Overview
The LMH6521SQE/NOPB, produced by Texas Instruments, is a high-performance dual digitally controlled variable gain amplifier (DVGA). This component is designed for use in narrowband and wideband intermediate frequency sampling applications. It features two independent channels, each with a digitally controlled attenuator followed by a high linearity, differential output amplifier. The LMH6521 is optimized for low distortion and maximum system design flexibility, making it ideal for driving analog-to-digital converters and other applications requiring high linearity.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | WQFN (RTV) - 32 pins | |
| Operating Temperature Range | -40 to 85 | °C |
| OIP3 at 200 MHz | 48.5 | dBm |
| Maximum Voltage Gain | 26 | dB |
| Gain Range | 31.5 dB with 0.5-dB step size | |
| Channel Gain Matching | ±0.04 dB | |
| Noise Figure at Maximum Gain | 7.3 | dB |
| -3-dB Bandwidth | 1200 | MHz |
| Supply Voltage | 4.75 to 5.25 | V |
| Supply Current (Both Channels Enabled) | 100 to 200 | mA |
Key Features
- High-performance dual digitally controlled variable gain amplifiers (DVGA)
- Precise 0.5-dB gain steps over a 31.5-dB range
- Three gain control modes: Parallel Interface, Serial Interface (SPI), and Pulse Mode Interface
- Independent channel power down for energy efficiency
- Differential output amplifier allowing 10-VPPD signal swings on a single 5-V supply
- Low impedance output for driving filters or analog-to-digital converters
- Thermally-enhanced, 32-pin WQFN package
- Temperature range: -40°C to +85°C
Applications
- Cellular Base Stations
- Wideband and Narrowband IF Sampling Receivers
- Wideband Direct Conversion
- Digital Pre-Distortion
- ADC Drivers
Q & A
- What is the LMH6521SQE/NOPB used for?
The LMH6521SQE/NOPB is used in narrowband and wideband intermediate frequency sampling applications, such as cellular base stations, IF sampling receivers, and ADC drivers.
- What is the gain range of the LMH6521SQE/NOPB?
The gain range is 31.5 dB with 0.5-dB step size.
- What are the gain control modes available for the LMH6521SQE/NOPB?
The gain control modes include Parallel Interface, Serial Interface (SPI), and Pulse Mode Interface.
- What is the maximum voltage gain of the LMH6521SQE/NOPB?
The maximum voltage gain is 26 dB.
- What is the noise figure at maximum gain for the LMH6521SQE/NOPB?
The noise figure at maximum gain is 7.3 dB.
- What is the -3-dB bandwidth of the LMH6521SQE/NOPB?
The -3-dB bandwidth is 1200 MHz.
- Does the LMH6521SQE/NOPB support independent channel power down?
Yes, it supports independent channel power down for energy efficiency.
- What is the operating temperature range of the LMH6521SQE/NOPB?
The operating temperature range is -40°C to +85°C.
- What type of package does the LMH6521SQE/NOPB come in?
The LMH6521SQE/NOPB comes in a thermally-enhanced, 32-pin WQFN package.
- Can the LMH6521SQE/NOPB drive analog-to-digital converters?
Yes, it is designed to drive analog-to-digital converters with its high linearity and differential output.
