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AS1507 Datasheet(PDF) 1 Page - ams AG |
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AS1507 Datasheet(HTML) 1 Page - ams AG |
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1 / 17 page  AS1507 Dual 256-Tap Digita l Potentiometer with SPI Interface and High Endurance EEPROM Dat a Sh eet www.austriamicrosystems.com Revision 1.00 1 - 17 1 General Description The AS1507 is a linear, dual 256-tap digital potentiome- ter specifically designed to replace discrete/mechanical potentiometers and is ideal for applications requiring a low-temperature-coefficient variable resistor. 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 16). The 3-wire SPI-compatible serial interface allows com- munication at data rates up to 5MHz. The internal EEPROM stores the last wiper position for initialization during power-up. The devices are available in an TQFN 3x3mm 16-pin package. Figure 1. Block Diagram 2 Key Features ! 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: 10/50/100k Ω ! Low End-to-End Resistance Temperature Coefficient: 90ppm/ºC ! Low-Power Standby Mode: 100nA ! 5MHz SPI-Compatible Serial Interface ! Single-Supply Operation: +2.7 to +5.5V ! TQFN 3x3mm 16-pin 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. Table 1. Standard Products Model End-to-End Resistance (k Ω) AS1507-10 10 AS1507-50 50 AS1507-100 100 256-Position Decoder 16-Bit EEPROM 8-Bit Latch SPI Interface 8-Bit Latch AS1507 256-Position Decoder 8 25 2 SCLK 1 VDD 3 SDIO 4 CSN 13 LOW A 7 GND 14 WIPER 15 HIGH A SPI Interface 8-Bit Latch 8-Bit Latch 256-Position Decoder 8 25 256-Position Decoder Power- On Reset 12 HIGH B 11 WIPER 10 LOW B 16 MUTE 9 READY |
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