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CATV Doubler – Hybrid RFIC Data Sheet: Rev C 06-05-12 - 1 of 8 - Disclaimer: Subject to change without notice © 2012 TriQuint Semiconductor, Inc. Connecting the Digital World to the Global Network®
Applications
CATV Line Amplifiers CATV System Amplifiers Distribution Nodes Green Applications Product Features Functional Block Diagram 75 Ω, 40 – 1000 MHz Bandwidth GaAs pHEMT & MESFET Technology 21 – 27 dB configurable gain Integrated linearization Flexible bias voltage and current for optimum efficiency SOIC-16 Wide Package General Description Pin Configuration The TAT8857 is a cost e ffective 75 Ω RFIC Amplifier designed for use in Doubler CATV applications up to 100 0 MHz. It works with readily available SMT baluns and transformers to provide a highly flexible low cost replacement for traditional hybrids. Gain of the TAT 8857 may be easily adjusted by varying external components, allowing for a family of Doubler solutions to be developed from a single RFIC. The TAT8857 provides integrated linearization to improve the 3rd order distortion performance. The TAT8857 may be protected against transient surges with the TQP200002 and an output high pass filter network. Consult TriQuint for discussion. The TAT8857 supports traditional 24 V and 12 V supply voltages. Bias current may be adjusted to suit particular requirements with standard or active biasing approaches. Consult TriQuint for further discussion. Pin # Symbol Pin # Symbol
1 OUT 1A 10 IN 2B
2 LIN ADJ A 11 OUT 2B
3 IN 1A 12 GATE B
4 BIAS 1A 13 GATE A
5 BIAS 1B 14 OUT 2A
6 IN 1B 15 IN 2A
7 LIN ADJ B 16 BIAS 2A
8 OUT 1B 17 GND
9 BIAS 2B
Ordering Information
Part No. Description TAT8857 RFIC TAT8857-EB evaluation board Standard T/R size = 1000 pieces on a 7” reel.
CATV Doubler – Hybrid RFIC Data Sheet: Rev C 06-05-12 - 2 of 8 - Disclaimer: Subject to change without notice © 2012 TriQuint Semiconductor, Inc. Connecting the Digital World to the Global Network® Specifications Absolute Maximum Ratings Parameter Rating Storage Temperature -65 to 150 oC Operation of this device outside the parameter ranges given above may cause permanent damage. Recommended Operating Conditions Parameter Min Typ Max Units Vcc 24 V Icc 350 mA Electrical specifications are measured at specified test conditions. Specifications are not guaranteed over all recommended operating conditions. Electrical Specifications Test conditions unless otherwise noted: 25ºC case temp, +24V Vsupply Parameter Conditions Min Typical Max Units Operational Frequency Range 40 1000 MHz Test Frequency MHz Gain 25 dB Input Return Loss 18 dB Output Return Loss 17 dB Output P1dB at 500 MHz 31 dBm Output IP3 See Note 1 52 dBm CTB See Note 2 -73 dBc CSO See Note 2 -74 dBc CIN See Note 2 60 dB XMOD See Note 2 -68 dBc Noise Figure 4.0 dB Vbias 24 V Idd See Note 3 350 mA Thermal Resistance (jnc. to case) jc 3.4 oC/W Notes: 1. 100 MHz tone spacing, tone 1 at 225 MHz, tone 2 at 325 MHz, low and high side intermod products. equivalent of 53 dBmV/ch at 1003.25 MHz. 3. Active biasing in easily implemented with traditional dual-pnp approaches. Biasing at 12 V is also possible.
