tda8705at NXP Semiconductors, tda8705at Datasheet - Page 11

• Manufacturer Part Number: tda8705at
• Description: 6-bit High-speed Dual Analog-to-digital Converter Adc
• Manufacturer: NXP Semiconductors

Philips Semiconductors
APPLICATION INFORMATION
1996 Jan 12
handbook, full pagewidth
6-bit high-speed dual Analog-to-Digital
Converter (ADC)
The analog and digital supplies should be separated and decoupled.
V
(1) In the event of AC-coupling, C
(2) When pin 10 (DEC) is short-circuited to AGND, an external regulator can be connected to V
RT(n)
In the event of DC-coupling, C
must be in the range of V
f
CL
, V
RM(n)
=
------------------------------------- -
2
and V
1
R
RB(n)
I
C
and DEC inputs are decoupled to AGND.
L
where input resistance R
RT(n)
LA
LA
V
and C
and C
input A
input B
RB(n)
.
LB
LB
5 V
capacitors are omitted. The DC biassing and AC modulation signal directly applied to inputs (pin 6 and 11),
values are chosen in accordance with the classical low frequencies cut-off formulae
100 nF
I
is the value measured under DC conditions.
100 nF
100 nF
C
100 nF
100 nF
1 nF
C
100 nF
100 nF
100 nF
5 V
LA
LB
Fig.6 Application diagram.
(1)
(1)
(2)
V CCD
V RMA
V RMB
DGND
AGND
V RBA
V CCA
V RBB
V RTA
V RTB
DEC
CLK
V IA
V IB
10
1
2
3
4
5
6
7
8
9
11
12
13
14
TDA8705A
11
MLC377
28
27
26
25
24
23
22
21
20
19
18
17
16
15
D5A
D4A
D3A
D2A
D1A
D0A
OGND
V CCO
D5B
D4B
D3B
D2B
D1B
D0B
RT(n)
and V
RB(n)
100 nF
.
5 V
Product specification
TDA8705A