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AD7381-4BCPZ

更新时间： 2024-11-24 02:48:55
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亚德诺 - ADI /
页数 文件大小 规格书
31页 638K
描述
Differential Input, Quad,14-Bit, Simultaneous Sampling, SAR ADC

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AD7381-4BCPZ 数据手册

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Differential Input, Quad,14-Bit,  
Simultaneous Sampling, SAR ADC  
Data Sheet  
AD7381-4  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
V
REFIO  
REFCAP REFGND  
V
LOGIC  
CC  
14-bit ADC family  
Quad simultaneous sampling  
Fully differential analog inputs  
Wide common-mode range  
High throughput rate: 4 MSPS  
Buffered 2.5 V internal voltage reference (10 ppm/°C maximum)  
On-chip oversampling function  
INL (maximum): 1.5 LSB  
SNR (typical)  
85.3 dB at VREF = 3.3 V  
90.6 dB at OSR = 8× rolling average oversampling, RES = 1  
2-bit resolution boost  
REGCAP  
LDO  
REF  
A
A
A+  
A–  
IN  
OSC  
ADC A  
OVERSAMPLING  
IN  
SDOA  
SDOB  
SDOC  
A
A
B+  
B–  
IN  
OVERSAMPLING  
OVERSAMPLING  
OVERSAMPLING  
ADC B  
ADC C  
IN  
INTERFACE  
AND  
CONTROL  
LOGIC  
SDOD/  
ALERT  
A
A
C+  
C–  
IN  
SCLK  
SDI  
IN  
CS  
A
A
D+  
D–  
IN  
ADC D  
GND  
ALERT  
AD7381-4  
Out of range indicator (  
)
IN  
High-speed serial interface  
−40°C to +125°C operation  
4 mm × 4 mm, 24-lead LFCSP  
GND  
Figure 1.  
APPLICATIONS  
Motor control position feedback  
Motor control current sense  
Data acquisition systems  
Erbium doped fiber amplifier (EDFA) applications  
In phase and quadrature demodulation  
GENERAL DESCRIPTION  
The AD7381-4 a 16-bit, quad, simultaneous sampling, high  
speed, successive approximation register (SAR), analog-to-digital  
converter (ADC) that operates from a 3.0 V to 3.6 V power  
supply and features throughput rates up to 4 MSPS. The analog  
input type is differential, accepts a wide common-mode input  
voltage, and the analog inputs are sampled and converted on  
The AD7381-4 is available in a 24-lead lead frame chip scale  
package (LFCSP) with operation specified from −40°C to +125°C.  
Table 1. Related Devices  
No. of Channels  
Input Type  
16 Bits  
14 Bits  
4
Differential  
AD7380-4  
AD7389-4  
AD7380  
AD4680  
AD4681  
AD7386  
AD7381-4  
CS  
the falling edge of  
.
2
Differential  
AD7381  
AD7387  
The AD7381-4 has on-chip oversampling blocks to improve  
dynamic range and reduce noise at lower bandwidths. The  
oversampling can boost up to two bits of added resolution. A  
buffered internal 2.5 V reference (10 ppm/°C) is included.  
Alternatively, an external reference up to 3.3 V can be used.  
Single-ended  
PRODUCT HIGHLIGHTS  
The conversion process and data acquisition use standard  
control inputs allowing for easy interfacing to microprocessors  
or digital signal processors (DSPs). The conversion result can  
clock out simultaneously via 4-wire mode for faster throughput  
or via 1-wire serial mode when slower throughput is allowed.  
The device is compatible with 1.8 V, 2.5 V, and 3.3 V interfaces,  
using the separate logic supply.  
1. Quad simultaneous sampling and conversion.  
2. Pin-compatible product family.  
3. High throughput rate, 4 MSPS at 14-bit.  
4. Space-saving, 4 mm × 4 mm LFCSP.  
5. Integrated oversampling block to increase dynamic range,  
reduce noise and reduce SCLK speed requirements.  
6. Differential analog inputs with wide common-mode range.  
7. Small sampling capacitor reduces amplifier drive burden.  
Rev. 0  
Document Feedback  
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 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  
Technical Support  
©2022 Analog Devices, Inc. All rights reserved.  
www.analog.com  
 
 
 
 
 
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