TDA8767H Ver la hoja de datos (PDF) - Philips Electronics
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TDA8767H Datasheet PDF : 20 Pages
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Philips Semiconductors
12-bit high-speed Analog-to-Digital
Converter (ADC)
Preliminary specification
TDA8767
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP. MAX. UNIT
SIGNAL-TO-NOISE RATIO
S/N
signal-to-noise ratio
without harmonics;
−
fclk = 30 MHz; fi = 4.43 MHz
61
−
dB
Timing (CL = 15 pF); note 4; see Fig.3
tds
sampling delay time
th
output hold time
td
output delay time
VCCO = 4.75 V
VCCO = 3.15 V
−
−
2
ns
8
−
−
ns
−
12
15
ns
15
18
ns
3-state output delay times; see Fig.4
tdZH
enable HIGH
tdZL
enable LOW
tdHZ
disable HIGH
tdLZ
disable LOW
−
14
18
ns
−
16
20
ns
−
16
20
ns
−
14
18
ns
Notes to the characteristics
1. The −3 dB (or −1 dB) analog bandwidth is determined by the 3 dB (or 1 dB) reduction in the reconstructed output,
the input being a full-scale sine wave.
2. THD (total harmonic distortion) is obtained with the addition of the first five harmonics:
THD = 20 log-------------------------------------------------------F--------------------------------------------------------
(2nd)2 + (3rd)2 + (4th)2 + (5th)2 + (6th)2
F being the fundamental harmonic referenced at 0 dB for a full-scale sine wave input.
3. 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 (see Fig.5).
4. Output data acquisition: the output data is available after the maximum delay of td.
1999 Feb 16
9
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