Datasheet AD7677 (Analog Devices)

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16-Bit, 1 LSB INL, 1 MSPS 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 IN– CAP DAC No Pipeline Delay BUSY 16 Parallel (8 Bits/16 Bits) and Serial 5 V/3 V Interface DATA[15:0] Single 5 V Supply Operation CLOCK PARALLEL 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 Pin-to-Pin Compatible Upgrade of the AD7664/AD7675/ CNVST AD7676 APPLICATIONS PulSAR Selection CT Scanners Type/kSPS 100–250 500–570 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 µW 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 –40°C to +85°C. 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 use, nor for any infringements of patents or other rights of third parties that
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Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM PulSAR Selection GENERAL DESCRIPTION PRODUCT HIGHLIGHTS SPECIFICATIONS Table I. Serial Clock Timings in Master Read after Convert ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE PIN FUNCTION DESCRIPTIONS PIN CONFIGURATION Typical Performance Characteristics CIRCUIT INFORMATION CONVERTER OPERATION Modes of Operation Transfer Functions TYPICAL CONNECTION DIAGRAM Analog Inputs Single to Differential Driver Driver Amplifier Choice Voltage Reference Input Power Supply POWER DISSIPATION CONVERSION CONTROL DIGITAL INTERFACE PARALLEL INTERFACE SERIAL INTERFACE MASTER SERIAL INTERFACE Internal Clock SLAVE SERIAL INTERFACE External Clock External Discontinuous Clock Data Read after Conversion External Clock Data Read During Conversion MICROPROCESSOR INTERFACING SPI Interface (MC68HC11) ADSP-21065L in Master Serial Interface APPLICATION HINTS Layout Evaluating the AD7677 Performance OUTLINE DIMENSIONS Revision History