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See Technical Specifications

LMH6514SQE/NOPB

Variable Gain Amplifier 1 Circuit Differential 16-WQFN (4x4)

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

LMH6514SQE/NOPB
Datasheet:

LMH6514SQE/NOPB Datasheet (PDF)
PGA/VGA:

VGA
Number of channels:

1
BW at Acl (MHz):

600
Vs (max) (V):

5.25
EDA/CAD Models:

Request Free CAD Models for LMH6514SQE/NOPB

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LMH6514SQE/NOPB General Description

The LMH6514 is a high performance, digitally controlled variable gain amplifier (DVGA). It combines precision gain control with a low noise, ultra-linear, differential amplifier. Typically, the LMH6514 drives a high performance ADC in a broad range of mixed signal and digital communication applications such as mobile radio and cellular base stations where automatic gain control (AGC) is required to increase system dynamic range. When used in conjunction with a high speed ADC, system dynamic range can be extended by up to 42 dB.

The LMH6514 has a differential input and output allowing large signal swings on a single 5V supply. It is designed to accept signals from RF elements and maintain a terminated impedance environment. The input impedance is 200Ω resistive. The output impedance is either 200Ω or 400Ω and is user selectable. A unique internal architecture allows use with both single ended and differential input signals.

Input signals to the LMH6514 are scaled by a highly linear, digitally controlled attenuator with seven accurate 6 dB steps. The attenuator output provides the input signal for a high gain, ultra linear differential transconductor. The transconductor differential output current can be converted into a voltage by using the on-chip 200Ω or 400Ω loads. The transconductance gain is 0.1 Amp/Volt resulting in a maximum voltage gain of +32 dB when driving a 200Ω load, or 38 dB when driving the 400Ω load.

The LMH6514 operates over the industrial temperature range of −40°C to +85°C. The LMH6514 is available in a 16-Pin, thermally enhanced, WQFN package.

Key Features

Adjustable Gain with a 42 dB Range
Precise 6.02 dB Gain Steps
Parallel 3 Bit Gain Control
On Chip Register Gain Setting
Fully Differential Signal Path
Single Ended to Differential Capable
200Ω Input Impedance
Small Footprint (4 mm x 4 mm) WQFN Package

Key Specifications

600 MHz bandwidth at 100Ω load
39 dBm OIP3 at 75 MHz, 200Ω load
26 dB to 38 dB maximum gain
Selectable output impedance of 200Ω or 400Ω.
8.3 dB noise figure
5 ns gain step switching time
100 mA supply current

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Specifications

PGA/VGA	VGA	Number of channels	1
BW at Acl (MHz)	600	Vs (max) (V)	5.25
Vs (min) (V)	4	Acl, min spec gain (V/V)	0.25
Gain (max) (dB)	30	Architecture	Fully Differential ADC Driver
Slew rate (typ) (V/µs)	1600	Operating temperature range (°C)	-40 to 85
Features	Digital Gain Set, Single-ended to Differential conversion	Rating	Catalog
Pin Count	17	Released Date	Apr 13, 2015
Last Modified Date	Mar 7, 2023 4:10 PM UTC