參數(shù)資料
型號: TA31273FN
廠商: Toshiba Corporation
英文描述: AM RF/IF Detector IC
中文描述: 上午射頻/中頻檢測器IC
文件頁數(shù): 5/14頁
文件大?。?/td> 198K
代理商: TA31273FN
TA31273FN
2002-07-08
5
6. Battery-saving (BS) function and Lo switch LOBS function
The IC incorporates a battery-saving function and a Lo switch function. These functions offer the following
selection.
BS Pin/LOBS Pin
Circuit Status in the IC
IC Current Dissipation
(at no signal)
H/H
Circuits in operation
x8 circuit
Mixer
RF amp
Comparator
IF amp
RSSI
Comparator capacitor charger circuit
6.8 mA (typ.)
H/L
x8 circuit only halted, Frequency set by
external circuit can be used as-is.
3.8 mA (typ.)
L/H
x8 circuit only in operation
3.0 mA (typ.)
L/L
All circuits halted
0 mA (typ.)
7. RF amp gain 1
RF amp gain 1 (G
V
(RF) 1) is a reference value calculated as follows. Measure GRF in the following figure.
Figure 4
G
V
(RF) 1 is calculated as follows:
G
V (RF) 1
=
G
RF
G
V (MIX)
8. IF amp gain
The intended value is 70dB.
9. Waveform-shaping output duty cycle
The specified range of electrical characteristics is only available for single-tone.
10. Local frequency range (after multiplying frequency by 8)
When the multiplier circuit is used, the local frequency will be in the range 250.7 MHz to 439.3 MHz.
2
1000 pF
1
4
6
16
14
11
3
SAW
0.01
μ
F
SG
50dB
μ
V
G
RF
6
6 pF
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