Caen A7508 User manual

CAEN
Tools for Discovery
n
Electronic Instrumentation
User Manual UM6026
A7508
800V/50µA High Efficiency HV Power Supply
Rev. 1 - 29 May 2017

Purpose of this Manual
This document is the A7508 User's Manual; it contains information about the installation, the configuration and the
use of the device.
Change Document Record
Date
Revision
Changes
7 April 2017
0
Initial release
29 May 2017
1
Updated § 3
Symbols, abbreviated terms and notation
N.A.
Reference Documents
N.A.
CAEN S.p.A.
Via Vetraia, 11 55049 Viareggio (LU) - ITALY
Tel. [phone] Fax [phone]
[email protected]
www.caen.it
© CAEN SpA –2017
Disclaimer
No part of this manual may be reproduced in any form or by any means, electronic, mechanical, recording, or otherwise,
without the prior written permission of CAEN SpA.
The information contained herein has been carefully checked and is believed to be accurate; however, no responsibility
is assumed for inaccuracies. CAEN SpA reserves the right to modify its products specifications without giving any notice;
for up to date information please visit www.caen.it.
MADE IN ITALY : We stress the fact that all the boards are made in Italy because in this globalized world, where getting
the lowest possible price for products sometimes translates into poor pay and working conditions for the people who
make them, at least you know that who made your board was reasonably paid and worked in a safe environment. (this
obviously applies only to the boards marked "MADE IN ITALY", we cannot attest to the manufacturing process of "third
party" boards).

CAEN
Electronic Instrumentation
UM6026 –A7508 User Manual Rev. 1
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Index
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..................................................................................................8
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.........................................................................................................................9
..............................................................................................................................................................9
List of Figures
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............................................................................................................................................9
List of Tables
..............................................................................................................................................4
...................................................................................................................................................5
.......................................................................................................................8
....................................................................................................................8

CAEN
Electronic Instrumentation
UM6026 - A7508 User Manual Rev. 1
4
1Overview
The CAEN Mod. A7508 is a compact high efficiency power supply providing a programmable and monitorable output
voltage ranging from 0 to 800 V, when supplied with a +5 V input.
It is available with either positive or negative output voltage.
The board is provided with an over-current protection: if a current larger than the Iout maximum value is drawn, the
module is not being damaged.
The output voltage is regulated by providing a 0 to +2 V external voltage (Vset).
The module is engineered on a FR4 PCB, coated and housed in DC01 steel box. CAD Altium library components and 3D
step models are available on request.
Fig. 1: Mod. A7508
Ordering Option
Board Models
Description
Product Code
A7508N
A7508N -800V 50μA HV Power Supply Module (5V in)
WA7508NXAAAA
A7508P
A7508P +800V 50μA HV Power Supply Module (5V in)
WA7508PXAAAA
Tab. 1: Table of models and related items

CAEN
Electronic Instrumentation
UM6026 - A7508 User Manual Rev. 1
5
2Technical Specifications
Packaging
Material: DC01; dimension: W=29 mm; L=54 mm; H=16 mm
Contact pins
Male strip header; 2.54mm step; phosphor bronze; UL94V0 insulator
(see Fig. 2)
Operating temperature
-40° C ÷ +70° C
Storage temperature
-55° C ÷ +85° C
Voltage Supply (Vin)
+5 V ± 5%
Output Voltage (Vout)
0 ÷ ±800 V
Output polarity
Available positive or negative
Enable
If Enable > 3.5 V Channel active
If Enable < 1 V Channel disabled
Vmon Output (positive analog monitor)
0 ÷ +2 V
Vset Input (positive analog command)
0 ÷ +2 V
Important!: Vset must not exceed 2 V (Vout is not limited)
Iset Input (positive analog command)
0 ÷ +2 V
Imon Output (positive analog monitor)
0 ÷ +2 V
Status OVC bit
0÷5 V (High = OVC)
Vout/Vout (for ±5% Vin variations)
<1.5 X 10-3 @ full scale
Maximum Output Current (Iout)
50 µA @ ±800 V
Power requirement
<100 mW;
@ 800 V / 50 µA (Rload ≈ 17 MΩ)
Efficiency
50% @ Vout = 800 V (-45° C ÷ +70° C)
Output Ripple (Full Load)
Typical 3mVpp; Maximum 5mVpp
Vout / Temperature coefficient
< 50 ppm / °C
Vset vs. Vout Integral Non Linearity
<±0.3% (-60° C ÷ +60° C)
Vmon vs. Vout Integral Non Linearity
<±0.3% (-60° C ÷ +60° C)
Electromagnetic compatibility
Weak emission of electromagnetic impulse and RF; one-piece metal shielding
with several ground connections
Uniformity of a lot
< 1 %
Protection
Over current short circuit, sparks and humidity
Tab. 2: A7508 Technical Specifications
Fig. 2: Male strip header of A7508

