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Philips Semiconductors
12-bit high-speed Analog-to-Digital
Converter (ADC)
SYMBOL
S
-
-
IGNAL
TO
NOISE RATIO
S/N
signal-to-noise ratio
Timing (C
= 15 pF); note 4; see Fig.3
L
t
sampling delay time
ds
t
output hold time
h
t
output delay time
d
3-state output delay times; see Fig.4
t
enable HIGH
dZH
t
enable LOW
dZL
t
disable HIGH
dHZ
t
disable LOW
dLZ
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
---------------------------------------------------------------------------------------------------------------
(2nd)
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 t
1999 Feb 16
PARAMETER
F
2
2
2
+
(3rd)
+
(4th)
+
CONDITIONS
without harmonics;
f
= 30 MHz; f
= 4.43 MHz
clk
i
V
= 4.75 V
CCO
V
= 3.15 V
CCO
2
2
(5th)
+
(6th)
9
Preliminary specification
MIN.
TYP.
61
8
12
15
14
16
16
14
.
d
TDA8767
MAX.
UNIT
dB
2
ns
ns
15
ns
18
ns
18
ns
20
ns
20
ns
18
ns
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