Digital Step Attenuator
DAT-31R5-PP+
TB-339 Evaluation Board Schematic Diagram
1
2
3
4
5
6
7
8
PARALLEL
CONTROL
J1.1
DC SUPPLY
J2.2
1
2
13
12
11
10
4
9
8
13
12
11
10
4
9
8
14
7
14
7
IC1
7
IC2
1
2
3
5
6
1
2
3
5
6
+
C1
C2
C4
C5
C6
C7
C8
C3
R1
R2
R4
R5
R6
R3
20
19
18
17
16
15
1
C16
RFin
N/C
C8
RFin
R9
R7
2
3
4
5
14
13
RFout
GND
RFout
DAT
12
11
GND
GND
GND
1
2
6
7
8
9
10
LE
R8
C9
2
1
6
IC3
C11
+
R11
R10
1
2
3
4
DC SUPPLY
J2.1
5
LE CONTROL
J1.2
C10
Bill of Materials
Resistor 0603 10 KOhm +/- 1%
R10, R11 Resistor 0603 470 Ohm +/- 1%
R9 Resistor 0402 10 KOhm +/- 1%
C2 - C10 NPO Capacitor 0603 100pF +/- 5%
R1 - R8
C1, C11
IC1, IC2
IC3
Tantalum Capacitor 100nF +/- 10%
Hex inverting Schmitt trigger MM74HC14
Dual non-inverting Schmitt trigger SN74LVC2G17
TB-339
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Page 11 of 12
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MINI [ MINI-CIRCUITS ]
