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AD8310ARMZ-REEL7

更新时间： 2024-11-27 04:30:59

品牌	Logo	应用领域
亚德诺 - ADI		模拟计算功能信号电路放大器光电二极管
页数	文件大小	规格书
24页	537K
描述
Fast, Voltage-Out DC-440 MHz, 95 dB Logarithmic Amplifier

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AD8310ARMZ-REEL7 数据手册

Fast, Voltage-Out DC–440 MHz,

95 dB Logarithmic Amplifier

AD8310

FEATURES

Multistage demodulating logarithmic amplifier

FUNCTIONAL BLOCK DIAGRAM

AD8310

Voltage output, rise time <15 ns

VPOS

ENBL

BFIN

BAND GAP REFERENCE

AND BIASING

8mA

ENABLE

SUPPLY

High current capacity: 25 mA into grounded R_L

95 dB dynamic range: −91 dBV to +4 dBV

Single supply of 2.7 V min at 8 mA typ

DC–440 MHz operation, 0.4 dB linearity

Slope of +24 mV/dB, intercept of −108 dBV

Highly stable scaling over temperature

Fully differential dc-coupled signal path

100 ns power-up time, 1 mA sleep current

SIX 14.3dB 900MHz

AMPLIFIER STAGES

BUFFER

INPUT

INHI

+INPUT

–INPUT

1.0kΩ

INLO

MIRROR

2μA

3kΩ

–

VOUT

OUTPUT

3kΩ

NINE DETECTOR CELLS

SPACED 14.3dB

COMM

1kΩ

COMM

COMMON

COMM

OFLT

33pF

OFFSET

FILTER

INPUT-OFFSET

COMPENSATION LOOP

COMM

APPLICATIONS

Conversion of signal level to decibel form

Transmitter antenna power measurement

Receiver signal strength indication (RSSI)

Low cost radar and sonar signal processing

Network and spectrum analyzers

Figure 1.

Signal-level determination down to 20 Hz

True-decibel ac mode for multimeters

The fully differential input offers a moderately high impedance

(1 kΩ in parallel with about 1 pF). A simple network can match

the input to 50 Ω and provide a power sensitivity of −78 dBm to

+17 dBm. The logarithmic linearity is typically within 0.4 dB

up to 100 MHz over the central portion of the range, but it is

somewhat greater at 440 MHz. There is no minimum frequency

limit; the AD8310 can be used down to low audio frequencies.

Special filtering features are provided to support this wide

range.

GENERAL DESCRIPTION

The AD8310 is a complete, dc−440 MHz demodulating

logarithmic amplifier (log amp) with a very fast voltage mode

output, capable of driving up to 25 mA into a grounded load in

under 15 ns. It uses the progressive compression (successive

detection) technique to provide a dynamic range of up to 95 dB

to 3 dB law conformance or 90 dB to a 1 dB error bound up

to 100 MHz. It is extremely stable and easy to use, requiring no

significant external components. A single-supply voltage of

2.7 V to 5.5 V at 8 mA is needed, corresponding to a power

consumption of only 24 mW at 3 V. A fast-acting CMOS-

compatible enable pin is provided.

The output voltage runs from a noise-limited lower boundary of

400 mV to an upper limit within 200 mV of the supply voltage

for light loads. The slope and intercept can be readily altered

using external resistors. The output is tolerant of a wide variety

of load conditions and is stable with capacitive loads of 100 pF.

Each of the six cascaded amplifier/limiter cells has a small-

signal gain of 14.3 dB, with a −3 dB bandwidth of 900 MHz.

A total of nine detector cells are used to provide a dynamic

range that extends from −91 dBV (where 0 dBV is defined as

the amplitude of a 1 V rms sine wave), an amplitude of about

40 ꢀV, up to +4 dBV (or 2.2 V). The demodulated output

is accurately scaled, with a log slope of 24 mV/dB and an

intercept of −108 dBV. The scaling parameters are supply-

and temperature-independent.

The AD8310 provides a unique combination of low cost, small

size, low power consumption, high accuracy and stability, high

dynamic range, a frequency range encompassing audio to UHF,

fast response time, and good load-driving capabilities, making

this product useful in numerous applications that require the

reduction of a signal to its decibel equivalent.

The AD8310 is available in the industrial temperature range of

−40°C to +85°C in an 8-lead MSOP package.

Rev. E

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 that may result from its 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 and

registered trademarks are the property of their respective owners.

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

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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AD8310ARMZ-REEL7 替代型号

型号	品牌	替代类型	描述	数据表
AD8310ARMZ	ADI	类似代替	Fast, Voltage-Out DC-440 MHz, 95 dB Logarithmic Amplifier
AD8310ARM-REEL7	ADI	类似代替	Fast, Voltage-Out DC-440 MHz 95 dB Logarithmic Amplifier
AD8310ARM	ADI	类似代替	Fast, Voltage-Out DC-440 MHz 95 dB Logarithmic Amplifier

与AD8310ARMZ-REEL7相关器件

型号	品牌	获取价格	描述	数据表
AD8310ARMZ-REEL71	ADI	获取价格	Fast, Voltage-Out DC-440 MHz, 95 dB Logarithmic Amplifier
AD8310-EVAL	ADI	获取价格	Fast, Voltage-Out DC-440 MHz 95 dB Logarithmic Amplifier
AD8311	ADI	获取价格	50 dB GSM PA Controller
AD8311ACBZ-P2	ADI	获取价格	50 dB GSM PA Controller
AD8311ACBZ-P7	ADI	获取价格	50 dB GSM PA Controller
AD8311-EVAL	ADI	获取价格	50 dB GSM PA Controller
AD8312	ADI	获取价格	100 MHz-2.7 GHz, 45 dB RF Log Detector
AD8312_05	ADI	获取价格	50 MHz to 3.5 GHz, 45 dB RF Detector
AD8312ACBZ-P2	ADI	获取价格	50 MHz to 3.5 GHz, 45 dB RF Detector
AD8312ACBZ-P7	ADI	获取价格	50 MHz to 3.5 GHz, 45 dB RF Detector

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