Overview
The LMH6521SQE, produced by Texas Instruments (formerly National Semiconductor), is a high-performance dual digitally controlled variable gain amplifier (DVGA). This device is designed for use in narrowband and wideband intermediate frequency sampling applications. Each channel of the LMH6521SQE features an independent, digitally controlled attenuator followed by a high linearity, differential output amplifier. These components are optimized for low distortion and maximum system design flexibility, making the LMH6521SQE ideal for driving analog-to-digital converters where high linearity is essential.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| 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) | 225 mA | |
| Operating Temperature Range | –40°C to +85°C | |
| Package Type | Thermally-Enhanced, 32-Pin WQFN |
Key Features
- OIP3 of 48.5 dBm at 200 MHz
- Maximum Voltage Gain of 26 dB
- Gain Range: 31.5 dB with 0.5-dB Step Size
- Channel Gain Matching of ±0.04 dB
- Noise Figure: 7.3 dB at Maximum Gain
- –3-dB Bandwidth of 1200 MHz
- Low Power Dissipation
- Independent Channel Power Down
- Three Gain Control Modes: Parallel Interface, Serial Interface (SPI), and Pulse Mode Interface
- Temperature Range: –40°C to +85°C
- Thermally-Enhanced, 32-Pin WQFN Package
Applications
- Cellular Base Stations
- Wideband and Narrowband IF Sampling Receivers
- Wideband Direct Conversion
- Digital Pre-Distortion
- ADC Drivers
Q & A
- What is the OIP3 of the LMH6521SQE at 200 MHz?
The OIP3 of the LMH6521SQE at 200 MHz is 48.5 dBm.
- What is the maximum voltage gain of the LMH6521SQE?
The maximum voltage gain of the LMH6521SQE is 26 dB.
- What is the gain range and step size of the LMH6521SQE?
The gain range is 31.5 dB with a 0.5-dB step size.
- How accurate is the channel gain matching of the LMH6521SQE?
The channel gain matching is ±0.04 dB.
- What is the noise figure at maximum gain for the LMH6521SQE?
The noise figure at maximum gain is 7.3 dB.
- What is the –3-dB bandwidth of the LMH6521SQE?
The –3-dB bandwidth is 1200 MHz.
- Does the LMH6521SQE support independent channel power down?
- What gain control modes are available for the LMH6521SQE?
The LMH6521SQE supports Parallel Interface, Serial Interface (SPI), and Pulse Mode Interface.
- What is the operating temperature range of the LMH6521SQE?
The operating temperature range is –40°C to +85°C.
- What type of package does the LMH6521SQE come in?
The LMH6521SQE comes in a thermally-enhanced, 32-Pin WQFN package.
