Datasheet > AD8314_18

AD8314_18

更新时间： 2024-11-28 01:19:39

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描述
RF Detector/Controller

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中文翻译

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数据手册

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AD8314_18 数据手册

100 MHz to 2.7 GHz, 45 dB

RF Detector/Controller

AD8314

Data Sheet

For convenience, the signal is internally ac-coupled, using a

5 pF capacitor to a load of 3 kΩ in shunt with 2 pF. This high-

pass coupling, with a corner at approximately 16 MHz,

determines the lowest operating frequency. Therefore, the

source can be dc grounded.

FEATURES

Complete RF detector/controller function

Typical range:−58 dBV to −13 dBV

−45 dBm to 0 dBm, re 50 Ω

Frequency response from 100 MHz to 2.7 GHz

Temperature-stable linear-in-dB response

Accurate to 2.7 GHz

Rapid response: 70 ns to a 10 dB step

Low power: 12 mW at 2.7 V

Power down to 20 µA

The AD8314 provides two voltage outputs. The first, V_UP,

increases from close to ground to about 1.2 V as the input signal

level increases from 1.25 mV to 224 mV. This output is intended

for use in measurement mode. Consult the Applications section

for information on this mode. A capacitor can be connected

between the V_UP and FLTR pins when it is desirable to

increase the time interval over which averaging of the input

waveform occurs.

APPLICATIONS

Cellular handsets (TDMA, CDMA , GSM)

RSSI and TSSI for wireless terminal devices

Transmitter power measurement and control

The second output, V_DN, is an inversion of V_UP but with

twice the slope and offset by a fixed amount. This output starts

at about 2.25 V (provided the supply voltage is ≥3.3 V) for the

minimum input and falls to a value close to ground at the

maximum input. This output is intended for analog control

loop applications. A setpoint voltage is applied to VSET, and

V_DN is then used to control a VGA or power amplifier. Here

again, an external filter capacitor can be added to extend the

averaging time. Consult the Applications section for

information on this mode.

GENERAL DESCRIPTION

The AD8314 is a complete low cost subsystem for the

measurement and control of RF signals in the frequency range

of 100 MHz to 2.7 GHz, with a typical dynamic range of 45 dB,

intended for use in a wide variety of cellular handsets and other

wireless devices. It provides a wider dynamic range and better

accuracy than possible using discrete diode detectors. In

particular, its temperature stability is excellent over the full

operating range of −40°C to +85°C.

The AD8314 is available in 8-lead MSOP and 8-lead LFCSP

packages and consumes 4.5 mA from a 2.7 V to 5.5 V supply.

When powered down, the typical sleep current is 20 µA.

Its high sensitivity allows control at low power levels, thus

reducing the amount of power that needs to be coupled to the

detector. It is essentially a voltage-responding device, with a

typical signal range of 1.25 mV to 224 mV rms or –58 dBV to

−13 dBV. This is equivalent to −45 dBm to 0 dBm, re 50 Ω.

FUNCTIONAL BLOCK DIAGRAM

FLTR

V-I

VSET

V_UP

–

I-V

DET

–

V_DN

RFIN

10dB

VPOS

ENBL

BAND GAP

REFERENCE

OFFSET

COMPENSATION

AD8314

COMM

(PADDLE)

Figure 1.

Rev. C

Document Feedback

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

rightsof third parties that may result fromits use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks andregisteredtrademarks are the property of their respective owners.

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

Technical Support

www.analog.com

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与AD8314_18相关器件

型号	品牌	获取价格	描述	数据表
AD8314ACP-EVAL	ADI	获取价格	100 MHz to 2.7 GHz, 45 dB RF Detector/Controller
AD8314ACP-EVALZ	ADI	获取价格	RF Detector/Controller
AD8314ACP-REEL	ADI	获取价格	100 MHz to 2.7 GHz, 45 dB RF Detector/Controller
AD8314ACP-REEL7	ADI	获取价格	100 MHz to 2.7 GHz, 45 dB RF Detector/Controller
AD8314ACP-WP	ADI	获取价格	100 MHz to 2.7 GHz, 45 dB RF Detector/Controller
AD8314ACPZ	ADI	获取价格	100 MHz to 2.7 GHz, 45 dB RF Detector/Controller
AD8314ACPZ-REEL	ADI	获取价格	100 MHz to 2.7 GHz, 45 dB RF Detector/Controller
AD8314ACPZ-REEL7	ADI	获取价格	IC SPECIALTY TELECOM CIRCUIT, DSO8, 2 X 3 MM, LFCSP-8, Telecom IC:Other
AD8314ACPZ-RL7	ADI	获取价格	100 MHz to 2.7 GHz, 45 dB RF Detector/Controller
AD8314ARM	ADI	获取价格	100 MHz-2500 MHz 45 dB RF Detector/Controller

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