The LMH6515 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 LMH6515 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 32 dB.

The LMH6515 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 200? resistive. The output impedance is either 200? or 400? and is user selectable. A unique internal architecture allows use with both single ended and differential input signals.

Input signals to the LMH6515 are scaled by a highly linear, digitally controlled attenuator with 31 accurate 1 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 200? or 400? loads. The transconductance gain is 0.1 Amp/Volt resulting in a maximum voltage gain of +26 dB when driving a 200? load, or 32 dB when driving the 400? load. On chip digital latches are provided for local storage of the gain setting. The gain step settling time is 5 ns and care has been taken to reduce the sensitivity of bandwidth and phase to gain setting.

The LMH6515 operates over the industrial temperature range of −40°C to +85°C. The LMH6515 is available in a 16-Pin, thermally enhanced, WQFN package.

• Adjustable Gain with a 31 dB Range
• Precise 1 dB Gain Steps
• Parallel 5-bit Gain Control
• On Chip Register Stores Gain Setting
• Fully Differential Signal Path
• Single Ended to Differential Capable
• 200? Input Impedance
• Small Footprint (4 mm x 4 mm) WQFN Package

Key Specifications

• 600 MHz bandwidth @ 100? load
• 40 dBm OIP3 @ 75 MHz, 200? load
• 20 dB to 30 dB maximum gain
• Selectable output impedance of 200? or 400?
• 8.3 dB noise figure
• 5 ns gain step switching time
• 100 mA supply current

All trademarks are the property of their respective owners.

• PGA/VGA
• VGA
• Number of channels (#)
• 1
• BW @ Acl (MHz)
• 600
• Vs (Max) (V)
• 5.25
• Vs (Min) (V)
• 4
• Acl, min spec gain (V/V)
• 0.45
• Gain (Max) (dB)
• 24.2
• Architecture
• Fully Differential ADC Driver
• Operating temperature range (C)
• -40 to 85
• Features
• Digital Gain Set, Single-ended to Differential conversion

LMH6515的完整型号有：LMH6515SQ/NOPB，以下是这些产品的关键参数及官网采购报价：

LMH6515SQ/NOPB，工作温度：-40 to 85，封装：WQFN (RGH)-16，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：SN，TI官网LMH6515SQ/NOPB的批量USD价格：4.224（1000+）

LMH6515EVAL — LMH6515 数字控制、可变增益放大器评估板

The LMH6515 is a 600 MHz, Digital Controlled, Variable Gain Amplifier from the PowerWise® Family. The LMH6515EL evaluation board is designed to aid in the characterization of TI`s High Speed LMH6515 Digital Controlled Variable Gain Amplifier. Use the evaluation board as a guide for high (...)

PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice

PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用，包括业内超大的模型库之一，涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助?PSpice for TI 的设计和仿真环境及其内置的模型库，您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案，然后再进行布局和制造，可缩短产品上市时间并降低开发成本。

在?PSpice for TI 设计和仿真工具中，您可以搜索 TI (...)

TINA-TI — 基于 SPICE 的模拟仿真程序

TINA-TI 提供了 SPICE 所有的传统直流、瞬态和频域分析以及更多。TINA 具有广泛的后处理功能，允许您按照希望的方式设置结果的格式。虚拟仪器允许您选择输入波形、探针电路节点电压和波形。TINA 的原理图捕获非常直观 - 真正的“快速入门”。

TINA-TI 安装需要大约 500MB。直接安装，如果想卸载也很容易。我们相信您肯定会爱不释手。

TINA 是德州仪器 (TI) 专有的 DesignSoft 产品。该免费版本具有完整的功能，但不支持完整版 TINA 所提供的某些其他功能。

如需获取可用 TINA-TI 模型的完整列表，请参阅：SpiceRack - 完整列表

需要 HSpice (...)