Transceiver

LT8900 PDF Datasheet – Low Cost 2.4GHz Radio Transceiver

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This post describes for the Transceiver.

The Part Number is LT8900.

The function of this semiconductor is Low Cost 2.4GHz Radio Transceiver.

The manufacturer of this part is ETC.

See the preview image and the PDF file for more information.

LT8900 Radio Transceiver

Description

The LT8900 is a low-cost, fully integrated CMOS RF transceiver, GFSK data modem, and packet framer, optimized for use in the 2.4 GHz ISM band. It contains transmit, receive, RF synthesizer, and digital modem functions, with few external components. The transmitter supports digital power control. The receiver utilizes extensive digital processing for excellent overall performance, even in the presence of interference and transmitter impairments.

On-chip transmit and receive FIFO registers are available to buffer the data transfer with MCU. Over-the-air data rate is always 1 Mbps even when connected to a slow, low-cost MCU. Built-in CRC, FEC, data whitening, and automatic retry/acknowledge are all available to simplify and optimize performance for individual applications. The digital baseband interface can be either 4-wire SPI or 2-wire I2C-bus. Three additional pins are available for optional reset and buffer control.

Pinout

LT8900SSK datasheet pdf pinout

 

Features

1. Complete 2.4 GHz radio transceiver includes fully integrated RF PLL and channel filtering

2. Supports Frequency-Hopping Spread Spectrum

3. Supports SPI and I2C bus interface

4. Built-in smart auto-acknowledge Tx/Rx protocol simplifies usage

[…]

Applications:

1. Remote controls

2. Wireless keyboards and mice

3. Proprietary Wireless Networks

4. Home automation

5. Commercial and industrial short-range wireless

LT8900 PDF Datasheet

RDA1846 PDF Datasheet – Transceiver for Walkie Talkie

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A transceiver for a walkie-talkie is a compact electronic device that combines both the functions of a transmitter and a receiver within a single unit. This allows users to communicate with each other using a two-way radio system. Walkie-talkie transceivers are commonly used for short-range wireless communication in various scenarios, including personal, professional, and recreational activities.

Part Number: RDA1846

Function: Single-chip Transceiver

Package: QFN 32 Pin Type

Manufacturer: RDA

Images:RDA1846 pinout datasheet

Description

The RDA1846 is a highly integrated single-chip transceiver for Walkie Talkie applications. It totally realizes the translation from RF carrier to voice in the RX path and from voice to RF carrier in the TX path, requiring only one micro controller. The RDA1846 has a powerful digital signal processor, which makes it have optimum voice quality, flexible function options, and robust performance under varying reception conditions.

The RDA1846 can be tuned to the worldwide frequency band for Walkie Talkie from 400MHz to 500MHz and especially from 134MHz to 174MHz which meets the frequency band of weather broadcast. The transceiver uses the CMOS process with a package size of 5X5mm. By virtue of its high integration, it requires the least external components and eliminates the complicated design of sensitive RF circuits on PCB.

Features

1. CMOS single-chip fully-integrated transceiver

2. Fully integrated frequency synthesizer and VCO

3. 12.5KHz, 25KHz channels

4. Digital auto frequency control (AFC)

5. Digital auto gain control (AGC)

6. Selectable pre/de-emphasis

7. Received signal strength indicator (RSSI)

8. DTMF and programmable in-band dual tone

9. Programmable in-band single tone transmitter

10. Auto RX/TX/SLEEP state switching

11. 3-wire/4-wire/I2C serial control bus interface

12. Analog and digital volume control

13 Directly support 32Ω resistance loading

14. 3.3 to 4.8 V supply voltage with Integrated LDO

Block Diagram:

RDA1846 transceiver

Applications:

1. Cellular handsets

2. Family radio services

3. Walkie Talkies

RDA1846 PDF Datasheet