Texas Instruments TRF7970A Manual page 2

TRF7970A
SLOS743L – AUGUST 2011 – REVISED MARCH 2017
The receiver system has a dual-input receiver architecture to maximize communication robustness. The
receivers also include various automatic and manual gain control options. The received signal strength
from transponders, ambient sources, or internal levels is available in the RSSI register.
A SPI or parallel interface can be used for the communication between the MCU and the TRF7970A
device. When the built-in hardware encoders and decoders are used, transmit and receive functions use a
127-byte FIFO register. For direct transmit or receive functions, the encoders or decoders can be
bypassed so the MCU can process the data in real time.
The TRF7970A device supports a wide supply voltage range of 2.7 V to 5.5 V and data communication
levels from 1.8 V to 5.5 V for the MCU I/O interface.
The transmitter has selectable output power levels of 100 mW (+20 dBm) or 200 mW (+23 dBm)
equivalent into a 50-Ω load when using a 5-V supply and supports OOK and ASK modulation with
selectable modulation depth.
The built-in programmable auxiliary voltage regulator delivers up to 20 mA to supply an MCU and
additional external circuits within the reader system.
Integrated RF field detector with programmable wake-up levels, eight selectable power modes, and ultra-
low power operation enable easy development of robust and cost-efficient designs for long battery life.
Start evaluating the TRF7970A multiprotocol transceiver IC with the TRF7970AEVM, TRF7970ATB, or
DLP-7970ABP.
PART NUMBER
TRF7970ARHB
2 Device Overview
Device Information
PACKAGE
VQFN (32)
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Product Folder Links: TRF7970A
BODY SIZE
5 mm × 5 mm
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