Caen A7502 User manual

CAEN
Tools for Discovery
n
Electronic Instrumentation
User Manual UM5555
A7502
2100V/100µA High Efficiency HV Power Supply (5V in)
Rev. 3 - 29 May 2017

Purpose of this Manual
This document is the A7502 User's Manual; it contains information about the installation, the configuration and the
use of the device.
Change Document Record
Date
Revision
Changes
19 October 2016
0
Initial release
27 October 2016
1
New characteristics graphics
7 April 2017
2
New Offset current Vs, Vout and Temperature graphic
29 May 2017
3
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 –2014
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
UM5555 –A7502 User Manual Rev. 3
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Index
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List of Figures
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List of Tables
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CAEN
Electronic Instrumentation
UM5555 –A7502 User Manual Rev. 3
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1Overview
The CAEN Mod. A7502 is a compact high efficiency power supply providing a programmable and monitorable output
voltage ranging from 0 to 2100 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 +2.5 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. A7502
Ordering Option
Board Models
Description
Product Code
A7502N
A7502N -2.1kV 100uA HV Power Supply Module (5V in)
WA7502NXAAAA
A7502P
A7502P +2.1kV 100uA HV Power Supply Module (5V in)
WA7502PXAAAA
Tab. 1: Table of models and related items

CAEN
Electronic Instrumentation
UM5555 - A7502 User Manual Rev. 3
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 ÷ ±2100 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 ÷ +2.5 V
Vset Input (positive analog command)
0 ÷ +2.5 V
Important!: Vset must not exceed 2.5 V (Vout is not limited)
Iset Input (positive analog command)
0 ÷ +2.5 V
Imon Output (positive analog monitor)1
0 ÷ +2.5 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)
100 µA @ ±2100 V
Power requirement
<500 mW;
@ 2100 V / 110 µA (Rload ≈ 20 MΩ)
Efficiency
50% @ Vout = 2100 V (-45° C ÷ +70° C)
Output Ripple (Full Load)
Typical 5mVpp; Maximum 10mVpp
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
< 0.6 %
Protection
Over current short circuit, sparks and humidity
Tab. 2: A7502 Technical Specifications
1
N.B.: In parallel to the load we have a 300 MΩresistor for the voltage feedback; therefore, the Imon current with load ∞ is Vout/300MΩ.

CAEN
Electronic Instrumentation
UM5555 –A7502 User Manual Rev. 3
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Fig. 2: Male strip header of A7502
Fig. 3: Efficiency vs Vout and Temperature
0%
10%
20%
30%
40%
50%
60%
0 500 1000 1500 2000 2500
Efficency (%)
Vout (V)
Efficiency (%) vs Vout and Temperature (RLoad = 20 MΩ)
-60 C°
-30 C°
0 C°
30 C°
60 C°

CAEN
Electronic Instrumentation
UM5555 - A7502 User Manual Rev. 3
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Fig. 4: Power consumptions @ 2100 V vs Temperature
Fig. 5: Temperature coefficient vs Vout
Fig. 6: Uniformity of a Lot (ΔVout/Vout)
-
0,10
0,20
0,30
0,40
0,50
0,60
-40 -20 0 20 40
Watt
Temperature (C°)
Power Consumptions vs Temperature and
RLoad
(Vout= 2100 V)
20 MΩ
500 MΩ
1800 MΩ
7
7,5
8
8,5
9
9,5
10
10,5
11
11,5
12
0 500 1000 1500 2000 2500
ppm/C°
Vout (V)
Temperature coefficent
(-60 to 60 C° RLoad = 20 MΩ)
0,00%
0,10%
0,20%
0,30%
0,40%
0,50%
0,60%
0 500 1000 1500 2000 2500
Uniformity %
Vout (V)
Uniformity
(-60 to 60 C° RLoad = 20 MΩ)

CAEN
Electronic Instrumentation
UM5555 –A7502 User Manual Rev. 3
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Fig. 7: Integral non-linearity (ΔVout/Vout)
Fig. 8: Offset current Vs, Vout and Temperature
-0,20%
-0,15%
-0,10%
-0,05%
0,00%
0,05%
0,10%
0,15%
0,20%
-80 -60 -40 -20 0 20 40 60 80
Temperature (C°)
Integral Non Linearity (Vout vs Vset )
INL (Max)
INL (Min)
0,05
0,55
1,05
1,55
2,05
2,55
3,05
3,55
4,05
0 500 1000 1500 2000 2500
µA
Vout (V)
Offset Current vs Vout and Temperature
-30 C°
0 C°
30 C°
60 C°

CAEN
Electronic Instrumentation
UM5555 - A7502 User Manual Rev. 3
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Vset / Vout and Vmon / Vout Coefficent (-45 C° to +65 C°)
Model
A7502P
A7502N
Vout/ Vset
824
824
Accuracy: ± 1% 400< Vout < 1000V
± 0.5% Vout > 1000 V
Vout / Vmon
824
824
Accuracy: ± 0.8% 250< Vout < 1000V
± 0.6% Vout > 1000 V
Tab. 3: Table of Vset / Vout and Vmon / Vout coefficent
Example A7502P: if Vset = 2 V, then HV Output = 1648 V ± 8 V
Example A7502P: if Vmon = 1.5 V, then HV Output = 1236 V ± 5 V
Iset / Iout and Imon / Iout Coefficent (-45 C° to +65 C°)
Model
A7502P
A7502N
Iset / Imax out
45(*)
46.5(*)
Accuracy: ± 10% Vout > 800 V
Stability: ± 6% Vout > 800 V
Imon / Iout
45(*)
46.5(*)
Accuracy: ± 10% Vout > 800 V
Stability: ± 6% Vout > 800 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 300 MΩ resistor for the voltage
feedback; therefore the Imon current with load ∞ is Vout/300MΩ
Example A7502P: if Iset = 2 V, then Imax out = 90 µA ± 22 µA
Example A7502P: if Imon = 1 V, then Iout = 45 µA ± 18 µA

CAEN
Electronic Instrumentation
UM5555 –A7502 User Manual Rev. 3
10
3Packaging
Fig. 9: A7502 External packaging
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
Imon2
Out
P7
+5V (±5%) Input
In
P8
RTN ground - shield
P9
HV Output
Out
Fig. 10: A7502 pins position (bottom view)
2
It is necessary to add a regulation current proportional to the operation voltage; the regulation current I equal to Vout/300 MOhm