MAX2116(2005) 데이터 시트보기 (PDF) - Maxim Integrated

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MAX2116
(Rev.:2005)

Complete DBS Direct-Conversion Tuner ICs with Monolithic VCOs

Maxim Integrated 

Complete DBS Direct-Conversion Tuner ICs

with Monolithic VCOs

Pin Description

PIN

NAME

FUNCTION

1, 2

IDC-, IDC+

I-Channel Baseband DC Offset Correction. Connect a 0.1µF ceramic chip capacitor from IDC-

to IDC+.

3

VCCRF1

DC Power Supply for LNA and First-Stage RF VGA. Connect to a 5V ±5% low-noise supply.

Bypass with a 1nF capacitor directly to GND. Do not share vias.

4

RFIN-

75Ω RF-Inverting Input. Working in conjunction with RFIN+ for differential input. Terminate with

22pF capacitor in series with a 75Ω resistor to GND for single-ended input.

5

RFIN+

75Ω RF Noninverting Input. Working in conjunction with RFIN- for differential input. Connect to

source through a 22pF series capacitor.

6, 9, 11, 25,

31

N.C.

No Connection. Pin should be connected directly to GND.

7

GC1

Gain Control Input for RF Front End. High-impedance analog input with an operating range of

0.75V to 2.6V. VGC1 = 0.75V corresponds to maximum gain.

8, 28

VREG1, VREG2

2.85V Linear Regulator. Used for terminating open-drain interfaces from demodulator. Each

regulator can source 3mA.

10

PAD

Ground. Direct connection to exposed pad. Can be used to check exposed pad continuity to

ground.

12

VCCLO

DC Power Supply for LO Circuits. Connect to a 5V ±5% low-noise supply. Bypass with a 1nF

capacitor directly to GND. Do not share vias.

13

14

15, 26, 32

16

17

18

19

VCCVCO

LOFLT

AS2, AS1, AS0

VTUNE

CPOUT

IFLT

VCCCPX

DC Power Supply for VCO Circuits. Connect to a 5V ±5% low-noise supply. See the

Applications Information section for more details.

LO Internal Regulator Bypass. Bypass with a 0.22µF ceramic chip capacitor to GND.

I2C Address Select Control. See Table 1 and Table 2. These pins are internally pullup

to VCC. For logic high, leave these pins open.

High Impedance VCO Tune Input

Charge-Pump Output

Test Pin. For normal operation, connect IFLT to ground.

DC Power Supply for Charge Pump and XTAL Oscillator Circuits. Connect to a 5V ±5% low-

noise supply. Bypass with a 1nF capacitor directly to GND. Do not share vias.

20

21, 22

23

24

27, 29

30

33

CFLT

Bypass for Internal Crystal Oscillator Bias. Bypass with a 0.22uF ceramic chip capacitor to

GND.

XTL+, XTAL- Crystal Oscillator Interface. See Typical Operating Circuit.

CNTOUT

Test Pin. Must be left open.

XTALOUT

SDA, SCL

Crystal Oscillator Buffer Output. Requires a 10nF DC-blocking capacitor.

I2C Data and Clock Interface. See the Applications Information section for details.

VCCDIG

DC Power Supply for Digital Circuits. Connect to a 5V ±5% low-noise supply. Bypass with a 1nF

capacitor directly to GND. Do not share vias.

N.C. (MAX2116) No Connection. Pin should be connected directly to GND.

QOUT- (MAX2118) Inverting Baseband Quadrature Output

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