CMH82

CMH82 TRIQUINT | Alldatasheet

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Technical content

CMH82 - Preliminary Datasheet (Rev 3nl, 1/02) 1 CMH82

• High-Linearity, Cellular LNA/Mixer IC for use in TDMA and CDMA Mobile Phones
• Integrated bypass switch for LNA
• GaAs PHEMT Process
• Leadless 3.5 x 3.5 mm. SMT package
• LO Input power range: -12.0 to 0 dBm
• Operating voltage range: 2.7 to 4 V
• Total current consumption: 20 mA
• Adjustable Mixer Gain and IP3 ESD: Electro static discharge sensitive device Observe handling Precautions! Preliminary Datasheet Type Marking Ordering code (tape and reel) Package CMH82 H82 TBD VQFN-20 Maximum Ratings Symbol Value Unit min max Supply Voltage VDD 0 4 V DC-Voltage at RF Ports VRF - 0.3 0.3 V DC-Voltage at GND Ports VGND - 0.3 0.3 V DC-Voltage at CNTL Ports VCNTL 0 0.3 + VDD V Power into LO Input Pin,LO 10 dBm Operating Temperature Ta -40 85 °C Channel Temperature TCh 150 °C Storage Temperature Tstg -55 150 °C Thermal Resistance Channel to Soldering Point (GND) RthChS 102 °C /W LNA IF AMPS CDMA LO

CMH82 - Preliminary Datasheet (Rev 3nl, 1/02) 2 CMH82

Electrical Characteristics

Parameter, min typ max Unit RF - Frequency 869 - 894 MHz LO - Frequency (1) 919 - 1194 MHz IF Frequency range 50 - 300 MHz LO Power Input -12.0 - 0.0 dBm Supply Voltage (Vdd) 2.7 - 4.0 V High Logic Level (H) 2.4 2.7 0.3 + VDD V Low Logic Level (L) 0.0 - 0.3 V 1) Low-side LO can be achieved using external tuning LNA – Performance of LNA: Test conditions: Ta = 25°C, VDD= 2.7 V, fRF = 869 - 894 MHz Mode – High Gain, High Linearity min typ max Unit Operating Current 6.5 mA Noise Figure 1.1 dB Gain 12.5 dB Input / Output return loss 10 dB 3rd Order Input Intercept Point 10.0 dBm Mode – High Gain, Reduced Current min typ max Unit Operating Current 4.5 mA Noise Figure 1.2 dB Gain 12.3 dB Input / Output return loss 10 dB 3rd Order Input Intercept Point 8.0 dBm Mode – Low Gain, By-Pass Mode min typ max Unit Operating Current 0 mA Noise Figure 4.5 dB Gain -4.5 dB Input / Output return loss 10 dB 3rd Order Input Intercept Point 25 dBm

CMH82 - Preliminary Datasheet (Rev 3nl, 1/02) 3 CMH82 Test conditions: Ta = 25°C; VDD= 2.7V, PLO = -10 dBm, fLO = fRF + f IF, fIF = 85MHz Mode – High Gain, High Linearity CDMA min typ max Unit Operating Current 13.5 mA Conversion Gain(1) 15.5 dB Noise Figure 4.5 dB 3rd Order Input Intercept Point 6.5 dBm RF Input return loss 10 dB LO Input return loss 10 dB IF Output Impedance (2) 695+j*135 Ω Mode – Reduced Current CDMA min typ max Unit Operating Current 11.0 mA Conversion Gain(1) 15.2 dB Noise Figure 4.7 dB 3rd Order Input Intercept Point 4.5 dBm RF Input return loss 10 dB LO Input return loss 10 dB IF Output Impedance (2) 695+j*135 Ω Mode – AMPS min typ max Unit Operating Current 11 mA Conversion Gain 13.5 dB Noise Figure 5.7 dB 3rd Order Input Intercept Point 2.5 dBm RF Input return loss 10 dB LO Input return loss 10 dB IF Output Impedance (2) 172+j*78 Ω 1) CDMA Mixer Gain may be varied from approximately 10 to 20 dB (typical) by choice of external components. See notes. 2) IF Output externally tuned to desired impedance

