Overview
The LMH6401IRMZT, produced by Texas Instruments, is a wideband, digitally-controlled, variable-gain amplifier (DVGA) designed for applications spanning from DC to radio frequency (RF), intermediate frequency (IF), and high-speed time-domain. This 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 LMH6401IRMZT is fabricated on an advanced complementary BiCMOS process, ensuring optimized noise and distortion performance to drive ultra-wideband ADCs.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | UQFN-16 (RMZ) |
| Number of Pins | 16 |
| Operating Temperature Range | -40°C to 85°C |
| 3-dB Bandwidth | 4.5 GHz at 26-dB Gain |
| Gain Range | -6 dB to 26 dB in 1-dB Steps |
| Differential Input Impedance | 100 Ω |
| Supply Voltage | 4 V to 5.5 V |
| Supply Current | 69 mA at 5 V |
| Slew Rate (Typ) | 17,400 V/μs |
| Noise Figure at 1 GHz | 8 dB |
| Harmonic Distortion at 1 GHz | -63 dBc |
| Output IP3 at 1 GHz | 33 dBm |
| Output IP2 at 1 GHz | 60 dBm |
| Rise and Fall Time Pulse Response | 82 ps |
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 driving ADCs
- Common-mode reference input pin to align amplifier output with ADC input requirements
- Low power consumption of 345 mW
- High slew rate of 17,400 V/μs
- RoHS compliant and lead-free
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
- Flexible 3.2-GSPS multi-channel AFE reference designs for DSOs, radar, and 5G wireless test systems
Q & A
- What is the LMH6401IRMZT used for?
The LMH6401IRMZT is used as a wideband, digitally-controlled, variable-gain amplifier (DVGA) for applications such as ADC drivers, RF, IF, and high-speed time-domain applications.
- What is the gain range of the LMH6401IRMZT?
The gain range is from -6 dB to 26 dB in 1-dB steps.
- What is the 3-dB bandwidth of the LMH6401IRMZT?
The 3-dB bandwidth is 4.5 GHz at 26-dB gain.
- What is the operating temperature range of the LMH6401IRMZT?
The operating temperature range is -40°C to 85°C.
- How is the gain controlled in the LMH6401IRMZT?
The gain is controlled via an SPI interface.
- What is the typical slew rate of the LMH6401IRMZT?
The typical slew rate is 17,400 V/μs.
- Is the LMH6401IRMZT RoHS compliant?
Yes, the LMH6401IRMZT is RoHS compliant and lead-free.
- What is the noise figure of the LMH6401IRMZT at 1 GHz?
The noise figure at 1 GHz is 8 dB.
- What is the harmonic distortion of the LMH6401IRMZT at 1 GHz?
The harmonic distortion at 1 GHz is -63 dBc.
- What is the output IP3 of the LMH6401IRMZT at 1 GHz?
The output IP3 at 1 GHz is 33 dBm.
