SX1230I066TRT View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

SX1230I066TRT

Integrated Transmitter IC Narrow/wideband 315 MHz, 434 MHz 868 MHz and 915 MHz band Transmitter

Semtech Corporation 

ADVANCED COMMUNICATIONS & SENSING

SX1230

Integrated Transmitter IC

DATASHEET

This product datasheet contains a detailed description of the SX1230 performance and functionality. Please consult the

Semtech website for the latest updates or errata (www.semtech.com).

1. General Description

The SX1230 is a multi-band, single chip transmitter IC capable of (G)FSK, (G)MSK, and OOK modulation of an input data

stream. It can transmit this modulated signal in any of the license free ISM bands from 290 MHz to 1020 MHz.

1.1. Simplified Block Diagram

VBAT

VR_DIG

VR_ANA

RESET

TEST

VR_PA

RFOUT

GND

PLL_LOCK

Power Distribution

PA1

Ramp and

Control

PA2

÷R

Div 2/4/6

Fractional-N

PLL

XTAL

Interpolation

and Filtering

RC Oscillator

Modulator

Calibration

Switch I/P

Registers

and SPI

Interface

E2_MODE

DATA

DCLK

NSS

MISO

MOSI

SCK

CLKOUT

XTA

XTB

PB(3:0)

Figure 1. SX1230 Simplified Block Diagram

The general architecture of the SX1230 is shown in Figure 1. The frequency synthesizer generating the LO frequency is a

third-order fractional-N sigma-delta PLL. The PLL is capable of fast auto-calibration and offers fast switching and settling

times. For frequency modulation ((G)FSK and (G)MSK), the modulation is performed within the PLL bandwidth. Optional

pre-filtering of the bit stream may also be enabled to reduce the power delivered to adjacent channels.

Amplitude modulation (OOK), is performed via a DAC driving the reference of the regulator of the PA. Note that pre-filtering

of the bit stream is also available in this mode. The VCO works at 2, 4 or 6 times the RF output frequency to improve the

quadrature precision and reduce pulling effects during transmission.

The PA of the SX1230 is comprised of two amplifiers - one high power, one low power. This enables the SX1230 to deliver

a wide range, over 30 dB, of output powers - up to +13 dBm in single PA configuration. However, with an appropriate output

impedance transformation, in dual PA mode, this can be increased to +17 dBm.

SX1230, Revision 2 May 2009

©2008 Semtech Corp.

Page 4

www.semtech.com

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