Dual-Stage, Low-Noise Amplifier Solution Includes Gain-Step Control
The MAX2670 GPS/GNSS front-end amplifier IC is designed for automotive and marine GPS/GNSS satellite navigation antenna modules or for any application that needs to compensate for cable losses from the antenna to receiver. Two unconditionally stable low-noise amplifier stages provide the high gain and integrated I/O matching to minimize the need for external matching components and eliminate the need for additional gain stages. The device features the option to place a bandpass ceramic or SAW filter between the two amplifier stages to provide a narrow-band output to further improve the noise performance of the GPS/GNSS receiver. Additionally, a 3.4dB gain step is provided to compensate for cable loss variation between different applications. The device is designed to operate across all GNSS frequency standards with a 34.8dB typical cascaded gain and a 25mA supply current. The two LNA stages allow the use of a wide range of GNSS filter types for maximum flexibility in system design. The final RF output pin, which drives the cable to the GNSS receiver, is also the power-supply connection that accepts a DC supply in the +3.0V to +5.5V range. Alternatively, the DC supply can be applied to pin 4. This GPS/GNSS front-end amplifier is designed on a low-noise, advanced SiGe process and is available in a lead-free, 10-pin TDFN surface-mount package (3mm x 3mm).
Key Features
| Applications/Uses
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| title | Download file |
|---|---|
| MAX2670 Data Sheet | MAX2670.pdf |
| Part Number | RF Freq. (MHz) | RF Freq. (MHz) | Noise Figure (dB) | Gain (dB) | Input IP3 (dBm) | ISUPPLY (mA) | Footprint (mm x mm) | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|
| min | max | See Notes | |||||||
| MAX2670 | 1575 | 1575 | 1 | 34.8 | -12 | 25 | 3.0 x 3.0 | TDFN-EP/10 | $2.45 @1k |
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
|---|---|---|---|---|---|
| MAX2670GTB+ | Active | TDFN-EP,;10 pin;9.6 mm² | -40°C to +105°C | Lead Free | |
| MAX2670GTB+T | Active | TDFN-EP,;10 pin;9.6 mm² | -40°C to +105°C | Lead Free | |
| MAX2670GTB+TW | Active | TDFN; | -40°C to +105°C | See data sheet | |
| MAX2670GTB/V+ | Active | TDFN-EP,;10 pin;9.6 mm² | -40°C to +105°C | Lead Free | |
| MAX2670GTB/V+T | Active | TDFN-EP,;10 pin;9.6 mm² | -40°C to +105°C | Lead Free |
