AS1506-BTDT-100-1K

AS1506-BTDT-100-1K Datasheet

AS1506

Part	Datasheet
AS1506-BTDT-100-1K	AS1506-BTDT-100-1K (pdf)

Related Parts	Information
AS1506-BTDT-50	AS1506-BTDT-50
AS1506-BTDT-10	AS1506-BTDT-10
AS1506-BTDT-50-1K	AS1506-BTDT-50-1K
AS1506-BTDT-100	AS1506-BTDT-100

PDF Datasheet Preview
Datasheet AS1506 256-Tap Digital Potentiometer with SPI Interface and High Endurance EEPROM 1 General Description 2 Key Features The AS1506 is a linear, 256-tap digital potentiometer specifically designed to replace discrete/mechanical potentiometers and is ideal for applications requiring a low-temperature-coefficient variable resistor, such as low-drift, programmable gain, and amplifier circuit configurations. The device is controlled via a 3-wire SPI-compatible interface and features an internal EEPROM for storing wiper positions. Several device variants are available differentiated by end-to-end resistance as shown in Table 1 see also Ordering Information on page Table Standard Products Model End-to-End Resistance kΩ AS1506-10 AS1506-50 AS1506-100 The 3-wire SPI-compatible serial interface allows communication at data rates up to 5MHz.The internal EEPROM stores the last wiper position for initialization during power-up and a low-power standby mode. The devices are available in an 8-pin TDFN 3x3mm package. ! High Endurance EEPROM up to 10M cycles ! High Reliability EEPROM up to 150 years data retention 85°C ! Wiper Position Retained in EEPROM and loaded at Power-Up ! 256 Tap Positions ! ±0.5LSB DNL in Voltage Divider Mode ! ±0.5LSB INL in Voltage Divider Mode ! End-to-End Resistance 10/50/100kΩ ! Low End-to-End Resistance Temperature Coefficient 90ppm/ºC ! Low-Power Standby Mode 100nA ! 5MHz SPI-Compatible Serial Interface ! Single-Supply Operation +2.7V to +5.5V ! 8-pin TDFN 3x3mm Package 3 Applications The device is ideal for mechanical potentiometer replacement, low-drift programmable gain amplifiers, audio volume control, LCD contrast control, and low-drift programmable filters. Figure AS1506 - Block Diagram 1 VDD 8-Bit Shift Register 8-Bit Latch 2 SCLK 3 SDIO 4 CSN SPI Interface PowerOn Reset 8-Bit EEPROM 256-Position Decoder AS1506 8 HIGH 7 WIPER 6 LOW 5 GND 1 - 17 AS1506 Datasheet - Pinout 4 Pinout Pin Assignments Figure Pin Assignments Top View VDD 1 SCLK 2 SDIO 3 CSN 4 AS1506 The AS1506 contains a resistor array with 255 resistive elements tap points , and has a total end-to-end resistance of 10, 50, or 100kΩ see Ordering Information on page The device provides high, low, and wiper terminals for a standard voltage-divider configuration. Pins HIGH, LOW, and WIPER can be connected in any configuration as long as their voltages fall between GND and VDD. A 3-wire, SPI-compatible serial interface controls movement of the wiper among the 256 tap points. The EEPROM stores the wiper position and recalls the stored wiper position upon power-up. The EEPROM typically holds wiper data for 150 years and up to 10M wiper store cycles. Analog Circuit The 256 tap points are accessible to the wiper along the resistor string between pins HIGH and LOW similar to the end terminals of a mechanical potentiometer . The wiper tap point is selected by programming 8 data bits and a control byte via the 3-wire serial interface see Programming the Device on page Note Integrated power-on reset circuitry loads the wiper position from the EEPROM at power-up. Digital Interface The AS1506 uses an SPI-compatible 3-wire interface for command settings of the device consisting of two input signals chip-select - CSN, and data clock - SCLK and one bi-directional data pin SDIO . Driving CSN low enables serial interface and the command/data are passed into the device synchronously by each SCLK rising edge. There are 16-bit commands for write data into the wiper register or the non-volatile memory, and 8-bit commands for transferring data between wiper register and non-volatile memory and to read the data stored in the wiper register or non-volatile memory. The 8-bit commands can be implemented in 16-bit command structure alternatively. In this case the first 8 bits shifted through the SPI interface are not significant. The data