TDA8296 datasheet(68/87 Pages) NXP

68 / 87 page

TDA8296

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 1 — 3 March 2011

68 of 87

NXP Semiconductors

TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

13.3 DAC connection

The video and sound output signals are converted from IC internal digital domain to

analog output signal domain by digital controlled current sources. therefore the Digital to

Analog Conversion (DAC) is based on controlled current sources. the current sources of

the video and sound DACs are operating in differential mode. Even though differential

mode can be used, the typical application use case is single ended. Each output of the

differential pair needs to be terminated by the same impedance to ground. The

termination impedance converts the DAC output current to signal voltage. The full scale

DAC current is defined by application resistor RRSET (connected between pin RSET and

ground). Typical values of RRSET are 1 kΩ and 2 kΩ. Additionally the full scale DAC

current can be adjusted between 50% and 100% via register 0x35h (bits B_DA_V[5:0])

and via register 0x36h (bits B_DA_S[5:0]).

The full scale current is application dependent and needs to be matched to the termination

(output voltage is product of DAC current and termination impedance value). The nominal

peak-peak signal voltage should not exceed 1Vpp. The sum of AC an DC signal should not

exceed 1.5V single ended.

(1) Bottom layer

(2) Top layer

Fig 27. PCB pattern using circuit diagrams of Figure 20, Figure 22, Figure 23 and 16 MHz

reference from master

001aan108

SDA-T

SCL-T

SDA

SCL

TDA8296HN

SIFp

CVBSp

IF-AGC

Low-IFp

Low-IFn

16 MHz-p

16 MHz-n

2.2

220

10 pF

100 pF

39 pF

100

2.2

1.0

470 nF

2.2 k

(1)

(2)

TDA8296 Datasheet(PDF) 68 Page - NXP Semiconductors

TDA8296 Datasheet(HTML) 68 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87

Datasheet Download

Link URL