IDT F1358/DPD Demodulator for reduction of power consumption
The IDT F1358 is a highly linear complex IF digital pre-distortion (DPD) demodulator with built-in digital step attenuator (DSA) and single-pole-double-throw switches (SP2Ts).
IDT introduced a new RF device that greatly reduces power consumption, solution cost and board area for developers of TDD cellular base stations.
Operating from 3200 MHz to 4000 MHz, the F1358 integrated digital pre-distortion (DPD) demodulator delivers the industry’s highest levels of linearity and integration to enhance the performance of the digital pre-distortion transmitter linearization path of cellular base stations.
The IDT F1358 is a highly linear complex IF digital pre-distortion (DPD) demodulator with built-in digital step attenuator (DSA) and single-pole-double-throw switches (SP2Ts). It receives the signal coming out of the PA so that the I&Q data at Baseband can be pre-distorted before being sent to the Tx DAC to counteract the distortion inherent in the downstream PA. The signal coupled from the PA is adjusted via a DSA to a lower level and then sub-sampled at an IF frequency of ~200 MHz which necessitates the need for a highly linear demodulator to downmix to quadrature IF from the Transmit frequency. By sampling IF_I and IF_Q independently and then digitally combining these signals, an effective doubling of the sample rate can be achieved. Any distortion in this path will degrade the performance of the DPD algorithm.
By utilizing an ultra-linear demodulator with integrated DSA such as the IDT F1320/F1370, the ACLR and/or power consumption of the full Tx system can be improved significantly.
The F1358 digital pre-distortion demodulator is available now in a 6 x 6 mm 36-VFQFPN package.
With its integrated digital step attenuator (DSA) and single-pole-double-throw switch (SP2T), this latest addition to IDT’s growing RF portfolio joins two other popular high-performance demodulators—the F1320, operating at 400 MHz to 1200 MHz, and the F1370, operating at 1300 MHz to 2900 MHz. All of the DPD demodulators feature IDT’s patented Zero-Distortion™ and Glitch-Free™ technologies and are footprint compatible.
- Wide flat performance IF BW
- Wide RF and LO BWs (~ 800 MHz)
- Ideal for Multi-Carrier Systems
- Drives ADC directly
- Ultra linear +42 dBm IP3O
- Excellent ACLR performance
- 200 Ω output impedance
- Fully integrated DPD demodulator
- 6x6mm 36-pin package
- Standby Mode with Fast Recovery
- ICC: 230 mA
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