Electrical Specifications

MC13852 Advance Information, Rev. 2.0

4

Freescale Semiconductor

Table 3 shows the use of the Gain, Enable and Band pins (along with the Vcc and RF out pins), to select

Active mode (High Gain), Bypass mode (Low Gain), or Standby mode (Disable) operation.

Table 4 lists electrical characteristics associated with noise performance measured in a 50

Ω system.

Additional noise parameters are listed in Table 14 and Table 15. Also listed are the typical Icc and RF

turn-on times for the device.

Table 5 lists the electrical characteristics measured on evaluation boards that are tuned for typical

application frequencies. Further details on the application circuits are shown in Section 4; details on the

boards are shown in Section 5.

Table 3. Truth Table

Pin Function

Pin Name

Enable

Disable

Low Gain High Gain Low Gain High Gain

Logic Circuit Bias Vcc

Vcc

1

1

1

1

Toggles Gain Mode (Active or Bypass)

Gain

0

1

0

1

Toggles LNA On/Off

Enable

1

1

0

0

Selects the LNA

Band

1

1

1

1

NOTES: 1. Logic state "1" equals Vcc voltage. Logic state of "0" equals ground potential.

2. Vcc is inductively coupled to LNA Out pin and Vcc pin.

3. Minimum logic state "1" for enable and gain pins is 1.25V.

4. Maximum logic state "0" for enable and gain pins is 0.8V.

Table 4. Electrical Characteristics (Vcc = 2.75 V, Ta = 25

Characteristic

Symbol

Min

Typ

Max

Unit

Insertion Gain

R1=1.2 k

Ω, Freq=434 MHz

R1=1.2 k

Ω, Freq=900 MHz

20.4

16.4

21.9

18.3

—dB

Maximum Stable Gain and/or Maximum Available Gain [Note1]

R1=1.2 k

Ω, Freq=434 MHz

R1=1.2 k

Ω, Freq=900 MHz

MSG, MAG

26.7

22

28.2

23.5

—dB

Minimum Noise Figure

R1=1.2 k

Ω, Freq=434 MHz

R1=1.2 k

Ω, Freq=900 MHz

NFmin

—

0.92

0.84

1.2

1.1

dB

Associated Gain at Minimum Noise Figure

R1=1.2 k

Ω, Freq=434 MHz

R1=1.2 k

Ω, Freq=900 MHz

Gnf

27.6

21

29.6

23

—dB

Icc and RF Turn On Time

Enable trigger total time of 1.8 usec from 0 to 2.75 V

Icc rise time from 0 to 76% of final current level

Icc rise time from 0 to 87% of final current level

RF on time from leading edge of enable trigger to RF turn-on

——

6.4

9.6

1.37

—

usec

NOTES: 1. Maximum Available Gain and Maximum Stable Gain are defined by the K factor as follows:

MAG=|S21/S12(K+/-sqrt(K2-1))|, if K>1,

MSG =|S21/S12|, if K<1