1997 Oct 29

9

Philips Semiconductors

Product specification

8-bit high-speed analog-to-digital converter

TDA8714

Notes to the characteristics

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 not be less than 1 ns.

2. Analog input voltages producing code 00 up to and including FF:

4. The analog bandwidth is defined as the maximum input sine wave frequency which can be applied to the device.

No glitches greater than 2 LSBs, neither any significant attenuation are observed in the reconstructed signal.

5. 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.

6. Effective bits are obtained via a Fast Fourier Transform (FFT) treatment taking 8K acquisition points per equivalent

fundamental 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.

7. 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.

8. Measurement carried out using video analyser VM700A where the video analog signal is reconstructed through a

digital-to-analog converter.

the acquisition circuit.