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AS1531 Datasheet(PDF) 1 Page - ams AG |
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AS1531 Datasheet(HTML) 1 Page - ams AG |
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1 / 29 page  AS1530, AS1531 12-Bit, Single-Supply, Low-Power, 400/300ksps A/D Converters austriamicrosystems Data Sh eet www.austriamicrosystems.com Revision 0.96 1 - 29 1 General Description The AS1530/AS1531 are low-power, 4/8-channel, 400/ 300ksps, 12-bit analog-to-digital (A/D) converters specif- ically designed to operate with single-supply devices. Superior AC characteristics, very low power consump- tion, and highly-reliable packaging make these ultra- small devices perfect for battery-powered remote-sen- sor and data-acquisition devices. The successive-approximation register (SAR), high- speed sampling, high-bandwidth track/hold circuitry, and multi-mode operation combine to make these devices highly-flexible and configurable. Both devices require low supply current (2.8mA @ 400ksps, AS1530; 2.2mA @ 300ksps, AS1531) and fea- ture a reduced-power mode and a power-down mode to lower power consumption at slower throughput rates. The devices operate from a single supply (+4.5 to +5.5V, AS1530; +2.7 to +3.6V, AS1531). Both devices contain an internal 2.5V reference, an integrated reference buffer, and feature support for an external reference (1V to VDD). Data accesses are made via the high-speed, 4-wire, SPI, QSPI-, and Microwire-compatible serial interface. The devices are available in a 20-pin TSSOP package. For lower-speed versions of these devices, contact aus- triamicrosystems, AG regarding the AS1526/AS1527 A/D converters. Figure 1. Block Diagram and Pin Assignments 2 Key Features ! Single-Supply Operation: - +4.5 to +5.5V (AS1530) - +2.7 to +3.6V (AS1531) ! Sampling Rate: - 400ksps (AS1530) - 300ksps (AS1531) ! Software-Configurable Analog Input Types: - 8-Channel Single-Ended - 8-Channel Pseudo Differential Referenced to COM - 4-Channel Pseudo Differential - 4-Channel Fully Differential ! Software-Configurable Input Range ! Internal +2.5V Reference ! Low-Current Operation: - 2.8mA @ 400ksps (AS1530) - 2.2mA @ 300ksps (AS1531) - 0.4mA in Reduced-Power Mode - 0.5µA in Full Power-Down Mode ! SPI/QSPI/Microwire/TMS320-Compatible ! 20-pin TSSOP Package 3 Applications The devices are ideal for remote sensors, data-acquisi- tion and data-logging devices, pen-digitizers, process control, or any other space-limited A/D application with low power-consumption requirements. AS1530/ AS1531 Control Logic Output Shift Register 12-Bit SAR IN OUT REF Analog Input +1.2V REF Input Shift Register Track/ Hold 17k Ω Av ≈ 2.05 +2.50V 15 SSTRB 17 CSN 14 DOUT 20 VDD1 19 VDD2 13 GND 18 SCLK 16 DIN 1:8 CH0:CH7 9 COM 12 REFADJ 11 REF 10 VDD3 AS1530/ AS1531 1 CH0 2 CH1 3 CH2 4 CH3 5 CH4 6 CH5 7 CH6 8 CH7 9 COM 10 VDD3 20 VDD1 19 VDD2 18 SCLK 17 CSN 16 DIN 15 SSTRB 14 DOUT 13 GND 12 REFADJ 11 REF |
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