TDA18211HD datasheet(14/66 Pages) NXP

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TDA18211HD_5

Product data sheet

Rev. 05 — 2 June 2009

14 of 66

NXP Semiconductors

TDA18211HD

DVB-T Silicon Tuner IC

9.3.4 Description of power level byte (read mode)

There are 9 power level bits, dispatched in byte 2 and 3. They indicate the composite

voltage gain of the LNA, the loaded attenuator voltage gain, and the level at the input of

the RF AGC.

TM_RANGE R/W

temperature range selection for the internal die sensor (see

Table 50)

192

°C to 122 °C

°C to 90 °C

TM_ON

R/W

enables die temperature measurement (see Table 50)

disables die temperature measurement (see Table 50)

3 to 0 TM_D[3:0]

XXXX data from die temperature measurement (see Table 50)

Table 11.

TM - Thermo byte (subaddress 01h) bit description …continued

Legend: * power-on reset value

Bit

Symbol

Access Value Description

Table 12.

PL - Power level (address 02h and 03h) bit description

Legend: * power-on reset value

Address Register Bit

Symbol

Access Value

Description

03h

EP1

POWER_LEVEL[8]

AGC2 gain, attenuator voltage gain included load, the

attenuator load is 50

Ω (explaining the maximum gain

−6 dB)

02h

POWER_LEVEL[7]

−15 dB

−12 dB

−9 dB

−6 dB

6 to 5 POWER_LEVEL[6:5] R

AGC1 gain, LNA voltage gain, the LNA voltage gain

assumes a 75

Ω source impedance and a low output

impedance

6 dB

9 dB

12 dB

15 dB

4 to 0 POWER_LEVEL[4:0] R

sensed level at the input of the RF AGC, detector

slope is

−1 dB/step

0 0000

103 dB

µV (RMS value)

0 0001

102 dB

µV (RMS value)

...

1 1110

73 dB

µV (RMS value)

1 1111

72 dB

µV (RMS value)

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