AS1522-T

AS1522-T Datasheet

AS1522, AS1523

Part	Datasheet
AS1522-T	AS1522-T (pdf)

Related Parts	Information
AS1523-T	AS1523-T

PDF Datasheet Preview
AS1522, AS1523 10-Bit, Single-Supply, Low-Power, 400/300ksps, 4-Channel A/D Converters Data Sheet 1 General Description 2 Key Features The AS1522/AS1523 are low-power, 4/2-channel, 400/ 300ksps, 10-bit analog-to-digital A/D converters specifically designed to operate with single-supply devices. Superior AC characteristics, very low power consumption, and highly-reliable packaging make these ultrasmall devices perfect for battery-powered remote-sensor and data-acquisition devices. The successive-approximation register SAR , highspeed 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, AS1522 2.2mA 300ksps, AS1523 and feature a reduced-power mode and a power-down mode to lower power consumption at slower throughput rates. The devices operate from a single supply to +5.5V, AS1522 to +3.6V, AS1523 . 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 16-pin TSSOP package. ! Single-Supply Operation - to +5.5V AS1522 - to +3.6V AS1523 ! Sampling Rate - 400ksps AS1522 - 300ksps AS1523 ! Software-Configurable Analog Input Types - 4-Channel Single-Ended - 4-Channel Pseudo Differential Referenced to COM - 2-Channel Pseudo Differential - 2-Channel Fully Differential ! Software-Configurable Input Range ! Internal +2.5V Reference ! Low-Current Operation: - 2.8mA 400ksps AS1522 - 2.2mA 300ksps AS1523 - 0.4mA in Reduced-Power Mode - 0.5µA in Full Power-Down Mode ! SPI/QSPI/Microwire/TMS320-Compatible ! 16-pin TSSOP Package 3 Applications Figure Block Diagram and Pin Assignments The devices are ideal for remote sensors, data-acquisition and data-logging devices, pen-digitizers, process control, or any other space-limited A/D application with low power-consumption requirements. 14 CSN 15 SCLK 13 DIN 2:5 CH0:CH3 6 COM 9 REFADJ 8 REF Output Shift Register Input Shift Register Control Logic Analog Input AS1522/ AS1523 Track/ Hold 12-Bit SAR +1.2V REF 17kΩ +2.50V 11 DOUT 12 SSTRB 7 VDD3 16 VDD2 1 VDD1 Single-Ended Input 16 Differential Input 16 Starting a Conversion 17 Transfer Functions 18 Power Modes 19 Reduced Power Mode 20 Full Power-Down Mode 20 Reference 21 Internal Reference 21 External Reference 22 9 Application Information 23 Initialization 23 Serial Interface 23 Serial Interface Configuration 23 QSPI Interface 24 Layout Considerations 25 10 Package Drawings and Markings 26 11 Ordering Information 27 2 - 28 AS1522/AS1523 Data Sheet - Pinout 4 Pinout Pin Assignments Figure Pin Assignments Top View VDD1 1 CH0 2 CH1 3 CH2 4 CH3 5 COM 6 VDD3 7 REF 8 AS1522/ AS1523 16 VDD2 15 SCLK 14 CSN 13 DIN 12 SSTR 11 DOUT 10 GND 9 REFADJ 12 Pin Descriptions Table Pin Descriptions Pin Number Pin Name VDD1 CH0:CH3 VDD3 REFADJ DOUT SSTRB SCLK VDD2 Positive Supply Voltage Analog Sampling Inputs. These four pins serve as analog sampling inputs. Common Analog Inputs. Tie this pin to ground in single-ended mode. Positive Supply Voltage Reference-Buffer Output/A/DC Reference Input. This pin serves as the reference voltage for analog-to-digital conversions. In internal reference mode, the reference buffer provides a +2.50V nominal output, externally adjustable at pin REFADJ. In external reference mode, disable the internal buffer by pulling pin REFADJ to VDD1. Reference-Buffer Amplifier Input. To disable the reference-buffer amplifier, tie this pin to VDD1. Analog and Digital Ground Serial Data Output. Data is clocked out at the rising edge of pin SCLK. DOUT is high impedance when CSN is high. Serial Strobe Output. SSTRB pulses high for one clock period before the MSB is clocked out. SSTRB is high impedance when CSN is high. Serial Data Input. Data is clocked in at the rising edge of SCLK. Active-Low Chip Select. Data will not be clocked into pin DIN unless CSN is low. When CSN is high, pins DOUT and SSTRB are high impedance. Serial Clock Input. This pin clocks data into and out of the serial interface, and is used to set the conversion speed. Note The duty cycle must be between 40 and Positive Supply Voltage 3 - 28 AS1522/AS1523 Data Sheet - Absolute Maximum Ratings 5 Absolute Maximum Ratings Stresses beyond those listed in Table 2 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 Electrical Characteristics on page 5 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table Absolute Maximum Ratings Parameter Min Max Units Comments VDD1, VDD2, VDD3 to GND VDD1 to VDD2 to VDD3 CH0:CH3, COM to GND VDD1 + AS1522/AS1523 Data Sheet - Ordering Information 11 Ordering Information The devices are available as the standard products shown in Table Table Ordering Information Model AS1522-BTST 10-bit ADC, 4-channel, 400ksps AS1522-BTSU 10-bit ADC, 4-channel, 400ksps AS1523-BTST 10-bit ADC, 4-channel, 300ksps AS1523-BTSU 10-bit ADC, 4-channel, 300ksps Delivery Form Tape and Reel Tubes Tape and Reel Tubes Package 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 27 - 28 AS1522/AS1523 Data Sheet Copyrights Copyright 1997-2007, austriamicrosystems AG, Schloss Premstaetten, 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 lifesustaining 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 A-8141 Schloss Premstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: 28 - 28

