Datasheet > MAX2308

MAX2308

更新时间： 2023-12-20 18:44:05

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
20页	192K
描述
CDMA IF VGA及I/Q解调器，带有VCO及合成器

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数据手册

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MAX2308 数据手册

CDMA IF VGAs a n d I/Q De m o d u la t o rs

w it h VCO a n d S yn t h e s ize r

P in De s c rip t io n

NAME

FUNCTION

MAX2306

MAX2308

MAX2309

TANKL+,

TANKL-

1, 28

—

Differential Tank Input for Low-Frequency Oscillator

No Connection. Must be left open-circuit.

—

1, 4

2, 3

—

N.C.

TANKH+,

TANKH-

2, 3

1, 2

Differential Tank Input for High-Frequency Oscillator

—

BUFEN

LO Buffer Amplifier—active low

—

MODE

Mode Select. High selects CDMA mode; low selects FM mode.

Internal VCO Output. Depending on setting of BD bit, LOOUT is

either the VCO frequency (twice the IF frequency) or one-half the

VCO frequency (equal to the IF frequency).

—

LOOUT

+2.7V to +5.5V Supply

Ground

GND

REF

Reference Frequency Input

Shutdown Input—active low. Low powers down entire device,

including registers and serial interface.

SHDN

IOUT+,

IOUT-

Differential In-Phase Baseband Output, or FM signal output if FM_I

mode is selected.

9, 10

Lock Output—open-collector pin. Logic high indicates phase-locked

condition.

LOCK

QOUT-,

QOUT+

Differential Quadrature-Phase Baseband Output. Disabled if FM_I

mode is selected.

12, 13

CLK

Clock input of the 3-wire serial bus

Enable Input. When low, input shift register is enabled.

Data input of the 3-wire serial bus.

DATA

+2.7V to +5.5V Supply

VGC

VGA Gain Control Input. Control voltage range is 0.5V to 2.3V.

CDMA-,

CDMA+

19, 20

—

Differential CDMA Input. Active in CDMA mode.

Differential Positive Input. Active in FM mode.

FM+

FM-

Differential Negative Input for FM signal. Bypass to GND for

single-ended operation.

—

Standby Input—active low. Low powers down VGA and demodulator

while keeping VCO, PLL, and serial bus on.

—

STBY

23, 24

BYP

Bypass Node. Must be capacitively decoupled (bypassed) to pin 17.

_______________________________________________________________________________________

1...4 5 678 9 10...20

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