TDA8046 Datasheet, PDF (16/48 Pages) NXP Semiconductors – Multi-mode QAM demodulator

Philips Semiconductors
Multi-mode QAM demodulator
Product specification
TDA8046
handbook, full pagewidth
CLKI = 1
ICLK
DAC output
current
1_{/2 ICLK}
CLKI = 0
−¹/₂ ICLK
digital input
−ICLK
fVCXO
VCLKREC
MGG181
I_pos = positive output current; I_CLK.
I_neg = negative output current; −I_CLK.
I_oCLK = -⁽---I--^p--^o---^s---2-^–----I--ⁿ--^e---^g---⁾-
∆I_oCLK = -⁽-₍--I-I-^p-_p--^oo---^ss---^+–-----II--_nn--_e-^e--_g-^g-₎-⁾-- × 100
Fig.12 The definition of the DAC currents and the expected frequency behaviour of the VCXO for clock recovery.
1996 Nov 19
16