tda8296 NXP Semiconductors, tda8296 Datasheet - Page 45

• Manufacturer Part Number: tda8296
• Description: Tda8296 Digital Global Standard Low If Demodulator For Analog Tv And Fm Radio
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA8296
Product data sheet
9.3.16 Video and sound DAC control
Table 49.
Legend: * = default value.
The TDA8296 implements two 10-bit DAC modules (CVBS and sound outputs) which are
sampled by a 108 MHz clock. A reference module derives biasing currents for the two
DACs.
Table 50.
Legend: * = default value.
Bit
0
Bit
7
6 to 1 B_DA_V[5:0] R/W
0
Fig 16. Internal low IF frequency response in front of the VIF demodulator
amplitude
response
(1) ADC sample rate 27 MHz
(2) ADC sample rate 54 MHz
(dB)
Symbol
-
PD_DA_V
Symbol
AD_SR54M
-10
-15
-20
ADC sample rate of 54 MHz recommended for optimum aliasing suppression. Internal low IF tilt in
54 MHz mode can be compensated by CVBS_EQ[7:0] set to −2 dB
-5
5
0
ADC_CTL_2 register (address 34h) bit description
VIDEODAC_CTL register (address 35h) bit description
0
Digital global standard low IF demodulator for analog TV and FM radio
All information provided in this document is subject to legal disclaimers.
Access Value
R/W
R/W
2
Access Value
R/W
Rev. 1 — 3 March 2011
0*
00 0000
11 1111*
0*
1
4
0
1*
Description
reserved, must be set to logic 0
B_DA_V modifies between 50% to 100% the full scale
DAC output current. See
When HIGH, PD_DA_V sets the video DAC into its
Power-down mode.
6
Description
AD_SR54M sets the ADC sampling rate
minimum current setting
maximum current setting
Normal mode
video DAC Power-down mode
ADC sampling rate 27 MHz; first decimation filter is
bypassed
ADC sampling rate 54 MHz
8
10
…continued
Section
(1)
(2)
12
frequency (MHz)
13.3.
TDA8296
001aan682
© NXP B.V. 2011. All rights reserved.
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