The MAX2370 is a Maxim company-designed 450MHz integrated quadrature transmitter. The device takes a differential I/Q baseband input and converts it up to intermediate frequency (IF) through a quadrature modulator and IF variable-gain amplifier (VGA). The signal is then routed to an external IF filter and upconverted to RF through an image-reject mixer and RF VGA. The signal is further amplified with an on-chip power amplifier (PA) driver. An IF synthesizer, an RF synthesizer, a local oscillator buffer, and an SPI™/QSPI™/MICROWIRE™-compatible, 3-wire programmable bus complete the basic functional blocks of this IC. The MAX2370 is available in a 48-pin TQFN package with exposed paddle and is specified for the extended temperature range (-40°C to +85°C).
The MAX2370 is a 48‑pin TQFN integrated quadrature transmitter designed for 450 MHz applications. It accepts differential I/Q baseband inputs, up‑converts them to an intermediate frequency, and then to RF using a single‑sideband mixer and RF VGA before a on‑chip power amplifier.
The device includes dual synthesizers for RF and IF local oscillators, a 3‑wire SPI/QSPI/MICROWIRE compatible serial interface, and programmable registers. Electrical specifications, absolute maximum ratings, and detailed pin descriptions are provided for system designers.
| Operating Frequency | 450 MHz |
|---|---|
| Maximum Output Power | +8 dBm |
| Supply Voltage Range | 2.7 V to 3.3 V |
| Operating Temperature Range | -40 °C to +85 °C |
| Power‑Control Range | 100 dB |
| Gain‑Control Range | >70 dB |
| Package | 48‑pin TQFN |
The device operates from 2.7 V to 3.3 V supply voltage.
The maximum RF output power is +8 dBm.
It is specified for operation from –40 °C to +85 °C.
The MAX2370 is available in a 48‑pin thin QFN package.