Application Note Using the ACA0861D at +8 V and +5 V Supply Voltages Rev 0 Although the ACA0861D Line Amplifier IC is designed for optimum operation with a +12 VDC supply, it is possible to operate the part at reduced supply voltages, with some performance reduction. For such an operation, a slight change in external bias conditions has to be implemented, depending on the voltage level chosen. Table 1: Summary of Typical Single Part Performance (1) SUPPLY VOLTAGE +12 +8 +5 V Current 470 420 230 mA 12 11.5 11 dB 128 ch flat +36 dBmV 128 ch flat +32 dBmV -71 - -68 - -62 dB c 128 ch flat +36 dBmV 128 ch flat +32 dBmV -73 - -70 - -62 dB c 128 ch flat +36 dBmV 128 ch flat +32 dBmV -67 - -65 - -57 dB c Gain CTB C SO Xmod (1) Two devices can be cascaded together for higher gain applications. See ACA0861 Data Sheet for details. Table 2: Connections for Proper Bias (Normal Operation) 12 VOLTS 8 VOLTS 5 VOLTS Pi n 2 No Connection (Open) 3.9 KΩ to GND 2 KΩ to VDD (+5 V) Pi n 7 No Connection (Open) 5.1 KΩ to VDD (+8 V) 1.5 KΩ to GND 470 Ω to GND SUPPLY VOLTAGE 02/2003 Using the ACA0861D at +8 V and +5 V Supply Voltages C1 .01F RF In 16 2 15 3 T1 C2 .01F R1 5.1K 1 R2 1.5K R3 3.9K ACA0861D C3 470pF 14 4 13 5 12 6 11 7 10 8 9 RF Out T2 C4 470pF L1 390nH +8V C5 .01F L2 390nH C6 .01F Figure 1: Test Circuit for +8 Volt VDD ACA0861D: CTB at +8 V, 420 mA 128 Channels Output Figure 2:Flat, CTB+36 at dBmV +8 V, 420 mA 128 Channels Flat, +36 dBmV Output -50 -55 CTB (dBc) -60 -65 -70 -75 -80 -85 0 100 200 300 400 500 Frequency (MHz) 2 Application Note - Rev 0 02/2003 600 700 800 900 1000 Using the ACA0861D at +8 V and +5 V Supply Voltages ACA0861D: CSO at +8 V, 420 mA 128 Channels +36 Output Figure 3:Flat, CSO at dBmV +8 V, 420 mA 128 Channels Flat, +36 dBmV Output -50 -55 CSO (dBc) -60 -65 -70 -75 -80 -85 0 100 200 300 400 500 600 700 800 900 1000 800 900 1000 Frequency (MHz) ACA0861D: Xmod +8 V, 420 mA 128 Channels +36 +8 dBmV Output Figure 4:Flat, Xmod V, 420 mA 128 Channels Flat, +36 dBmV Output -50 -55 Xmod (dBc) -60 -65 -70 -75 -80 -85 0 100 200 300 400 500 600 700 Frequency (MHz) Application Note - Rev 0 02/2003 3 Using the ACA0861D at +8 V and +5 V Supply Voltages ACA0861D: S11 at +8 V Figure 5: S11 at +8 V 0 -5 -10 S11 Mag (dB) -15 -20 -25 -30 -35 -40 -45 -50 -55 0 100 200 300 400 500 600 700 800 900 1000 Frequency (MHz) ACA0861D: S21 at +8 V Figure 6: S21 at +8 V 14 13 S21 Mag (dB) 12 11 10 9 8 0 100 200 300 400 500 600 Frequency (MHz) 4 Application Note - Rev 0 02/2003 700 800 900 1000 Using the ACA0861D at +8 V and +5 V Supply Voltages ACA0861D: S12 at +8 V Figure 7: S12 at +8 V 0 -5 -10 S12 Mag (dB) -15 -20 -25 -30 -35 -40 -45 -50 0 100 200 300 400 500 600 700 800 900 1000 700 800 900 1000 Frequency (MHz) ACA0861D: S22 at +8 V Figure 8: S22 at +8 V 0 -5 -10 S22 Mag (dB) -15 -20 -25 -30 -35 -40 -45 0 100 200 300 400 500 600 Frequency (MHz) Application Note - Rev 0 02/2003 5 Using the ACA0861D at +8 V and +5 V Supply Voltages R1 2K 1 C1 .01F