byte passed at writing commands represents the position of the wiper. After loading the 8- or 16-bit command while CSN is low, the loaded command is executed at the next rising edge of CSN, simultaneously the serial interface is disabled. The CSN signal must be low during the whole serial input stream through the SPI, otherwise data on the SPI interface are corrupted. Note If the data-in stream does not exactly contain 8 or 16 digits, no command is executed at the rising edge of CSN. Figure Serial Data Timing CSN SCLK tCS0 tCSS SDIO tCSH tCSW tCS1 Standby Mode Low-power standby mode is enable at CSN high. After an read access standby mode is entered 2 cycles of SCLK after issuing the last bit of the data wiper or non-volatile register. If the digital inputs are stable VDD or GND there is only leakage power dissipation of the device. This power dissipation is defined with 0.1uA typ at 25ºC. 9 - 17 AS1506 Datasheet - Detailed Description EEPROM Non-Volatile Register There is an internal EEPROM register implemented to retain the wiper position after power down. During an ongoing write cycle of the non-volatile register tBUSY time the system must not be powered down. Data retention defines the ability of an EEPROM to retain data over time. The qualification has been done according to JEDEC Retention Lifetime Specification A117 . The EEPROM is cycled to the specified endurance limit before the data retention test is done. Based on activation energy of 0.6eV the data retention time derates over temperature as shown in Figure 19 on page For the non-volatile register 1M endurance cycles and a data retention of 150 years are typical at 85 ºC. The non-volatile register is factory trimmed to mid-scale. Power-Up The AS1506 contains an integrated power-up circuit. At power up, the data are transferred from the non-volatile memory to the wiper register. The wiper register moves to the stored position. This data transfer takes 5µs after the supply has reached the POR trigger level. Programming the Device Write commands see Table 6 require 16 clock cycles see Figure 22 on page 12 to clock in the command and data. Copy and Read commands see Table 6 can use 8 clock cycles to clock in the command see Figure 21 on page 11 or 16 clock cycles. At 16 clock cycle commands the 8 data bits D7:D0 are insignificant. Table Command/Data Word Format Command 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 C7 C6 C5 C4 C3 C2 C1 C0 D7 D6 D5 D4 D3 D2 D1 D0 Write Wiper Register 0 D7 D6 D5 D4 D3 D2 D1 D0 Write to Non-Volatile Register 0 1 0 D7 D6 D5 D4 D3 D2 D1 D0 Copy Wiper Register to NonVolatile Register Copy Non-Volatile Register to Wiper Register 00110000 Read Non-Volatile Register 0 1 0 1 0 - - - - - - - - Read Wiper Register 01101000 - - - - - - - - Commands Datasheet - Ordering Information 11 Ordering Information The device is available as the standard products shown in Table Table Ordering Information Ordering Code Marking End-to-End Resistance Delivery Form Package AS1506-BTDT-10 ASMO 256-Tap, Non-Volatile, SPI Digital Potentiometer 10kΩ Tape and Reel 8-pin TDFN 3x3mm AS1506-BTDT-50 ASMN 256-Tap, Non-Volatile, SPI Digital Potentiometer 50kΩ Tape and Reel 8-pin TDFN 3x3mm AS1506-BTDT-100 ASMM 256-Tap, Non-Volatile, SPI Digital Potentiometer 100kΩ Tape and Reel 8-pin TDFN 3x3mm Note All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect: For further information and requests, please contact us or find your local distributor at 16 - 17 AS1506 Datasheet Copyrights Copyright 1997-2009, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. Disclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. Contact Information Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: 17 - 17

PDF Datasheet Preview

Datasheet

AS1506
256-Tap Digital Potentiometer with SPI Interface and High Endurance EEPROM
1 General Description
2 Key Features

The AS1506 is a linear, 256-tap digital potentiometer specifically designed to replace discrete/mechanical potentiometers and is ideal for applications requiring a low-temperature-coefficient variable resistor, such as low-drift, programmable gain, and amplifier circuit configurations.

