C.Arnaboldi, A.Baù, P.Carniti, L.Cassina, A.Giachero, C.Gotti, M.Maino, A.Passerini, G.Pessina
INFN Sezione di Milano Bicocca e Università degli Studi di Milano Bicocca, Dipartimento di Fisica
Piazza della Scienza 3, 20126, Milano, IT
CUORE is an array composed of 1000 cryogenic detectors for the study of the 0
 of Te. The power dissipation of the whole electronics system is slightly less than 1500 W.
Here is the setup for the power supply system.
AC/DC:
48 V, 25 A
4 units
10 m
DC/DC:
3 independent outputs, 0

13 V,
150 W
30 units
10 m
Filter
3 m 0.5 m
Front-end
Linear regulators:
3 independent outputs,
5

13 V, 4 A, 1 ppm/ C, 250 nVRMS
30 units 30 units
988 units

The production has been done (30 units) and the system was tested and characterized completely.
1000
100
10
Noise floor
NOise fllor fit
DCDC noise
DCDC noise fit
1
10
1
10
2
10
3
10
4
10
5 freq (Hz)
10
6
10
7
10
8
Switching noise has been almost completely suppressed by proper filtering
RMS noise on 10 KHz is < 3

V,
RMS noise on 20 MHz is < 20

V
RMS noise on 50 MHz is < 25

V
11

V/div 1
 s/div