參數資料
| 型號： | ADS1222IPWTG4 |
| 廠商： | Texas Instruments |
| 文件頁數： | 1/26頁 |
| 文件大小： | 0K |
| 描述： | IC 24BIT ADC W/2CH MUX 14-TSSOP |
| 產品培訓模塊： | Data Converter Basics |
| 視頻文件： | Nuts and Bolts of the Delta-Sigma Converter |
| 標準包裝： | 250 |
| 位數： | 24 |
| 采樣率（每秒）： | 240 |
| 數據接口： | 串行 |
| 轉換器數目： | 1 |
| 功率耗散（最大）： | 2.25mW |
| 電壓電源： | 模擬和數字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 14-TSSOP |
| 包裝： | 帶卷 (TR) |
| 輸入數目和類型： | 4 個單端，單極；2 個差分，雙極 |
SBAS314B APRIL 2004 REVISED JANUARY 2009
24Bit AnalogtoDigital Converter
with 2Channel Differential Input Multiplexer
ADS1222
FEATURES
D 240SPS Data Rate with 4MHz Clock
D 20-Bit Effective Resolution
D Input Multiplexer with Two Differential
Channels
D Pin-Selectable, High-Impedance Input Buffer
D ±5V Differential Input Range
D 0.0003% INL (typ), 0.0015% INL (max)
D Self-Calibrating
D Simple 2-Wire Serial Interface
D On-Chip Temperature Sensor
D Single Conversions with Standby Mode
D Low Current Consumption: 300A
D Analog Supply: 2.7V to 5.5V
APPLICATIONS
D Hand-Held Instrumentation
D Portable Medical Equipment
D Industrial Process Control
D Weigh Scales
DESCRIPTION
The ADS1222 is a 2-channel, 24-bit, delta-sigma ana-
log-to-digital (A/D) converter. It offers excellent perfor-
mance and low power in a TSSOP-14 package. The
ADS1222 is well-suited for demanding, high-resolution
measurements, especially in portable systems and oth-
er space-saving and power-constrained applications.
A delta-sigma (
Σ) modulator and digital filter form the
basis of the A/D converter. The analog modulator has
a
±5V differential input range. An input multiplexer
(MUX) is used to select between two separate
differential input channels. A buffer can be selected to
increase the input impedance of the measurement.
A simple, 2-wire serial interface provides all the
necessary control. Data retrieval, self-calibration, and
Standby mode are handled with a few simple
waveforms. When only single conversions are needed,
the ADS1222 can be quickly shut down (Standby mode)
while idle between measurements to dramatically
reduce the overall power consumption. Multiple
ADS1222s can be connected together to create a
synchronously sampling multichannel measurement
system. The ADS1222 is designed to easily connect to
microcontrollers, such as the MSP430.
The ADS1222 supports 2.7V to 5.5V supplies. Power
is typically less than 1mW in 3V operation and less than
1
W during Standby mode.
Mux
Digital Filter
and
Serial Interface
Σ
Modulator
VREFP VREFN
Buffer
VDD
GND
MUX
AINP1
AINN1
AINP2
AINN2
CLK
DRDY/DOUT
SCLK
TEMPEN
BUFEN
www.ti.com
Copyright
20042008, Texas Instruments Incorporated
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.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
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| ADS1224IPWRG4 | 功能描述:模數轉換器 - ADC 24-bit 240SPS RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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