The device is controlled via a 3-wire SPI-compatible interface and features an internal EEPROM for storing wiper positions.
Several device variants are available differentiated by end-to-end resistance as shown in Table 1 see also Ordering Information on page

Table Standard Products

Model

End-to-End Resistance kΩ

AS1506-10

AS1506-50

AS1506-100

The 3-wire SPI-compatible serial interface allows communication at data rates up to 5MHz.The internal EEPROM stores the last wiper position for initialization during power-up and a low-power standby mode.

The devices are available in an 8-pin TDFN 3x3mm package.
! High Endurance EEPROM up to 10M cycles ! High Reliability EEPROM up to 150 years data
retention 85°C ! Wiper Position Retained in EEPROM and loaded at

Power-Up ! 256 Tap Positions ! ±0.5LSB DNL in Voltage Divider Mode ! ±0.5LSB INL in Voltage Divider Mode ! End-to-End Resistance 10/50/100kΩ ! Low End-to-End Resistance Temperature

Coefficient 90ppm/ºC ! Low-Power Standby Mode 100nA ! 5MHz SPI-Compatible Serial Interface ! Single-Supply Operation +2.7V to +5.5V ! 8-pin TDFN 3x3mm Package
3 Applications

The device is ideal for mechanical potentiometer replacement, low-drift programmable gain amplifiers, audio volume control, LCD contrast control, and low-drift programmable filters.

Figure AS1506 - Block Diagram
1 VDD
8-Bit Shift Register
8-Bit Latch
2 SCLK
3 SDIO
4 CSN

SPI Interface

PowerOn

Reset
8-Bit EEPROM
256-Position

Decoder

AS1506
8 HIGH 7 WIPER
6 LOW
5 GND
1 - 17

AS1506

Datasheet - Pinout
4 Pinout

Pin Assignments

Figure Pin Assignments Top View

VDD 1 SCLK 2 SDIO 3

CSN 4

AS1506
The AS1506 contains a resistor array with 255 resistive elements tap points , and has a total end-to-end resistance of 10, 50, or 100kΩ see Ordering Information on page The device provides high, low, and wiper terminals for a standard voltage-divider configuration. Pins HIGH, LOW, and WIPER can be connected in any configuration as long as their voltages fall between GND and VDD. A 3-wire, SPI-compatible serial interface controls movement of the wiper among the 256 tap points. The EEPROM stores the wiper position and recalls the stored wiper position upon power-up. The EEPROM typically holds wiper data for 150 years and up to 10M wiper store cycles.

Analog Circuit

The 256 tap points are accessible to the wiper along the resistor string between pins HIGH and LOW similar to the end terminals of a mechanical potentiometer . The wiper tap point is selected by programming 8 data bits and a control byte via the 3-wire serial interface see Programming the Device on page

Note Integrated power-on reset circuitry loads the wiper position from the EEPROM at power-up.

Digital Interface

The AS1506 uses an SPI-compatible 3-wire interface for command settings of the device consisting of two input signals chip-select - CSN, and data clock - SCLK and one bi-directional data pin SDIO . Driving CSN low enables serial interface and the command/data are passed into the device synchronously by each SCLK rising edge. There are 16-bit commands for write data into the wiper register or the non-volatile memory, and 8-bit commands for transferring data between wiper register and non-volatile memory and to read the data stored in the wiper register or non-volatile memory. The 8-bit commands can be implemented in 16-bit command structure alternatively. In this case the first 8 bits shifted through the SPI interface are not significant. The data byte passed at writing commands represents the position of the wiper. After loading the 8- or 16-bit command while CSN is low, the loaded command is executed at the next rising edge of CSN, simultaneously the serial interface is disabled. The CSN signal must be low during the whole serial input stream through the SPI, otherwise data on the SPI interface are corrupted.

