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AS1534 Datasheet(PDF) 1 Page - ams AG |
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AS1534 Datasheet(HTML) 1 Page - ams AG |
1 / 2 page AS1534 12-bit, 8-Channel, Low-Power, 200ksps A/D Converter austriamicrosystems Produ ct Brief www.austriamicrosystems.com Revision 1.03 1 - 2 1 General Description The AS1534 is a low-power, 8-channel, 200ksps, 12-bit analog-to-digital (A/D) converter specifically designed to operate with single-supply devices. Superior AC charac- teristics, very low power-consumption, and highly-reli- able packaging make the AS1534 perfect for battery- powered remote-sensor and data-acquisition devices. The successive-approximation register (SAR), high- speed sampling, high-bandwidth track/hold circuitry, and configurable inputs combine to make the AS1534 highly- flexible and configurable. Internal registers are used to control the AS1534 fea- tures, report on the status of the device, and hold the A/D conversion results. The device requires very low supply-current at the 200ksps max sampling speed, and features flexible power-down modes to reduce power consumption at slower throughput rate. The AS1534 operates from a single +3 to +3.6V supply and contains an internal 2.5V reference and integrated reference buffer. The device also supports an external reference. Data accesses are made via the fast 8-/16-bit parallel interface in support of a wide range of microprocessors. The AS1534 is available in a 44-pin PQFP package. Figure 1. Block Diagram 2 Key Features ! Sampling Rate: 200ksps ! 8- and 16-Bit Parallel Interface ! Analog Input Types: - 8-Channel Single-Ended - 4-Channel Pseudo-Differential - 4-Channel Fully-Differential ! Software-Configurable Unipolar or Bipolar Inputs ! Internal +2.5V Reference ! External Reference: 1.2V to VDD ! Low-Power Operation: - 7.5mW (VDD = 3 V) - 1.5mW (Using Automatic Power-Down after Con- version; VDD = 3 V, 10ksps) ! Single-Supply Operation: +3 to +3.6V ! 44-pin PQFP Package 3 Applications The device is ideal for remote sensors, data-acquisition and data-logging devices, pen-digitizers, process con- trol, or any other space-limited A/D application with low power-consumption requirements. 8:15 AIN0:AIN7 AS1534 12-Bit SAR and A/D Conversion Control +2.5V REF I/P MUX REFIN/ REFOUT DB0:DB15 40 BUSY 41 CONVSTN 39 CLKIN 28 DGND 27 DVDD 18 SLEEPN Track/ Hold Comp- arator 3 Buffer 7 CREF2 Parallel Interface Controller Register 6 CREF1 Charge Redistribution DAC 43 RDN 44 CSN 2 WBN 42 WRN 5 AGND 4 AVDD 29 DB8/HBEN 150k Ω |
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