBGA T&R 14-PIN TSSOP LF 173-MIL 14-PIN TSSOP LF T&R 14-PIN TSSOP LF 173-MIL 14-PIN TSSOP LF T&R -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC DS1847 VERSION Resistor 0 /Resistor 1 10kW/10kW 50kW/10kW/10kW 50kW/10kW/10kW 50kW/10kW/10kW/10kW/10kW 50kW/10kW 50kW/10kW 50kW/10kW/10kW/10kW 50kW/10kW 50kW/10kW 17 of 17

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§ 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 1 SCL 2

A0 3 A1 4 A2 5 WP 6 GND 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

The DS1847 Dual Temperature-Controlled Nonvolatile NV Variable Resistor consists of two 256position 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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011806

PIN DESCRIPTIONS

Name TSSOP BGA

VCC 14

GND 7

SDA 1

SCL 2

H0 13

H1 11

L1 10

NC 12

DS1847

Description Power Supply Terminal. The DS1847 will support supply voltages ranging from +3.0V to +5.5V. Ground Terminal. 2-Wire Serial Data Interface. The serial data pin is for serial data transfer to and from the DS1847. The pin is open drain and may be wire-ORed with other open drain or open collector interfaces. 2-Wire Serial Clock Input. The serial clock input is used to clock data into the DS1847 on rising edges and clock data out on falling edges. Write Protect Input. If open or set to logic 1, all memory, control
registers, and Look-up tables are write protected. If set to a logic 0, the device is not write protected and can be written to. The WP pin is pulled high internally. Address Input. Pins A0, A1, and A2 are used to specify the address of each DS1847 when used in a multi-dropped configuration. Address Input. Address Input. High terminal of Resistor For both resistors, it is not required that the high terminal be connected to a potential greater than the low terminal. Voltage applied to the high terminal of each resistor cannot exceed VCC, or go below ground. High terminal of Resistor Low terminal of Resistor For both resistors, it is not required that the low terminal be connected to a potential less than the high terminal. Voltage applied to the low terminal of each resistor cannot exceed VCC, or go below ground. Low terminal of Resistor No Connect. No Connect. No Connect. No Connect.
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DS1847 BLOCK DIAGRAM Figure 1

WP A0 A1 A2 SDA

SCL VCC Gnd
2-Wire Interface
72x8 bit

EEPROM
ORDERING INFORMATION
10000

TEMPCO vs. RESISTANCE 50K RESISTOR
1100
1000
500 0
10000 20000 30000 40000 50000 RESISTANCE OHMS
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ORDERING NUMBER

PACKAGE

OPERATING TEMPERATURE

DS1847E-010 DS1847E-050 DS1847E-010/T&R DS1847E-050/T&R DS1847B-010 DS1847B-050 DS1847B-010+ DS1847B-010+T&R DS1847B-010/T&R DS1847B-050+ DS1847B-050+T&R DS1847B-050/T&R DS1847E-010+ DS1847E-010+T&R DS1847E-050+ DS1847E-050+T&R
+ Denotes lead-free package.
14-PIN TSSOP 173-MIL 14-PIN TSSOP 173-MIL 14-PIN TSSOP/TAPE & REEL 14-PIN TSSOP/TAPE & REEL
16-BALL CSBGA 16-BALL CSBGA 16-BALL CSBGA LF 16-BALL CSBGA LF T&R 16-BALL CSBGA T&R 16-BALL CSBGA LF 16-BALL CSBGA LF T&R 16-BALL CSBGA T&R 14-PIN TSSOP LF 173-MIL 14-PIN TSSOP LF T&R 14-PIN TSSOP LF 173-MIL 14-PIN TSSOP LF T&R
-40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC -40ºC TO +95ºC

DS1847

VERSION Resistor 0 /Resistor 1 10kW/10kW 50kW/10kW/10kW 50kW/10kW/10kW 50kW/10kW/10kW/10kW/10kW 50kW/10kW 50kW/10kW 50kW/10kW/10kW/10kW 50kW/10kW 50kW/10kW
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Datasheet ID: DS1847E-010 647165