AK2400 Datasheet, PDF (15/52 Pages) Asahi Kasei Microsystems – High integrated receiver for PMR-LMR

[AK2400]
Analog Characteristics (2nd IF)
Unless otherwise noted VDD=2.7 to 5.5V, Ta=-40C to 85C.
Mode 6, LO2NDIN=50.4MHz,IFIP=50.85MHz, f=1.5kHz, fmod=1kHz、AGC+BPF=F2, {AGC_OFF}=0,
{AGC_KEEP_SEL}=0, {AGC_KEEP}=0, PGA0[2:0]=011. {SDATAOUT_OE}=0. The exposure back pad of
the package is connected to VSS. Test circuit is shown on page 45.
1) 2nd LO input
Parameter Symbol Conditions Min.
Typ.
Max. Unit
Remarks
Parameter
F_LO LO2NDIN
28.8
45.9
50.4
57.6
MHz
Local Frequency
V_LO LO2NDIN
0.2
Note) Input from LO2NDIN pin through DC cut
2.0
V_PP
Note
2) PGA0+2nd Mixer
Analog Characteristics (2nd IF) are included the circuit of IFIP input pin.
The input impedance of 2nd IF_INPUT is 50Ω typ. (See Figure 8 for input matching network)
Parameter
Input Impedance
Input Frequency
Voltage Gain
Conditions
Min.
Typ.
Max. Unit Remarks
50
Ω
F_LO
±0.45
MHz
48
dB
6 IFIP
L2
C3
R1
C2
L1
2nd IF_INPUT
C1
AVSS
C1=180pF,C2=91pF,L1=390nH for 28.80.45MHz
C1=15pF,C2=22pF,L1=470nH for 45.90.45MHz
C1=15pF,C2=22pF,L1=390nH for 50.40.45MHz
L2=470nH
LSI
R1=1.2k
C3=10nF
6 IFIP
L2
C3
R1
C2
L1
2nd IF_INPUT
L3
AVSS ^{L3=200nH,C2=15pF,L1=330nF for 57.60.45MHz}
L2=470nH
R1=1.2k
LSI
C3=10nF
Figure 8 Test circuit of IFIP Input pin (2nd IF)
014008989-E-01
15
2015/4