CMH82 - Preliminary Datasheet (Rev 3nl, 1/02) 4 CMH82 FULL CHAIN – LNA / Downconverter Characteristics Test conditions: Ta = 25 °C, VDD= 2.7 V, PLO = -10 dBm, fIF = 85 MHz Mode – High Gain, High Linearity CDMA min typ max Unit Total operating Current 20 mA Conversion Gain (1) 25 dB Noise Figure 1.9 dB Input IP3 -3.5 dBm LNA Input IP3 10.0 dBm Mode – High Gain, Reduced Current CDMA min typ max Unit Total operating Current 15.5 mA Conversion Gain (1) 24.5 dB Noise Figure 2.0 dB Input IP3 -5 dBm LNA Input IP3 8.0 dBm Mode – Low Gain (LNA bypass) CDMA (2) min typ max Unit Total operating Current 11.0 mA Conversion Gain (1) 7.7 dB Noise Figure 12.0 dB Input IP3 11.5 dBm Mode – AMPS (2) min typ max Unit Total operating Current 15.5 mA Conversion Gain (1) 22.8 dB Noise Figure 2.3 dB Input IP3 -6.5 dBm 1) Assumes 3 dB loss for image filter 2) Assumes reduced current mode

CMH82 - Preliminary Datasheet (Rev 3nl, 1/02) 5 CMH82 PIN Symbol Description

1 LO in Mixer LO Input

2 GND Ground

3 LO Vdd Supply voltage for LO Buffer Amp

4 Mix out Mixer output to IF Amplifier

5 AMPS in AMPS IF Amplifier input

6 CDMA in CDMA IF Amplifier input

7 GND Ground

8 Ifa src IF Amplifier FET source ground

9 CDMA out CDMA IF output

10 AMPS out AMPS IF output

11 Mode AMPS or CDMA IF mode control

12 RFA in Downconverter input from image filter

13 RFA Vdd Supply voltage for RFA

14 Vdd Supply voltage

15 LNA Vdd Supply voltage for LNA

16 LNA out Output of LNA

17 GND Ground

18 LNA in RF Input to LNA

19 Rcv Reduced current mode control

20 Gctl Control voltage for LNA gain selection

PIN Assignments & Functional Block Diagram AMPS LNA IFA CDMA LOA RFA Truth Table Control Voltage Operating Mode Mode Ctl Gain Ctl Rcv Only High Gain & Linearity H H H High Gain, Low Current H H L Low Gain (LNA bypass) H L L AMPS L H L

CMH82 - Preliminary Datasheet (Rev 3nl, 1/02) 6 CMH82 Application Circuit Component Description Package Type Component Description Package Type C1 CAP, 47 PF 0402 L1 IND, 19 NH 0402 C2 CAP, 10K PF 0402 L2 IND, 12 NH 0402 C3 CAP, 100 PF 0402 L3 IND, 12 NH 0402 C4 CAP, 47 PF 0402 L4 IND, 330 NH 0805 C5 CAP, 47 PF 0402 L5 IND, 270 NH 0603 C6 CAP, 1000 PF 0402 L6 IND, 220 NH 0603 C7 CAP, 18 PF 0402 L7 IND, 270 NH 0603 C8 CAP, 10 PF 0402 L8 IND, 18 NH 0402 C9 CAP, 10K PF 0402 L9 IND, 12 NH 0402 C10 CAP, 10K PF 0402 C11 CAP, 12 PF 0402 R1 RES, 47 KOHM 0402 C12 CAP, 100 PF 0402 R2 RES, 47 KOHM 0402 C13 CAP, 3.3 PF 0402 R3 RES, 47 KOHM 0402 C14 CAP, 0.5 PF 0402 Component values for IF = 85 MHz. LO = RF +IF . External Components 16 14 11121315 1 2 3 4 5 6 C13 C2 C3 C12 C11 C14 Vdd Vdd Vdd Mode Rcv RF in LO in Gctl C10 L2 L3 Vdd

