AD7750AR

更新时间： 2024-09-23 22:49:59

品牌	Logo	应用领域
亚德诺 - ADI		转换器模拟IC 信号电路光电二极管
页数	文件大小	规格书
16页	198K
描述
Product-to-Frequency Converter

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中文翻译

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AD7750AR 数据手册

Product-to-Frequency

Converter

AD7750

FEATURES

FUNCTIO NAL BLO CK D IAGRAM

Tw o Differential Analog Input Channels

Product of Tw o Channels

VDD ACDC

Voltage-to-Frequency Conversion on a Single Channel

Real Pow er Measurem ent Capability

< 0.2% Error Over the Range 400% Ibasic to 2% Ibasic

Tw o or Four Quadrant Operation (Positive and

Negative Pow er)

Gain Select of 1 or 16 on the Current Channel (Channel 1)

Choice of On-Chip or External Reference

Choice of Output Pulse Frequencies Available

(Pins F1 and F2)

ADC1

REVP

2ND ORDER

MODULATOR

x16

DELAY

CLKOUT

CLKIN

1–

HPF

ADC2

MULT

2–

2ND ORDER

MODULATOR

DTF

High Frequency Pulse Output for Calibration Purposes

2.5V

BAND GAP

REFERENCE

LPF

(F_OUT

)

HPF on Current Channel for Offset Rem oval

Single 5 V Supply and Low Pow er

DTF

OUT

AD7750

AGND REFOUT

REFIN

FS S1 S2 DGND

GENERAL D ESCRIP TIO N

P RO D UCT H IGH LIGH TS

T he AD7750 is a Product-to-Frequency Converter (PFC)

that can be configured for power measurement or voltage-to-

frequency conversion. T he part contains the equivalent of two

channels of A/D conversion, a multiplier, a digital-to-frequency

converter, a reference and other conditioning circuitry. Channel 1

has a differential gain amplifier with selectable gains of 1 or 16.

Channel 2 has a differential gain amplifier with a gain of 2. A high-

pass filter can be switched into the signal path of Channel 1 to

remove any offsets.

1. T he part can be configured for power measurement or

voltage-to-frequency conversion.

2. T he output format and maximum frequency is selectable;

from low-frequency outputs, suitable for driving stepper

motors, to higher frequency outputs, suitable for calibration

and test.

3. T here is a reverse polarity indicator output that becomes

active when negative power is detected in the Magnitude

Only Mode.

T he outputs F1 and F2 are fixed width (275 ms) logic low going

pulse streams for output frequencies less than 1.8 Hz. A range

of output frequencies is available and the frequency of F1 and

F2 is proportional to the product of V₁and V₂. T hese outputs

are suitable for directly driving an electromechanical pulse

counter or full stepping two phase stepper motors. T he outputs

can be configured to represent the result of four-quadrant multi-

plication (i.e., Sign and Magnitude) or to represent the result of

a two quadrant multiplication (i.e., Magnitude Only). In this

configuration the outputs are always positive regardless of the

input polarities. In addition, there is a reverse polarity indicator

output that becomes active when negative power is detected in

the Magnitude Only Mode, see Reverse Polarity Indicator.

4. Error as a % of reading over a dynamic range of 1000:1 is

< 0.3%.

T he error as a percent (%) of reading is less than 0.3% over a

dynamic range of 1000:1.

T he AD7750 is fabricated on 0.6 µ CMOS technology; a pro-

cess that combines low power and low cost.

REV. 0

Inform ation furnished by Analog Devices is believed to be accurate and

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

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

which m ay result from its use. No license is granted by im plication or

otherwise under any patent or patent rights of Analog Devices.

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

Tel: 781/ 329-4700

Fax: 781/ 326-8703

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

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与AD7750AR相关器件

型号	品牌	获取价格	描述	数据表
AD7750AR-REEL	ADI	获取价格	IC SPECIALTY ANALOG CIRCUIT, PDSO20, SOIC-20, Analog IC:Other
AD7750AR-REEL	ROCHESTER	获取价格	SPECIALTY ANALOG CIRCUIT, PDSO20, SOIC-20
AD7750BN	ADI	获取价格	IC SPECIALTY ANALOG CIRCUIT, PDIP20, PLASTIC, DIP-20, Analog IC:Other
AD7750BR	ADI	获取价格	IC SPECIALTY ANALOG CIRCUIT, PDSO20, SOIC-20, Analog IC:Other
AD7751	ADI	获取价格	Energy Metering IC With On-Chip Fault Detection
AD7751AAN	ADI	获取价格	Energy Metering IC With On-Chip Fault Detection
AD7751AAN-REF	ADI	获取价格	Energy Metering IC With On-Chip Fault Detection
AD7751AARS	ADI	获取价格	Energy Metering IC With On-Chip Fault Detection
AD7751ABRS	ADI	获取价格	Energy Metering IC With On-Chip Fault Detection
AD7751AN	ADI	获取价格	暂无描述

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