參數(shù)資料
型號(hào)： HFA3726IN96
廠商： INTERSIL CORP
元件分類(lèi)： 衰減器
英文描述： 400MHz Quadrature IF Modulator/Demodulator
中文描述： 10 MHz - 400 MHz RF/MICROWAVE QUADRAPHASE MODEM
封裝： PLASTIC, TQFP-80
文件頁(yè)數(shù)： 4/21頁(yè)
文件大?。?/td> 162K
代理商： HFA3726IN96
4
Pin Description
PIN
SYMBOL
DESCRIPTION
1
LIM1_BYP+
DC feedback pin for Limiter amplifier 1. Requires good decoupling and minimum wire length to a solid signal
ground.
2
LIM1_In+
Non inverting analog input of Limiter amplifier 1.
3
LIM1_In-
Inverting input of Limiter amplifier 1.
4
LIM1_BYP-
DC feedback pin for Limiter amplifier 1. Requires good decoupling and minimum wire length to a solid signal
ground.
5, 6,
7, 8
GND
Ground. Connect to a solid ground plane.
9
LPF_V
CC
Supply pin for the Low pass filter. Use high quality decoupling capacitors right at the pin.
10
2V REF
Stable 2V reference voltage output for external applications. Loading must be higher than 10k
. A bypass
capacitor of at least 0.1
μ
F is required.
11
LPF_BYP
Internal reference bypass pin. This is the common voltage (V
CM
) used for the LPF digital thresholds. Requires
0.1
μ
F decoupling capacitor.
12
LPF_TXI_In
Low pass filter in phase (I) channel transmit digital input. (Note 1)
13
LPF_TXQ_In
Low pass filter quadrature (Q) channel transmit digital input. (Note 1)
14
LPF_RXI_Out
Low pass filter in phase (I) channel receive output. Requires AC coupling. (Note 2)
15
LPF_RXQ_Out
Low pass filter quadrature (Q) channel receive output. Requires AC coupling. (Note 2)
16
GND
Ground. Connect to a solid ground plane.
17
GND
Ground. Connect to a solid ground plane.
18
LPF_Tune1
These two pins are used to fine tune the Low pass filter cutoff frequency. A resistor connected between the two
pins (R
TUNE
) will fine tune both transmit and receive filters. Refer to the tuning equation in the LPF AC
specifications.
19
LPF_Tune0
20
GND
Ground. Connect to a solid ground plane.
21
LPF_RX_PE
Digital input control pin to enable the LPF receive mode of operation. Enable logic level is High.
22
LPF_TX_PE
Digital input control pin to enable the LPF transmit mode of operation. Enable logic level is High.
23
LPF_TXQ-
Negative output of the transmit Low pass filter, quadrature channel. AC coupling is required. Normally connects to
the inverting input of the quadrature Modulator (Mod_TXQ-), pin 40.
24
LPF_TXQ+
Positive output of the transmit Low pass filter, quadrature channel. AC coupling is required. Normally connects to
the non inverting input of the quadrature Modulator (Mod_TXQ+), pin 39.
25
LPF_TXI-
Negative output of the transmit Low pass filter, in phase channel. AC coupling is required. Normally connects to
the inverting input of the in phase Modulator (Mod_TXI-), pin 38.
26
LPF_TXI+
Positive output of the transmit Low pass filter, in phase channel. AC coupling is required. Normally connects to the
non inverting input of the in phase Modulator (Mod_TXI+), pin 37.
27
LPF_RXQ-
Low pass filter inverting input of the receive quadrature channel. AC coupling is required. This input is normally
coupled to the negative output of the quadrature demodulator (Mod_RXQ-), pin 36.
28
LPF_RXQ+
Low pass filter non inverting input of the receive quadrature channel. AC coupling is required. This input is normally
coupled to the positive output of the quadrature demodulator (Mod_RXQ+), pin 35.
29
LPF_RXI-
Low pass filter inverting input of the receive in phase channel. AC coupling is required. This input is normally
coupled to the negative output of the in phase demodulator (Mod_RXI-), pin 34.
30
LPF_RXI+
Low pass filter non inverting input of the receive in phase channel. AC coupling is required. This input is normally
coupled to the positive output of the in phase demodulator (Mod_RXI-), pin 33.
31, 32
GND
Ground. Connect to a solid ground plane.
33
Mod_RXI+
In phase demodulator positive output. AC coupling is required. Normally connects to the non inverting input of the
Low pass filter (LPF_RXI+), pin 30.
34
Mod_RXI-
In phase demodulator negative output. AC coupling is required. Normally connects to the inverting input of the Low
pass filter (LPF_RXI-), pin 29.
HFA3726
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