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| Preliminary PBL 403 09 August 2000 PBL 403 09 3.6 V Differential Power Amplifier for DECT Telecommunications system Description. The PBL 403 09 is a differential two stage silicon MMIC power amplifier intended for use in handheld cordless terminals in the 1900 MHz band. It can deliver more than 27 dBm at 1900 MHz into a balanced 50 load using a single 3.6 V supply. The circuit has a logic input to control transmit on/off and can be operated up to 100 % duty cycle with minimum performance degradation. The circuit is housed in a specially designed QSOP16 (150 mil body ) package and the implementation requires only few external components. 25 GHz ft state-of-the-art deep trench isolated double-poly silicon bipolar process with additional features for improved wireless performance has been used. On-chip capacitors and inductors are used for the integrated internal matching network. Special front-side metallized substrate contacts provide excellent ground paths from active devices to the highly doped semiconductor substrate and package ground. Key features. * * * * * * * * 27 dBm output power 25 dB small signal gain 50 % Power Added Efficiency Simple logic on/off power control Battery charging conditions to 5.0 V ESD protected Excellent ruggedness On-chip input and interstage matching Differential input matched to 50 Easy implementation with a simple output matching network Proven RF Silicon Technology Reliability Low overall solution cost * V CC * * RF In A RF Out A & VCC * Applications. RF In B RF Out B & VCC * DECT Figure 1. Block diagram. Figure 2. Package outlook. 1 P B L 4 0 Power Control PA-ON 3 0 9 PBL 403 09 Maximum Ratings Parameter Supply voltage, continuous All inputs (zener protection) Operating case temperature Storage temperature range Symbol Vcc Top TStg Min. -25 -30 Max. 5.2 6.5 +80 +100 Unit V V C C Electrical Characteristics at room temperature Unless otherwise stated the values below are valid for Vcc = 3.6 V, Pin = 4dBm, ZL = 50 and f = 1900 MHz, pulsed mode t = 417 s, duty cycle 1/24. All data as measured in the recommended typical application circuit. Parameter Frequency range Power output Power Added Efficiency Power Added Efficiency Small signal Gain Isolation 2 nd and 3 rd harmonics Input VSWR Load Mismatch Stability and spurious Supply current Supply current Supply current Rise time Fall time PA - ON = low PA - ON = high I ( PA - ON ) low Condition PA - ON = low Pin = 10 dBm Pin = 4 dBm Pin = -10 dBm PA - ON = high, Pin = 4 dBm PA - ON = low, Pin < 4 dBm Symbol f P PAE PAE G Min. 1880 27 45 35 Typ. Max. Unit MHz dBm % % dB dB dBc Pin = 4-10 dBm, Vcc = 5.2 V, Load VSWR = 6:1 all phases Pin = 4-10 dBm, Vcc = 3.0-5.2 V, Load VSWR = 5:1 all phases No input signal present, IDC PA - ON = low Pin = 4 dBm IDC PA - ON = high IDC Pout to 1dB from final value. tr Measure time from switch to low. Pout to less than -20 dB measured tf from PA - ON pulse switched to high 1930 29 50 43 25.5 -35 -30 -35 1.6:1 3:1 no damage for 10 sec. All spurious below - 36 dBm 135 550 1 mA mA A A s V V A 10 1 2 -0.5 Vcc -0.5 110 0.5 Vcc +0.5 130 35 30 70 60 50 32 54 52 Pout [dBm]or Gain [dB] 25 20 15 10 5 0 -10 -5 0 5 10 15 Pin [dBm] Pout [dBm] Gain [dB] PAE [%] 30 Pout [dBm] Pout [dBm] 50 48 46 40 30 20 10 0 PAE [%] 28 Pin = 10 dBm Pin = 4 dBm 26 Pin = 10 dBm Pin = 4 dBm 44 42 40 24 2 2.5 3 Vcc [V] 3.5 4 2 2.5 3 Vcc [V] 3.5 4 Figure 3. Pout, Gain and PAE vs. Pin Vcc = 3.6 V 2 Figure 4. Pout vs. Vcc for Pin = 4 dBm and 10 dBm Figure 5. PAE vs.Vcc for Pin = 4 dBm and 10 dBm PBL 403 09 PA-ON 1 GND 2 RFinA 3 GND 4 GND 5 RFinB 6 GND 7 Vcc 8 16 GND 15 GND 14 RFoutA 13 GND 12 GND 11 RFoutB 10 GND 9 GND Figure 6. Pin configuration. Pin Descriptions: Refer to pin configuration. SO 1 2 3 4 5 6 7 8 Name PA-ON GND RFinA GND GND RFinB GND Vcc Function PA On/Off Control pin (active low) Common ground RF input Common ground Common ground RF input Common ground Supply voltage SO 9 10 11 12 13 14 15 16 Name GND GND RFoutB GND GND RFoutA GND GND Function Common ground Common ground RF output Common ground Common ground RF output Common ground Common ground Functional description. PBL403 09 is a differential two stage integrated power amplifier intended for DECT. The circuit is manufactured in a bipolar 5.0 V technology with additional features for improved wireless performance. Input and interstage matching is done completely on-chip, tuned to 1.9 GHz, and only normal supply decoupling plus output matching is necessary. If the device is used in a single ended environment, input and output