AD8331ARQZ-RL

更新时间： 2024-11-21 04:30:59

品牌	Logo	应用领域
亚德诺 - ADI		消费电路商用集成电路放大器光电二极管
页数	文件大小	规格书
40页	876K
描述
Ultralow Noise VGAs with Preamplifier and Programmable RIN

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AD8331ARQZ-RL 数据手册

Ultralow Noise VGAs with

Preamplifier and Programmable R_IN

AD8331/AD8332/AD8334

FEATURES

FUNCTIONAL BLOCK DIAGRAM

LON LOP VIP VIN

VCM

HILO

Ultralow noise preamplifier

Voltage noise = 0.74 nV/√Hz

Current noise = 2.5 pA/√Hz

3 dB bandwidth

AD8331: 120 MHz

3.5dB/15.5dB

MID

LNA

INH

–

ATTENUATOR

VOH

VOL

48dB

19dB

21dB

–

LMD

AD8332, AD8334: 100 MHz

Low power

AD8331: 125 mW/channel

CLAMP

GAIN

LNA VCM

BIAS

VGA BIAS AND

INTERPOLATOR

RCLMP

CONTROL

INTERFACE

AD8331/AD8332/AD8334

AD8332, AD8334: 145 mW/channel

Wide gain range with programmable postamp

−4.5 dB to +43.5 dB

ENB

GAIN

Figure 1. Signal Path Block Diagram

+7.5 dB to +55.5 dB

Low output-referred noise: 48 nV/√Hz typical

Active input impedance matching

Optimized for 10-bit/12-bit ADCs

Selectable output clamping level

Single 5 V supply operation

AD8332 and AD8334 available in lead frame chip scale package

= 1V

GAIN

HIGH GAIN

MODE

= 0.8V

= 0.6V

= 0.4V

GAIN

= 0.2V

= 0V

APPLICATIONS

GAIN

Ultrasound and sonar time-gain controls

High performance AGC systems

I/Q signal processing

–10

100k

High speed, dual ADC drivers

10M

FREQUENCY (Hz)

100M

GENERAL DESCRIPTION

Figure 2. Frequency Response vs. Gain

The AD8331/AD8332/AD8334 are single-, dual-, and quad-

channel ultralow noise, linear-in-dB, variable gain amplifiers

(VGAs). Optimized for ultrasound systems, they are usable as a

low noise variable gain element at frequencies up to 120 MHz.

Differential signal paths result in superb second- and third-

order distortion performance and low crosstalk.

The VGA’s low output-referred noise is advantageous in driving

high speed differential ADCs. The gain of the postamplifier can

be pin selected to 3.5 dB or 15.5 dB to optimize gain range and

output noise for 12-bit or 10-bit converter applications. The

output can be limited to a user-selected clamping level,

preventing input overload to a subsequent ADC. An external

resistor adjusts the clamping level.

Included in each channel are an ultralow noise preamplifier

(LNA), an X-AMP® VGA with 48 dB of gain range, and a

selectable gain postamplifier with adjustable output limiting.

The LNA gain is 19 dB with a single-ended input and

differential outputs. Using a single resistor, the LNA input

impedance can be adjusted to match a signal source without

compromising noise performance.

The operating temperature range is −40°C to +85°C. The

AD8331 is available in a 20-lead QSOP package, the AD8332 is

available in 28-lead TSSOP and 32-lead LFCSP packages, and

the AD8334 is available in a 64-lead LFCSP package.

The 48 dB gain range of the VGA makes these devices suitable

for a variety of applications. Excellent bandwidth uniformity is

maintained across the entire range. The gain control interface

provides precise linear-in-dB scaling of 50 dB/V for control

voltages between 40 mV and 1 V. Factory trim ensures excellent

part-to-part and channel-to-channel gain matching.

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 registeredtrademarks arethe 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

12 3 4 5 6 7...40

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AD8331ARQZ-RL 替代型号

型号	品牌	替代类型	描述	数据表
AD8331ARQZ	ADI	类似代替	Ultralow Noise VGAs with Preamplifier and Programmable RIN
AD8331ARQZ-R7	ADI	类似代替	Ultralow Noise VGAs with Preamplifier and Programmable RIN

与AD8331ARQZ-RL相关器件

型号	品牌	获取价格	描述	数据表
AD8331-EVAL	ADI	获取价格	Ultralow Noise VGAs with Preamplifier and Programmable RIN
AD8331-EVALZ	ADI	获取价格	Ultralow Noise VGAs with Preamplifier and Programmable RIN
AD8331TRQZ-EP	ADI	获取价格	Single VGA with Ultralow Noise Preamplifier and Programmable RIN
AD8331TRQZ-EP-R7	ADI	获取价格	Single VGA with Ultralow Noise Preamplifier and Programmable RIN
AD8332	ADI	获取价格	Ultralow Noise VGAs with Preamplifier and Programmable RIN
AD8332_15	ADI	获取价格	Ultralow Noise VGAs with Preamplifier and Programmable R
AD8332ACP-R2	ADI	获取价格	Ultralow Noise VGAs with Preamplifier and Programmable RIN
AD8332ACP-REEL	ADI	获取价格	Ultralow Noise VGAs with Preamplifier and Programmable RIN
AD8332ACP-REEL7	ADI	获取价格	Ultralow Noise VGAs with Preamplifier and Programmable RIN
AD8332ACPZ-R2	ADI	获取价格	Ultralow Noise VGAs with Preamplifier and Programmable RIN

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