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| (R) TX6004 914.00 MHz Hybrid Transmitter * * * * * Designed for Short-Range Wireless Data Communications Supports RF Data Transmission Rates Up to 115.2 kbps 3 V, Low Current Operation plus Sleep Mode Stable, Easy to Use, Low External Parts Count Complies with Directive 2002/95/EC (RoHS) The TX6004 hybrid transmitter is ideal for short-range wireless data applications where robust operation, small size, low power consumption and low cost are required. All critical RF functions are contained in the hybrid, simplifying and speeding design- in. The TX6004 includes provisions for both on-off keyed (OOK) and amplitude-shift keyed (ASK) modulation. The TX6004 employs SAW filtering to suppress output harmonics, facilitating compliance with FCC 15.249 and similar regulations. Rating Power Supply and All Input/Output Pins Non-Operating Case Temperature Soldering Temperature (10 seconds / 5 cycles max.) Value -0.3 to +4.0 -50 to +100 260 Units V C C SM-20H Case Electrical Characteristics Characteristic Operating Frequency Modulation Types OOK Data Rate ASK Data Rate Transmitter Performance Peak RF Output Power, 250 A TXMOD Current Peak Current, 250 A TXMOD Current OOK Turn On/Turn Off Times ASK Output Rise/Fall Times 2nd - 4th Harmonic Outputs 5th - 10th Harmonic Outputs Non-harmonic Spurious Outputs Sleep Mode Current Sleep to Transmit Switch Time Transmit to Sleep Switch Time Control Input Logic Low Level Control Input Logic High Level Power Supply Voltage Range Operating Ambient Temperature VCC TA 1 Vcc - 300 2.2 -40 3.7 +85 IS tTOR tRTO 0.7 16 10 200 PO ITP tON/tOFF tTR/tTF 1.5 12 15/10 1.1/1.1 -50 -55 -50 dBm mA s s dBm dBm dBm A s s mV mV Vdc C Sym fo Notes Minimum 913.80 OOK & ASK 20 115.2 kbps kbps Typical Maximum 914.20 Units MHz RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: info@rfm.com http://www.rfm.com TX6004-070805 Page 1 of 6 Transmitter OOK Configuration Transmitter ASK Configuration +3 C RFB2 VDC C DCB + C RFB2 +3 VDC C DCB + T/S T/S 17 CNT RL1 16 VCC 2 15 P WIDTH 14 P RATE 13 THLD 1 12 THLD 2 RREF 19 18 CNT RL0 L AT 20 GND 3 RFIO 19 18 CNT RL0 17 CNT RL1 16 VCC 2 15 P WIDTH 14 P RATE 13 THLD 1 12 THLD 2 RREF L AT 11 TOP VIEW GND1 VCC 1 2 AGC CAP 3 PK DET 4 BB OUT 5 CMP IN 6 RX DATA 7 TX MOD 8 GND2 LPF ADJ 9 10 20 GND 3 RFIO 11 L ESD TOP VIEW GND1 VCC 1 2 AGC CAP 3 PK DET 4 BB OUT 5 CMP IN 6 RX DATA 7 TX MOD 8 GND2 LPF ADJ 9 10 1 L ESD 1 L RFB R TXM +3 VDC C RFB1 Modulation Input L RFB R TXM +3 VDC C RFB1 Modulation Input Transmitter Set-Up, 3.0 Vdc, -40 to +85 C Item Nominal NRZ Data Rate Minimum Signal Pulse Maximum Signal Pulse TXMOD Resistor DC Bypass Capacitor RF Bypass Capacitor 1 RF Bypass Capacitor 2 RF Bypass Bead Series Tuning Inductor Shunt Tuning/ESD Inductor Symbol DRNOM SPMIN SPMAX RTXM CDCB CRFB1 CRFB2 LRFB LAT LESD OOK 2.4 416.67 1666.68 4.7 4.7 27 100 Fair-Rite 10 100 ASK 19.2 52.08 208.32 4.7 4.7 27 100 Fair-Rite 10 100 ASK 115.2 8.68 34.72 4.7 4.7 27 100 Fair-Rite 10 100 Units kbps s s K F pF pF vendor nH nH Notes see page 1 single bit 4 bits of same value 5%, for 0 dBm output tantalum 5% NPO 5% NPO 2506033017YO or equivalent 50 ohm antenna 50 ohm antenna CAUTION: Electrostatic Device. Observe precautions when handling. Notes: 1. Do not allow the voltage applied to a control input pin to exceed Vcc + 200 mV. 2. The companion receiver to the TX6004 is the RX6004. Please see RFM's web site at www.rfm.com for details. RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: info@rfm.com http://www.rfm.com TX6004-070805 Page 2 of 6 Transmitter Theory of Operation Transmitter Chain The transmitter chain consists of a SAW coupled-resonator oscillator followed by a modulated buffer amplifier. The SAW coupled resonator output filter suppresses transmitter harmonics to the antenna. Transmitter operation supports two modulation formats, on-off keyed (OOK) modulation, and amplitude-shift keyed (ASK) modulation. When OOK modulation is chosen, the transmitter output turns completely off between "1" data pulses. When ASK modulation is chosen, a "1" pulse is represented by a higher transmitted power level, and a "0" is represented by a lower transmitted power level. OOK modulation provides compatibility with first-generation ASH technology, and provides for power conservation. ASK modulation must be used for high data rates (data pulses less than 200 s). ASK modulation also reduces the effects of some types of interference and allows the transmitted pulses to be shaped to control modulation bandwidth. The modulation format is chosen by the state of the CNTRL0 and the CNTRL1 mode control pins, as discussed below. In