TA32305ENG(O,EL) Toshiba, TA32305ENG(O,EL) Datasheet - Page 6

• Manufacturer Part Number: TA32305ENG(O,EL)
• Description: IC RECEIVER RFIC 450MHZ 30SSOP
• Manufacturer: Toshiba

Specifications of TA32305ENG(O,EL)

• Frequency: 240MHz ~ 450MHz
• Current - Receiving: 5.6mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.2 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 30-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Applications: -
• Sensitivity: -
• Memory Size: -
• Data Rate - Maximum: -
• Modulation Or Protocol: -
• Other names: TA32305ENG(0,EL); TA32305ENG(0EL); TA32305ENG(0EL); TA32305FNG(EL); TA32305FNG(EL)

Functions
1. Waveform Shaper Circuit (comparator)
2. RSSI Function
3. S Curve Characteristics
4. V
5. Local Oscillator Circuit
6. U/L switch pin
become approximately 100dBµV.
RSSI (pin 23) is converted to a voltage by the internal resistance. Thus, connecting external resistance R
to pin 21 varies the gradient of the RSSI output as shown below. Note that due to the displacement of
temperature coefficients between external resistor R and the internal IC resistor IC resistor, the
temperature characteristic of the RSSI output may change. Also, the maximum RSSI value should be
V
In case of widening the detection range, heightening IF frequency or lowering demodulation output,
make the gradient of the S curve characteristics gentle less than typical (120pF).
Also, use the same voltage supply source for GND1 (21 pin) and GND2 (9 pin) (or connect them).
The local oscillator circuit is external-input-only. The device incorporates no transistor for oscillation.
Input to pin 1 at a level from 92 to 105dBµV.
Adjust the values of constants C shown in the application circuit diagram so that the input level will
frequency.
OUT (24 pin).
CC
CC
The output data (pin 30) are inverted.
DC potential corresponding to the input level of IF IN (pin 8) is output to RSSI (pin 23). Output to
Changing external capacitance C27 varies the gradient of the S curve characteristics as shown below.
Use the same voltage supply for V
It is possible to switch Mixer output frequency to upper local or lower local comparing RF input
When using this IC by about 2.2V (low supply), set the constant of C27 100pF or add attenuator to AF
− 0.8 V or less.
Pin and GND Pin
Figure 1
23
CC1
Figure 3
IF frequency
(2 pin) and V
6
After C is
lessened
CC2
(7 pin) and V
IF input level
Figure 2
After R is
connected
CC3
(12 pin) (or connect them).
TA32305FN/FNG
2003-12-04