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AD7938BCP-6REEL7

更新时间： 2024-02-02 02:33:14
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
32页 928K
描述
8-Channel, 625 kSPS, 12-Bit Parallel ADCs with a Sequencer

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AD7938BCP-6REEL7 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：QFN
包装说明：5 X 5 MM, MO-220VHHD-2, LFCSP-32针数：32
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.52
最大模拟输入电压：5 V最小模拟输入电压：
转换器类型：ADC, SUCCESSIVE APPROXIMATIONJESD-30 代码：S-XQCC-N32
JESD-609代码：e0长度：5 mm
最大线性误差 (EL)：0.0244%湿度敏感等级：3
模拟输入通道数量：8位数：12
功能数量：1端子数量：32
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：PARALLEL, WORD
封装主体材料：UNSPECIFIED封装代码：HVQCCN
封装等效代码：LCC32,.2SQ,20封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：240
电源：3/5 V认证状态：Not Qualified
采样速率：0.625 MHz采样并保持/跟踪并保持：TRACK
座面最大高度：1 mm子类别：Analog to Digital Converters
标称供电电压：3 V表面贴装：YES
温度等级：INDUSTRIAL端子面层：Tin/Lead (Sn85Pb15)
端子形式：NO LEAD端子节距：0.5 mm
端子位置：QUAD处于峰值回流温度下的最长时间：30
宽度：5 mmBase Number Matches：1

AD7938BCP-6REEL7 数据手册

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8-Channel, 625 kSPS, 12-Bit  
Parallel ADCs with a Sequencer  
AD7938-6  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
Fast throughput rate: 625 kSPS  
Specified for VDD of 2.7 V to 5.25 V  
Low power  
3.6 mW max at 625 kSPS with 3 V supplies  
7.5 mW max at 625 kSPS with 5 V supplies  
8 analog input channels with a sequencer  
Software configurable analog inputs  
8-channel single-ended inputs  
V
AGND  
DD  
AD7938-6  
V
REFIN/  
V
REFOUT  
2.5V  
VREF  
V
0
7
IN  
IN  
CLKIN  
12-BIT  
SAR ADC  
AND  
CONTROL  
I/P  
MUX  
CONVST  
T/H  
BUSY  
V
4-channel fully differential inputs  
4-channel pseudo-differential inputs  
7-channel pseudo-differential inputs  
Accurate on-chip 2.5 V reference  
0.2ꢀ max @ 25°C, 25 ppm/°C max  
70 dB SINAD at 50 kHz input frequency  
No pipeline delays  
SEQUENCER  
V
PARALLEL INTERFACE/CONTROL REGISTER  
DRIVE  
DB0 DB11  
CS RD WR W/B  
DGND  
High speed parallel interface—word/byte modes  
Full shutdown mode: 2 µA max  
32-lead LFCSP and TQFP package  
Figure 1.  
The AD7938-6 uses advanced design techniques to achieve very  
low power dissipation at high throughput rates. The part also  
features flexible power management options. An on-chip  
control register allows the user to set up different operating  
conditions, including analog input range and configuration,  
output coding, power management, and channel sequencing.  
GENERAL DESCRIPTION  
The AD7938-6 is a 12-bit high speed, low power, successive  
approximation (SAR) ADC. The part operates from a single  
2.7 V to 5.25 V power supply and features throughput rates up  
to 625 kSPS. The part contains a low noise, wide bandwidth,  
differential track-and-hold amplifier that can handle input  
frequencies up to 50 MHz.  
PRODUCT HIGHLIGHTS  
1. High throughput with low power consumption.  
2. Eight analog inputs with a channel sequencer.  
3. Accurate on-chip 2.5 V reference.  
4. Software configurable analog inputs. Single-ended, pseudo-  
differential, or fully differential analog inputs that are  
software selectable.  
The AD7938-6 features eight analog input channels with a  
channel sequencer that allows a preprogrammed selection of  
channels to be converted sequentially. The part can operate  
with either single-ended, fully differential, or pseudo-  
differential analog inputs.  
The conversion process and data acquisition are controlled  
using standard control inputs that allow easy interfacing with  
microprocessors and DSPs. The input signal is sampled on the  
5. Single-supply operation with VDRIVE function. The VDRIVE  
function allows the parallel interface to connect directly to  
3 V, or 5 V processor systems independent of VDD  
6. No pipeline delay.  
.
falling edge of  
and the conversion is also initiated at  
CONVST  
7. Accurate control of the sampling instant via a  
CONVST  
this point.  
input and once off conversion control.  
The AD7938-6 has an accurate on-chip 2.5 V reference that  
can be used as the reference source for the analog-to-digital  
conversion. Alternatively, this pin can be overdriven to provide  
an external reference.  
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  
registered trademarks are the property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.326.8703  
www.analog.com  
© 2004 Analog Devices, Inc. All rights reserved.  
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