TAT7457 75 pHEMT Adjustable Gain RF Amplifier Product Overview The TAT7457 is a low-cost RF amplifier designed for applications from DC to 2000MHz. The balance of low noise and distortion provides an ideal solution for a wide range of broadband amplifiers used in cable television applications such as optical receivers and low noise front ends. The TAT7457 has features allowing a great deal of design- in flexibility. Gain and return loss are adjustable with an external feedback resistor. An internal bias circuit mitigates SOT-89 Package the effect of temperature and process variation and an external resistor may be used to adjust the bias current to optimize distortion or noise performance. There are no on- Key Features chip capacitors limiting the low frequency response which extends down to DC. Gain, return loss and bias externally adjustable The TAT7457 is fabricated using 6-inch GaAs pHEMT On-chip active bias for consistent bias current and technology to optimize performance and cost. It provides repeatable performance excellent gain and return loss consistency inherent to the DC 2000MHz bandwidth pHEMT process. Low noise: typical NF < 2dB to 1000MHz Flexible 5V to 8V biasing I = 120mA typical at V 5V in application DD DD circuit Functional Block Diagram 19dB typical gain in application circuit +40dBm typical OIP3 Backside Paddle - GND +61dBm typical OIP2 +21dBm typical P1dB Low distortion: CSO -66dBc, CTB -78dBc (10dBmV/ch at input, 80 ch NTSC flat) pHEMT device technology 1 2 3 RF IN GND RF OUT / V DD Applications Single-ended and Push-pull Optical Receivers Low-noise Drop Amplifiers Distribution Amplifiers External feedback circuit for gain and return loss adjustment. Multi-Dwelling Units Single-ended Gain Block Top View Ordering Information Part Number Ordering Info Description TAT7457 1074961 TAT7457 Sample (1 piece) TAT7457EB 1074962 50-1200MHz Evaluation Board TAT7457TR 1074959 1000 pieces on a 13 reel Data Sheet Rev A, August 23, 2021 - 1 of 14 - www.qorvo.com Subject to change without notice All rights reserved TAT7457 75 pHEMT Adjustable Gain RF Amplifier Absolute Maximum Ratings Parameter Rating Storage Temperature Range 65 to +150C Device Voltage +10V Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Recommended Operating Conditions Parameter Min Typ Max Unit V 5 8 V DD I 120 mA DD 6 Tj for >10 hours MTTF +150 C Electrical specifications are measured at specified test conditions. Specifications are not guaranteed over all recommended operating conditions. Electrical Specifications (1) Parameter Condition Min Typ Max Unit Frequency Range DC 1200 MHz Gain 19 dB Gain Flatness +/-0.7 dB 50-1000MHz Noise Figure 2.0 dB Input Return Loss 18 dB Output Return Loss 18 dB Gain 19 dB Gain Flatness +/-0.7 dB 50-1200MHz Noise Figure 2.3 dB Input Return Loss 14 dB Output Return Loss 17 dB Output P1dB +21 dBm Output IP2 f1=225MHz, f2= 325MHz 61 dBm Pout=+5dBm/tone Output IP3 40 dBm CSO 10dBmV/ch at input, flat loading, 80 -66 dBc channels NTSC+QAM up tp 1218MHz CTB -78 dBc Thermal Resistance, jc Junction to Case 38 C/W Notes: 1. Typical performance at these conditions: Temp = +25C, V = +5V, 75 system DD Data Sheet Rev A, August 23, 2021 - 2 of 14 - www.qorvo.com Subject to change without notice All rights reserved