the OOK mode, the oscillator amplifier TXA1 and buffer amplifier TXA2 are turned off when the voltage to the TXMOD input falls below 220 mV. In the OOK mode, the data rate is limited by the 20/15 s turn-on and turn-off time of the oscillator. In the ASK mode TXA1 is biased ON continuously, and the output of TXA2 is modulated by the TXMOD input current. Minimum output power occurs in the ASK mode when the modulation driver sinks about 10 A of current from the TXMOD pin. Introduction RFM's TX-series hybrid transmitters are specifically designed for shortrange wireless data communication applications. These transmitters provide robust operation, very small size, low power consumption and low implementation cost. All critical RF functions are contained in the hybrid, simplifying and speeding design-in. The transmitters can be readily configured to support a wide range of data rates and protocol requirements. TX-series transmitters feature excellent suppression of output harmonics and virtually no other RF emissions, making them easy to certify to shortrange (unlicensed) radio regulations. Transmitter Block Diagram Figure 1 is the general block diagram of the transmitter. Please refer to Figure 1 for the following discussions. Antenna Port The only external RF components needed for the transmitter are the antenna and its matching components. Antennas presenting an impedance in the range of 35 to 72 ohms resistive can be satisfactorily matched to the RFIO pin with a series matching coil and a shunt matching/ESD protection coil. Other antenna impedances can be matched using two or three components. For some impedances, two inductors and a capacitor will be required. A DC path from RFIO to ground is required for ESD protection. Transmitter Block Diagram Antenna SAW Coupled Resonator SAW CR Filter Ant Tune TXA1 TXA2 Tune/ESD Modulation & Bias Control R TXM TX IN CN TRL1 CN TRL0 Figure 1 RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: info@rfm.com http://www.rfm.com TX6004-070805 Page 3 of 6 The transmitter RF output power is proportional to the input current to the TXMOD pin. A series resistor is used to adjust the peak transmitter output power. 1.5 dBm of output power requires about 450 A of input current. Transmitter Mode Control The three transmitter operating modes - transmit ASK, transmit OOK, and power-down (sleep), are controlled by the Modulation & Bias Control function, and are selected with the CNTRL1 and CNTRL0 control pins. Setting CNTRL1 high and CNTRL0 low place the unit in the ASK transmit mode. Setting CNTRL1 low and CNTRL0 high place the unit in the OOK transmit mode. Setting CNTRL1 and CNTRL0 both low place the unit in the powerdown mode. (Note that the resistor driving TXMOD must also be low in the power-down mode to minimize power-down current.) CNTRL1 and CNTRL0 are CMOS compatible inputs. These inputs must be held at a logic level; they cannot be left unconnected. Turn-On Timing The maximum time required for either the OOK or ASK transmitter mode to become operational is 5 ms after the supply voltage reaches 2.2 Vdc. The total turn-on time to stable transmitter operation for a 10 ms power supply rise time is 15 ms. Sleep and Wake-Up Timing The maximum transition time from either transmit mode to the sleep mode (tTOS and tTAS) is 10 s after CNTRL1 and CNTRL0 are both low (1 s fall time). The maximum time required to switch from the sleep mode to either transmit mode (tSTO and tSTA) is 16 s. Most of this time is due to the start-up of the transmitter oscillator. Transmitter Pin Out GND1 1 VCC1 NC NC NC NC NC TXMOD NC 2 3 4 5 6 7 8 9 10 GND2 11 NC 20 RFIO B SM-20H Package Drawing C D E 19 18 17 16 15 14 13 12 GND3 CNTRL0 CNTRL1 VCC2 NC NC NC H A F NC G .1225 .1625 .1475 .1875 mm Dimension Min A .370 .345 .305 .265 .225 Inches Max 10.135 6.985 2.032 1.905 0.635 1.143 3.429 1.651 Min .389 .265 .070 .065 .015 .035 .125 .055 Nom .395 .270 .076 .070 .020 .040 .130 .060 Max .400 .275 .080 .075 .025 .045 .135 .065 .435 Nom 10.033 6.858 1.930 1.778 0.508 1.016 3.302 1.524 9.881 6.731 1.778 1.651 0.381 0.889 3.175 1.397 B C D E .185 .145 .09 .105 .065 0.000 .090 .220 .310 F G H 0.000 Dimensions in inches. SM-20H PCB Pad Layout RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: info@rfm.com http://www.rfm.com TX6004-070805 Page 4 of 6 Pin Descriptions Pin 1 Name GND1 Description GND1 is the RF ground pin. GND2 and GND3 should be connected to GND1 by short, low-inductance traces. VCC1 is the positive supply voltage pin for the transmitter output amplifier and the transmitter base-band circuitry. VCC1 is usually connected to the positive supply through a ferrite RF decoupling bead which is bypassed by an RF capacitor on the supply side. See the description of VCC2 (Pin 16) for additional information. No connection. Printed circuit board pad may be grounded or floating. No connection. Printed circuit board pad may be grounded or floating. No connection. Printed circuit board pad may be grounded or floating. No connection. Printed circuit board pad may be grounded or floating. No connection. Printed circuit board pad may be grounded or floating. The transmitter RF output voltage is proportional to the input current to this pin. A series resistor is used to adjust the peak transmitter output voltage. 