CMH82 - Preliminary Datasheet (Rev 3nl, 1/02) 7 CMH82 Package Outline - VQFN 20 Recommended PCB Layout

CMH82 - Preliminary Datasheet (Rev 3nl, 1/02) 8 CMH82 C5 C4 C1 C2 L5C8 C10 C12 C11 C13Jumper R3 R2 R1 C14 CMH82 RF SAW filter 2000 (mil) 2000 (mil) Evaluation Board

CMH82 - Preliminary Datasheet (Rev 3nl, 1/02) 9 CMH82 CMH82 – Application Information DC Biasing: Supply Voltage. One regulated voltage source is needed for CMH82. On the evaluation board, it is labeled VDD. Minimum LO Power for Proper Biasing For proper biasing of the CMH82, a minimum LO input power is required. If the part is turned ON without any LO drive applied, all currents will be extremely high. The minimum LO required is approximately –12 dBm. Operation with LO input powers below the minimum value causes the current to increase in all amplifier stages. For higher LO input power levels the current stays relatively constant over a wide range of LO powers. Proper matching of the LO amplifier is also important to achieve the lowest current consumption and to minimize the required LO input power. Adjustable Current Level The CMH82 can operate in two different current/linearity modes: High Linearity (with higher current) and Reduced Current (lower linearity). To operate with reduced current the voltage on pin 19 (RCV) should be set LOW. Some additional current reduction can be achieved by reducing the voltage at pin 14 by inserting a resistor between VDD and pin 14. The current pulled by pin 14 is approximately 1 mA. Higher currents can be realized by using a higher VDD voltage. Tuning LO and IF Amplifiers: The CMH82 can be tuned to utilize either high or low side LO frequencies and allows a wide range of IF frequencies. Depending on the chosen frequency plan the off chip components for the LO and IF amplifiers will need to be optimized. An application circuit with all component values is provided for high side LO injection with IF frequency of 85 MHz (RF freq 869 – 894 MHz). Two external components (L9 and L8) are required for tuning the LO. L8 is critical for setting the minimum current and to achieve the constant DC current over the operating band. L9 sets the input match. Components L7, C11 and C12 form the input match for the IF amplifiers and will vary depending on the chosen IF frequency. The inductor on pin 8 allows adjustment to the gain of the IF amplifiers. Output matching components shown in the application circuit provide a transformation for a 50 Ohm load impedance. The output impedance for the CDMA IFA (looking into pin 9) at 85 MHz is approximately (695 + j*135) Ohms. The AMPS output impedance is approximately (172 + j*78) Ohms at 85 MHz.

CMH82 - Preliminary Datasheet (Rev 3nl, 1/02) 10 CMH82 Downconverter Gain Adjustment: The Downconverter gain can be adjusted by changing the source feedback inductor L6 for the IFA. Higher inductance will give lower downconverter gain and typically improve the IIP3. Gain/Current Control Pins: LOW = 0 to 0.3 V HIGH = Vdd to (Vdd – 0.3) V VGAIN – select between high and low gain states in the LNA. VGAIN = HIGH : LNA ON (~12 dB Gain, ~ 6 mA current) VGAIN = LOW : LNA bypassed (~ 4 dB Loss, no current) VRCV - selects Current/Linearity mode (changes current in LNA/RFA/IFA) VRCV = LOW selects Reduced Current Mode VRCV = HIGH selects High Linearity Mode. VMODE - selects which IF amplifier is ON VMODE = LOW selects AMPS mode VMODE = HIGH selects CDMA mode Other Notes: Inductor L1 is critical for setting the Noise Figure of the LNA. A high Q wire wound inductor (e.g. Coilcraft) is recommended to achieve minimum NF. LNA current can be determined by subtracting the current in Low Gain mode from the current in High Gain mode (keeping VRCV and VMODE constant). Capacitor C14 can be eliminated if a slightly higher (~0.5 dB) downconverter noise figure is tolerable. Control lines (G_CNTL, VRCV and VMODE) have an input impedance of > 1 MΩ when Vdd is ON. When VDD is off, they have approximately 20 KΩ input impedance.