Datasheet > AD6458

AD6458

更新时间： 2024-11-28 22:49:59

品牌	Logo	应用领域
亚德诺 - ADI		GSM
页数	文件大小	规格书
12页	270K
描述
GSM 3 V Receiver IF Subsystem

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AD6458 数据手册

GSM 3 V Receiver IF Subsystem

AD6458

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Fully Compliant with Standard and Enhanced GSM

Specification

–12 dBm Input 1 dB Compression Point

–2 dBm Input Third Order Intercept

10 dB SSB Noise Figure (330 ⍀)

DC–400 MHz RF and LO Bandwidths

Linear IF Amplifier

PLO

BPF

Linear-in-dB and Stable over Temperature Voltage

Gain Control

Quadrature Demodulator

AGC

FREF

AD6458

Onboard Phase-Locked Quadrature Oscillator

Demodulates IFs from 5 MHz to 50 MHz

Low Power

9 mA at Midgain

1 ␮A Sleep Mode Operation

3.0 V to 3.6 V Operation

Interfaces to AD7013, AD7015 and AD6421 Baseband

Converters

20-Lead SSOP

quadrature VCO which is externally phase-locked to the IF

GENERAL DESCRIPTION

signal drives the I and Q demodulators. This locked reference

signal is normally provided by an external VCTCXO under the

control of the radio’s digital processor. The AD6458 can also

provide demodulation of N-PSK and N-QAM in many non-

TDMA systems when used with external analog carrier recovery

systems such as the Costas Loop. Finally, the VCO can be

phase-locked to a frequency which is deliberately offset from the

IF, as in the case of a Beat-Frequency Oscillator (BFO), result-

ing in the product detection of CW or SSB.

The AD6458 is a 3 V, low power receiver IF subsystem for

operation at input frequencies as high as 400 MHz and IFs from

5 MHz up to 50 MHz. It is optimized for operation in GSM,

DCS1800 and PCS1900 receivers. It consists of a mixer, IF

amplifier, I and Q demodulators, a phase-locked quadrature

oscillator, precise AGC subsystem, and a biasing system with

external power-down.

The low noise, high intercept mixer of the AD6458 is a

doubly-balanced Gilbert cell type. It has a nominal –12 dBm

input-referred 1 dB compression point and a –2 dBm input-

referred third-order intercept. The mixer section of the AD6458

also includes a local oscillator (LO) preamplifier, which lowers

the required LO drive to –16 dBm.

The AD6458 uses supply voltages from 3.0 V to 3.6 V over the

temperature range of –40°C to +85°C. Operation is enabled by

a CMOS logical level; response time is typically <80 µs. When

disabled, the standby current is reduced to 1 µA.

The AD6458 comes in a 20-lead shrink small outline (SSOP)

surface-mount package.

The gain control input accepts an external gain-control voltage

input from an external AGC detector or a DAC. It provides an

80 dB gain range with 27 mV/dB gain scaling.

The I and Q demodulators provide inphase and quadrature

baseband outputs to interface with Analog Devices’ AD7013

(IS54, TETRA, MSAT) and AD7015 and AD6421 (GSM,

DCS1800, PCS1900) baseband converters. An onboard

REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

Fax: 617/326-8703

World Wide Web Site: http://www.analog.com

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与AD6458相关器件

型号	品牌	获取价格	描述	数据表
AD6458ARS	ADI	获取价格	GSM 3 V Receiver IF Subsystem
AD6459	ADI	获取价格	GSM 3 V Receiver IF Subsystem
AD6459ARS	ADI	获取价格	GSM 3 V Receiver IF Subsystem
AD6459ARS-REEL	ADI	获取价格	IC SPECIALTY TELECOM CIRCUIT, PDSO20, PLASTIC, SSOP-20, Telecom IC:Other
AD645A	ADI	获取价格	Low Noise, Low Drift FET Op Amp
AD645ACHIPS	ADI	获取价格	IC OP-AMP, 1000 uV OFFSET-MAX, 2 MHz BAND WIDTH, UUC, DIE, Operational Amplifier
AD645AH	ADI	获取价格	Low Noise, Low Drift FET Op Amp
AD645B	ADI	获取价格	Low Noise, Low Drift FET Op Amp
AD645BCHIPS	ADI	获取价格	IC OP-AMP, 400 uV OFFSET-MAX, 2 MHz BAND WIDTH, UUC, DIE, Operational Amplifier
AD645BH	ADI	获取价格	Low Noise, Low Drift FET Op Amp

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