TAT7457_15 Datasheet, PDF (1/10 Pages) TriQuint Semiconductor – 75 HEMT Adjustable Gain RF Amplifier

TAT7457
75 Ω pHEMT Adjustable Gain RF Amplifier
Applications
 Single-ended and Push-pull Optical Receivers
 Low-noise Drop Amplifiers
 Distribution Amplifiers
 Multi-Dwelling Units
 Single-ended Gain Block
SOT-89 Package
Product Features
 Gain, return loss and bias externally adjustable
 On-chip active bias for consistent bias current and
repeatable performance
 DC – 2000 MHz bandwidth
 Low noise: typical NF < 2 dB to 1000MHz
 Flexible 5 V to 8 V biasing
 IDD = 120 mA typical at VDD 5V in application circuit
 19 dB typical gain in application circuit
 +40 dBm typical OIP3
 +61 dBm typical OIP2
 +21 dBm typical P1dB
 Low distortion: CSO -66 dBc, CTB -78 dBc
 (10 dBmV/ch at input, 80 ch NTSC flat)
 pHEMT device technology
 SOT-89 package
Functional Block Diagram
Backside Paddle - GND
1
RF IN
2
GND
3
RF OUT / V_DD
External feedback circuit for gain
and return loss adjustment.
General Description
The TAT7457 is a low cost RF amplifier designed for
applications from DC to 2000 MHz. 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 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-chip capacitors limiting
the low freq response which extends down to DC.
The TAT7457 is fabricated using 6-inch GaAs pHEMT
technology to optimize performance and cost. It provides
excellent gain and return loss consistency inherent to the
pHEMT process.
Pin Configuration
Pin No.
1
2
3
Backside Paddle
Label
RF IN
GND
RF OUT/VDD
GND
Ordering Information
Part No.
Description
TAT7457
75 Ω High Linearity pHEMT Amplifier
TAT7457-EB
Assembled Evaluation Board
Standard T/R size = 1000 pieces on a 7” reel.
Datasheet: Rev G 09-16-14
© 2013 TriQuint
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Disclaimer: Subject to change without notice
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