16-Bit, 1 LSB INL, 1 MSPS a Differential ADC AD7677 FEATURES FUNCTIONAL BLOCK DIAGRAM Throughput: 1 MSPS AVDD AGND REF REFGND DVDD DGND INL: 1 LSB Max ( 0.0015% of Full Scale) 16 Bits Resolution with No Missing Codes OVDD S/(N+D): 94 dB Typ 45 kHz AD7677 OGND THD: 110 dB Typ 45 kHz SERIAL Differential Input Range: 2.5 V PORT IN+ SWITCHED SER/PAR Both AC and DC Specifications CAP DAC IN BUSY No Pipeline Delay 16 Parallel (8 Bits/16 Bits) and Serial 5 V/3 V Interface DATA 15:0 PARALLEL Single 5 V Supply Operation CLOCK CS INTERFACE PD 115 mW Typical Power Dissipation, 15 W 100 SPS CONTROL LOGIC AND RD RESET CALIBRATION CIRCUITRY Power-Down Mode: 7 W Max OB/2C Packages: 48-Lead Quad Flatpack (LQFP) BYTESWAP 48-Lead Frame Chip Scale (LFCSP) WARP IMPULSE CNVST Pin-to-Pin Compatible Upgrade of the AD7664/AD7675/ AD7676 PulSAR Selection APPLICATIONS CT Scanners Type/kSPS 100250 500570 1000 Data Acquisition Instrumentation Pseudo AD7660 AD7650 Spectrum Analysis Differential AD7664 Medical Instruments True Bipolar AD7663 AD7665 AD7671 Battery-Powered Systems Process Control True Differential AD7675 AD7676 AD7677 GENERAL DESCRIPTION PRODUCT HIGHLIGHTS The AD7677 is a 16-bit, 1 MSPS, charge redistribution SAR, 1. Excellent INL fully differential, analog-to-digital converter that operates from a The AD7677 has a maximum integral nonlinearity of 1 LSB single 5 V power supply. The part contains a high speed 16-bit with a no missing 16-bit code. sampling ADC, an internal conversion clock, error correction 2. Superior AC Performances circuits, and both serial and parallel system interface ports. The AD7677 has a minimum dynamic of 92 dB, 94 dB typical. The AD7677 is hardware factory calibrated and comprehen- 3. Fast Throughput sively tested to ensure such ac parameters as signal-to-noise The AD7677 is a 1 MSPS, charge redistribution, 16-bit SAR ratio (SNR) and total harmonic distortion (THD), in addition ADC with internal error correction circuitry. to the more traditional dc parameters of gain, offset, and linearity. 4. Single-Supply Operation It features a very high sampling rate mode (Warp) a fast The AD7677 operates from a single 5 V supply and typically mode (Normal) for asynchronous conversion rate applica- dissipates only 115 mW. Its power dissipation decreases tions and, for low power applications, a reduced power mode with the throughput. It consumes 7 W maximum when in (Impulse) where the power is scaled with the throughput. power-down. The AD7677 is available in a 48-lead LQFP or a tiny 48-lead 5. Serial or Parallel Interface LFCSP with operation specified from 40C to +85C. Versatile parallel (8 bits or 16 bits) or 2-wire serial inter- face arrangement compatible with both 3 V or 5 V logic. REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. use, nor for any infringements of patents or other rights of third parties that Tel: 781/329-4700 www.analog.com may result from its use. No license is granted by implication or otherwise Fax: 781/326-8703 Analog Devices, Inc., 2002 under any patent or patent rights of Analog Devices.AD7677SPECIFICATIONS (40 C to +85 C, AVDD = DVDD = 5 V, OVDD = 2.7 V to 5.25 V, unless otherwise stated.) Parameter Conditions Min Typ Max Unit RESOLUTION 16 Bits ANALOG INPUT Voltage Range V V V +V V IN+ IN REF REF Operating Input Voltage V V to AGND 0.1 +3 V IN+, IN Analog Input CMRR f = 10 kHz 85 dB IN Input Current 1 MSPS Throughput 11 A Input Impedance See Analog Input Section THROUGHPUT SPEED Complete Cycle In Warp Mode 1 s Throughput Rate In Warp Mode 0.001 1 MSPS Time Between Conversions In Warp Mode 1 ms Complete Cycle In Normal Mode 1.25 s Throughput Rate In Normal Mode 0 800 kSPS Complete Cycle In Impulse Mode 1.5 s Throughput Rate In Impulse Mode 0 666 kSPS DC ACCURACY 1, 2 Integral Linearity Error 1 +1 LSB 2 Differential Linearity Error 1 +1 LSB No Missing Codes 16 Bits Transition Noise 0.35 LSB 3 +Full-Scale Error In Warp Mode 25 +25 LSB 3 Full Scale Error In Warp Mode 20 +20 LSB 3 Zero Error In Warp Mode 15 +15 LSB 3 +Full-Scale Error In Impulse or Normal Mode 40 +40 LSB 3 Full Scale Error In Impulse or Normal Mode 20 +20 LSB 3 Zero Error In Impulse or Normal Mode 23 +23 LSB Power Supply Sensitivity AVDD = 5 V 5% 1.4 LSB AC ACCURACY 2, 4 Signal-to-Noise f = 20 kHz 92 94 dB IN f = 45 kHz 94 dB IN 2 Spurious Free Dynamic Range f = 20 kHz 104.5 110 dB IN f = 45 kHz 110 dB IN 2 Total Harmonic Distortion f = 20 kHz 110 103.5 dB IN f = 45 kHz 110 dB IN 2 Signal-to-(Noise+Distortion) f = 20 kHz 92 94 dB IN f = 45 kHz 94 IN f = 45 kHz, 60 dB Input 34 dB IN 3 dB Input Bandwidth 15.8 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 37 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 Conversion Pipeline Delay Results Available Immediately after Completed Conversion V I = 1.6 mA 0.4 V OL SINK V I = 100 A OVDD 0.6 V OH SOURCE 2 REV. 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