AS1544-BQFT

AS1544-BQFT Datasheet

AS1543/44

Part	Datasheet
AS1544-BQFT	AS1544-BQFT (pdf)

Related Parts	Information
AS1543-BQFT	AS1543-BQFT

PDF Datasheet Preview
AS1543/44 8/4-Channel, 1 Msps, 12-Bit ADC with Sequencer Data Sheet 1 General Description The AS1543/44 is a 12-bit high-speed, low-power, 8/4channel, successive-approximation ADC that operates from a single to 5.25V supply. The device features high throughput rates 1Msps and a low-noise, widebandwidth track-and-hold amplifier that can handle input frequencies in excess of 1 MHz. The AS1543 features 8 single-ended or 4 fully differential analog inputs while the AS1544 offers 4 singleended or 2 fully differential analog inputs. Both include a channel sequencer to allow a programmed selection of channels to be converted sequentially. The conversion time is determined by the SCLK frequency also used as the master clock to control the conversion . The conversion process and data acquisition are controlled using a chip select pin and a serial clock signal, allowing the device to easily interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CSN and conversion is also initiated at this point. There are no pipeline delays associated with the device. The AS1543/44 uses advanced design techniques to achieve very low power dissipation at high throughput rates. At maximum throughput rates, the AS1543/44 consumes just 2.8mA and 3.5mA By using internal control register, single-ended or fullydifferential conversion mode with different input ranges can be used with either straight binary or twos complement output coding. The device is available in a TQFN 4x4 -20 pin package. Figure Typical Application 2 Key Features ! Single Supply Operation with VDRIVE Function to 5.25V ! Fast Throughput Rate 1 Msps ! Sequencer & Channel Counter ! Software-Configurable Analog Input Types - 8/4-Channel Single-Ended - 4/2-Channel Fully-Differential ! Software-Configurable Input Range ! Low Power Consumption at Max Throughput Rates: - 10.1mW 1Msps 3.6V Supply - 18.4mW 1Msps 5.25V Supply ! Shutdown Mode Current 0.5µA ! Flexible Power/Serial Clock Speed Management ! Wide Input Bandwidth 71dB SNR 50 kHz Input Frequency ! No Pipeline Delays ! High Speed SPI/QSPI/Microwire/DSP Interface ! TQFN 4x4 -20 Package 3 Applications 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. VDD REFIN 8 VIN0:7 Multiplexer Track/ Hold AGND GND Sequencer AS1543 12-Bit ADC Control Logic DGND SCLK DOUT DIN CSN VDRIVE 1 - 29 AS1543/44 Data Sheet 1 General Description 1 2 Key Features 1 3 Applications 1 4 Pinout 3 Pin Assignments 3 Pin Descriptions 3 5 Absolute Maximum Ratings 4 6 Electrical Characteristics 5 Timing Specifications 8 7 Typical Operating Characteristics 9 8 Detailed Description 12 Converter Operation 12 Analog Input 13 Analog Input Configuration 15 Input Channel Selection 15 Transfer Functions 16 Two’s Complement Transfer Function 16 Power Mode Selection 17 Sequencer Operation 17 Shadow Register 18 Direct Conversion SEQ = 0, SHADOW = 0 18 Shadow Register Conversion SEQ = 0, SHADOW = 1 19 Channel Counter Conversion SEQ = 1, SHADOW = 1 20 Serial Interface 20 Power Modes 22 Normal Mode PM1 = 1, PM0 = 1 22 Auto Shutdown PM1 = 0, PM0 = X 23 Power vs. Throughput Rate 23 VDRIVE 24 External Reference 24 9 Application Information 25 Initialisation 25 Grounding and Layout Considerations 26 10 Package Drawings and Markings 27 11 Ordering Information 28 2 - 29 AS1543/44 Data Sheet - Pinout 4 Pinout Pin Assignments Figure Pin Assignments Top View 15 VIN4 14 VIN5 13 VIN6 12 VIN7 11 AGND VIN3 16 VIN2 17 VIN1 18 VIN0 19 N/C 20 AS1543 10 REFIN 9 VDD 8 GND 7 CSN 6 DIN 15 N/C 14 N/C 13 N/C 12 N/C 11 AGND VIN3 16 VIN2 17 VIN1 18 VIN0 19 N/C 20 AS1544 10 REFIN 9 VDD 8 GND 7 CSN 6 DIN N/C 1 DGND 2 DOUT 3 SCLK 4 VDRIVE 5 N/C 1 DGND 2 DOUT 3 SCLK 4 VDRIVE 5 Pin Descriptions Table Pin Descriptions Pin Number Pin Name Analog Inputs. 8/4 single-ended or 4/2 fully-differential analog input channels that are multiplexed into the track-and-hold circuitry. Input channels are selected by using address bits ADDR3:ADDR0 page 14 of the control register. The address bits in conjunction with bits SEQ page 14 and SHADOW page 14 allow the sequence register to be VINx programmed. The bit SE/FDN page 14 of the control register selects single-ended or fully-differential conversion mode. In case of single-ended mode the input range can extend from [0V to VREFIN] or [0V to 2 x VREFIN]. In case of fully-differential mode the differential input range can extend from [-VREFIN/2 to +VREFIN/2] or [-VREFIN to +VREFIN]. Note Unused inputs should be connected to AGND to avoid noise. REFIN Reference Input. An external reference must be applied to this input. The voltage range for the external reference is 2.5V ±1% for specified performance. SCLK Serial Clock. Provides the serial clock for accessing data from the part. This clock input is also used as the clock source for the ADC conversion process to 5.25V Supply Input. For the [0V to 2 x VREFIN] range, VDD must be between and 5.25V see Figure 2 VDRIVE Logic Power Supply Input. The voltage supplied at this pin determines the operating voltage of the AS1543/44 serial interface. VDRIVE VDD required. Digital Output. The ADC conversion result is provided serially on this output. Data bits are clocked out on the falling edge of SCLK. The data stream consists of four address bits DOUT indicating the corresponding conversion channel, followed by 12 bits of conversion data MSB first . Output coding may be selected as straight binary or two’s complement depending on the setting of bit CODING page Digital Input. Data is clocked into to the AS1543/44 control register on this input see DIN Control Register on page Data Sheet - Ordering Information 11 Ordering Information The device is available as the standard products shown in Table Table Ordering Information Model AS1543-BTST Marking AS1543 Delivery Form 8-Channel, 1 Msps, 12-Bit ADC with Sequencer Tape and Reel AS1544-BTST AS1544 4-Channel, 1 Msps, 12-Bit ADC with Sequencer Tape and Reel Package TQFN 4x4 -20 TQFN 4x4 -20 28 - 29 AS1543/44 Data Sheet Copyrights Copyright 1997-2008, 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: 29 - 29

