LMH6502

更新时间： 2024-09-15 22:31:11

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器
页数	文件大小	规格书
19页	936K
描述
Wideband, Low Power, Linear-in-dB Variable Gain Amplifier

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LMH6502 数据手册

June 2004

LMH6502

Wideband, Low Power, Linear-in-dB Variable Gain

Amplifier

General Description

Features

™

The LMH 6502 is a wideband DC coupled differential input

V_S

5V, T_A= 25˚C, R_F= 1kΩ, R_G= 174Ω, R_L= 100Ω, A_V

voltage controlled gain stage followed by a high-speed cur-

rent feedback Op Amp which can directly drive a low imped-

ance load. Gain adjustment range is more than 70dB for up

to 10MHz.

= A_V(MAX)= 10 Typical values unless specified.

n -3dB BW

n Gain control BW

130MHz

100MHz

70dB

0.6dB

1800V/µs

27mA

n Adjustment range (typical over temp)

n Gain matching (limit)

n Slew rate

n Supply current (no load)

n Linear output current

n Output voltage (R_L= 100Ω)

n Input voltage noise

n Input current noise

n THD (20MHz, R_L= 100Ω, V_O= 2V_PP

n Replacement for CLC520

Maximum gain is set by external components and the gain

can be reduced all the way to cut-off. Power consumption is

300mW with a speed of 130MHz. Output referred DC offset

voltage is less than 350mV over the entire gain control

voltage range. Device-to-device Gain matching is within

0.6dB at maximum gain. Furthermore, gain at any V_Gis

tested and the tolerance is guaranteed. The output current

feedback Op Amp allows high frequency large signals (Slew

Rate = 1800V/µs) and can also drive heavy load current

(75mA). Differential inputs allow common mode rejection in

low level amplification or in applications where signals are

carried over relatively long wires. For single ended opera-

tion, the unused input can easily be tied to ground (or to a

virtual half-supply in single supply application). Inverting or

non-inverting gains could be obtained by choosing one input

polarity or the other.

75mA

3.2V

7.7nV/

2.4pA/

−53dBc

)

Applications

n Variable attenuator

n AGC

n Voltage controller filter

n Video imaging processing

To provide ease of use when working with a single supply,

V_Grange is set to be from 0V to +2V relative to pin 11

potential (ground pin). In single supply operation, this ground

pin is tied to a "virtual" half supply.

LMH6502 gain control is linear in dB for a large portion of the

total gain control range. This makes the device suitable for

AGC circuits among other applications. For linear gain con-

trol applications, see the LMH6503 datasheet. The

LMH6502 is available in the SOIC-14 and TSSOP-14 pack-

age.

Typical Application

Gain vs. V_Gfor Various Temperature

20067737

20067706

A_VMAX= 10V/V

™

LMH is a trademark of National Semiconductor Corporation.

DS200677

www.national.com

12 3 4 5 6 7...19

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与LMH6502相关器件

型号	品牌	获取价格	描述	数据表
LMH6502_15	TI	获取价格	LMH6502 Wideband, Low Power, Linear-in-dB Variable Gain Amplifier
LMH6502MA	NSC	获取价格	Wideband, Low Power, Linear-in-dB Variable Gain Amplifier
LMH6502MA	TI	获取价格	LMH6502 Wideband, Low Power, Linear-in-dB Variable Gain Amplifier
LMH6502MA/NOPB	TI	获取价格	LMH6502 Wideband, Low Power, Linear-in-dB Variable Gain Amplifier
LMH6502MAX	NSC	获取价格	Wideband, Low Power, Linear-in-dB Variable Gain Amplifier
LMH6502MAX/NOPB	NSC	获取价格	IC SPECIALTY ANALOG CIRCUIT, PDSO14, SOIC-14, Analog IC:Other
LMH6502MAX/NOPB	TI	获取价格	LMH6502 Wideband, Low Power, Linear-in-dB Variable Gain Amplifier
LMH6502MT	NSC	获取价格	Wideband, Low Power, Linear-in-dB Variable Gain Amplifier
LMH6502MT/NOPB	NSC	获取价格	IC SPECIALTY ANALOG CIRCUIT, PDSO14, TSSOP-14, Analog IC:Other
LMH6502MT/NOPB	TI	获取价格	LMH6502 Wideband, Low Power, Linear-in-dB Variable Gain Amplifier

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