a 16-Bit, 1 MSPS CMOS ADC AD7671 FEATURES FUNCTIONAL BLOCK DIAGRAM Throughput AVDD AGND REF REFGND DVDD DGND 1 MSPS (Warp Mode) 800 kSPS (Normal Mode) 4R IND(4R) AD7671 INL: 2.5 LSB Max ( 0.0038% of Full Scale) OVDD 4R INC(4R) 16-Bit Resolution with No Missing Codes OGND 2R SERIAL INB(2R) S/(N+D): 90 dB Typ 250 kHz PORT R INA(R) THD: 100 dB Typ 250 kHz SWITCHED SER/PAR CAP DAC Analog Input Voltage Ranges INGND BUSY Bipolar: 10 V, 5 V, 2.5 V PARALLEL 16 D 15:0 INTERFACE Unipolar: 0 V to 10 V, 0 V to 5 V, 0 V to 2.5 V CLOCK PD CS Both AC and DC Specifications RESET RD No Pipeline Delay CONTROL LOGIC AND CALIBRATION CIRCUITRY OB/2C Parallel (8/16 Bits) and Serial 5 V/3 V Interface SPI /QSPI/MICROWIRE/DSP Compatible BYTESWAP Single 5 V Supply Operation WARP IMPULSE CNVST Power Dissipation 112 mW Typical PulSAR Selection 15 W 100 SPS Power-Down Mode: 7 W Max Type/kSPS 100250 500570 8001000 Package: 48-Lead Quad Flatpack (LQFP) Pseudo AD7660 AD7650 Package: 48-Lead Chip Scale (LFCSP) Differential AD7664 Pin-to-Pin Compatible Upgrade of the AD7665/AD7664 True Bipolar AD7663 AD7665 AD7671 APPLICATIONS Data Acquisition True Differential AD7675 AD7676 AD7677 Communication 18-Bit AD7678 AD7679 AD7674 Instrumentation Spectrum Analysis Simultaneous/ AD7654 AD7655 Medical Instruments Multichannel Process Control GENERAL DESCRIPTION It is fabricated using Analog Devices high performance, 0.6 micron The AD7671 is a 16-bit, 1 MSPS, charge redistribution SAR, CMOS process and is available in a 48-lead LQFP and a tiny analog-to-digital converter that operates from a single 5 V power 48-lead LFCSP, with operation specified from 40C to +85C. supply. It contains a high speed 16-bit sampling ADC, a resistor PRODUCT HIGHLIGHTS input scaler that allows various input ranges, an internal 1. Fast Throughput conversion clock, error correction circuits, and both serial The AD7671 is a very high speed (1 MSPS in Warp Mode and parallel system interface ports. and 800 kSPS in Normal Mode), charge redistribution, 16-bit The AD7671 is hardware factory-calibrated and is comprehen- SAR ADC. sively tested to ensure such ac parameters as signal-to-noise ratio 2. Single-Supply Operation (SNR) and total harmonic distortion (THD), in addition to the The AD7671 operates from a single 5 V supply, dissipates more traditional dc parameters of gain, offset, and linearity. only 112 mW typical, even lower when a reduced throughput is used with the reduced power mode (Impulse) and a power- It features a very high sampling rate mode (Warp), a fast mode down mode. (Normal) for asynchronous conversion rate applications, and, for 3. Superior INL low power applications, a reduced power mode (Impulse) where The AD7671 has a maximum integral nonlinearity of 2.5 LSB the power is scaled with the throughput. with no missing 16-bit code. 4. Serial or Parallel Interface Versatile parallel (8 bits or 16 bits) or 2-wire serial interface REV. C arrangement compatible with both 3 V or 5 V logic. 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. may result from its use. No license is granted by implication or otherwise Tel: 781/329-4700 www.analog.com under any patent or patent rights of Analog Devices. Trademarks and Fax: 781/326-8703 Analog Devices, Inc. All rights reserved. registered trademarks are the property of their respective companies.AD7671SPECIFICATIONS (40 C to +85 C, AVDD = DVDD = 5 V, OVDD = 2.7 V to 5.25 V, unless otherwise noted.) Parameter Conditions Min Typ Max Unit RESOLUTION 16 Bits ANALOG INPUT Voltage Range V V 4 REF, 0 V to 4 REF, 2 REF (See Table I) IND INGND Common-Mode Input Voltage V 0.1 +0.5 V INGND Analog Input CMRR f = 100 kHz 74 dB IN Input Impedance See Table I THROUGHPUT SPEED Complete Cycle In Warp Mode 1 ms Throughput Rate In Warp Mode 1 1000 kSPS Time between Conversions In Warp Mode 1 ms Complete Cycle In Normal Mode 1.25 ms Throughput Rate In Normal Mode 0 800 kSPS Complete Cycle In Impulse Mode 1.5 ms Throughput Rate In Impulse Mode 0 666 kSPS DC ACCURACY 1 Integral Linearity Error 2.5 +2.5 LSB No Missing Codes 16 Bits Transition Noise 0.7 LSB 2 Bipolar Zero Error , T to T 5 V Range, Normal or 45 +45 LSB MIN MAX Impulse Modes Other Range or Mode 0.1 +0.1 % of FSR 2 Bipolar Full-Scale Error , T to T 0.38 +0.38 % of FSR MIN MAX 2 Unipolar Zero Error , T to T 0.18 +0.18 % of FSR MIN MAX 2 Unipolar Full-Scale Error , T to T 0.76 +0.76 % of FSR MIN MAX Power Supply Sensitivity AVDD = 5 V 5% 9.5 LSB AC ACCURACY 3 Signal-to-Noise f = 20 kHz 89 90 dB IN f = 250 kHz 90 dB IN Spurious-Free Dynamic Range f = 250 kHz 100 dB IN Total Harmonic Distortion f = 20 kHz 100 96 dB IN f = 250 kHz 100 dB IN Signal-to-(Noise+Distortion) f = 20 kHz 88.5 90 dB IN f = 250 kHz, 60 dB Input 30 dB IN 3 dB Input Bandwidth 9.6 MHz SAMPLING DYNAMICS Aperture Delay 2ns Aperture Jitter 5 ps rms Transient Response Full-Scale Step 250 ns REFERENCE External Reference Voltage Range 2.3 2.5 AVDD 1.85 V External Reference Current Drain 1 MSPS Throughput 200 mA DIGITAL INPUTS Logic Levels V 0.3 +0.8 V IL V +2.0 DVDD + 0.3 V IH I 1+1 mA IL I 1+1 mA IH DIGITAL OUTPUTS Data Format Parallel or Serial 16-Bit Pipeline Delay Conversion Results Available Immediately after Completed Conversion V I = 1.6 mA 0.4 V OL SINK V I = 570 mA OVDD 0.6 V OH SOURCE REV. C 2