PDF Datasheet Preview

AS1543/44
8/4-Channel, 1 Msps, 12-Bit ADC with Sequencer

Data Sheet
1 General Description

The AS1543/44 is a 12-bit high-speed, low-power, 8/4channel, successive-approximation ADC that operates from a single to 5.25V supply. The device features high throughput rates 1Msps and a low-noise, widebandwidth track-and-hold amplifier that can handle input frequencies in excess of 1 MHz.

The AS1543 features 8 single-ended or 4 fully differential analog inputs while the AS1544 offers 4 singleended or 2 fully differential analog inputs. Both include a channel sequencer to allow a programmed selection of channels to be converted sequentially. The conversion time is determined by the SCLK frequency also used as the master clock to control the conversion .

The conversion process and data acquisition are controlled using a chip select pin and a serial clock signal, allowing the device to easily interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CSN and conversion is also initiated at this point. There are no pipeline delays associated with the device.

The AS1543/44 uses advanced design techniques to achieve very low power dissipation at high throughput rates. At maximum throughput rates, the AS1543/44 consumes just 2.8mA and 3.5mA

By using internal control register, single-ended or fullydifferential conversion mode with different input ranges can be used with either straight binary or twos complement output coding.

The device is available in a TQFN 4x4 -20 pin package.

Figure Typical Application
2 Key Features
! Single Supply Operation with VDRIVE Function to 5.25V
! Fast Throughput Rate 1 Msps
! Sequencer & Channel Counter
! Software-Configurable Analog Input Types - 8/4-Channel Single-Ended - 4/2-Channel Fully-Differential
! Software-Configurable Input Range ! Low Power Consumption at Max Throughput Rates:
- 10.1mW 1Msps 3.6V Supply - 18.4mW 1Msps 5.25V Supply
! Shutdown Mode Current 0.5µA ! Flexible Power/Serial Clock Speed Management ! Wide Input Bandwidth 71dB SNR 50 kHz Input

Frequency
! No Pipeline Delays
! High Speed SPI/QSPI/Microwire/DSP Interface
! TQFN 4x4 -20 Package
3 Applications

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.

