AS1526 AS1527 AS1526/AS1527 SOIC-150 AS1526/ J-STD-020C VREF/1024 27BSC 53REF

AS1526, AS1527 D a ta S he e t 1 0 - B i t , S i n g l e S u p p l y, L o w - P o w e r, 7 3 k s ps A/ D Conv e rters 1 General

a u s t ri a m i c r o s y s t e m s AS1526 AS1526, AS1527 AS1527 D a ta S he e t 1 0 - B i t , S i n g l e S u p p l y, L o w - P o w e r, 7 3 k s ps A/ D Conv e rters 1 General Description 2 Key Features ! Data accesses are made via the standard, high-speed 3-wire serial interface, which is SPI-, QSPI-, and Microwire-compatible. Both devices contain an internal clock, however, both devices also support an external clock for increased flexibility. The AS1526/AS1527 AS1526/AS1527 are available in an 8-pin SOIC-150 SOIC-150 package. Internal 2.5V Reference (AS1526 AS1526) ! Low Power-Consumption: - 4mW (73ksps, AS1526 AS1526) - 3mW (73ksps, AS1527 AS1527) - 66µW (1ksps, AS1527 AS1527) - 1µW (Shutdown Mode) ! Integrated Track/Hold Amplifier ! Internal Clock ! SPI/QSPI/Microwire 3-Wire Serial Interface ! Operating Temperature Range: -40 to +85ºC ! The AS1527 AS1527 consumes only 3mW (VDD = 3V) at the 73ksps maximum sampling speed. Both devices feature a low-current (0.3µA) shutdown mode, which reduces power consumption at slower throughput rates. Single-Supply Operation:+2.7 to +3.6V ! As with the AS1527 AS1527, the AS1526 AS1526 can also be used with an external reference, which uses the input range 0V to VREF, including the positive supply range. Straight Binary (Unipolar) Data Format ! The AS1526/AS1527 AS1526/AS1527 operate from a single 2.7 to 3.6V supply. The AS1527 AS1527 requires an external reference, using less power than the AS1526 AS1526, however, the AS1526 AS1526 features an internal 2.5V reference. Sampling Rate: 73ksps ! The integrated successive-approximation register (SAR) and a fast (1.5µs) sampling track/hold time provide an economic and highly-reliable A/D conversion solution. 10-Bit Resolution with 7.5µs Conversion Time ! The AS1526/AS1527 AS1526/AS1527 are low-power, 10-bit, 73ksps analog-to-digital (A/D) converters specifically designed for single-supply A/D applications. Superior AC characteristics, very low power consumption, and robust packaging make these ultra-small devices perfect for battery-powered analog-data collection devices. 8-pin SOIC-150 SOIC-150 Package 3 Applications The devices are ideal for remote sensors, data-acquisition, data logging devices, lab instruments, or for any other space-limited A/D devices with low power consumption and single-supply requirements. Figure 1. Block Diagram and Pin Assignments 1 AS1526/AS1527 AS1526/AS1527 VDD 7 Output Shift Register CSN 8 VDD 1 6 DOUT AIN 2 SCLK 3 SHDNN Control Logic AIN Track/ Hold 4 10-Bit SAR REF 4 2.5V Ref 6 DOUT 5 GND 5 GND REF www.austriamicrosystems.com 7 CSN AS1526/ AS1526/ AS1527 AS1527 Internal Clock SHDNN 3 2 8 SCLK Revision 1.02 AS1526 AS1526 only 1 - 21 austriam i c r o systems AS1526 AS1526, AS1527 AS1527 Data Sheet Contents 1 General Description . 1 2 Key Features . 1 3 Applications . 1 4 Absolute Maximum Ratings 5 Electrical Characteristics Timing Characteristics . 3 . 4 .6 6 Typical Operating Characteristics 7 Pinout and Packaging . 7 . 10 Pin Assignments .10 Pin Descriptions .10 8 Detailed Description Analog Input . 11 . 11 Input Protection .12 Track/Hold .12 External Clock .12 Timing and Control Transfer Function .12 .14 Reducing Supply Current .14 Internal 2.5V Reference (AS1526 AS1526) External Reference 9 Application Information Initialization .15 .15 . 16 .16 Serial Interface .16 Serial Interface Configuration .16 SPI and Microwire Interfaces .16 QSPI .17 Layout Considerations .18 Package Drawings and Markings 10 Ordering Information .19 . 20 www.austriamicrosystems.com Revision 1.02 2 - 21 austriam i c r o systems AS1526 AS1526, AS1527 AS1527 Data Sheet 4 Absolute Maximum Ratings Stresses beyond those listed in Table 1 may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in Section 5 Electrical Characteristics on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 1. Absolute Maximum Ratings Parameter Min Max Units VDD to GND 0.3 +5 V AIN to GND -0.3 VDD + 0.3V V REF to GND -0.3 VDD + 0.3V V Digital Inputs to GND -0.3 VDD + 0.3V V DOUT to GND -0.3 VDD + 0.3V V DOUT Current -25 +25 mA 471 mW Continuous Power Dissipation (TAMB = +70ºC) Operating Temperature Range -40 +85 -60 +150 Derate 5.88mW/ºC above +70ºC ºC Storage Temperature Range Comments ºC Package-Body Peak Temperature www.austriamicrosystems.com 260 °C Revision 1.02 The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD-020C J-STD-020C "Moisture/Reflow Sensitivity Classification for non-hermetic Solid State Surface Mount Devices". 3 - 21 austriam i c r o systems AS1526 AS1526, AS1527 AS1527 Data Sheet 5 Electrical Characteristics VDD = +2.7 to +3.6V, 73ksps, fSCLK = 2.1MHz (50% duty cycle); AS1526 AS1526:4.7µF capacitor at REF, AS1527 AS1527: external reference; VREF = 2.5V applied to REF; TAMB = TMIN to TMAX (unless otherwise specified). Table 2. Electrical Characteristics Symbol Parameter DC Accuracy Conditions Min Typ Max Units 1 Resolution 10 Bits 2 ±0.5 LSB ±1 LSB Offset Error ±2 LSB 3 ±2 LSB Relative Accuracy DNL Differential Non-Linearity Gain Error No missing codes over temperature Gain Temperature Coefficient ±1 ppm/°C 61 dB -70 dB 70 dB 2.5 MHz 2.5 MHz Dynamic Specifications (10kHz sine-wave input, 0V to 2.5Vp-p, 73ksps, fSCLK =2.1MHz) SINAD Signal-to-Noise + Distortion Ratio THD Total Harmonic Distortion SFDR Spurious-Free Dynamic Range Small-Signal Bandwidth Up to the 5th harmonic -3dB rolloff Full-Power Bandwidth Conversion Rate tCONV Conversion Time tACQ Track/Hold Acquisition Time Throughput Rate tAP 4 Aperture Delay 5.5 7.5 1.5 Figure 27 on page 13 µs 73 fSCLK = 2.1MHz µs ksps 7