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ADS1258 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
描述:
24 位快速通道循环 Δ-Σ ADC
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P5P6Hot
原理图在P13P17P18
封装尺寸在P47P49P50
型号编码规则在P2
标记信息在P47
封装信息在P2P47P48P49P50
技术参数、封装参数在P2
应用领域在P1P14P41P48P54
电气规格在P3P4
导航目录
ADS1258数据手册
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ADS1258
24−Bit
ADC
Digital
Filter
Internal
Monitoring
16:1
Analog
Input
MUX
1
16
AINCOM
…
ADC
IN
Extclk
In/Out
AVSS DGND
32.768kHz
AVDD DVDD
MUX
OUT
SPI
Interface
CS
DRDY
SCLK
DIN
DOUT
ControlOscillator
GPIO
START
RESET
PWDN
GPIO[7:0]V
REF
ADS1258
Analog Inputs
ADS1258
www.ti.com
SBAS297G –JUNE 2005– REVISED MARCH 2011
16-Channel, 24-Bit Analog-to-Digital Converter
Check for Samples: ADS1258
1
FEATURES
DESCRIPTION
The ADS1258 is a 16-channel (multiplexed),
23
• 24 Bits, No Missing Codes
low-noise, 24-bit, delta-sigma (ΔΣ) analog-to-digital
• Fixed-Channel or Automatic Channel Scan
converter (ADC) that provides single-cycle settled
• Fixed-Channel Data Rate: 125kSPS
data at channel scan rates from 1.8k to 23.7k
samples per second (SPS) per channel. A flexible
• Auto-Scan Data Rate: 23.7kSPS/Channel
input multiplexer accepts combinations of eight
• Single-Conversion Settled Data
differential or 16 single-ended inputs with a full-scale
• 16 Single-Ended or 8 Differential Inputs
differential range of 5V or true bipolar range of ±2.5V
when operating with a 5V reference. The fourth-order
• Unipolar (+5V) or Bipolar (±2.5V) Operation
delta-sigma modulator is followed by a fifth-order sinc
• Low Noise: 2.8μV
RMS
at 1.8kSPS
digital filter optimized for low-noise performance.
• 0.0003% Integral Nonlinearity
The differential output of the multiplexer is accessible
• DC Stability (typical):
to allow signal conditioning prior to the input of the
0.02μV/°C Offset Drift, 0.4ppm/°C Gain Drift
ADC. Internal system monitor registers provide
• Open-Sensor Detection
supply voltage, temperature, reference voltage, gain,
and offset data.
• Conversion Control Pin
• Multiplexer Output for External Signal
An onboard PLL generates the system clock from a
32.768kHz crystal, or can be overridden by an
Conditioning
external clock source. A buffered system clock output
• On-Chip Temperature, Reference, Offset, Gain,
(15.7MHz) is provided to drive a microcontroller or
and Supply Voltage Readback
additional converters.
• 42mW Power Dissipation
Serial digital communication is handled via an SPI™
• Standby, Sleep, and Power-Down Modes
-compatible interface. A simple command word
• 8 General-Purpose Inputs/Outputs (GPIO)
structure controls channel configuration, data rates,
digital I/O, monitor functions, etc.
• 32.768kHz Crystal Oscillator or External Clock
Programmable sensor bias current sources can be
APPLICATIONS
used to bias sensors or verify sensor integrity.
• Medical, Avionics, and Process Control
The ADS1258 operates from a unipolar +5V or
• Machine and System Monitoring
bipolar ±2.5V analog supply and a digital supply
compatible with interfaces ranging from 2.7V to
• Fast Scan Multi-Channel Instrumentation
5.25V. The ADS1258 is available in a QFN-48
• Industrial Systems
package.
• Test and Measurement Systems
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2SPI is a trademark of Motorola, Inc.
3All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2005–2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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