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AD7687BRMZ

更新时间: 2024-11-21 12:52:23
品牌 Logo 应用领域
亚德诺 - ADI 转换器模数转换器光电二极管PC
页数 文件大小 规格书
28页 469K
描述
16-Bit, 1.5 LSB INL, 250 kSPS PulSAR™ Differential ADC in MSOP/QFN

AD7687BRMZ 数据手册

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16-Bit, 1.5 LSB INL, 250 kSPS PulSAR™  
Differential ADC in MSOP/QFN  
Data Sheet  
AD7687  
FEATURES  
16-bit resolution with no missing codes  
Throughput: 250 kSPS  
APPLICATION DIAGRAM  
0.5V TO 5V  
2.5 TO 5V  
INL: ±0.4 LSB typ, ±1.5 LSB max (±23 ppm of FSR)  
Dynamic range: 96.5 dB  
S/(N + D): 95.5 dB @ 20 kHz  
THD: −118 dB @ 20 kHz  
True differential analog input range  
±±REF  
VREF  
0
VIO  
1.8V TO VDD  
REF VDD  
SDI  
SCK  
SDO  
CNV  
IN+  
AD7687  
3- OR 4-WIRE INTERFACE  
(SPI, DAISY CHAIN, CS)  
IN–  
VREF  
0
GND  
0 ± to ±REF with ±REF up to ±DD on both inputs  
No pipeline delay  
Figure 2.  
Single-supply 2.3 ± to 5.5 ± operation with  
1.8 ±/2.5 ±/3 ±/5 ± logic interface  
Serial interface SPI®/QSPI™/MICROWIRE™/DSP-compatible  
Daisy-chain multiple ADCs and BUSY indicator  
Power dissipation  
1.35 mW @ 2.5 ±/100 kSPS, 4 mW @ 5 ±/100 kSPS, and  
1.4 μW @ 2.5 ±/100 SPS  
Standby current: 1 nA  
Table 1. MSOP, QFN (LFCSP)/SOT-23 16-Bit PulSAR ADC  
Type  
100 kSPS  
AD7684  
AD7683  
250 kSPS  
AD7687  
AD7685  
AD7694  
500 kSPS  
AD7688  
AD7686  
True Differential  
Pseudo  
Differential/Unipolar  
Unipolar  
AD7680  
10-lead MSOP (MSOP-8 size) and  
3 mm × 3 mm QFN (LFCSP) (SOT-23 size)  
Pin-for-pin compatible with AD7685, AD7686, and AD7688  
GENERAL DESCRIPTION  
The AD7687 is a 16-bit, charge redistribution, successive  
approximation, analog-to-digital converter (ADC) that operates  
from a single power supply, VDD, between 2.3 V to 5.5 V. It  
contains a low power, high speed, 16-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 the voltage difference between IN+  
and IN− pins. The voltages on these pins usually swing in  
opposite phase between 0 V to REF. The reference voltage, REF,  
is applied externally and can be set up to the supply voltage.  
APPLICATIONS  
Battery-powered equipment  
Data acquisitions  
Instrumentation  
Medical instruments  
Process controls  
1.5  
POSITIVE INL = +0.32LSB  
NEGATIVE INL = –0.41LSB  
1.0  
Its power scales linearly with throughput.  
0.5  
0
The SPI-compatible serial interface also features the ability,  
using the SDI input, to daisy-chain several ADCs on a single,  
3-wire bus and 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.  
–0.5  
The AD7687 is housed in a 10-lead MSOP or a 10-lead QFN  
(LFCSP) with operation specified from −40°C to +85°C.  
–1.0  
–1.5  
0
16384  
32768  
CODE  
49152  
65535  
Figure 1. Integral Nonlinearity vs. Code  
Rev. B  
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  
www.analog.com  
Fax: 781.461.3113 ©2005–2011 Analog Devices, Inc. All rights reserved.  
 

AD7687BRMZ 替代型号

型号 品牌 替代类型 描述 数据表
AD7687BRMZRL7 ADI

完全替代

16-Bit, 1.5 LSB INL, 250 kSPS PulSAR™ Differential ADC in MSOP/QFN
AD7685BRMZ ADI

类似代替

16-Bit, 250 kSPS PulSAR ADC in MSOP/QFN
AD7691BRMZ ADI

类似代替

18-Bit, 1.5 LSB INL, 250 kSPS PulSAR Differential ADC in MSOP/QFN

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