3
9129AS–DAB–04/08
ATR2732N3
Table 2-1. Pin Description
Pin Symbol Function
1 VAMIXL Supply voltage (mixer for L-band)
2 VAVCOL Supply voltage (VCO for L-band)
3 TUNVL Tuning voltage for integrated L-band VCO (connected to PLL loop filter)
4 GDVCOL Ground (L-band VCO)
5 LNAVIN+ Input for VHF LNVGA (differential with pin 8)
6 LNAVL+ Connection for degeneration coil (inductance) to GNDLNA for VHF LNVGA
7 LNAVL– Connection for degeneration coil (inductance) to GNDLNA for VHF LNVGA
8LNAVIN
– Input for VHF LNVGA (differential with pin 5)
9 VALNA Supply voltage for LNVGAs
10 LNALO+ (Differential) output for L-band LNVGA
11 LNALO
– (Differential) output for L-band LNVGA
12 AGCRF Connection for time-constant capacitor of RF AGC (LNVGAs, external PIN diode)
13 GNDLNA Ground for LNVGAs
14 LNALIN+ (Differential) input for L-band LNVGA
15 LNALIN
– (Differential) input for L-band LNVGA
16 IPINDIO Current output to external PIN diode for additional attenuation of incoming signal (optional)
17 LNAVO+ (Differential) output of VHF LNVGA and/or mixer for L-band
18 LNAVO
– (Differential) output of VHF LNVGA and/or mixer for L-band
19 VABIAS Supply voltage for (internal) voltage and current bias reference circuits
20 CVREF Connection for capacitor for filtering internal voltage/current reference circuits (capacitor to VABIAS)
21 IF1O+ (Differential) Output of IFVGA1
22 IF1O
– (Differential) Output of IFVGA1
23 VA1 Supply voltage
24 RREFE Connection for current reference resistor (resistor to ground)
25 AGCSAW Connection for AGC time-constant capacitor of the VHF mixer
26 IF1IN+ (Differential) Input of 1st IFVGA
27 IF1IN
– (Differential) Input of 1st IFVGA
28 MIXVIN+ (Differential) Input of VHF mixer
29 MIXVIN
– (Differential) Input of VHF mixer
30 MIXVO+ (Differential) Output of VHF mixer
31 MIXVO
– (Differential) Output of VHF mixer
32 VAVCOV Supply voltage (VHF VCO)
33 TUNVV Tuning voltage for integrated VHF VCO (connected to PLL loop filter)
34 GDVCOV Ground (VHF VCO)
35 VFIL3 Voltage outputs for frequency tuning of VHF filters: antenna filter, preselection filter
36 VFIL2 Voltage outputs for frequency tuning of VHF filters: antenna filter, preselection filter
37 VFIL1 Voltage outputs for frequency tuning of VHF filters: antenna filter, preselection filter
38 VTNKREF Output voltage for tuning the reference tank (-varactor)
39 TNKREFI Reference-tank connection for to generate the tuning voltages for the external VHF filters (varactors)
40 TNKREFO Reference-tank connection for to generate the tuning voltages for the external VHF filters (varactors)
