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| 型号： | AS8501-ASOU |
| 厂商： | ams |
| 文件页数： | 12/41页 |
| 文件大小： | 0K |
| 描述： | IC DATA ACQ 16-SOIC |
| 特色产品： | AS8501 High Precision Data Acquisition Ics |
| 标准包装： | 46 |
| 类型： | 数据采集系统（DAS） |
| 输入类型： | 模拟，数字 |
| 输出类型： | 模拟，数字 |
| 接口： | 串行 |
| 电流 - 电源： | 5mA |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 管件 |
| 产品目录页面： | 803 (CN2011-ZH PDF) |
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1.1
2
3
DATA SHEET
Revision 1.1, 04-April-06
www.austriamicrosystems.com
Page 1 of 40
1
Features
16 bits resolution
Differential inputs
Single + 5V supply
Low power 15 mW
SOIC16 package
Self- and system-calibration
with auto-calibration on power up
16 kHz maximum sampling frequency
Internal temperature measurement
Internal factory trimmed precision reference
Programmable current sources
Digital comparator
Active wake-up
PGA gains 1, 6, 24, 50, 100
Zero offset
Zero offset TC
Extremely low noise
Internal oscillator with comparator for active wake up
3-wire serial interface,
!P compatible
Temperature range – 40 to + 125 °C
Individual 24-bit serial number
2
Applications
Battery management for automotive systems
Power management
mV/V-meter
High-precision voltage and current measurement
3
General description
The AS8501 is a complete, low power data acquisition system
for very small signals (i.e. voltages from shunt resistors,
thermocouples) that operates on a single 5 V power supply. The
chip powers up with a set of default conditions at which time it
can be operated as a read-only-converter. Reprogramming is at
any time possible by just writing into two internal registers via
the serial interface.
The AS8501 has four ground refering inputs which can be
switched separately to the internal PGA. Two input channels can
also be operated as a fully differential ground free input. The
system can measure both positive and negative input signals.
The PGA amplification ranges from 6 to 100 which enables the
system to measure signals from 7mV to 120 mV full scale range
with high accuracy, linearity and speed.
The chip contains a high precision bandgap reference and an
active offset compensation that makes the system offset free
(better than 0,5
!V) and the offset-TC value negligible. The built-
in programmable digital filter allows an effective noise
suppression if the high speed is not necessary in the application.
The input noise density is only 35 nV / Hz and due to
the high internal chopping frequency the system is free of 1/f-noise down
to DC.The 0-10 Hz noise is typical below 1 V i.e. as good or better than
any other available chopper amplifier.
For high speed synchronous measurements the chip can run in an
automatic switching mode between two input channels with pre-
programmed parameter sets.
The circuit has been optimised for the application in battery management
systems in automotive systems. As a front end data acquisition system it
allows an high quality measurement of current, voltage and temperature
of the battery.
With a high quality 100
!" resistor the system can handle the starter
current of up to 1500 A, a continuous current of
# 300 A as well as the
very low idle current of a few mA in the standby mode.
For external temperature measurement the chip can use a wide variety of
different temperature sensors such as RTD, PTC, NTC, thermocouples or
even diodes or transistors. A built-in programmable current source can be
switched to any input and activate these sensors without the need of
other external components.
The measurement of the chip temperature with the integrated internal
temperature sensor allows in addition the temperature compensation of
sensitive parameters which increases the total accuracy considerably.
Sensor specific data can be stored in the internal Zener-Zap memory and
are used to calibrate each measurement in the internal data processing
unit before transmission to the external C via the serial SDI interface.
The flexibility of the system is further increased by a digital comparator
that can be assigned to any measured property
(current, voltage, temperature) and an active wake-up in the sleep-mode.
All analog input-terminals can be checked for wire break via the SDI-
interface.
INTERNAL TEMPERATURE
INPUT MUX
CHOPPER
PROTECTION
CURRENT
SOURCES
ETR
ETS
RSHH
RSHL
VBAT
16 BIT - CONVERTER
BUF
SERIAL INTERFACE / CONTROL REGISTERS
DSP
CONTROLLER
FILTER
INT. CLOCK
TIMER
CALIBRATION
DATA
COMPARATOR
1.26 V
REFERENCE
SCLK
SDAT
INTN
REF
AGND
VDDA
VSSA
VDDD
VSSD
CLK
EZPRG
PGA
and
LEVEL SHIFT
AS8501
Data Sheet
High precision voltage and current measurement sensor interface
Figure 1: Functional Block Diagram
ams
AG
Technical
content
still
valid
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AS8501T&R | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:High precision voltage and current measurement sensor interface |
| AS8501TR | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:High precision voltage and current measurement sensor interface |
| AS8501TUB | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:High precision voltage and current measurement sensor interface |
| AS85049-32-1 | 制造商:GLENAIR 制造商全称:Glenair, Inc. 功能描述:90° Adapter, Non-Environmental, RFI |
| AS8506 | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:Battery Cell Monitor and Balancer IC |
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