MAX2165 Просмотр технического описания (PDF) - Maxim Integrated

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MAX2165

Single-Conversion DVB-H Tuner

Maxim Integrated 

Single-Conversion DVB-H Tuner

Pin Description (continued)

PIN

NAME

FUNCTION

14

BBQ+

Noninverting Quadrature Baseband Output

15

BBI-

Inverting In-Phase Baseband Output

16

BBI+

Noninverting In-Phase Baseband Output

17

BB_AGC

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

maximum baseband gain.

18

VCC_VCO

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.

19

VTUNE

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

20

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

21

LDO

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

as close as possible to the pin.

22

CP

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

23

VCC_SYN 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

24

MUX

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.

25

REFOUT

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.

26

VCC_XTAL

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.

27

XB

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

a reference oscillator.

28

XE

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.

EP

EP

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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