transformers need to be added to the external circuitry. PBL403 09 is optimized to work at a supply voltage of 3.6 V, but is able to operate between 2.7 and 5.2 V. At 3.6 V it can deliver up to 31 dBm when driven into compression, while 27 dBm is guaranteed with an input power of 4 dBm. Best Power Added Efficiency (PAE) is obtained close to maximum output power where PAE exeeds 50 %. Small signal gain is 25-26 dB. In a DECT handset with the duty cycle 1/24, the average power dissipation in the circuit is low, normally between 30 to 40 mW. In the base station, the duty cycle can increase and PBL403 09 can be operated at CW with a small penalty in power gain and output power (< 0.5 dB). Operation is controlled through a power-on pin which is active low. When active, the current consumption is typically 135 mA without any input signal present. When not active, current consumption is less than 10 A. 3 PBL 403 09 Application information. DECT SINGLE ENDED POWER AMPLIFIER When used as a single ended power amplifier, please refer to fig.7 and the test board fig. 8. The 50 source impedance is converted to 50 differential with an LC-CL structure. Two series capacitors AC-couples the signal to the input of PBL403 09. Suitable value of the capacitors is 1 to 5 pF in order to compensate for series inductance of the PCB and package. Input impedance of the PBL403 09 is 50 differential. The ideal collector load of the open collector RF output of PBL403 09 is about 11 per side. A matching and combination network to 50 single ended case is shown in fig. 7. A shunt capacitor (2.7 pF) transforms each output to 50 . Both 50 outputs are AC coupled and then combined with an LC-CL structure to a 50 single ended output. PA-ON Vcc 10n 100p 100p 1.5p 3.9n input 1.5p 1.5p 3.9n 2.7p 1.5p 68 n 68 n 33p 1.1p 5.6n output 33p 1.1p 5.6n PBL 403 09 2.7p GND Figure 7. Evaluation setup including networks for unbalanced input/output. Figure 8. Evaluation testboard. 4 PBL 403 09 DECT RADIO WITH PBL402 15 TRANSCEIVER PBL403 09 together with the transceiver chip PBL402 15 form the base of the radio platform for DECT systems. The transmission part of the chip PBL402 15 has a differential output which can deliver up to 7 dBm. The output power can be programmed in steps. The outputs are of open-collector type. Suitable network between PBL402 15 and PBL403 09 is therefore shunt inductors from the open-collectors to Vcc and series capacitors to the RF inputs of PBL403 09. Suitable value of the capacitors is 1 to 5 pF in order to compensate for the series inductance of the PCB and package. Input impedance of the PBL403 09 is 50 differential. The ideal collector load of the open collector RF output of PBL403 09 is about 11 per side. A matching and combination network to 50 single ended case is shown in fig.9. A shunt capacitor (2.7 pF) transforms each output to 50 . Both 50 outputs are AC coupled and then combined with an LC-CL structure to a 50 single ended output. A power control signal with active low is received from PBL402 15. This signal controls power up/down of the PBL403 09. Supply decoupling consists of high frequency and low frequency decoupling capacitors. The high frequency decoupling capacitor should be placed close to the Vcc pin. 25 PA-ON 41 Vcc 33p 10n 100p 100p PBL 402 15 3.9n 3.9n 68 n 68 n 33p 14 output 11 33p 2.7p 2.7p 5.6n 1.1p 1.1p 5.6n 38 39 TxTx+ 1.5p 3 6 1.5p 8 1 PBL 403 09 GND Figure 9. DECT radio with PBL402 015 transceiver and PA. 5 PBL 403 09 Package drawing, QSOP 16 Dim. A A1 D e millimeters min. max. 1.35 0.10 0.20 0.15 4.80 3.81 0.635mm 5.70 0.40 6.20 1.27 1.75 0.25 0.30 0.25 4.98 3.99 inches min. 0.532 0.004 0.008 0.006 0.189 0.150 max. 0.688 0.0098 0.012 0.01 0.i96 0.157 B C D E e E H 0.025 inch ref. 0.228 0.016 0.244 0.050 H L = 0-8 deg. h Pin no 1 0.22 0.49 0.009 0.019 B 45 deg. A A1 C L Information given in this data sheet is believed to be accurate and reliable. However no responsibility is assumed for the consequences of its use nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Ericsson Microelectronics AB. These products are sold only according to Ericsson Microelectronics AB's general conditions of sale, unless otherwise confirmed in writing. Specifications subject to change without notice. 1522-PBL 403 09 Uen Rev.A (c) Ericsson Microelectronics AB August 2000 Ericsson Microelectronics AB S-164 81 Kista-Stockholm, Sweden Telephone: (08) 757 50 00 www.ericsson.se/microe 6 Ordering Information Package Temp. Range Part No. 16 pin plastic QSOP -25 to 80C PBL 403 09 |
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