PDF Datasheet Preview

AS1522, AS1523
10-Bit, Single-Supply, Low-Power, 400/300ksps, 4-Channel A/D Converters

Data Sheet
1 General Description
2 Key Features

The AS1522/AS1523 are low-power, 4/2-channel, 400/ 300ksps, 10-bit analog-to-digital A/D converters specifically designed to operate with single-supply devices. Superior AC characteristics, very low power consumption, and highly-reliable packaging make these ultrasmall devices perfect for battery-powered remote-sensor and data-acquisition devices.

The successive-approximation register SAR , highspeed 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, AS1522 2.2mA 300ksps, AS1523 and feature a reduced-power mode and a power-down mode to lower power consumption at slower throughput rates.

The devices operate from a single supply to +5.5V, AS1522 to +3.6V, AS1523 . 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 16-pin TSSOP package.
! Single-Supply Operation - to +5.5V AS1522 - to +3.6V AS1523
! Sampling Rate - 400ksps AS1522 - 300ksps AS1523
! Software-Configurable Analog Input Types - 4-Channel Single-Ended - 4-Channel Pseudo Differential Referenced to COM - 2-Channel Pseudo Differential - 2-Channel Fully Differential
! Software-Configurable Input Range ! Internal +2.5V Reference ! Low-Current Operation:
- 2.8mA 400ksps AS1522 - 2.2mA 300ksps AS1523 - 0.4mA in Reduced-Power Mode - 0.5µA in Full Power-Down Mode ! SPI/QSPI/Microwire/TMS320-Compatible ! 16-pin TSSOP Package
3 Applications

Figure Block Diagram and Pin Assignments

The devices are ideal for remote sensors, data-acquisition and data-logging devices, pen-digitizers, process control, or any other space-limited A/D application with low power-consumption requirements.
14 CSN
15 SCLK
13 DIN
2:5 CH0:CH3
6 COM
9 REFADJ
8 REF

