TDA8767 Datasheet, PDF (13/20 Pages) NXP Semiconductors – 12-bit high-speed Analog-to-Digital Converter ADC

Philips Semiconductors
12-bit high-speed Analog-to-Digital
Converter (ADC)
APPLICATION INFORMATION
Preliminary specification
TDA8767
handbook, full pagewidth
220 nF
IN
100 Ω
4.7 µF
1:1
10
nF
VI
100 Ω
VI
VCCA
n.c.
R1
5V
(2)
100 nF
R2
n.c.
n.c.
n.c.
100 nF
n.c.
5V
(3)
100 nF
Vref
5 V SH 5 V
100 nF
mode
100 nF
CLK⁽¹⁾
n.c.
44 43 42 41 40 39 38 37 36 35 34
1
33
2
32
3
31
4
30
5
29
6
TDA8767H
28
7
27
8
26
9
25
10
24
11
23
12 13 14 15 16 17 18 19 20 21 22
5V
100 nF
D0 (LSB)
D1
D2
D3
D4
D5
D6
D7
D8
D9
MBH145
n.c. _n.c. n.c. n.c.
5V
100 nF
IR D10
D11
(MSB)
chip select input (OE)
output format select (TC)
The analog, digital and output supplies should be separated and decoupled.
(1) At power-up a high level clock must be provided within less than 1 µs or a pull-up resistor must be connected between CLK and V_CCD.
(2) R1, and R2 must be determined in order to obtain a middle voltage of 2.5 V; see Table 1. To ensure a sufficient analog input stability, the minimum
current into these resistors must be about 1 mA.
(3) V_ref must be decoupled to V_CCA.
Fig.6 Application diagram (differential input mode).
1999 Feb 16
13