MAX2165EVKIT+【PDF 8/24 页】KIT EVAL FOR MAX2165

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Single-Conversion DVB-H Tuner

Pin Description (continued)

PIN

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

EP

NAME

BBQ+

BBI-

BBI+

BB_AGC

VCC_VCO

VTUNE

GND_TUNE

LDO

CP

VCC_SYN

MUX

REFOUT

VCC_XTAL

XB

XE

EP

FUNCTION

Noninverting Quadrature Baseband Output

Inverting In-Phase Baseband Output

Noninverting In-Phase Baseband Output

Baseband Gain-Control Voltage Input. Accepts voltages from 0.4V to 2.3V with 2.3V providing the

maximum baseband gain.

VCO Power-Supply Input. Connect to a low-noise power-supply voltage. Bypass to the PCB ground

plane with a 1000pF and 100nF capacitor placed as close as possible to the pin.

VCO Tuning Voltage Input. Connect to the PLL loop filter output.

VCO Tuning Voltage Ground. Connect to the PCB ground plane.

VCO Linear-Regulator Noise Bypass. Bypass to the PCB ground plane with a 470nF capacitor placed

as close as possible to the pin.

Charge-Pump Output. Connect to the PLL loop filter input.

Synthesizer Power-Supply Input. Connect to a low-noise power-supply voltage. Bypass to the PCB

ground plane with a 1000pF and 100nF capacitor placed as close as possible to the pin.

Multiplexed Output Line. Output for various test functions, can also be used as a PLL lock-detect

indicator. See Table 9 for more information. When used as a PLL lock detector, logic-high indicates

PLL is not locked and logic-low indicates PLL is locked.

Reference Buffer Output. Provides a buffered crystal-oscillator signal that can be used as a clock

reference for the demodulator. Requires a DC-blocking capacitor.

Crystal-Oscillator Power-Supply Input. Connect to a low-noise power-supply voltage. Bypass to the

PCB ground plane with a 1000pF and 100nF capacitor placed as close as possible to the pin.

Reference Input. Connect to a parallel resonant mode crystal through a load-matching capacitor or to

a reference oscillator.

Reference-Oscillator Feedback Input. Connect to a capacitive feedback network when the on-chip

reference oscillator is used. Leave unconnected when an external reference is used.

Exposed Paddle. Solder evenly to the board’s ground plane to achieve the lowest impedance path.

Detailed Description

Register Descriptions

The MAX2165 includes 15 programmable registers and

three read-only registers. See Table 1 for register con-

figurations. The register configuration of Table 1 shows

each bit name and the bit usage information for all reg-

isters. U labeled under each bit name indicates that the

bit value is user defined to meet specific application

requirements. A 0 or 1 indicates that the bit must be set

to the defined 0 or 1 value for proper operation.

Operation is not tested or guaranteed if these bits are

programmed to other values and is only for

factory/bench evaluation. In typical application, always

program to the operation defined state.

See Tables 2–19 for detailed descriptions of each reg-

ister. All registers must be written 100μs after power-up

and no earlier than 100μs after power-up.

8

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