VDD REFIN
8 VIN0:7

Multiplexer

Track/ Hold

AGND GND

Sequencer

AS1543
12-Bit ADC

Control Logic

DGND

SCLK DOUT DIN CSN VDRIVE
1 - 29

AS1543/44

Data Sheet
1 General Description 1 2 Key Features 1 3 Applications 1 4 Pinout 3

Pin Assignments 3 Pin Descriptions 3 5 Absolute Maximum Ratings 4 6 Electrical Characteristics 5 Timing Specifications 8 7 Typical Operating Characteristics 9 8 Detailed Description 12 Converter Operation 12 Analog Input 13
Analog Input Configuration 15 Input Channel Selection 15 Transfer Functions 16 Two’s Complement Transfer Function 16 Power Mode Selection 17 Sequencer Operation 17 Shadow Register 18 Direct Conversion SEQ = 0, SHADOW = 0 18 Shadow Register Conversion SEQ = 0, SHADOW = 1 19 Channel Counter Conversion SEQ = 1, SHADOW = 1 20 Serial Interface 20 Power Modes 22 Normal Mode PM1 = 1, PM0 = 1 22 Auto Shutdown PM1 = 0, PM0 = X 23 Power vs. Throughput Rate 23 VDRIVE 24 External Reference 24 9 Application Information 25 Initialisation 25 Grounding and Layout Considerations 26 10 Package Drawings and Markings 27 11 Ordering Information 28
2 - 29

AS1543/44

Data Sheet - Pinout
4 Pinout

Pin Assignments

Figure Pin Assignments Top View
15 VIN4 14 VIN5 13 VIN6 12 VIN7 11 AGND

VIN3 16 VIN2 17 VIN1 18 VIN0 19 N/C 20

AS1543
10 REFIN 9 VDD 8 GND 7 CSN 6 DIN
15 N/C 14 N/C 13 N/C 12 N/C 11 AGND

VIN3 16 VIN2 17 VIN1 18 VIN0 19 N/C 20

AS1544
10 REFIN 9 VDD 8 GND 7 CSN 6 DIN

N/C 1 DGND 2 DOUT 3 SCLK 4 VDRIVE 5

N/C 1 DGND 2 DOUT 3 SCLK 4 VDRIVE 5

Pin Descriptions

Table Pin Descriptions

Pin Number Pin Name

Analog Inputs. 8/4 single-ended or 4/2 fully-differential analog input channels that are
multiplexed into the track-and-hold circuitry. Input channels are selected by using address
bits ADDR3:ADDR0 page 14 of the control register. The address bits in conjunction with
bits SEQ page 14 and SHADOW page 14 allow the sequence register to be

VINx programmed. The bit SE/FDN page 14 of the control register selects single-ended or fully-differential conversion mode. In case of single-ended mode the input range can
extend from [0V to VREFIN] or [0V to 2 x VREFIN]. In case of fully-differential mode the
differential input range can extend from [-VREFIN/2 to +VREFIN/2] or [-VREFIN to +VREFIN].

Note Unused inputs should be connected to AGND to avoid noise.

REFIN

Reference Input. An external reference must be applied to this input. The voltage range for the external reference is 2.5V ±1% for specified performance.

SCLK

Serial Clock. Provides the serial clock for accessing data from the part. This clock input is also used as the clock source for the ADC conversion process
to 5.25V Supply Input. For the [0V to 2 x VREFIN] range, VDD must be between and 5.25V
see Figure 2

VDRIVE

Logic Power Supply Input. The voltage supplied at this pin determines the operating voltage of the AS1543/44 serial interface. VDRIVE VDD required.

Digital Output. The ADC conversion result is provided serially on this output. Data bits are
clocked out on the falling edge of SCLK. The data stream consists of four address bits

DOUT indicating the corresponding conversion channel, followed by 12 bits of conversion data MSB first . Output coding may be selected as straight binary or two’s complement
depending on the setting of bit CODING page

Digital Input. Data is clocked into to the AS1543/44 control register on this input see DIN Control Register on page
Data Sheet - Ordering Information
11 Ordering Information

The device is available as the standard products shown in Table
Table Ordering Information

Model AS1543-BTST

Marking AS1543

Delivery Form
8-Channel, 1 Msps, 12-Bit ADC with Sequencer Tape and Reel

AS1544-BTST AS1544 4-Channel, 1 Msps, 12-Bit ADC with Sequencer Tape and Reel

Package TQFN 4x4 -20 TQFN 4x4 -20
28 - 29

AS1543/44

Data Sheet

Copyrights

Copyright 1997-2008, 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:
29 - 29

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 AS1544-BQFT Datasheet file may be downloaded here without warranties.

Datasheet ID: AS1544-BQFT 519647