Datasheet > AD8338ACPZ-RL

AD8338ACPZ-RL

更新时间： 2024-11-25 12:52:27

品牌	Logo	应用领域
亚德诺 - ADI		放大器
页数	文件大小	规格书
16页	406K
描述
Low Power, 18 MHz Variable Gain Amplifier

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AD8338ACPZ-RL 数据手册

Low Power, 18 MHz Variable Gain Amplifier

AD8338

Data Sheet

FEATURES

FUNCTIONAL BLOCK DIAGRAM

VBAT OFSN VREF

Voltage controlled gain range of 0 dB to 80 dB

3 mA supply current at gain of 40 dB

Low frequency (LF) to 18 MHz operation

Supply range: 3.0 V to 5.0 V

Adjustable gain range

Low noise: 4.5 nV/√Hz

Fully differential signal path

Offset correction (offset null) feature

Adjustable bandwidth

Internal 1.5 V reference

16-lead LFCSP

OFFSET NULL

FBKP

AD8338

VGA CORE

INPR

OUTP

OUTM

OUTPUT

STAGE

0dB

–

INMR

INPD

INMD

0dB TO 80dB

VREF

FBKM

AUTOMATIC

GAIN

CONTROL

GAIN INTERFACE

Automatic gain control feature

Wide gain range for high dynamic range signals

COMM

MODE GAIN

DETO

VAGC

APPLICATIONS

Figure 1.

Front end for inductive telemetry systems

Ultrasonic signal receivers

RF baseband signal conditioning

100

= 1.1V

GAIN

= 1.0V

= 0.9V

= 0.8V

= 0.7V

= 0.6V

= 0.5V

= 0.4V

= 0.3V

GAIN

GENERAL DESCRIPTION

The AD8338 is a variable gain amplifier (VGA) for applications

that require a fully differential signal path, low power, low noise,

and a well-defined gain over frequencies from LF to 18 MHz. The

device can also operate using single-ended sources if required.

= 0.2V

= 0.1V

GAIN

The basic gain function is linear-in-dB with a nominal gain range

of 0 dB to 80 dB; the nominal gain range corresponds to a control

voltage on the GAIN pin of 0.1 V to 1.1 V. The gain range can be

adjusted up or down via direct access to the internal summing

nodes at the INPD and INMD pins. For example, if a 47 Ω resistor

is applied to the INPD and INMD pins, a gain range of 20 dB to

100 dB is set with an input referred noise level of 1.5 nV√Hz.

–20

–40

10k

100k

FREQUENCY (Hz)

10M

100M

Figure 2. Gain vs. Frequency

The AD8338 offers additional versatility by allowing user access

to the internal summing nodes. With a few discrete components,

users can customize the gain, bandwidth, input impedance, and

noise profile of the part to fit their application.

The AD8338 includes additional circuits to enable offset correction

and automatic gain control (AGC). DC offset voltages are removed

by the offset correction circuit, which behaves like a high-pass filter.

The high-pass filter corner frequency is set using an external

capacitor. The AGC function varies the gain of the AD8338 to

maintain a constant rms output voltage. A user supplied voltage

controls the target output rms voltage. A user supplied capacitor

to ground at the DETO pin controls the response time of the

AGC circuit.

The AD8338 uses a single supply voltage of 3.0 V to 5.0 V and is

very power efficient, consuming as little as 3 mA quiescent current.

The AD8338 is available in a 3 mm × 3 mm, RoHS compliant,

16-lead LFCSP. It is specified over the industrial temperature range

of −40°C to +85°C.

Rev. 0

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

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

Technical Support

www.analog.com

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AD8338ACPZ-RL 替代型号

型号	品牌	替代类型	描述	数据表
AD8338ACPZ-R7	ADI	类似代替	Low Power, 18 MHz Variable Gain Amplifier

与AD8338ACPZ-RL相关器件

型号	品牌	获取价格	描述	数据表
AD8338-EVALZ	ADI	获取价格	Low Power, 18 MHz Variable Gain Amplifier
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AD8339ACPZ	ADI	获取价格	DC to 50 MHz, Quad I/Q Demodulator and Phase Shifter
AD8339ACPZ-R7	ADI	获取价格	DC to 50 MHz, Quad I/Q Demodulator and Phase Shifter
AD834	ADI	获取价格	500 MHz Four-Quadrant Multiplier
AD834_12	ADI	获取价格	500 MHz Four-Quadrant Multiplier
AD8340	ADI	获取价格	700 MHz to 1000 MHz RF Vector Modulator
AD8340ACP	ADI	获取价格	IC TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, QCC24, LFCSP-24, Cellular Telephone Circuit
AD8340ACPZ-REEL7	ADI	获取价格	700 MHz to 1000 MHz RF Vector Modulator
AD8340ACPZ-WP	ADI	获取价格	700 MHz to 1000 MHz RF Vector Modulator

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