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TDF8704 数据表(PDF) 9 Page - NXP Semiconductors |
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TDF8704 数据表(HTML) 9 Page - NXP Semiconductors |
9 / 20 page June 1994 9 Philips Semiconductors Product specification 8-bit high-speed analog-to-digital converter TDF8704 Notes 1. In addition to a good layout of the digital and analog ground, it is recommended that the rise and fall times of the clock must be less than 1 ns. 2. Full-scale sine wave (fi = 4.43 MHz; fclk = 50 MHz). 3. Determined by beat frequency method on a reconstructed sine wave signal for no missing codes and no glitches. 4. The analog input settling time is the minimum time required for the input signal to be stabilized after a sharp full-scale input (square-wave signal) in order to sample the signal and obtain correct output data. 5. Effective bits are obtained via a Fast Fourier Transform (FFT) treatment taking 4K acquisition points per period. The calculation takes into account all harmonics and noise up to half of the clock frequency (NYQUIST frequency). Conversion to signal-to-noise ratio: S/N = EB × 6.02 + 1.76 dB. 6. Intermodulation measured relative to either tone with analog input frequencies of 4.43 MHz and 4.53 MHz. The two input signals have the same amplitude and the total amplitude of both signals provides full scale to the converter. 7. Measurement taken using video analyser VM700A. 8. Output data acquisition: the output data is available after the maximum delay time of td. Timing (note 8; see Figs 5 and 7; fclk = 50 MHz) tds sampling delay time −− 2ns th output hold time 5 −− ns td output delay time − 12 15 ns 3-state output delay times (see Figs 6 and 7) tdZH enable HIGH − 610 ns tdZL enable LOW − 12 16 ns tdHZ disable HIGH − 50 54 ns tdLZ disable LOW − 10 14 ns SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Fig.3 Influence of Tamb on VI(T) and VI(B) under 5 V supply. handbook, halfpage 60 3.49 3.43 3.45 3.47 MBD868 1.29 1.23 1.25 1.27 V I (T) (V) VI (B) (V) 20 20 60 100 T ( C) o 0.1 mV/K 0.05 mV/K VI (T) VI (B) amb Fig.4 Influence of supply voltage on VI(T) and VI(B) under Tamb = 25 °C. andbook, halfpage 4.25 4.75 5.75 3.44 3.38 3.40 3.42 MSA689 5.25 1.28 1.22 1.24 1.26 V I (T) (V) V I (B) (V) 17 mV/V 7 mV/V V (V) CC VI (T) V I (B) |
类似零件编号 - TDF8704 |
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类似说明 - TDF8704 |
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