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AD7655 Datasheet(PDF) 1 Page - Analog Devices |
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AD7655 Datasheet(HTML) 1 Page - Analog Devices |
1 / 28 page 16-Bit, 500 kSPS PulSAR® Dual, 2-Channel, Simultaneous Sampling ADC AD7654 Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 © 2005 Analog Devices, Inc. All rights reserved. FEATURES Dual, 16-bit, 2-channel simultaneous sampling ADC 16-bit resolution with no missing codes Throughput: 500 kSPS (normal mode) 444 kSPS (impulse mode) INL: ±3.5 LSB max (±0.0053% of full scale) SNR: 89 dB typ @ 100 kHz THD: −100 dB @ +100 kHz Analog input voltage range: 0 V to 5 V No pipeline delay Parallel and serial 5 V/3 V interface SPI®/QSPI™/MICROWIRE™/DSP compatible Single 5 V supply operation Power dissipation: 120 mW typical 2.6 mW @ 10 kSPS Packages: 48-lead low profile quad flat package (LQFP) 48-lead lead frame chip scale package (LFCSP) Low cost APPLICATIONS AC motor control 3-phase power control 4-channel data acquisition Uninterrupted power supplies Communications FUNCTIONAL BLOCK DIAGRAM CONTROL LOGIC AND CALIBRATION CIRCUITRY A/B 16 D[15:0] BUSY CS SER/PAR OGND OVDD DGND DVDD SERIAL PORT BYTESWAP RD AVDD AGND REFx REFGND PD RESET CNVST INAN SWITCHED CAP DAC AD7654 INA1 IMPULSE MUX EOC INA2 A0 INB1 INBN INB2 TRACK/HOLD ×2 PARALLEL INTERFACE CLOCK MUX MUX Figure 1. Table 1. PulSAR Selection Type/kSPS 100 to 250 500 to 570 800 to 1000 >1000 Pseudo Differential AD7660/ AD7661 AD7653 AD7650/ AD7652 AD7664/ AD7666 AD7667 True Bipolar AD7663 AD7665 AD7671 True Differential AD7675 AD7676 AD7677 AD7621 AD7623 18-Bit AD7678 AD7679 AD7674 AD7641 Multichannel/ Simultaneous AD7654 AD7655 GENERAL DESCRIPTION The AD7654 is a low cost, simultaneous sampling, dual- channel, 16-bit, charge redistribution SAR, analog-to-digital converter that operates from a single 5 V power supply. It contains two low noise, wide bandwidth, track-and-hold amplifiers that allow simultaneous sampling, a high speed 16-bit sampling ADC, an internal conversion clock, error correction circuits, and both serial and parallel system interface ports. Each track-and-hold has a multiplexer in front to provide a 4-channel input ADC. The A0 multiplexer control input allows the choice of simultaneously sampling input pairs INA1/INB1 (A0 = low) or INA2/INB2 (A0 = high). The part features a very high sampling rate mode (normal) and, for low power applications, a reduced power mode (impulse) where the power is scaled with the throughput. Operation is specified from −40°C to +85°C. PRODUCT HIGHLIGHTS 1. Simultaneous Sampling. The AD7654 features two sample-and-hold circuits that allow simultaneous sampling. It provides inputs for four channels. 2. Fast Throughput. The AD7654 is a 500 kSPS, charge redistribution, 16-bit SAR ADC with internal error correction circuitry. 3. Superior INL and No Missing Codes. The AD7654 has a maximum integral nonlinearity of 3.5 LSB with no missing 16-bit codes. 4. Single-Supply Operation. The AD7654 operates from a single 5 V supply. In impulse mode, its power dissipation decreases with throughput. 5. Serial or Parallel Interface. Versatile parallel or 2-wire serial interface arrangement is compatible with both 3 V and 5 V logic. |
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