Datasheet AD7671 (Analog Devices)

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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) INL: AD7671 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 INTERFACE D[15:0] 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 Parallel (8/16 Bits) and Serial 5 V/3 V Interface OB/2C SPI®/QSPI™/MICROWIRE™/DSP Compatible BYTESWAP Single 5 V Supply Operation WARP IMPULSE CNVST Power Dissipation 112 mW Typical 15 W @ 100 SPS PulSAR Selection Power-Down Mode: 7 W Max Type/kSPS 100–250 500–570 800–1000 Package: 48-Lead Quad Flatpack (LQFP) Package: 48-Lead Chip Scale (LFCSP)
Pseudo AD7660 AD7650
Pin-to-Pin Compatible Upgrade of the AD7665/AD7664
Differential AD7664
APPLICATIONS
True Bipolar AD7663 AD7665 AD7671
Data Acquisition
True Differential AD7675 AD7676 AD7677
Communication Instrumentation
18-Bit AD7678 AD7679 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 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 –40∞C to +85∞C. supply. It contains a high speed 16-bit sampling ADC, a resistor input scaler that allows various input ranges, an internal
PRODUCT HIGHLIGHTS
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 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 AD7671 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 may result from its use. No license is granted by implication or otherwise
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Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PulSAR Selection PRODUCT HIGHLIGHTS SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDERING GUIDE PIN FUNCTION DESCRIPTION DEFINITION OF SPECIFICATIONS Integral Nonlinearity Error (INL) Differential Nonlinearity Error (DNL) Full-Scale Error Bipolar Zero Error Unipolar 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 Modes of Operation Transfer Functions TYPICAL CONNECTION DIAGRAM Analog Inputs Driver Amplifier Choice Voltage Reference Input Scaler Reference Input (Bipolar Input Ranges) Power Supply POWER DISSIPATION CONVERSION CONTROL DIGITAL INTERFACE PARALLEL INTERFACE SERIAL INTERFACE SLAVE SERIAL INTERFACE External Clock MASTER SERIAL INTERFACE Internal 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 AD7671 Performance OUTLINE DIMENSIONS Revision History