Datasheet AD7675 (Analog Devices)

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16-Bit, 100 kSPS, Differential ADC AD7675 FEATURES FUNCTIONAL BLOCK DIAGRAM Throughput: 100 kSPS AVDD AGND REF REFGND DVDD DGND INL: 1.5 LSB Max ( 0.0015% of Full Scale) 16 Bits Resolution with No Missing Codes OVDD S/(N+D): 94 dB Typ @ 45 kHz AD7675 OGND THD: –110 dB Typ @ 45 kHz SERIAL Differential Input Range: PORT 2.5 V IN+ SWITCHED SER/PAR Both AC and DC Specifications IN– CAP DAC BUSY No Pipeline Delay 16 Parallel (8 Bits/16 Bits) and Serial 5 V/3 V Interface DATA[15:0] SPI™/QSPI™/MICROWIRE™/DSP Compatible CLOCK PARALLEL CS INTERFACE PD Single 5 V Supply Operation CONTROL LOGIC AND RD RESET CALIBRATION CIRCUITRY 15 mW Typical Power Dissipation, 15 W @ 100 SPS OB/2C Power-Down Mode: 7 W Max BYTESWAP Packages: 48-Lead Quad Flatpack (LQFP), CNVST 46-Lead Frame Chip Scale (LFCSP) Pin-to-Pin Compatible with the AD7660 Replacement of AD676, AD677 PulSAR Selection APPLICATIONS Type/kSPS 100–250 500–570 1000 CT Scanners
Pseudo AD7660 AD7650
Data Acquisition
Differential AD7664
Instrumentation Spectrum Analysis
True Bipolar AD7663 AD7665 AD7671
Medical Instruments
True Differential AD7675 AD7676 AD7677
Battery-Powered Systems Process Control GENERAL DESCRIPTION PRODUCT HIGHLIGHTS
The AD7675 is a 16-bit, 100 kSPS, charge redistribution SAR, 1. Excellent INL fully differential analog-to-digital converter that operates from a The AD7675 has a maximum integral nonlinearity of 1.5 LSB single 5 V power supply. The part contains a high speed 16-bit with 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 AD7675 has a minimum dynamic of 92 dB, 94 dB typical. The AD7675 is hardware factory calibrated and is comprehensively 3. Fast Throughput tested to ensure such ac parameters as signal-to-noise ratio (SNR) The AD7675 is a 100 kSPS, charge redistribution, 16-bit and total harmonic distortion (THD), in addition to the more SAR ADC with internal error correction circuitry. traditional dc parameters of gain, offset, and linearity. 4. Single-Supply Operation It is fabricated using Analog Devices’ high performance, 0.6 The AD7675 operates from a single 5 V supply and typically micron CMOS process and is available in a 48-lead LQFP or a dissipates only 17 mW. Its power dissipation decreases tiny 48-lead LFCSP with operation specified from –40°C to +85°C. with the throughput to, for instance, only 15 µW at a 100 SPS throughput. It consumes 7 µW maximum when in power-down. 5. Serial or Parallel Interface Versatile parallel (8 bits or 16 bits) or 2-wire serial interface arrangement compatible with either 3 V or 5 V logic. SPI and QSPI are trademarks of Motorola Inc. MICROWIRE is a trademark of National Semiconductor Inc. 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 DEFINITION OF SPECIFICATIONS INTEGRAL NONLINEARITY ERROR (INL) DIFFERENTIAL NONLINEARITY ERROR (DNL) +FULL-SCALE ERROR –FULL-SCALE ERROR BIPOLAR ZERO ERROR SPURIOUS FREE DYNAMIC RANGE (SFDR) EFFECTIVE NUMBER OF BITS (ENOB) TOTAL HARMONIC DISTORTION (THD) SIGNAL-TO-NOISE RATIO (SNR) SIGNAL-TO-(NOISE + DISTORTION) RATIO (S/[N+D]) APERTURE DELAY TRANSIENT RESPONSE Typical Performance Characteristics CIRCUIT INFORMATION CONVERTER 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 AD7675 Performance OUTLINE DIMENSIONS Revision History