MAX3580ETJ+ Maxim Integrated Products, MAX3580ETJ+ Datasheet - Page 14

• Manufacturer Part Number: MAX3580ETJ+
• Description: IC TUNER TV DIRECT CONV 32TQFN
• Manufacturer: Maxim Integrated Products
• Type: Direct Conversion TV Tunerr

Specifications of MAX3580ETJ+

• Applications: Set-Top Boxes
• Mounting Type: Surface Mount
• Package / Case: 32-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Direct-Conversion TV Tuner
SHDN_BG: Main Bandgap
The main bandgap can and will be shut down
once all other blocks are shut down (i.e., all bits in this
shutdown register and bits VCO_ in the VCO
Control Register and bits DC_MO_ in the DC
Offset Control Register are shut down).
SHDN_PD: Baseband Power Detector
SHDN_RF: RF LNA/VGA:
SHDN_MIX: I/Q Mixer and LO Drivers
SHDN_BB: Baseband Filters and VGA
SHDN_SYN: Fractional PLL
SHDN_REF: Controls the Crystal Oscillator Buffered
Output
The XTAL oscillator activation results from the
SHDN_SYN, SHDN_REF bits: If either one is on,
the XTAL oscillator runs. The XTAL oscillator is
shut down only if both bits are off.
VCO<1:0>: Selects 1 of 3 VCO Bands. 00 turns off
VCO block completely.
BS<2:0>: Selects 1 of 8 VCO Sub-Bands
* Not production tested.
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0 = Enabled
1 = Disabled
For factory use only.
Set to 1 at all times.
0 = Enabled
1 = Disabled
0 = Enabled
1 = Disabled
0 = Enabled
1 = Disabled
0 = Enabled
1 = Disabled
0 = Enabled
1 = Disabled
Shutdown Control (Register Address 0x08)
VCO Control (Register Address 0x09)
VAS: VCO Band Autoselect
ADL: VCO ADC Latch Enable Bit
ADE: Enable VCO Tune Voltage DAC Read
PD_TH<2:0>: Detection Threshold for Baseband
Power Detector
BB_BW<3:0>: Baseband Filter Bandwidth. Optimum
values for 7MHz and 8MHz wide RF channels can
be taken from the ROM table.
DC_TH<1:0>: DC Offset Correction Thresholds.
Keeps output within:
DC_SP<1:0>: DC Offset Correction Speed (or Highpass
Corner Frequency).
DC_MO<1:0>: Mode of Operation
DC_DAC<8>: MSB for DC Offset DAC
BB_BIA: Baseband Filter Op-Amp Bias Settings
0 = VCO band select controlled by bits VCO<1:0>
1 = Controlled by autotuner
1 = Latches ADC value
0 = Default
1 = Enables ADC read
0 = Default
00 = Output within ±0.55V of balanced state
11 = Output within ±0.75V of balanced state
11 = Fast (~500Hz)
01 = Slow (~20Hz)
00 = Off/hold DAC values
00 = Off
10/01 = Sets I/Q channel DACs direct from register
11 = Normal operation
0 = Low
1 = High
Baseband Control (Register Address 0x0A)
DC Offset Control (Register Address 0x0B)