AD7862AR-3 Analog Devices Inc, AD7862AR-3 Datasheet
AD7862AR-3
Specifications of AD7862AR-3
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AD7862AR-3 Summary of contents
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FEATURES Two Fast 12-Bit ADCs Four Input Channels Simultaneous Sampling & Conversion 4 s Throughput Time Single Supply Operation Selection of Input Ranges for AD7862-10 2.5 V for AD7862 2.5 V for AD7862-2 High ...
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AD7862–SPECIFICATIONS Parameter SAMPLE AND HOLD –3 dB Small Signal Bandwidth Aperture Delay Aperture Jitter Aperture Delay Matching 2 DYNAMIC PERFORMANCE 3 Signal to (Noise+Distortion) Ratio @ + MIN MAX 3 Total Harmonic Distortion 3 Peak Harmonic ...
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... Storage Temperature Range . . . . . . . . . . . . – +150 C Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . +150 C Plastic DIP Package, Power Dissipation . . . . . . . . . . 670 mW Thermal Impedance . . . . . . . . . . . . . . . . . . . . 116 C/W JA Input Model Input AD7862AR- AD7862BR- AD7862ARS- AD7862AN- AD7862SQ- AD7862AR-3 2.5 V AD7862BR-3 2.5 V AD7862ARS-3 2.5 V AD7862AN-3 2.5 V AD7862AR 2.5 V AD7862ARS 2.5 V REV Version Version Version 4 ...
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AD7862 TIMING CHARACTERISTICS A, B Parameter Versions t 3.6 CONV t 0.3 ACQ Parallel Interface ...
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Pin Mnemonic Description Connect 2 DB11 Data Bit 11 (MSB). Three-state TTL output. Output coding is twos complement for the AD7862- 10 and AD7862-3. Output coding is straight (natural) binary for the AD7862-2. 3–6 DB10–DB7 Data Bit ...
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AD7862 TERMINOLOGY Signal to (Noise + Distortion) Ratio This is the measured ratio of signal to (noise + distortion) at the output of the A/D converter. The signal is the rms amplitude of the fundamental. Noise is the rms sum ...
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CONVERTER DETAILS The AD7862 is a high speed, low power, dual 12-bit A/D converter that operates from a single +5 V supply. The part contains two 4 s successive approximation ADCs, two track/ hold amplifiers, an internal +2.5 V reference ...
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AD7862 currents, as the resistor stage is followed by a high input impedance stage of the track/hold amplifier. For the AD7862-10 7 and For the AD7862-3, ...
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CONVST t 3 BUSY t CONV DATA Figure 5a. Mode 1 Timing Operation Diagram for High Sampling Performance and fourth read pulses, after the second conversion and A0 high, access the result from Channel B (V and ...
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AD7862 respectively). The third and fourth read pulses, after the second conversion and A0 high, access the result from Channel B (V and V respectively). Data is read from the part via a 12-bit B2 parallel data bus with standard ...
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Figure 7 shows a histogram plot for 8192 conversions input using the AD7862 with 5 V supply. The analog input was set at the center of a code transition. It can be seen that all the codes ...
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AD7862 Intermodulation Distortion With inputs consisting of sine waves at two frequencies, fa and fb, any active device with nonlinearities will create distortion products at sum and difference frequencies of mfa ...
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MICROPROCESSOR INTERFACING The AD7862 high speed bus timing allows direct interfacing to DSP processors as well as modern 16-bit microprocessors. Suitable microprocessor interfaces are shown in Figures 14 through 18. AD7862–ADSP-2100 Interface Figure 14 shows an interface between the AD7862 ...
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AD7862 Some applications may require that the conversion be initiated by the microprocessor rather than an external timer. One option is to decode the AD7862 CONVST from the address bus so that a write operation starts a conversion. Data is ...
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DSP MICROPROCESSOR DAC TORQUE & FLUX CONTROL LOOP CALCULATIONS & DAC TWO TO THREE PHASE INFORMATION DAC TORQUE SETPOINT FLUX SETPOINT V TRANSFORMATION TO TORQUE & FLUX CURRENT V A2 COMPONENTS AD7862 *ADDITIONAL PINS OMITTED FOR ...
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AD7862 28-Pin Plastic DIP (N-28) 1.565 (39.70) 1.380 (35.10 0.580 (14.73) 0.485 (12.32 PIN 1 0.060 (1.52) 0.250 0.015 (0.38) (6.35) MAX 0.150 (3.81) MIN 0.200 (5.05) 0.022 (0.558) 0.100 0.070 SEATING 0.125 (3.18) (1.77) (2.54) ...