TDA18271HD/C2.557 NXP Semiconductors, TDA18271HD/C2.557 Datasheet - Page 36

• Manufacturer Part Number: TDA18271HD/C2.557
• Manufacturer: NXP Semiconductors

Specifications of TDA18271HD/C2.557

• Lead Free Status / Rohs Status: Compliant

NXP Semiconductors
TDA18271HD_4
Product data sheet
Fig 16. Flowchart TDA18271RFtrackingFiltersCorrection
RF_CAL_DC_OVER_DT_map
freq_input
dCoverdT
TMVALUE_CURRENT
TMVALUE_RFCAL
Capprox
RFCAL_TCOMP
RF_CAL_map
RF_BAND_map
freq_input
MS
RF_A2
RF2
RF_B2
Cprog_table
freq_input
Capprox =
RF_A2
RF_B2 + Cprog_table
Action
Power-up TDA18271
Read current die temperature
Call TDA18271ThermometerRead
Frequency dependent parameters update
Find RFC_CPROG = f
Find RF1, RF2, RF3, RF_A1, RF_A2, RF_B1, RF_B2 = f
in RF_BAND_map (MS)
Find dCoverdT = f
Calculate temperature compensation
RFCAL_TCOMP = dCoverdT
Calculate final Cprog
Cprog = Capprox + RFCAL_TCOMP
(freq_input
Capprox = 0
Capprox < 0
RF2) +
Start TDA18271RFTrackingFiltersCorrection
No
End TDA18271RFTrackingFiltersCorrection
RF(max)
Yes
RF(max)
Rev. 04 — 19 May 2009
in RF_CAL_DC_OVER_DT_map
Capprox
freq_input < RF2
in RF_CAL_map, Cprog_table = RFC_Cprog
No
(TMVALUE_CURRENT
RF3 = 0 or
Capprox > 255
Capprox = 255
RF_A1
RF1
RF_B1
Cprog_table
freq_input
Yes
Yes
RF(max)
TMVALUE_RFCAL) / 1000
No
Capprox =
RF_A1
RF_B1 + Cprog_table
(freq_input
Internal table
RFC_Cprog = Cprog
SM = 0, SM_LT = 0,
SM_XT = 0
TDA18271HD
TMVALUE_CURRENT
Cprog_table
RF1
RF2
RF3
RF_A1
RF_A2
RF_B1
RF_B2
dCoverdT
RFCAL_TCOMP
RF1) +
© NXP B.V. 2009. All rights reserved.
Silicon Tuner IC
I
EP3
2
C-bus
Capprox
EB14
001aah052
MS
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