Overview
The LMH6401IRMZR is a wideband, digitally-controlled, variable-gain amplifier (DVGA) produced by Texas Instruments. It is designed for dc to radio frequency (RF), intermediate frequency (IF), and high-speed time-domain applications. The device is particularly suited as an analog-to-digital converter (ADC) driver for both dc- and ac-coupled applications that require automatic gain control (AGC). The LMH6401 optimizes noise and distortion performance to drive ultra-wideband ADCs effectively.
Key Specifications
| Parameter | Value |
|---|---|
| Package | UQFN-HR (RMZ), 16 pins |
| Operating Temperature Range (°C) | -40 to 85 |
| 3-dB Bandwidth at 26-dB Gain | 4.5 GHz |
| Gain Range | -6 dB to 26 dB in 1-dB steps |
| Differential Input Impedance | 100 Ω |
| Output IP3 | 43 dBm at 200 MHz, 33 dBm at 1 GHz, 27 dBm at 2 GHz |
| Output IP2 | 67 dBm at 200 MHz, 60 dBm at 1 GHz, 52 dBm at 2 GHz |
| Noise Figure at 1 GHz | 8 dB |
| Rise, Fall Time Pulse Response | 82 ps |
| Supply Operation | 5.0 V at 69 mA |
| Supply Voltage Range | Single-supply: 4 V to 5.25 V, Split-supply: ±2 V to ±2.625 V |
Key Features
- Differential input and output with common-mode control
- Gain control via SPI interface with a 32-dB gain range in 1-dB steps
- Supports single- and split-supply operation for DC- and AC-coupled applications
- Low power consumption of 345 mW
- Fabricated on an advanced complementary BiCMOS process
- Common-mode reference input pin to align amplifier output with ADC input requirements
- Power-down feature available through external PD pin or SPI control
Applications
- Analog-to-digital converter (ADC) drivers for dc- or ac-coupled applications
- Radio frequency (RF) and intermediate frequency (IF) applications
- High-speed time-domain applications
- Automatic gain control (AGC) in various communication and measurement systems
Q & A
- What is the LMH6401IRMZR used for?
The LMH6401IRMZR is a wideband, digitally-controlled, variable-gain amplifier used as an ADC driver for dc- or ac-coupled applications and in RF, IF, and high-speed time-domain applications.
- What is the gain range of the LMH6401IRMZR?
The gain range is from -6 dB to 26 dB in 1-dB steps.
- What is the 3-dB bandwidth of the LMH6401IRMZR at maximum gain?
The 3-dB bandwidth is 4.5 GHz at 26-dB gain.
- What is the noise figure of the LMH6401IRMZR at 1 GHz?
The noise figure is 8 dB at 1 GHz.
- What type of supply operation does the LMH6401IRMZR support?
The device supports both single-supply and split-supply operation.
- How is the gain controlled in the LMH6401IRMZR?
Gain control is performed via an SPI interface.
- What is the power consumption of the LMH6401IRMZR?
The power consumption is 345 mW.
- What is the operating temperature range of the LMH6401IRMZR?
The operating temperature range is -40°C to 85°C.
- Does the LMH6401IRMZR have a power-down feature?
Yes, it has a power-down feature available through the external PD pin or SPI control.
- What package type and size does the LMH6401IRMZR come in?
The device comes in a 3-mm × 3-mm UQFN-16 package.
