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AD7621 PDF预览

AD7621

更新时间: 2024-11-18 22:38:59
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
26页 261K
描述
16-Bit, 1 LSB INL, 3 MSPS PulSAR ADC

AD7621 数据手册

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PRELIMINARY TECHNICAL DATA  
16-Bit, 1 LSB INL, 3 MSPS PulSARTM ADC  
a
PreliminaryTechnicalData  
AD7621  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
16 Bits Resolution with No Missing Codes  
No Pipeline Delay ( SAR architecture )  
Differential Input Range: VREF (VREF up to 2.5V)  
Throughput:  
3 MSPS (Wideband Warp and Warp Mode)  
2 MSPS (Normal Mode)  
REF  
REFGND  
TEMP REFBUFIN  
DVDD DGND  
AGND  
AVDD  
OVDD  
AD7621  
SERIAL  
PORT  
OGND  
REF  
SER/PAR  
1.25 MSPS (Impulse Mode)  
16  
IN+  
IN-  
SWITCHED  
CAP DAC  
D[15:0]  
BUSY  
INL: 1 LSB Max (0.0015% of Full-Scale)  
S/(N+D): 90 dB Typ @ 100 kHz ( VREF = 2.5V )  
THD: –100 dB Typ @ 100 kHz  
Parallel (16 or 8bits bus) and Serial 5V/3.3V/2.5V Interface  
SPI/QSPI/MICROWIRE/DSP Compatible  
On-board Low Drift Reference with Buffer and Temperature  
sensor  
PARALLEL  
INTERFACE  
RD  
CS  
PDREF  
CLOCK  
PDBUF  
PD  
CONTROL LOGIC AND  
CALIBRATION CIRCUITRY  
OB/2C  
BYTESWAP  
RESET  
Single 2.5 V Supply Operation  
WARP IMPULSE  
CNVST  
Power Dissipation: 100 mW Typ @ 3 MSPS  
Power-Down Mode  
Package: 48-Lead Quad Flat Pack (LQFP)  
48-Lead Frame Chip Scale Package (LFCSP)  
Speed Upgrade of the AD7677  
PulSAR Selection  
500 - 570  
Type / kSPS 100 - 250  
800 - 1000 >1000  
Pseudo  
AD7651  
AD7650/52 AD7653  
APPLICATIONS  
Differential AD7660/61 AD7664/66 AD7667  
Medical Instruments  
High Speed Data Acquisition  
Communications  
Instrumentation  
Spectrum Analysis  
ATE  
True Bipolar  
AD7663  
AD7675  
AD7665  
AD7676  
AD7671  
True  
Differential  
AD7677 AD7621  
18 Bit  
AD7678  
AD7679  
AD7654  
AD7674  
AD7655  
Multichannel  
/
Simultaneous  
PRODUCT HIGHLIGHTS  
GENERAL DESCRIPTION  
1. High resolution and Fast Throughput  
The AD7621 is a 3 MSPS, charge redistribution,  
16-bit SAR ADC ( no latency ).  
The AD7621 is a 16-bit, 3 MSPS, charge redistribution  
SAR, fully differential analog-to-digital converter that  
operates from a single 2.5 V power supply. The part  
contains a high-speed 16-bit sampling ADC, an internal  
conversion clock, an internal reference buffer, error  
correction circuits, and both serial and parallel system  
interface ports.  
2. Excellent accuracy  
The AD7621 has a maximum integral nonlinearity of 1  
LSB with no missing 16-bit code.  
3. Single-Supply Operation  
It features a very high sampling rate mode (Wideband  
Warp) for undersampling applications and, for asyn-  
chronous conversion rate applications, a fast mode  
(Normal) and, for low power applications, a reduced  
power mode (Impulse) where the power is scaled with  
the throughput.  
The AD7621 operates from a single 2.5 V supply and  
typically dissipates only 100 mW. In impulse mode,  
its power dissipation decreases with the throughput and  
it features a power-down mode.  
5. Serial or Parallel Interface  
Versatile parallel (16 or 8 bits bus) or 2-wire serial  
interface arrangement compatible with either 2.5V,  
3.3V or 5 V logic.  
It is available in a 48-lead LQFP or a 48-lead LFCSP  
with operation specified from –40°C to +85°C.  
REV. Pr D  
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  
which may result from its use. No license is granted by implication or  
otherwise under any patent or patent rights of Analog Devices.  
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  
© Analog Devices, Inc., 2003  

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