AD7476ART Analog Devices, AD7476ART Datasheet
AD7476ART
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AD7476ART Summary of contents
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GENERAL DESCRIPTION The AD7476/AD7477/AD7478 are, respectively, 12-bit, 10-bit, and 8-bit, high-speed, low-power, successive-approximation ADCs. The parts operate from a single 2. 5.25 V power supply and feature throughput rates MSPS. The parts contain a ...
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AD7476/AD7477/AD7478 AD7476–SPECIFICATIONS S and B Versions 2. 5. SCLK Parameter DYNAMIC PERFORMANCE 3 Signal-to-Noise + Distortion (SINAD) 3 Signal-to-Noise Ratio (SNR) 3 Total Harmonic Distortion (THD) 3 Peak Harmonic or Spurious Noise (SFDR) ...
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AD7477–SPECIFICATIONS Parameter DYNAMIC PERFORMANCE Signal-to-Noise + Distortion (SINAD) Total Harmonic Distortion (THD) Peak Harmonic or Spurious Noise (SFDR) Intermodulation Distortion (IMD) Second Order Terms Third Order Terms Aperture Delay Aperture Jitter Full Power Bandwidth DC ACCURACY Resolution Integral Nonlinearity Differential ...
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AD7476/AD7477/AD7478 AD7478–SPECIFICATIONS Parameter DYNAMIC PERFORMANCE Signal-to-Noise + Distortion (SINAD) Total Harmonic Distortion (THD) Peak Harmonic or Spurious Noise (SFDR) Intermodulation Distortion (IMD) Second Order Terms Third Order Terms Aperture Delay Aperture Jitter Full Power Bandwidth DC ACCURACY Resolution Integral Nonlinearity ...
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TIMING SPECIFICATIONS Limit MIN AD7476/AD7477/AD7478 3 Parameter SCLK × × CONVERT SCLK QUIET t ...
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... AD7478 consists of four leading zeros followed by the 8 bits of conversion data, followed by four trailing zeros, which is provided MSB first Chip Select. Active low logic input. This input provides the dual function of initiating conversions on the AD7476/AD7477/AD7478 and framing the serial data transfer. Model AD7476ART AD7476BRT AD7476SRT AD7477ART AD7477SRT AD7478ART 3 ...
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TERMINOLOGY Integral Nonlinearity This is the maximum deviation from a straight line passing through the endpoints of the ADC transfer function. For the AD7476/ AD7477, the endpoints of the transfer function are zero scale, a point 1/2 LSB below the ...
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AD7476/AD7477/AD7478 PERFORMANCE CURVES Figure 2 shows a typical FFT plot for the AD7476 at 1 MHz sample rate and 100 kHz input frequency. 0 –15 –35 –55 –75 –95 –115 0 50 100 150 200 250 300 FREQUENCY – kHz ...
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CIRCUIT INFORMATION The AD7476/AD7477/AD7478 are, respectively, fast, micro- power, 12-bit, 10-bit, and 8-bit, single supply, A/D converters. The parts can be operated from a 2. 5.25 V supply. When operated from either supply or a ...
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AD7476/AD7477/AD7478 Alternatively, because the supply current required by the AD7476/ AD7477/AD7478 is so low, a precision reference can be used as the supply source to the AD7476/AD7477/AD7478. A REF19x voltage reference (REF195 for REF193 for 3 V) ...
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V = 5.25V –70 DD –75 –80 –85 –90 10k 100k INPUT FREQUENCY – Hz –72 –74 –76 –78 –80 –82 –84 10k 100k INPUT FREQUENCY – Hz Digital Inputs The digital inputs applied to the ...
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AD7476/AD7477/AD7478 THE PART BEGINS TO POWER SCLK SDATA INVALID DATA required to complete the conversion and access the complete conversion result. CS may idle high until the next conversion or may idle low until CS returns ...
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POWER VERSUS THROUGHPUT RATE By using the power-down mode on the AD7476/AD7477/AD7478 when not converting, the average power consumption of the ADC decreases at lower throughput rates. Figure 20 shows how as the throughput rate is reduced, the device remains ...
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AD7476/AD7477/AD7478 SCLK THREE- STATE Z ZERO ZERO SDATA 4 LEADING ZEROS SCLK THREE- STATE Z ZERO ZERO SDATA 4 LEADING ZEROS SCLK 1 ...
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MICROPROCESSOR INTERFACING The serial interface on the AD7476/AD7477/AD7478 allows the part to be directly connected to a range of many different microprocessors. This section explains how to interface the AD7476/AD7477/AD7478 with some of the more common microcontroller and DSP serial ...
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AD7476/AD7477/AD7478 AD7476/AD7477/AD7478 to DSP56xxx Interface The connection diagram in Figure 26 shows how the AD7476/ AD7477/AD7478 can be connected to the SSI (Synchronous Serial Interface) of the DSP56xxx family of DSPs from Motorola. The SSI is operated in Synchronous Mode ...