參數(shù)資料
型號(hào)： TDA8761M
廠商： NXP SEMICONDUCTORS
元件分類： ADC
英文描述： 9-bit analog-to-digital converter for digital video
中文描述： 1-CH 9-BIT RESISTANCE LADDER ADC, PARALLEL ACCESS, PDSO28
封裝： 5.30 MM, PLASTIC, MO-150AH, SOT-341-1, SSOP-28
文件頁(yè)數(shù)： 15/20頁(yè)
文件大小： 93K
代理商： TDA8761M
1995 Mar 20
15
Philips Semiconductors
Preliminary specification
9-bit analog-to-digital converter for
digital video
TDA8761
APPLICATION INFORMATION
Fig.12 Application diagram.
The analog and digital supplies should be separated and decoupled.
The external voltage generator must be built such that a good supply voltage ripple rejection is achieved with respect to the LSB value. Eventually, the
reference ladder voltages can be derived from a well regulated V
CCA
supply through a resistor bridge and a decoupled capacitor.
For applications where the input signal must remain well centred around middle scale, V
must be decoupled and connected to analog input signal
(pin 8) through a resistor. The values must be defined in accordance with the input signal frequency in order to avoid direct coupling into the ADC ladder
(e.g. R = 5 k
and C = 100 nF).
(1) V
RB
, V
RM
and V
RT
are decoupled to AGND.
(2) Pins 15 and 16 should be connected to DGND in order to prevent noise influence.
handbook, halfpage
28
27
26
25
24
23
22
21
20
19
18
17
TDA8761
OGND2
VCCO1
D2
D3
D4
D5
D6
D7
D8
D1
D0
VCCD
VCCA
1
2
3
4
5
6
7
8
9
10
11
12
CLK
AGND1
AGND2
n.c.
VRB
VRM
VRT
MGC362
16
15
13
14
100 nF
100 nF
DGND
OGND1
IR
CE
TC
VCCO2
AGND
AGND
100 nF
AGND
VI
(1)
(1)
(1)
(2)
n.c.
(2)
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