CATV Doubler – Hybrid RFIC Data Sheet: Rev C 06-05-12 - 3 of 8 - Disclaimer: Subject to change without notice © 2012 TriQuint Semiconductor, Inc. Connecting the Digital World to the Global Network® Application Circuit 40-1000 MHz 2 to 1 BALUN IN GND OUT1 OUT2 PRISEC 1 2 1 2 1 2 LOWER B LOWER A 8857D UPPER B UPPER A BIAS 1A BIAS 1B LIN ADJ A LIN ADJ B BIAS 2A BIAS 2B GATE A GATE B 8 9 TAT8857F3 L7 600 L8 600 R11 18 R12 18 L19 600 R5 8.09k R6 8.09k L11 470nH C13 0.01uF R20 C15 2.2pF L13 27nH R13 1.3k L17 8.2nH R9 100 C11 0.01u R7 180 L9 82nH C9 82pF C7 .01uF 1.8pF .01uF R1 27k L12 470nH C14 0.01uF R21
33 L16
2.2pF L14 27nH R14 1.3k L18 8.2nH R10 100 C12 0.01u R8 180 L10 82nH C10 82pF C8 .01uF 1.8pF .01uF R2 27k .01uF C22 .01uF +24v C24 .033uF C25 .033uF L20 910nH R19 R18 2.7K Vgate Vgate Vbias Vbias MABACT0051 T2 MABA-007681 GND C28 0.7pF C27 0.7pF 5.1R21 390 15nH 390 15nH -CT2010RF IN RF OUT L15 9nH 0.5pF 0.5pF 3.9nH C17 C18 R15 R16 L30 5.1
CATV Doubler – Hybrid RFIC Data Sheet: Rev C 06-05-12 - 4 of 8 - Disclaimer: Subject to change without notice © 2012 TriQuint Semiconductor, Inc. Connecting the Digital World to the Global Network® Typical Performance 40-1000 MHz Notes: 1. 25ºC case temp, 24V supply,. equivalent of 53 dBmV/ch at 1003.25 MHz Gain (dB) Frequency (MHz) Gain vs. Frequency +85°C +25°C −40°C -35 -30 -25 -20 -15 -10 Input Return Loss (dB) Frequency (MHz) Input Return Loss vs. Frequency +85°C +25°C −40°C -35 -30 -25 -20 -15 -10 Output Return Loss (dB) Frequency (MHz) Output Return Loss vs. Frequency +85°C +25°C −40°C P1dB (dBm) Frequency (MHz) P1dB vs. Frequency +85°C +25°C −40°C NF (dB) Frequency (MHz) Noise Figure vs. Frequency +85°C +25°C −40°C CIN (dB) Frequency (MHz) CIN vs. Frequency +85°C +25°C −40°C -90 -85 -80 -75 -70 -65 -60 CTB (dBc) Frequency (MHz) CTB vs. Frequency +85°C +25°C −40°C -90 -85 -80 -75 -70 -65 -60 CSO (dBc) Frequency (MHz) CSO vs. Frequency +85°C +25°C −40°C -80 -75 -70 -65 -60 -55 -50 XMOD (dBc) Frequency (MHz) XMOD vs. Frequency +85°C +25°C −40°C
CATV Doubler – Hybrid RFIC Data Sheet: Rev C 06-05-12 - 5 of 8 - Disclaimer: Subject to change without notice © 2012 TriQuint Semiconductor, Inc. Connecting the Digital World to the Global Network® Detailed Device Description The TAT8857 is similar to other parts offered on the market; it contains t wo separate amplifiers . A major difference is the TAT8857 allows much flexibility to set gain and bias to cover multiple applicati ons without an additional stage. This makes it ideal for green designs. It uses a cost effective high voltage MESFET technology (designed for CATV) and a pHEMT process (developed for high-volume applications). On-chip linearization is also utilized. Bias Current Adjustment 2 to 1 BALUN IN GND OUT1 OUT2 PRISEC 1 2 1 2 1 2 LOWER B LOWER A 8857D UPPER B UPPER A BIAS 1A BIAS 1B LIN ADJ A LIN ADJ B BIAS 2A BIAS 2B GATE A GATE B 8 9 TAT8857F3 L7 600 L8 600 R11 18 R12 18 L19 600 R5 8.09k R6 8.09k L11 470nH C13 0.01uF R20 C15 2.2pF L13 27nH R13 1.3k L17 8.2nH R9 100 C11 0.01u R7 180 L9 82nH C9 82pF C7 .01uF 1.8pF .01uF R1 27k L12 470nH C14 0.01uF R21 2.2pF L14 27nH R14 1.3k L18 8.2nH R10 100 C12 0.01u R8 180 L10 82nH C10 82pF C8 .01uF 1.8pF .01uF R2 27k .01uF C22 .01uF +24v C24 .033uF C25 .033uF L20 910nH R19 R18 2.7K Vgate Vgate Vbias Vbias MABACT0051 T2 MABA-007681 GND C28 0.7pF C27 0.7pF 5.1R21 390 15nH 390 15nH -CT2010RF IN RF OUT L15 9nH 0.5pF 0.5pF 3.9nH C17 C18 R15 R16 L30 5.1 Voltage Biasing: 24V and 12V The TAT8857 has two amplifiers which can be configured to split a 24 V supply (and share the same current) or both amplifiers can be biased from a 12V supply and draw current independently. Bias current is determined by 2 settings: 1. Size of DC feedback resistors - decreasing R1 & R2 will increase IDD 2. Tail resistors - decreasing R21 will increase IDD, but lead to wider variations Active biasing schemes are possible but not necessary for most applications. Best performance is with IDD = 350mA
