AD8432-EVALZ

更新时间： 2024-02-19 12:37:51

品牌	Logo	应用领域
亚德诺 - ADI		放大器
页数	文件大小	规格书
28页	723K
描述
Dual-Channel Ultralow Noise Amplifier with Selectable Gain and Input Impedance

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AD8432-EVALZ 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	QFN
包装说明：	HVQCCN, LCC24,.16SQ,20	针数：	24
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.31.00.01	风险等级：	2.32
放大器类型：	OPERATIONAL AMPLIFIER	最大输入失调电压：	6250 µV
JESD-30 代码：	S-XQCC-N24	JESD-609代码：	e3
长度：	4 mm	湿度敏感等级：	3
功能数量：	2	端子数量：	24
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	UNSPECIFIED	封装代码：	HVQCCN
封装等效代码：	LCC24,.16SQ,20	封装形状：	SQUARE
封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	峰值回流温度（摄氏度）：	260
电源：	5 V	认证状态：	Not Qualified
座面最大高度：	0.8 mm	标称压摆率：	295 V/us
子类别：	Operational Amplifier	供电电压上限：	5.5 V
标称供电电压 (Vsup)：	5 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	MATTE TIN
端子形式：	NO LEAD	端子节距：	0.5 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	4 mm	Base Number Matches：	1

AD8432-EVALZ 数据手册

Dual-Channel Ultralow Noise Amplifier with

Selectable Gain and Input Impedance

AD8432

FUNCTIONAL BLOCK DIAGRAM

FEATURES

ENB

VPS1

VPS2

COMM

Low noise

Input voltage noise: 0.85 nV/√Hz

Current noise: 2.0 pA/√Hz

Excellent ac specifications

200 MHz bandwidth (G = 12.04 dB)

295 V/μs slew rate

Selectable gain

G = 12.04 dB (×4)

G = 18.06 dB (×8)

BIAS

AD8432

INH1

IND1

OPH1

OPL1

LNA1

GMH1

GOH1

GOL1

GML1

INL1

INH2

IND2

G = 21.58 dB (×12)

G = 24.08 dB (×16)

OPH2

OPL2

LNA2

Active input impedance matching

Integrated input clamp diodes

Single-ended input, differential output

Supply range: 4.5 V to 5.5 V

Low power: 60 mW/channel

GMH2

GOH2

GOL2

GML2

INL2

Figure 1.

APPLICATIONS

CW Doppler ultrasound front ends

Low noise preamplification

Predriver for I/Q demodulators and phase shifters

Wideband analog-to-digital drivers

GENERAL DESCRIPTION

The AD8432 is a dual-channel, low power, ultralow noise

amplifier with selectable gain and active impedance matching.

Each amplifier has a single-ended input, differential output, and

integrated input clamps. By pin strapping the gain setting pins, four

accurate gains of G = 12.04 dB, 18.06 dB, 21.58 dB, and 24.08 dB

(×4, ×8, ×12, and ×16) are possible. A bandwidth of 200 MHz at

G = 12.04 dB makes this amplifier well suited for many high speed

applications.

The AD8432 achieves 0.85 nV/√Hz input referred voltage noise for

a gain of 12.04 dB. The AD8432’s ultralow noise, low distortion,

excellent gain accuracy, and channel-to-channel matching are ideal

for high performance ultrasound systems and for processing I/Q

demodulator signals.

The AD8432 operates on a single supply of 5 V at 24 mA. It is

available in a 4 mm × 4 mm, 24-lead LFSCP. The LFCSP features

an exposed paddle that provides a low thermal resistance path to

the PCB, which enables more efficient heat transfer and increases

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

The exceptional noise performance of the AD8432 is made

possible by the active impedance matching. Using a feedback

network, the input impedance of the amplifiers can be adjusted

to match the signal source impedance without compromising

the noise performance. Impedance matching and low noise of

the AD8432 allow designers to create wider dynamic range

systems that are able to detect even very low level signals.

Rev. 0

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

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