Output Shift

Register

Input Shift Register

Control Logic

Analog Input

AS1522/ AS1523

Track/ Hold
12-Bit SAR
+1.2V REF
17kΩ
+2.50V
11 DOUT 12 SSTRB
7 VDD3
16 VDD2
1 VDD1
Single-Ended Input 16 Differential Input 16 Starting a Conversion 17 Transfer Functions 18 Power Modes 19 Reduced Power Mode 20 Full Power-Down Mode 20 Reference 21 Internal Reference 21 External Reference 22 9 Application Information 23 Initialization 23 Serial Interface 23 Serial Interface Configuration 23 QSPI Interface 24 Layout Considerations 25 10 Package Drawings and Markings 26 11 Ordering Information 27
2 - 28

AS1522/AS1523 Data Sheet - Pinout
4 Pinout

Pin Assignments

Figure Pin Assignments Top View

VDD1 1 CH0 2 CH1 3 CH2 4 CH3 5 COM 6 VDD3 7 REF 8

AS1522/ AS1523
16 VDD2 15 SCLK 14 CSN 13 DIN 12 SSTR 11 DOUT 10 GND 9 REFADJ
12 Pin Descriptions

Table Pin Descriptions

Pin Number Pin Name

VDD1

CH0:CH3

VDD3

REFADJ

DOUT

SSTRB

SCLK

VDD2

Positive Supply Voltage

Analog Sampling Inputs. These four pins serve as analog sampling inputs.

Common Analog Inputs. Tie this pin to ground in single-ended mode.

Positive Supply Voltage

Reference-Buffer Output/A/DC Reference Input. This pin serves as the reference voltage for analog-to-digital conversions. In internal reference mode, the reference buffer provides a +2.50V nominal output, externally adjustable at pin REFADJ. In external reference mode, disable the internal buffer by pulling pin REFADJ to VDD1. Reference-Buffer Amplifier Input. To disable the reference-buffer amplifier, tie this pin to VDD1.

Analog and Digital Ground

Serial Data Output. Data is clocked out at the rising edge of pin SCLK. DOUT is high impedance when CSN is high. Serial Strobe Output. SSTRB pulses high for one clock period before the MSB is clocked out. SSTRB is high impedance when CSN is high.

Serial Data Input. Data is clocked in at the rising edge of SCLK.

Active-Low Chip Select. Data will not be clocked into pin DIN unless CSN is low. When CSN is high, pins DOUT and SSTRB are high impedance. Serial Clock Input. This pin clocks data into and out of the serial interface, and is used to set the conversion speed. Note The duty cycle must be between 40 and

Positive Supply Voltage
3 - 28

AS1522/AS1523 Data Sheet - Absolute Maximum Ratings
5 Absolute Maximum Ratings

Stresses beyond those listed in Table 2 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 Electrical Characteristics on page 5 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Table Absolute Maximum Ratings

Parameter

Min Max Units

Comments

VDD1, VDD2, VDD3 to GND VDD1 to VDD2 to VDD3

CH0:CH3, COM to GND

VDD1 +
AS1522/AS1523 Data Sheet - Ordering Information
11 Ordering Information

The devices are available as the standard products shown in Table
Table Ordering Information

Model

AS1522-BTST
10-bit ADC, 4-channel, 400ksps

AS1522-BTSU
10-bit ADC, 4-channel, 400ksps

AS1523-BTST
10-bit ADC, 4-channel, 300ksps

AS1523-BTSU
10-bit ADC, 4-channel, 300ksps

Delivery Form Tape and Reel

Tubes Tape and Reel

Tubes

Package 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP
27 - 28

AS1522/AS1523 Data Sheet

Copyrights

Copyright 1997-2007, austriamicrosystems AG, Schloss Premstaetten, 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 lifesustaining 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 A-8141 Schloss Premstaetten, Austria

Tel +43 0 3136 500 0 Fax +43 0 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:
28 - 28

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AS1522-T Datasheet file may be downloaded here without warranties.

Datasheet ID: AS1522-T 519638