Overview
The LMV221SD/NOPB, produced by Texas Instruments, is a 40-dB RF power detector designed for use in various wireless communication systems, including CDMA and WCDMA applications. This device operates over a wide RF frequency range from 50 MHz to 3.5 GHz and provides an accurate temperature and supply-compensated output voltage that relates linearly to the RF input power in dBm. The LMV221 is powered by a single supply voltage ranging from 2.7 V to 3.3 V and features a low-power shutdown mode to conserve energy.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (VDD - GND) | 2.7 | 3.0 | 3.3 | V |
| Ambient Temperature | –40 | 85 | °C | |
| RF Frequency | 50 | 3500 | MHz | |
| RF Input Power | –45 | –5 | dBm | |
| Output Voltage Range | 0.3 | 2.0 | V | |
| Package Type | WSON (6-pin) | |||
| Package Size | 2.50 mm × 2.20 mm × 0.8 mm |
Key Features
- 40-dB linear in dB power detection range from –45 dBm to –5 dBm
- Multi-band operation from 50 MHz to 3.5 GHz
- 0.5-dB accurate temperature compensation
- External configurable output filter bandwidth
- Shutdown mode for low power consumption
- High-impedance output during shutdown to prevent discharge of external filter capacitance
Applications
- UMTS/CDMA/WCDMA RF power control
- GSM/GPRS RF power control
- PA (Power Amplifier) modules
- IEEE 802.11b, g (WLAN) applications
Q & A
- What is the operating frequency range of the LMV221?
The LMV221 operates over a frequency range from 50 MHz to 3.5 GHz.
- What is the supply voltage range for the LMV221?
The supply voltage range is from 2.7 V to 3.3 V.
- What is the RF input power detection range of the LMV221?
The RF input power detection range is from –45 dBm to –5 dBm.
- Does the LMV221 have a shutdown mode?
- How is the output voltage of the LMV221 configured?
The output voltage is ground-referenced and linear in dB, with an output voltage range from 0.3 V to 2 V.
- What is the package type and size of the LMV221?
The LMV221 comes in a 6-pin WSON package with dimensions of 2.50 mm × 2.20 mm × 0.8 mm.
- What are some common applications of the LMV221?
Common applications include UMTS/CDMA/WCDMA RF power control, GSM/GPRS RF power control, PA modules, and IEEE 802.11b, g (WLAN) applications.
- How does the LMV221 handle temperature compensation?
The device features 0.5-dB accurate temperature compensation.
- Can the output filter bandwidth of the LMV221 be configured externally?
- What is the thermal resistance of the LMV221 in the WSON package?
The junction-to-ambient thermal resistance (RθJA) is 100.4 °C/W.
