TA32305FN/FNG

2003-12-04

7

7. RF Amp Current Adjustment

The RF amp current dissipation can be regulated by varying resistor R as shown in the figure below.

When R

= 560 Ω, the current dissipation is approximately 600 µA.

Figure 4

8. Battery-Saving (BS) Function

The IC incorporates a battery-saving function. These functions offer the following selection.

Receiver

FM Mode (FM/AM pin: GND)

RX Pin

Circuit Status in the IC

IC Current

Dissipation

(at no signal)

H

Circuits in operation:

･

×8 circuit

･Mixer

･RF amp

･Comparator

･IF amp

･Detector circuit

･RSSI

･Comparator capacitor charger circuit

5.6 mA (typ.)

L

All circuits

0 mA (typ.)

AM Mode (FM/AM pin: OPEN)

RX Pin

Circuit Status in the IC

IC Current

Dissipation

(at no signal)

H

ircuits in operation:

･

×8 circuit

･Mixer

･RF amp

･Comparator

･IF amp

･RSSI

･Comparator capacitor charger circuit

5.3 mA (typ)

L

All circuits

0 mA (typ)

Transmitter

TX Pin

Circuit Status in the IC

IC Current

Dissipation

(at no signal)

H

Circuits in operation:

･

×8 circuit

･TX amp

4.3 mA (typ)

L

All circuits

0 mA (typ)

17

RF DEC