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AD9432BSQ-105 Datasheet(PDF) 5 Page - Analog Devices |
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AD9432BSQ-105 Datasheet(HTML) 5 Page - Analog Devices |
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5 / 20 page  REV. E AD9432 –5– PIN CONFIGURATION 52 51 50 49 48 43 42 41 40 47 46 45 44 14 15 16 17 18 19 20 21 22 23 24 25 26 1 2 3 4 5 6 7 8 9 10 11 13 12 PIN 1 IDENTIFIER TOP VIEW (Not to Scale) 39 38 37 36 35 34 33 32 31 30 29 28 27 GND GND AD9432 GND VCC VCC GND GND GND VDD DGND D0 (LSB) D1 D2 D3 VCC GND GND VCC VCC ENCODE ENCODE GND VCC GND DGND VDD DEFINITION OF SPECIFICATIONS Analog Bandwidth (Small Signal) The analog input frequency at which the spectral power of the fundamental frequency (as determined by the FFT analysis) is reduced by 3 dB. Aperture Delay The delay between a differential crossing of ENCODE and ENCODE and the instant at which the analog input is sampled. Aperture Uncertainty (Jitter) The sample-to-sample variation in aperture delay. Differential Nonlinearity The deviation of any code from an ideal 1 LSB step. Encode Pulsewidth/Duty Cycle Pulsewidth high is the minimum amount of time that the ENCODE pulse should be left in Logic “1” state to achieve rated performance; pulsewidth low is the minimum time ENCODE pulse should be left in low state. At a given clock rate, these specs define an acceptable Encode duty cycle. Integral Nonlinearity The deviation of the transfer function from a reference line measured in fractions of 1 LSB using a “best straight line” determined by a least square curve fit. Minimum Conversion Rate The encode rate at which the SNR of the lowest analog signal frequency drops by no more than 3 dB below the guaranteed limit. Maximum Conversion Rate The encode rate at which parametric testing is performed. Output Propagation Delay The delay between a differential crossing of ENCODE and ENCODE and the time when all output data bits are within valid logic levels. Power Supply Rejection Ratio The ratio of a change in input offset voltage to a change in power supply voltage. Signal-to-Noise Plus Distortion (SINAD) The ratio of the rms signal amplitude (set at 1 dB below full scale) to the rms value of the sum of all other spectral compo- nents, including harmonics but excluding dc. Signal-to-Noise Ratio (SNR) The ratio of the rms signal amplitude (set at 1 dB below full scale) to the rms value of the sum of all other spectral compo- nents, excluding the first five harmonics and dc. PIN FUNCTION DESCRIPTIONS Pin Number (AD9432BST) Mnemonic Function 1, 3, 4, 9, 11, 33, 34, 35, 38, 39, 40, 43, 48, 51 GND Analog Ground 2, 5, 6, 10, 36, 37, 42, 44, 47, 52 VCC Analog Supply (5 V) 7 ENCODE Encode Clock for ADC–Complementary 8 ENCODE Encode Clock for ADC–True (ADC samples on rising edge of ENCODE) 14 OR Out of Range Output 15–20, 25–30 D11–D6, D5–D0 Digital Output 12, 21, 24, 31 DGND Digital Output Ground 13, 22, 23, 32 VDD Digital Output Power Supply (2.7 V to 3.6 V) 41 DNC Do Not Connect 45 VREFIN Reference Input for ADC (2.5 V Typical); Bypass with 0.1 µF to Ground. 46 VREFOUT Internal Reference Output (2.5 V Typical) 49 AIN Analog Input–True 50 AIN Analog Input–Complementary |
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