MADR-007098 Datasheet | MACOM Technology Solutions

Features - Linearizes PIN Diode Attenuators Over a Wide Attenuation Range - Output Currents up to 12 m A - Operates with a Single Supply Voltage of +3V to +12V - Low Quiescent Currents - Single Control Voltage - Test Boards are Available - Tape and Reel Packaging Available - Lead-Free SOW-16 Package - 100% Matte Tin Plating over Copper - Halogen-Free “Green” Mold pound - 260°C Reflow patible - Ro HS- pliant Version of DR65-0002 Description M/A-'s MADR-007098-000100 is a break point free driver that produces a logarithmic output current suitable for linearizing PIN diode based shunt attenuators. This driver, in conjunction with customer defined external ponents, produces a linear transfer function (d B/V) between the input control voltage of the driver and the attenuation output of the PIN attenuator. The MADR-007098-000100 has been optimized for linearizing M/A-’s MAAV007089-000100 or MAAV-007090-000100 attenuators, but will function well with most types of cathode grounded, PIN attenuators. The driver is packaged in a SOW-16 package for mercial SMT applications. A typical schematic for a 30 d B, 7.5 d B/V linear attenuator is shown in Figure 1. Ordering Information Part Number Package MADR-007098-000100 Bulk Packaging MADR-007098-0001TR 1000 piece reel MAAV-007089-DR01TB MAAV-007090-DR01TB Test Board with Circuit per Figure 1 (MAAV-007089-000100, GSM Attenuator) Test Board with Circuit per Figure 1 (MAAV-007090-000100, PCS Attenuator) Note: Reference Application Note M513 for reel size information. Circuit Description : (Reference Figures 1 and 2) The input divider, R1 and the sum of R2 and R3, sets the overall transfer function of the circuit. To increase the transfer function, decrease the Control Voltage and the value of R1. Varying the value of R4 will optimize the linearity of the circuit. One can achieve a very linear transfer function (less than ± 1 d B/V) by driving the attenuator over a smaller portion of its dynamic range. In the case of the...