a 16-Bit, 570 kSPS CMOS ADC AD7665 FEATURES FUNCTIONAL BLOCK DIAGRAM Throughput AVDD AGND REF REFGND DVDD DGND 570 kSPS (Warp Mode) 500 kSPS (Normal Mode) 4R INL: 2.5 LSB Max ( 0.0038% of Full Scale) IND(4R) AD7665 OVDD 4R 16-Bit Resolution with No Missing Codes INC(4R) OGND 2R SERIAL S/(N+D): 90 dB Typ 180 kHz INB(2R) PORT R THD: 100 dB Typ 180 kHz INA(R) SWITCHED SER/PAR Analog Input Voltage Ranges CAP DAC INGND BUSY Bipolar: 10 V, 5 V, 2.5 V PARALLEL 16 D 15:0 Unipolar: 0 V to 10 V, 0 V to 5 V, 0 V to 2.5 V INTERFACE CLOCK Both AC and DC Specifications PD CS No Pipeline Delay RESET RD CONTROL LOGIC AND Parallel (8/16 Bits) and Serial 5 V/3 V Interface CALIBRATION CIRCUITRY OB/2C SPI /QSPI/MICROWIRE/DSP Compatible BYTESWAP Single 5 V Supply Operation WARP IMPULSE CNVST Power Dissipation 64 mW Typical 15 W 100 SPS PulSAR Selection Power-Down Mode: 7 W Max Package: 48-Lead Quad Flatpack (LQFP) Type/kSPS 100250 500570 8001000 Package: 48-Lead Chip Scale (LFCSP) Pseudo AD7660 AD7650 Pin-to-Pin Compatible Upgrade of the AD7664/AD7663 Differential AD7664 APPLICATIONS True Bipolar AD7663 AD7665 AD7671 Data Acquisition Communication True Differential AD7675 AD7676 AD7677 Instrumentation 18-Bit AD7678 AD7673 AD7674 Spectrum Analysis Simultaneous/ AD7654 AD7655 Medical Instruments Multichannel Process Control GENERAL DESCRIPTION It is fabricated using Analog Devices high performance, 0.6 micron The AD7665 is a 16-bit, 570 kSPS, 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 input scaler that allows various input ranges, an internal conver- PRODUCT HIGHLIGHTS sion clock, error correction circuits, and both serial and parallel 1. Fast Throughput system interface ports. The AD7665 is a very high speed (570 kSPS in Warp Mode and 500 kSPS in Normal Mode), charge redistribution, 16-bit The AD7665 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 AD7665 operates from a single 5 V supply, dissipates more traditional dc parameters of gain, offset, and linearity. only 64 mW typical, even lower when a reduced throughput It features a very high sampling rate mode (Warp), a fast mode is used with the reduced power mode (Impulse) and a power- (Normal) for asynchronous conversion rate applications, and for down mode. low power applications, a reduced power mode (Impulse) where 3. Superior INL the power is scaled with the throughput. The AD7665 has a maximum integral nonlinearity of 2.5 LSB 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: 781/461-3113 2011 Analog Devices, Inc. All rights reserved. registered trademarks are the property of their respective companies.(40 C to +85 C, AVDD = DVDD = 5 V, OVDD = 2.7 V to 5.25 V, unless otherwise noted.) AD7665SPECIFICATIONS 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 = 180 kHz 62 dB IN Input Impedance See Table I THROUGHPUT SPEED Complete Cycle In Warp Mode 1.75 s Throughput Rate In Warp Mode 1 570 kSPS Time between Conversions In Warp Mode 1 ms Complete Cycle In Normal Mode 2 s Throughput Rate In Normal Mode 0 500 kSPS Complete Cycle In Impulse Mode 2.25 s Throughput Rate In Impulse Mode 0 444 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 25 +25 LSB MIN MAX Impulse Modes Other Range or Mode 0.06 +0.06 % of FSR 2 Bipolar Full-Scale Error , T to T 0.25 +0.25 % 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 0.38 +0.38 % of FSR MIN MAX Power Supply Sensitivity AVDD = 5 V 5% 9.5 LSB AC ACCURACY 3 Signal-to-Noise f = 10 kHz 89 90 dB IN f = 180 kHz 90 dB IN Spurious-Free Dynamic Range f = 180 kHz 100 dB IN Total Harmonic Distortion f = 180 kHz 100 dB IN Signal-to-(Noise+Distortion) f = 10 kHz 88.5 90 dB IN f = 180 kHz, 60 dB Input 30 dB IN 3 dB Input Bandwidth 3.6 MHz SAMPLING DYNAMICS Aperture Delay 2ns Aperture Jitter 5 ps rms Transient Response Full-Scale Step 1 s REFERENCE External Reference Voltage Range 2.3 2.5 AVDD 1.85 V External Reference Current Drain 570 kSPS Throughput 114 A DIGITAL INPUTS Logic Levels V 0.3 +0.8 V IL V +2.0 DVDD + 0.3 V IH I 1 +1 A IL I 1 +1 A 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 A OVDD 0.6 V OH SOURCE POWER SUPPLIES Specified Performance AVDD 4.75 5 5.25 V DVDD 4.75 5 5.25 V 4 OVDD 2.7 5.25 V 5 Operating Current 570 kSPS Throughput AVDD 14 mA 6 DVDD 4.5 mA 6 OVDD 20 A C REV. 2