TDA8785 Datasheet, PDF (14/24 Pages) NXP Semiconductors – 8-bit high-speed analog-to-digital converter with gain and offset controls

Philips Semiconductors
8-bit high-speed analog-to-digital converter
with gain and offset controls
Product specification
TDA8785
handbook, full pagewidth
f_OF = 100 kHz.
V _CCD
OF
output
data
output
data
t _dLZ
t _dZL
HIGH Z
HIGH
t _dHZ
50 %
t _dZH
1.15 V
90 %
HIGH Z
50 %
LOW _{10 %}
TDA8785
OF
50 %
3.3 kΩ
15 pF
V _CCD
S1
TEST
t _dLZ
t _dZL
t _dHZ
t _dZH
S1
VCCD
VCCD
GND
GND
MBG684
Fig.5 Timing diagram and test conditions of 3-state output delay time.
10²
handbook, halfpage
f_{−3 dB}
(1)
(MHz)
10
(2)
1
MBG691
48
S/N
(dB)
46
44
10^−1
42
10^−1
1
10
10²
10³
CB (pF)
(1) f_{−3 dB}.
(2) Signal-to-noise ratio.
The controlled gain amplifier is set at 20 dB gain.
Fig.6 Gain amplifier bandwidth and acquisition
chain S/N ratio as a function of the external
capacitance on pin 6.
25
handbook, halfpage
Gv
(dB)
20
15
MBG692
10
5
0
−0.75 −0.50 −0.25
0 0.25 0.50 0.75
VFSAD(p) − VFSAD(n) (V)
Fig.7 Typical amplifier gain (G_v) as a function of
the differential input voltage;
V_FSAD(p) − V_FSAD(n).
1997 Dec 18
14