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AD7321

更新时间: 2024-02-06 19:58:19
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
36页 561K
描述
500 kSPS, 2-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC

AD7321 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:TSSOP
包装说明:TSSOP,针数:14
Reach Compliance Code:unknown风险等级:5.76
Is Samacsys:N最大模拟输入电压:10 V
最小模拟输入电压:-10 V最长转换时间:1.6 µs
转换器类型:ADC, SUCCESSIVE APPROXIMATIONJESD-30 代码:R-PDSO-G14
JESD-609代码:e3长度:5 mm
最大线性误差 (EL):0.0269%湿度敏感等级:1
模拟输入通道数量:2位数:12
功能数量:1端子数量:14
最高工作温度:85 °C最低工作温度:-40 °C
输出位码:BINARY, 2'S COMPLEMENT BINARY输出格式:SERIAL
封装主体材料:PLASTIC/EPOXY封装代码:TSSOP
封装形状:RECTANGULAR封装形式:SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度(摄氏度):260采样速率:0.5 MHz
采样并保持/跟踪并保持:TRACK座面最大高度:1.2 mm
标称供电电压:3 V表面贴装:YES
技术:CMOS温度等级:INDUSTRIAL
端子面层:MATTE TIN端子形式:GULL WING
端子节距:0.65 mm端子位置:DUAL
处于峰值回流温度下的最长时间:40宽度:4.4 mm
Base Number Matches:1

AD7321 数据手册

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500 kSPS, 2-Channel, Software-Selectable,  
True Bipolar Input, 12-Bit Plus Sign ADC  
AD7321  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
V
REFIN/OUT  
V
12-bit plus sign SAR ADC  
DD  
CC  
True bipolar input ranges  
AD7321  
Software-selectable input ranges  
10 V, 5 V, 2.5 V, 0 V to +10 V  
500 kSPS throughput rate  
2.5V  
VREF  
V
V
0
1
13-BIT  
IN  
I/P  
MUX  
SUCCESSIVE  
APPROXIMATION  
ADC  
T/H  
Two analog input channels with channel sequencer  
IN  
Single-ended, true differential, and pseudo differential  
analog input capability  
High analog input impedance  
Low power: 17 mW  
Full power signal bandwidth: 22 MHz  
Internal 2.5 V reference  
DOUT  
SCLK  
CS  
CONTROL LOGIC  
AND REGISTERS  
CHANNEL  
SEQUENCER  
DIN  
High speed serial interface  
Power-down modes  
V
DRIVE  
14-lead TSSOP package  
iCMOSprocess technology  
AGND  
V
DGND  
SS  
Figure 1.  
GENERAL DESCRIPTION  
PRODUCT HIGHLIGHTS  
The AD73211 is a 2-channel, 12-bit plus sign successive  
approximation ADC designed on the iCMOS (industrial  
CMOS) process. iCMOS is a process combining high voltage  
silicon with submicron CMOS and complementary bipolar  
technologies. It enables the development of a wide range of high  
performance analog ICs capable of 33 ꢁ operation in a footprint  
that no previous generation of high voltage parts could achieve.  
Unlike analog ICs using conventional CMOS processes, iCMOS  
components can accept bipolar input signals while providing  
increased performance, dramatically reduced power  
1. The AD7321 can accept true bipolar analog input signals,  
±1, ±± , ±2, and ꢀ ꢁ to +1ꢀ ꢁ unipolar signals.  
2. The two analog inputs can be configured as two single-  
ended inputs, one true differential input pair, or one  
pseudo differential input.  
3. ±ꢀꢀ kSPS serial interface. SPI®-/QSPI™-/DSP-/MICROWIRE™-  
compatible interface.  
4. Low power, 17 mW, at a maximum throughput rate of  
±ꢀꢀ kSPS.  
consumption, and reduced package size.  
±. Channel sequencer.  
The AD7321 can accept true bipolar analog input signals. The  
AD7321 has four software-selectable input ranges, ±1, ±± ,  
±2, and ꢀ ꢁ to +1ꢀ . Each analog input channel can be  
independently programmed to one of the four input ranges.  
The analog input channels on the AD7321 can be programmed  
to be single-ended, true differential, or pseudo differential.  
Table 1. Similar Devices  
Device Throughput Number of bits  
Number Rate  
Number of  
Channels  
AD7329  
AD7328  
AD7327  
AD7324  
AD7323  
AD7322  
1000 kSPS  
12-bit plus sign  
12-bit plus sign  
12-bit plus sign  
12-bit plus sign  
12-bit plus sign  
12-bit plus sign  
8
8
8
4
4
2
1000 kSPS  
500 kSPS  
1000 kSPS  
500 kSPS  
1000 kSPS  
The ADC contains a 2.± ꢁ internal reference. The AD7321 also  
allows for external reference operation. If a 3 ꢁ reference is  
applied to the REFIN/OUT pin, the AD7321 can accept a true  
bipolar ±12 ꢁ analog input. Minimum ±12 ꢁ ꢁDD and ꢁSS  
supplies are required for the ±12 ꢁ input range. The ADC has a  
high speed serial interface that can operate at throughput rates  
up to ±ꢀꢀ kSPS.  
1 Protected by U.S. Patent No. 6,731,232.  
Rev. 0  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rights of third parties that may result from its use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2006 Analog Devices, Inc. All rights reserved.  
 

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