Low Current LNAs with Bypass
Low Power Consumption Amplifiers with Bypass and Great Noise Performance
About low-current LNAs with bypass: battery-friendly LNAs with an integrated bypass path for additional dynamic-range extension — the amplifier can be electrically removed when input levels would otherwise compress it. Read more »Read less «
A low-current LNA with bypass combines minimum-supply-current LNA design with a switchable bypass path. The result is a single component that gives a battery-powered or thermally-constrained radio two operating modes: amplification when the signal is weak (with the noise figure that drives system sensitivity), and a low-loss bypass when the signal is strong enough that amplification would compress and generate intermod. Adding bypass to a low-current part is the right move when input levels span a wide range — portable cellular, GNSS in mixed environments, ISM-band radios in industrial sites.
Selection criteria match a standard low-current LNA (supply current, NF, gain, IIP3), with the addition of bypass insertion loss and switching speed. The bypass control is typically a single CMOS-level digital pin that can be driven from the host MCU's GPIO.
Typical applications include portable cellular handsets and IoT devices, wearable GNSS receivers, dual-mode (high/low-power) sensor radios, and any receiver that has to coexist with a co-located transmitter. AEC-Q100 grade-2 qualified variants are denoted with a "-W" suffix.
The table below lists the active low-current-LNA-with-bypass portfolio sorted by SKU. Click any SKU for the full data sheet, S-parameters, and reference designs.
| Product | Description | Min Freq (GHz) | Max Freq (GHz) | Parametric Charts | Reference Conditions | Gain(dB) | NF(dB) | OP1dB (dBm) | OIP3 (dBm) | Vdd Range (V) | Idd Range (mA) | Features | Package (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GRF2042 | Linear Gain Block with Bypass |
0.15 | 6.0 | 5V/80mA/1700MHz |
15.5 | 2.1 | 22.0 | 38.0 | 2.7-6.0 | 20-100 | Flat gain; low noise; high linearity; internally matched; bypass |
1.5 DFN-6 | |
| GRF2043 | Linear Gain Block with Bypass |
0.15 | 6.0 | 5V/80mA/1.9GHz |
18.5 | 1.8 | 22.0 | 36.0 | 2.7-6.0 | 20-100 | Bypass; low noise; high linearity; internally matched; flex bias |
1.5 DFN-6 | |
| GRF2140 | Low Current LNA with Bypass |
0.085 | 4.2 | 3.3V/18mA/1950MHz |
17.8 | 1.1 | 9.3 | 20 | 2.7-5.0 | 6-30 | High gain, low noise; bypass |
1.5 DFN-6 | |
| GRF2243 | Low Noise Amplifier with Bypass |
0.4 | 5.0 | 3.3V/15mA/2.5GHz |
19.7 | 0.75 | 14.0 | 23.0 | 2.7-5.0 | 8-25 | High gain; low noise; bypass |
1.5 DFN-6 | |
| GRF2374 | Low Current LNA with Bypass |
0.1 | 3.8 | 3.3V/15mA/2.4GHz |
14.3 | 1.4 | 11.0 | 23.5 | 2.7-5.5 | 10-25 | High gain, low noise; bypass |
1.5 DFN-6 | |
| GRF2541 | 5 GHz LNA with bypass |
4.9 | 6.0 | 3.3V/18mA/5.5GHz |
16.4 | 1 | 7.0 | 19.0 | 2.7-5.0 | 12-28 | Internal match; high gain, low noise; bypass |
1.5 DFN-6 | |
| GRF2543 | High Gain, Ultra-LNA with Bypass |
3.75 | 8.5 | 3.3V/15mA/5.5GHz |
14.5 | 1.0 | 11.5 | 2.7-5.0 | 15 | Low noise; bypass |
1.5 DFN-6 |
* = Product is in Pre-Production. Contact [email protected] for minimum order quantity.