RF In 2 3 T1 C2 .01F R2 470 16 ACA0861D C3 470pF 15 14 4 13 5 12 6 11 7 10 8 9 RF Out T2 C4 470pF L1 390nH L2 390nH C5 .01F +5V C6 .01F Figure 9: Test Circuit for +5 Volt VDD ACA0861D: CTB at +5 V, 230 mA 128 Channels Flat, +32 dBmV Output Figure 10: CTB at +5 V, 230 mA 128 Channels Flat, +32 dBmV Output -50 -55 CTB (dBc) -60 -65 -70 -75 -80 -85 0 100 200 300 400 500 600 Frequency (MHz) 6 Application Note - Rev 0 02/2003 700 800 900 1000 Using the ACA0861D at +8 V and +5 V Supply Voltages ACA0861D: CSO at +5 V, 230 mA 128 Channels +32at dBmV Output Figure 11: Flat, CSO +5 V, 230 mA 128 Channels Flat, +32 dBmV Output -50 -55 CSO (dBc) -60 -65 -70 -75 -80 -85 0 100 200 300 400 500 600 700 800 900 1000 800 900 1000 Frequency (MHz) ACA0861D: Xmod at +5 V, 230 mA 128 Channels Flat, +32 dBmV Output Figure 12: Xmod at +5 V, 230 mA 128 Channels Flat, +32 dBmV Output -50 -55 Xmod (dBc) -60 -65 -70 -75 -80 -85 0 100 200 300 400 500 600 700 Frequency (MHz) Application Note - Rev 0 02/2003 7 Using the ACA0861D at +8 V and +5 V Supply Voltages ACA0861D: S11 at +5 V Figure 13: S11 at +5 V 0 -5 S11 Mag (dB) -10 -15 -20 -25 -30 -35 -40 0 100 200 300 400 500 600 700 800 900 1000 Frequency (MHz) ACA0861D: S21 at +5 V Figure 14: S21 at +5 V 14 13 S21 Mag (dB) 12 11 10 9 8 0 100 200 300 400 500 600 Frequency (MHz) 8 Application Note - Rev 0 02/2003 700 800 900 1000 Using the ACA0861D at +8 V and +5 V Supply Voltages ACA0861D: S12 at +5 V Figure 15: S12 at +5 V 0 -5 -10 S12 Mag (dB) -15 -20 -25 -30 -35 -40 -45 -50 0 100 200 300 400 500 600 700 800 900 1000 700 800 900 1000 Frequency (MHz) ACA0861D: S22 at +5 V Figure 16: S22 at +5 V 0 -5 -10 S22 Mag (dB) -15 -20 -25 -30 -35 -40 -45 0 100 200 300 400 500 600 Frequency (MHz) Application Note - Rev 0 02/2003 9 Using the ACA0861D at +8 V and +5 V Supply Voltages NOTES 10 Application Note - Rev 0 02/2003 Using the ACA0861D at +8 V and +5 V Supply Voltages NOTES Application Note - Rev 0 02/2003 11 Using the ACA0861D at +8 V and +5 V Supply Voltages ANADIGICS, Inc. 141 Mount Bethel Road Warren, New Jersey 07059, U.S.A. Tel: +1 (908) 668-5000 Fax: +1 (908) 668-5132 URL: http://www.anadigics.com E-mail: [email protected] IMPORTANT NOTICE ANADIGICS, Inc. reserves the right to make changes to its products or to discontinue any product at any time without notice. The product specifications contained in Advanced Product Information sheets and Preliminary Data Sheets are subject to change prior to a product’s formal introduction. Information in Data Sheets have been carefully checked and are assumed to be reliable; however, ANADIGICS assumes no responsibilities for inaccuracies. ANADIGICS strongly urges customers to verify that the information they are using is current before placing orders. WARNING ANADIGICS products are not intended for use in life support appliances, devices or systems. Use of an ANADIGICS product in any such application without written consent is prohibited. 12 Application Note - Rev 0 02/2003