AS1522, AS1523
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, 4 0 0 / 3 0 0 k s ps ,
4-Channel A/D Converters
Product Brief
1 General Description
The AS1522/AS1523 are low-power, 4/2-channel, 400/
300ksps, 10-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, AS1522; 2.2mA @ 300ksps, AS1523) 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,
AS1522; +2.7 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 V
DD
).
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.
2 Key Features
!
Single-Supply Operation:
- +4.5 to +5.5V (AS1522)
- +2.7 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
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.
11
Figure 1. Block Diagram and Pin Assignments
14
CSN
15
SCLK
13
DIN
Input Shift
Register
Output
Shift
Register
DOUT
12
SSTRB
V
DD1
1
CH0 2
CH1 3
CH2 4
16 V
DD2
15 SCLK
14 CSN
AS1522/
AS1523
12-Bit
SAR
7
V
DD3
16
V
DD2
Control
Logic
2:5
CH0:CH3
6
COM
+1.2V
REF
Analog
Input
Track/
Hold
17kΩ
Av
≈
2.05
+2.50V
IN
CH3 5
COM 6
V
DD3
7
REF 8
AS1522/
AS1523
13 DIN
12 SSTR
11 DOUT
10 GND
9 REFADJ
OUT
REF
1
V
DD1
9
REFADJ
8
REF
10
GND
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Revision 1.00
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AS1522/AS1523
Product Brief
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, trans-
lated, 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. austriami-
crosystems 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 life-
sustaining 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 tech-
nical 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:
http://www.austriamicrosystems.com/contact
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