CAEN
Electronic Instrumentation
UM6026 - A7508 User Manual Rev. 1
6
Fig. 3: Efficiency vs Vout and Temperature
Fig. 4: Power consumptions @ 800 V vs Temperature
0%
10%
20%
30%
40%
50%
60%
0 200 400 600 800 1000
Efficency (%)
Vout (V)
Efficiency (%) vs Vout and Temperature (RLoad = 17 MΩ)
-30 C°
0 C°
30 C°
60 C°
0,07
0,07
0,07
0,07
0,07
0,07
0,08
0,08
0,08
-40 -30 -20 -10 0 10 20 30 40
Watt
Temperature (C°)
Power Consumptions vs Temperature
(Vout= 800 V) (RLoad = 17 MΩ)

CAEN
Electronic Instrumentation
UM6026 - A7508 User Manual Rev. 1
7
Fig. 5: Temperature coefficient vs Vout
Fig. 6: Uniformity of a Lot (ΔVout/Vout)
Fig. 7: Integral non-linearity (ΔVout/Vout)
0
5
10
15
20
25
30
35
0 100 200 300 400 500 600 700 800 900
ppm/C°
Vout (V)
Temperature coefficent
(-30 to 60 C° RLoad = 17 MΩ)
0,00%
0,20%
0,40%
0,60%
0,80%
1,00%
1,20%
1,40%
1,60%
1,80%
0 100 200 300 400 500 600 700 800 900
Uniformity %
Vout (V)
Uniformity
(-30 to 60 C° RLoad = 17 MΩ)
-0,06%
-0,05%
-0,04%
-0,03%
-0,02%
-0,01%
0,00%
0,01%
0,02%
0,03%
0,04%
-80 -60 -40 -20 0 20 40 60 80
Temperature (C°)
Integral Non Linearity (Vout vs Vset )
INL (Max)
INL (Min)

CAEN
Electronic Instrumentation
UM6026 - A7508 User Manual Rev. 1
8
Fig. 8: Offset current Vs, Vout and Temperature
Vset / Vout and Vmon / Vout Coefficent (-45 C° to +65 C°)
Model
A7508P
A7508N
Vout/ Vset
402
402
Accuracy: ± 1% 200< Vout < 500V
± 0.5% Vout > 500 V
Vout / Vmon
402
402
Accuracy: ± 0.8% 150< Vout < 500V
± 0.6% Vout > 500 V
Tab. 3: Table of Vset / Vout and Vmon / Vout coefficent
Iset / Iout and Imon / Iout Coefficent (-45 C° to +65 C°)
Model
A7508P
A7508N
Iset / Imax out
25(*)
25(*)
Accuracy: ± 5% Vout > 400 V
Stability: ± 3% Vout > 400 V
Imon / Iout
25(*)
25(*)
Accuracy: ± 5% Vout > 400 V
Stability: ± 3% Vout > 400 V
Tab. 4: Table of Iset / Imax out and Imon / Iout coefficent
(*) Iset and Imon expressed in V, Imax out and Iout expressed in µA. N.B.: In parallel to the load we have a small resistor for the voltage
feedback; therefore, a small offset current is introduced (see figure 8).
0,05
0,55
1,05
1,55
2,05
2,55
0 200 400 600 800 1000
µA
Vout (V)
Offset Current vs Vout and Temperature
-30 C°
0 C°
30 C°
60 C°

CAEN
Electronic Instrumentation
UM6026 - A7508 User Manual Rev. 1
9
3Packaging
Fig. 9: A7508 External packaging (all dimension in mm)
External Connection
The following diagram describes the Pin assignment:
Pin #
Description
Direction
P1
Enable (on >+3.5V)
In
P2
OVC Status
Out
P3
Vmon
Out
P4
Vset
In
P5
Iset
In
P6
Imon
Out
P7
+5V (±5%) Input
In
P8
RTN ground - shield
P9
HV Output
Out
Fig. 10: A7508 pins position (bottom view)

CAEN
Tools for Discovery
n
Electronic Instrumentation
CAEN SpA is acknowledged as the only company in the world providing a complete range of High/Low Voltage Power Supply
systems and Front-End/Data Acquisition modules which meet IEEE Standards for Nuclear and Particle Physics. Extensive
Research and Development capabilities have allowed CAEN SpA to play an important, long term role in this field. Our
activities have always been at the forefront of technology, thanks to years of intensive collaborations with the most
important Research Centres of the world. Our products appeal to a wide range of customers including engineers, scientists
and technical professionals who all trust them to help achieve their goals faster and more effectively.
CAEN S.p.A.
CAEN GmbH
CAEN Technologies, Inc.
Via Vetraia, 11
Klingenstraße 108
1140 Bay Street - Suite 2 C
55049 Viareggio
D-42651 Solingen
Staten Island, NY 10305
Italy
Germany
USA
Tel. [phone]
Phone [phone]
Tel. [phone]
Fax [phone]
Fax [phone]
Fax [phone]
[email protected]
Mobile [phone]
[e-mail]
www.caen.it
[email protected]
www.caentechnologies.com
www.caen-de.com
CAEN
Tools for Discovery
Electronic Instrumentation
User Manual - A7508 rev. 1 - 29 May 2017
00106/16:A7508.MUTx
Copyright © CAEN SpA. All rights reserved. Information in this publication supersedes all earlier versions. Specifications subject to change without notice.