CATV Doubler – Hybrid RFIC Data Sheet: Rev C 06-05-12 - 6 of 8 - Disclaimer: Subject to change without notice © 2012 TriQuint Semiconductor, Inc. Connecting the Digital World to the Global Network® In the 24V case the voltage split ratio is left to the customer and is set by V gate. In 24v applications, no capacitance should be put on Vgate; this prevents a turn-on over-voltage condition from damaging the output FET. 2 to 1 BALUN IN GND OUT1 OUT2 PRISEC 1 2 1 2 1 2 LOWER B LOWER A 8857D UPPER B UPPER A BIAS 1A BIAS 1B LIN ADJ A LIN ADJ B BIAS 2A BIAS 2B GATE A GATE B 8 9 TAT8857F3 L7 600 L8 600 R11 18 R12 18 L19 600 R5 8.09k R6 8.09k L11 470nH C13 0.01uF R20 C15 2.2pF L13 27nH R13 1.3k L17 8.2nH R9 100 C11 0.01u R7 180 L9 82nH C9 82pF C7 .01uF 1.8pF .01uF R1 27k L12 470nH C14 0.01uF R21 2.2pF L14 27nH R14 1.3k L18 8.2nH R10 100 C12 0.01u R8 180 L10 82nH C10 82pF C8 .01uF 1.8pF .01uF R2 27k .01uF C22 .01uF +24v C24 .033uF C25 .033uF L20 910nH R19 R18 2.7K Vgate Vgate Vbias Vbias MABACT0051 T2 MABA-007681 GND C28 0.7pF C27 0.7pF 5.1R21 390 15nH 390 15nH -CT2010RF IN RF OUT L15 9nH 0.5pF 0.5pF 3.9nH C17 C18 R15 R16 L30 5.1 Additional information can be requested from TriQuint Applications Engineering, sjcapplications.engineering@tqs.com. Voltage divider should be done with same or lower resistor values to prevent gate leakage currents in the output FET from affecting Vgate.
CATV Doubler – Hybrid RFIC Data Sheet: Rev C 06-05-12 - 7 of 8 - Disclaimer: Subject to change without notice © 2012 TriQuint Semiconductor, Inc. Connecting the Digital World to the Global Network® Mechanical Information Package Information and Dimensions This package is lead -free/RoHS-compliant. The plating material on the leads is 100% Matte Tin . It is compatible with both lead-free (maximum 260 °C reflow temperature) and lead (maximum 245 °C reflow temperature) soldering processes. The TAT8857 will be marked with an “ TAT8857” designator with a lot code marked below the part designat or. The “Y” represents the last digit of the year the part was manufactured, the “XXXX” is an auto -generated number and “Z” refers to a wafer number in a lot batch. Mounting Configuration All dimensions are in millimeters (inches). Angles are in degrees. Notes: 1. A heatsink underneath the area of the PCB for the mounted device is strictly required for proper thermal operation. Damage t o the device can occur without the use of one. 2. Ground / thermal vias are critical for the proper performance of t his device. Vias should use a .xx mm (#xx / .0xxx”) diameter drill and have a final plated thru diameter of .xx mm (.0xx”). 3. Add as much copper as possible to inner and outer layers near the part to ensure optimal thermal performance.
CATV Doubler – Hybrid RFIC Data Sheet: Rev C 06-05-12 - 8 of 8 - Disclaimer: Subject to change without notice © 2012 TriQuint Semiconductor, Inc. Connecting the Digital World to the Global Network® Product Compliance Information ESD Information ESD Rating: Class III Value: Passes 500 V min. Test: Charged Device Model (CDM) Standard: JEDEC Standard JESD22-C101 Solderability Compatible with the latest version of J -STD-020, Lead free solder, 260° This part is compliant with EU 2002/95/EC RoHS directive (Restrictions on the Use of Certain Hazardous Substances in Electrical and Electronic Equipment). MSL Rating Level 3 at +260 °C convection reflow The part is rated Moisture Sensitivity Level <xy> at 260°C per JEDEC standard IPC/JEDEC J-STD-020. Contact Information For the latest specifications, additional product information, worldwide sales and distribution locations, and information ab out TriQuint: Email: info-sales@tqs.com Fax: +1.707.526.1485 For technical questions and application information: Email: sjcapplications.engineering@tqs.com Important Notice The information contained herein is believed to be reliable. TriQuint makes no warranties regarding the information contained herein. TriQuint assumes no responsibility or liability whatsoeve r for any of the information contained her ein. TriQuint assumes no responsibility or liability whatsoever for the use of the information contained herein. The information contained herein is provided "AS IS, WHERE IS" and with all faults, and the entire risk associated with such information is entirely with the user. All information contained herein is subject to change without notice. Customers should obtain and verify the latest relevant information before placing orders for TriQuint products. The in formation contained herein or any use of such information does not grant, explicitly or implicitly, to any party any patent rights, licenses, or any other intellectual pro perty rights, whether with regard to such information itself or anything described by such information. TriQuint products are not warranted or authorized for use as critical components in medical, life -saving, or life -sustaining applications, or other applications where a failure would reasonably be expected to cause severe personal inju ry or death.