MAX3580(2006) Просмотр технического описания (PDF) - Maxim Integrated
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MAX3580 Datasheet PDF : 21 Pages
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Direct-Conversion TV Tuner
Pin Description
PIN
NAME
FUNCTION
1
SDA
Serial-Data Input Line. Requires a pullup resistor to VCC.
2
SCL
Serial-Clock Input. Requires a pullup resistor to VCC.
3
RFIN2 Second RF Input
4
RFIN
First RF Input
5
ADDR2 Address Line. Sets the 3rd LSB of the device address. Connect to ground to set for “0” or VCC to set
for “1.”
6
GND_LNA Not Internally Connected. Connect to ground.
7
VCC_RF DC Supply for RF LNA. Connect as close as possible a 100pF capacitor from this pin to GND.
8
LEXT
External Bias Inductor. Connect to VCC with a 270nH inductor.
9
RF_AGC Gain Control Input for RF VGA.
10
IND1
VHF Inductor Pin 1. Keep traces to inductor as short as possible.
11
IND2
VHF Inductor Pin 2. Keep traces to inductor as short as possible.
12
N.C.
No Connection
13
OVLD_DET Overload Detector Output. Connect a 10kΩ pullup resistor to VCC and a RC network to RF_AGC.
14
VCC_BB DC Supply for Baseband Filter. Connect as close as possible a 10nF capacitor from this pin to ground.
15
BBQ- Quadrature Inverted Baseband Output
16
BBQ+ Quadrature Noninverted Baseband Output
17
BBI-
In-Phase, Inverted Baseband Output
18
BBI+
In-Phase, Noninverted Baseband Output
19
BB_AGC Gain Control Input for Baseband VGAs
20
VCC_VCO DC Supply for the VCO. Connect as close as possible a 100pF capacitor from this pin to ground.
21
VTUNE VCO Tuning Voltage Input. Connect the PLL loop filter output directly to this pin.
22
GND_TUNE Ground Reference for the Tuning Voltage. Connect to ground of the loop filter.
23
LDO
VCO LDO Output. Connect a 0.1µF capacitor to ground.
24
CP
Charge-Pump Output. Connect the charge-pump output to the PLL loop filter input.
25
GND_CP Ground for the Charge Pump
26
VCC_SYN DC Supply for Synthesizer and Serial-Interface Control. Connect as close as possible a 10nF
capacitor from this pin to ground.
27
GND_PLL Ground for the PLL
28
MUX
Multiplex Output Line. Can be used as a PLL lock-detector output.
29
REF_BUFF Buffered Output of Reference Oscillator
30
VCC_XTAL DC Supply for Reference Oscillator. Connect as close as possible a 10nF capacitor from this pin to ground.
31
XB
Reference Input. Connect to a parallel resonant mode XTAL through a load-matching capacitor, or
can also be used as a reference clock input pin.
32
XE
Reference Oscillator Feedback. Connect to a capacitive divider when used in self-oscillating mode.
EP
EP
Exposed Paddle. Solder to the board’s ground plane to achieve the lowest possible impedance path.
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