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AD7946BRM-RL7 PDF预览

AD7946BRM-RL7

更新时间： 2024-09-13 14:51:03
品牌 Logo 应用领域
亚德诺 - ADI 光电二极管转换器
页数 文件大小 规格书
24页 437K
描述
1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO10, MO-187-BA, MSOP-10

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AD7946BRM-RL7 数据手册

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14-Bit, 500 kSPS PulSAR®  
ADC in MSOP  
AD7946  
APPLICATION DIAGRAM  
FEATURES  
0.5V TO 5V  
5V  
14-bit resolution with no missing codes  
Throughput: 500 kSPS  
INL: 0.4 LSB typ, 1 LSB max ( 0.0061% of FSR)  
S/(N + D): 85 dB @ 20 kHz  
THD: −100 dB @ 20 kHz  
Pseudo-differential analog input range  
0 V to VREF with VREF up to VDD  
No pipeline delay  
VIO  
SDI  
1.8V TO VDD  
REF VDD  
0 TO VREF  
IN+  
IN–  
SCK  
SDO  
CNV  
AD7946  
3- OR 4-WIRE INTERFACE  
(SPI, DAISY CHAIN, CS)  
GND  
Single-supply 5 V operation with  
1.8 V/2.5 V/3 V/5 V logic interface  
Serial interface SPI®/QSPI™/MICROWIRE™/DSP-compatible  
Daisy-chain multiple ADCs and BUSY indicator  
Power dissipation  
Figure 1.  
GENERAL DESCRIPTION  
The AD7946 is a 14-bit, charge redistribution, successive  
approximation, analog-to-digital converter (ADC),which  
operates from a single 5 V power supply, VDD. It contains a low  
power, high speed, 14-bit sampling ADC with no missing codes,  
an internal conversion clock, and a versatile serial interface  
port. The part also contains a low noise, wide bandwidth, short  
aperture delay track-and-hold circuit. On the CNV rising edge,  
it samples an analog input IN+ between 0 V to REF with respect  
to a ground sense IN−. The reference voltage, REF, is applied  
externally and can be set up to the supply voltage.  
3.3 mW @ 5 V/100 kSPS  
3.3 μW @ 5 V/100 SPS  
Standby current: 1 nA  
10-lead MSOP (MSOP-8 size) and  
3 mm × 3 mm QFN1 (LFCSP) (SOT-23 size)  
Pin-for-pin compatible with the 16-bit AD7686  
APPLICATIONS  
Battery-powered equipment  
Data acquisitions  
Instrumentation  
Its power scales linearly with throughput.  
Medical instruments  
Process controls  
The SPI-compatible serial interface also features the ability,  
using the SDI input, to daisy-chain several ADCs on a single,  
3-wire bus or it provides an optional BUSY indicator. It is  
compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate  
supply VIO.  
Table 1. MSOP, QFN1 (LFCSP)/SOT-23 14- and16-Bit ADC  
100  
kSPS  
250  
kSPS  
500  
kSPS  
ADC  
Driver  
Type  
16-Bit True  
Differential  
AD7684 AD76872 AD76882  
The AD7946 is housed in a 10-lead MSOP or a 10-lead QFN1  
(LFCSP) with operation specified from −40°C to +85°C.  
16-Bit Pseudo  
AD7683 AD76852 AD76862 ADA4841  
AD7694  
Differential/Unipolar  
16-Bit Unipolar  
14-Bit Pseudo  
1 The QFN package is in development. Contact sales for samples and  
AD7680  
ADA4841  
availability.  
2 Pin-for-pin compatible.  
AD79422 AD79462 ADA4841  
Differential/Unipolar  
14-Bit Unipolar  
AD7940  
ADA4841  
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  
© 2005 Analog Devices, Inc. All rights reserved.  
 
 
 
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AD7946BRM-RL7 替代型号

型号 品牌 替代类型 描述 数据表
AD7946BRMZRL7 ADI

完全替代

 PulSAR ADC in MSOP and LFCSP
AD7942BCPZRL7 ADI

完全替代

 14-Bit, 250 kSPS PulSAR®, Pseudo Differential ADC in MSOP/LFCSP
AD7946BRMZ ADI

完全替代

 14-Bit, 500 kSPS PulSAR ADC in MSOP

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