HI-IF Single-Chip Broadband Tuners

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9

PIN

NAME

FUNCTION

27

2nd Charge-Pump Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not share

the bypass capacitor ground vias with any other branches.

29

LOCFLT2

2nd LO Noise-Filtering Capacitor Connector. Connect a capacitor to GND. (Refer to the EV kit.)

30

TUNE2

2nd VCO Tuning Input. Connect this analog voltage input to a third-order loop-filter output.

31

2nd VCO Circuitry Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not share

the bypass capacitor ground vias with any other branches.

33

2nd LO Generation Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not share

the bypass capacitor ground vias with any other branches.

35, 36

IFOUT1+,

IFOUT1-

1st Differential IF Outputs. These outputs are AC-coupled to the SAW filter inputs.

37

2nd Mixer and 1st IF Amplifier Circuit Supply Voltage. Bypass with a capacitor as close to the pin as

possible. Do not share the bypass capacitor ground vias with any other branches.

38, 39

IFIN+,

IFIN-

Differential IF Inputs. Connected to the SAW filter outputs.

40

IFVGA

IF VGA Control. See the Typical Operating Characteristics.

41

IF VGA Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not share the bypass

capacitor ground vias with any other branches.

42, 43

IFOUT2+,

IFOUT2-

IF VGA Outputs

44

HI-IF Filter Circuit Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not share the

bypass capacitor ground vias with any other branches.

46

BIAS

Bias Resistor Connection. Connect a 5.9k

Ω precision ±1% resistor to GND. Resistor value can be increased

to decrease the nominal current at the expense of linearity. Refer to Application Note:

MAX3570/MAX3571/MAX3573 Bias Resistor Setting for further information.

47

RFVGA

RF VGA Control. See the Typical Operating Characteristics.

48

LNABIAS

LNA Bias Input. Connect through an inductor to GND. (Refer to the EV kit.)

EP

GND

Exposed Ground Paddle. DC and AC GND return for the IC. Connect to PC board ground plane using

multiple vias.

Pin Description (continued)