THS9001DBVT datasheet(11/20 Pages) STMICROELECTRONICS

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APPLICATION INFORMATION

1 M

10 M

100 M

1 G

−30

−25

−20

−15

−10

−5

S21

S11

S22

S12

f − Frequency − Hz

VS = 5 V,

R(BIAS) = 237 W,

L(COL) = 470 nH

THS9001

SLOS426B – NOVEMBER 2003 – REVISED JANUARY 2007

The THS9001 is a medium power, cascadeable, amplifier optimized for high intermediate frequencies in radios.

The amplifier is unconditionally stable and design requires only 2 dc-blocking capacitors, 1 power-supply bypass

capacitor, 1 RF choke, and 1 bias resistor. Refer to Figure 25 for circuit diagram.

The THS9001 operates with a power supply voltage ranging from 2.5 V to 5.5 V.

The value of R(BIAS) sets the bias current to the amplifier. Refer to Figure 7. This allows the designer to trade-off

linearity versus power consumption. R(BIAS) can be removed without damage to the device.

Component selection of C(BYP), CIN, and COUT is not critical. The values shown in Figure 25 were used for all the

data shown in this data sheet.

The amplifier incorporates internal impedance matching to 50

Ω that can be adjusted for various frequencies of

operation by proper selection of L(COL).

Figure 20 shows the s-parameters of the part mounted on the standard EVM with VS = 5 V, R(BIAS) = 237Ω , and

L(COL) = 470 nH. With this configuration, the part is very broadband, and achieves greater than 15-dB input and

output return loss from 50 MHz to 325 MHz.

Figure 20. S-Parameters of THS9001 Mounted on the Standard EVM With VS = 5 V, R(BIAS) = 237 Ω,

and L(COL) = 470 nH

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