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AD7641BSTZ

更新时间： 2024-11-29 04:30:47
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亚德诺 - ADI 转换器模数转换器PC
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描述
18-Bit 250/670 kSPS PulSAR Bipolar Programmable Inputs ADC

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AD7641BSTZ 数据手册

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18-Bit 250/670 kSPS PulSAR®  
Bipolar Programmable Inputs ADC  
Preliminary Technical Data  
AD7631/AD7634  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
TEMP REFBUFIN REF REFGND  
VEE  
DVDD DGND  
VCC  
Multiple pins/software programmable input ranges:  
±10ꢀ, ±±ꢀ, 10ꢀ, ±ꢀ  
iCMOS™ process technology  
OVDD  
AD7631/  
AD7634  
AGND  
AVDD  
OGND  
SPPEN  
SPPCLK  
SPPDATA  
HW/SW  
Pins or serial SPI input ranges/mode selection  
Throughput:  
670kSPS (AD7634)  
2±0kSPS (AD7631)  
INL: ± 1.7± LSB (7± ppm of full scale)  
DNL: +2/-1 LSB  
18-bit resolution with no missing codes  
Dynamic range: 102.± dB typical  
SNR: 101 dB typical  
REF  
SERIAL  
PROGRAMMABLE  
PORT  
REF AMP  
IN+  
IN-  
SWITCHED  
CAP DAC  
SERIAL DATA  
PORT  
18  
D[17:0]  
BUSY  
RD  
PDREF  
PDBUF  
PD  
CLOCK  
PARALLEL  
INTERFACE  
CONTROL LOGIC AND  
CALIBRATION CIRCUITRY  
CS  
RESET  
D0/OB/2C  
THD: -122 dB typical  
CNVST WARP IMPULSE  
MODE1  
MODE0  
±ꢀ internal reference: typical drift 7ppm/°C; TEMP output  
No pipeline delay (SAR architecture)  
Parallel (18, 16- or 8-bit bus) and serial ± ꢀ/3.3 ꢀ interface  
SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible  
Power dissipation:  
Figure 1.  
Table 1. PulSAR® Selection  
100 to  
±00 to  
±70  
6±0 to  
1000  
Type/kSPS  
2±0  
>1000  
190 mW @ 670kSPS  
7± mW @ 2±0kSPS  
Pb-free 48-lead LQFP and LFCSP (7x7mm) packages  
Pin compatible with other PulSAR ADCs  
Pseudo  
Differential  
AD7651,  
AD7660  
AD7661  
AD7650  
AD7652  
AD7664  
AD7666  
AD7653  
AD7667  
True Bipolar  
AD7610,  
AD7663  
AD7675  
AD7665  
AD7612,  
AD7671  
AD7677  
APPLICATIONS  
True  
AD7676  
AD7621  
AD7622  
AD7623  
AD7641  
AD7643  
Differential  
Process control  
High speed data acquisition  
Digital signal processing  
Spectrum analysis  
Instrumentation  
Communications  
18-Bit  
Multichannel/  
Simultaneous  
AD7631  
AD7678  
AD7679  
AD7634  
AD7674  
AD7654  
AD7655  
PRODUCT HIGHLIGHTS  
GENERAL DESCRIPTION  
1. Programmable input range and mode selection.  
The AD7631/AD7634 is an18-bit, charge redistribution  
successive approximation register (SAR) architecture analog-to-  
digital converter (ADC) with programmable input ranges and  
mode selection via a dedicated write only serial interface (or by  
hardware pin-strapping). The device is fabricated on ADI’s  
patented iCMOS high voltage process. The device contains a  
high speed 18-bit sampling ADC, an internal conversion clock,  
an internal reference (and buffer), and both serial and parallel  
system interface ports. Power consumption is automatically  
scaled with throughput (AD7634 in Impulse mode), making it  
ideal for battery-powered applications. It is available in Pb-free,  
48-lead packages with operation specified from −40°C to  
+85°C.  
Dedicated write only serial port used for selecting input  
range and mode select (mode select AD7634 only).  
2. Fast throughput  
The AD7634 is 670kSPS and the AD7631 is 250kSPS.  
3. Superior Linearity.  
No missing 18-bit code. +/- 1.75 LSB typical INL  
4. Internal Reference.  
5 V internal reference with a typical drift of 7 ppm/°C  
and on-chip TEMP sensor.  
5. Serial or Parallel Interface.  
Versatile parallel (18, 16- or 8-bit bus) or 2-wire serial  
interface arrangement compatible with 3.3 V, or 5 V logic.  
Rev. PrC  
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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AD7641BSTZ 替代型号

型号 品牌 替代类型 描述 数据表
AD7674AST ADI

完全替代

 18-Bit, 2.5 LSB INL, 800 kSPS SAR ADC
AD7679AST ADI

完全替代

 18-Bit, 2.5 LSB INL, 570 kSPS SAR ADC
AD7678ASTZ ADI

类似代替

 18-Bit,100 kSPS PulSAR® A/D Converter

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