Note If the data-in stream does not exactly contain 8 or 16 digits, no command is executed at the rising edge of CSN.

Figure Serial Data Timing

CSN SCLK
tCS0
tCSS

SDIO
tCSH
tCSW tCS1

Standby Mode

Low-power standby mode is enable at CSN high. After an read access standby mode is entered 2 cycles of SCLK after issuing the last bit of the data wiper or non-volatile register. If the digital inputs are stable VDD or GND there is only leakage power dissipation of the device.

This power dissipation is defined with 0.1uA typ at 25ºC.
9 - 17

AS1506

Datasheet - Detailed Description

EEPROM Non-Volatile Register

There is an internal EEPROM register implemented to retain the wiper position after power down. During an ongoing write cycle of the non-volatile register tBUSY time the system must not be powered down.

Data retention defines the ability of an EEPROM to retain data over time. The qualification has been done according to JEDEC Retention Lifetime Specification A117 . The EEPROM is cycled to the specified endurance limit before the data retention test is done. Based on activation energy of 0.6eV the data retention time derates over temperature as shown in Figure 19 on page For the non-volatile register 1M endurance cycles and a data retention of 150 years are typical at 85 ºC. The non-volatile register is factory trimmed to mid-scale.

Power-Up

The AS1506 contains an integrated power-up circuit. At power up, the data are transferred from the non-volatile memory to the wiper register. The wiper register moves to the stored position. This data transfer takes 5µs after the supply has reached the POR trigger level.

Programming the Device

Write commands see Table 6 require 16 clock cycles see Figure 22 on page 12 to clock in the command and data.

Copy and Read commands see Table 6 can use 8 clock cycles to clock in the command see Figure 21 on page 11 or 16 clock cycles. At 16 clock cycle commands the 8 data bits D7:D0 are insignificant.

Table Command/Data Word Format

Command
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 C7 C6 C5 C4 C3 C2 C1 C0 D7 D6 D5 D4 D3 D2 D1 D0

Write Wiper Register
0 D7 D6 D5 D4 D3 D2 D1 D0

Write to Non-Volatile Register 0 1 0 D7 D6 D5 D4 D3 D2 D1 D0

Copy Wiper Register to NonVolatile Register

Copy Non-Volatile Register to Wiper Register
00110000

Read Non-Volatile Register 0 1 0 1 0 - - - - - - - -

Read Wiper Register
01101000 - - - - - - - -

Commands
Datasheet - Ordering Information
11 Ordering Information

The device is available as the standard products shown in Table
Table Ordering Information
Ordering Code Marking

End-to-End Resistance

Delivery Form

Package

AS1506-BTDT-10

ASMO
256-Tap, Non-Volatile, SPI Digital Potentiometer
10kΩ

Tape and Reel 8-pin TDFN 3x3mm

AS1506-BTDT-50

ASMN
256-Tap, Non-Volatile, SPI Digital Potentiometer
50kΩ

Tape and Reel 8-pin TDFN 3x3mm

AS1506-BTDT-100 ASMM
256-Tap, Non-Volatile, SPI Digital Potentiometer
100kΩ Tape and Reel 8-pin TDFN 3x3mm

Note All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect:

For further information and requests, please contact us or find your local distributor at
16 - 17

AS1506

Datasheet

Copyrights

Copyright 1997-2009, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies.

Disclaimer

Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services.

Contact Information

Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:
17 - 17

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Datasheet ID: AS1506-BTDT-100-1K 519635