1.5 dBm of output power requires 450 A of input current. In the ASK mode, minimum output power occurs when the modulation driver sinks about 10 A of current from this pin. In the OOK mode, input signals less than 220 mV completely turn the transmitter oscillator off. Internally, this pin appears to be a diode in series with a small resistor. Peak transmitter output power PO for a 3 Vdc supply voltage is approximately: 8 TXMOD PO = 7*(ITXM)2, where PO is in mW, and the peak modulation current ITXM is in mA A 5% resistor value is recommended. In the OOK mode, this pin is usually driven with a logic-level data input (unshaped data pulses). OOK modulation is practical for data pulses of 200 s or longer. In the ASK mode, this pin accepts analog modulation (shaped or unshaped data pulses). ASK modulation is practical for data pulses 8.7 s or longer. This pin must be low in the power-down (sleep) mode. Please refer to the ASH Transceiver Designer's Guide for additional information on modulation techniques. No connection. Printed circuit board pad may be grounded or floating. GND2 is an IC ground pin. It should be connected to GND1 by a short, low inductance trace. No connection. Printed circuit board pad may be grounded or floating. No connection. Printed circuit board pad may be grounded or floating. No connection. Printed circuit board pad may be grounded or floating. No connection. Printed circuit board pad may be grounded or floating. No connection. Printed circuit board pad may be grounded or floating. VCC2 is the positive supply voltage pin for the transmitter oscillator. Pin 16 must be bypassed with an RF capacitor, and must also be bypassed with a 1 to 10 F tantalum or electrolytic capacitor. Power supply voltage ripple should be limited to 10 mV peak-to-peak. See the ASH Transceiver Designer's Guide for additional information. CNTRL1 and CNTRL0 select the transmit modes. CNTRL1 high and CNTRL0 low place the unit in the ASK transmit mode. CNTRL1 low and CNTRL0 high place the unit in the OOK transmit mode. CNTRL1 and CNTRL0 both low place the unit in the power-down (sleep) mode. CNTRL1 is a high-impedance input (CMOS compatible). An input voltage of 0 to 300 mV is interpreted as a logic low. An input voltage of Vcc - 300 mV or greater is interpreted as a logic high. An input voltage greater than Vcc + 200 mV should not be applied to this pin. A logic high requires a maximum source current of 40 A. A logic low requires a maximum sink current of 25 A (1 A in sleep mode). This pin must be held at a logic level; it cannot be left unconnected. CNTRL0 is used with CNTRL1 to control the operating modes of the transmitter. See the description of CNTRL1 for more information. GND3 is an IC ground pin. It should be connected to GND1 by a short, low inductance trace. RFIO is the transmitter RF output pin. This pin is connected directly to the SAW filter transducer. Antennas presenting an impedance in the range of 35 to 72 ohms resistive can be satisfactorily matched to this pin with a series matching coil and a shunt matching/ESD protection coil. Other antenna impedances can be matched using two or three components. For some impedances, two inductors and a capacitor will be required. A DC path from RFIO to ground is required for ESD protection. 2 VCC1 3 4 5 6 7 NC NC NC NC NC 9 10 11 12 13 14 15 NC GND2 NC NC NC NC NC 16 VCC2 17 CNTRL1 18 19 CNTRL0 GND3 20 RFIO RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: info@rfm.com http://www.rfm.com TX6004-070805 Page 5 of 6 RF Output Power vs ITXM 1.000 0.875 3.5 V 2.7 V 0.750 Output Power in mW 0.625 0.500 0.375 0.250 0.125 0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 ITXM in mA VTXM vs ITXM 1.00 0.98 0.96 0.94 VTXM in V 0.92 0.90 0.88 0.86 0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 ITXM in mA Note: Specifications subject to change without notice. RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: info@rfm.com http://www.rfm.com TX6004-070805 Page 6 of 6 |
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