lmh6502mtx National Semiconductor Corporation, lmh6502mtx Datasheet

no-image

lmh6502mtx

Manufacturer Part Number
lmh6502mtx
Description
Wideband, Low Power, Linear-in-db Variable Gain Amplifier
Manufacturer
National Semiconductor Corporation
Datasheet
© 2004 National Semiconductor Corporation
LMH6502
Wideband, Low Power, Linear-in-dB Variable Gain
Amplifier
General Description
The LMH
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.
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
±
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.
To provide ease of use when working with a single supply,
V
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.
LMH
G
0.6dB at maximum gain. Furthermore, gain at any V
range is set to be from 0V to +2V relative to pin 11
is a trademark of National Semiconductor Corporation.
Gain vs. V
6502 is a wideband DC coupled differential input
G
for Various Temperature
DS200677
20067706
G
is
Features
V
= A
n -3dB BW
n Gain control BW
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
n Input voltage noise
n Input current noise
n THD (20MHz, R
n Replacement for CLC520
Applications
n Variable attenuator
n AGC
n Voltage controller filter
n Video imaging processing
Typical Application
S
=
V(MAX)
±
5V, T
= 10 Typical values unless specified.
A
= 25˚C, R
L
L
= 100Ω, V
A
= 100Ω)
VMAX
F
= 1kΩ, R
= 10V/V
O
= 2V
G
= 174Ω, R
PP
)
20067737
www.national.com
L
7.7nV/
2.4pA/
= 100Ω, A
June 2004
1800V/µs
130MHz
100MHz
−53dBc
±
±
±
0.6dB
27mA
75mA
70dB
3.2V
V

Related parts for lmh6502mtx

lmh6502mtx Summary of contents

Page 1

... 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. Gain vs. V for Various Temperature G LMH is a trademark of National Semiconductor Corporation. ™ © 2004 National Semiconductor Corporation Features ± 5V 25˚ ...

Page 2

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 4): Human Body Machine Model Input Current V Differential IN Output Current + − Supply Voltages ...

Page 3

Electrical Characteristics Unless otherwise specified, all limits guaranteed for T ± 0.1V 100Ω +2V. Boldface limits apply at the temperature extremes. IN_DIFF L G Symbol Parameter DC & Miscellaneous Performance GACCU Gain Accuracy (See ...

Page 4

... Connection Diagram Ordering Information Package Part Number 14-pin SOIC LMH6502MA LMH6502MAX LMH6502MT 14-Pin TSSOP LMH6502MTX www.national.com (Note 2) (Continued) ] with 0.1V differential input voltage. − ], −PSRR definition: [|∆V /∆ with 0.1V differential input voltage. OUT < ...

Page 5

Typical Performance Characteristics 1kΩ 174Ω, both inputs terminated in 50Ω Small Signal Frequency for Various V Frequency Response Over Temperature (A Frequency Response for Various V ± ( 2.5V) ...

Page 6

Typical Performance Characteristics = 0V 1kΩ 174Ω, both inputs terminated in 50Ω output. (Continued) Large Signal Frequency Response for Various A Frequency Response for Various V (Large Signal ...

Page 7

Typical Performance Characteristics = 0V 1kΩ 174Ω, both inputs terminated in 50Ω output. (Continued) A vs. V VMAX CM ± PSRR 5V ± CMRR 5V Unless otherwise specified 100Ω, Typical values, ...

Page 8

Typical Performance Characteristics = 0V 1kΩ 174Ω, both inputs terminated in 50Ω output. (Continued) A vs. Supply Voltage VMAX Supply Current vs. V Output Offset Voltage vs www.national.com Unless otherwise specified: ...

Page 9

Typical Performance Characteristics = 0V 1kΩ 174Ω, both inputs terminated in 50Ω output. (Continued) Feed through Isolation Gain Flatness Frequency vs. Gain (Note 14) K Factor vs Unless otherwise specified: V ...

Page 10

Typical Performance Characteristics = 0V 1kΩ 174Ω, both inputs terminated in 50Ω output. (Continued ± Gain vs Output Offset Voltage vs www.national.com Unless otherwise ...

Page 11

Typical Performance Characteristics = 0V 1kΩ 174Ω, both inputs terminated in 50Ω output. (Continued) ± Output Offset Voltage vs (Typical Unit # 1) ± Output Offset Voltage vs (Typical ...

Page 12

Typical Performance Characteristics = 0V 1kΩ 174Ω, both inputs terminated in 50Ω output. (Continued) −1dB Compression HD2 & HD3 vs. P THD vs. P OUT www.national.com Unless otherwise specified 100Ω, Typical ...

Page 13

Typical Performance Characteristics = 0V 1kΩ 174Ω, both inputs terminated in 50Ω output. (Continued) THD vs Bias Current vs Step Response Plot Unless otherwise specified 100Ω, ...

Page 14

Typical Performance Characteristics = 0V 1kΩ 174Ω, both inputs terminated in 50Ω output. (Continued) Application Information THEORY OF OPERATION A simplified schematic is shown in Figure 1. +V are buffered with closed loop ...

Page 15

Application Information V = 0V, the input referred V term shows small IN OS square wave riding a DC value. Adjust R square wave term to zero. After adjusting the input-referred offset, adjust R (with V = ...

Page 16

Application Information National Semiconductor suggests the following evaluation boards as a guide for high frequency layout and as an aid in device testing and characterization: Device Package LMH6502MA SOIC-14 LMH6502MT TSSOP-14 The evaluation board is shipped when a device sample ...

Page 17

Application Circuits (Continued) FIGURE 6. Automatic Gain Control (AGC) Loop FREQUENCY SHAPING Frequency Shaping Frequency shaping and bandwidth extension of the LMH6502 can be accomplished using parallel networks connected across the R ports. The network shown in the Figure 7 ...

Page 18

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 14-Pin SOIC NS Package Number M14A 14-Pin TSSOP NS Package Number MTC14 18 ...

Page 19

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

Related keywords