Datasheet

DHPVA-201
Variable Gain
200 MHz Wideband Voltage Amplifier

Features

Variable gain 10 to 60 dB (x3 to x1,000), switchable in 10 dB steps
Bandwidth DC ... 200 MHz, switchable to 20 MHz
Built-in temperature compensation for low offset drift of 0.3 µV/°C
2.3 nV/√√Hz input noise
Switchable AC/DC-coupling
Bandwidth, frequency- and pulse response independent of gain setting
Local and remote control
DC monitor output

Applications

Oscilloscope and transient-recorder preamplifier
Photomultiplier and microchannel-plate amplifier
Signal-booster for optical receivers and current amplifiers
Time-resolved pulse and transient measurements
Automated measurement systems
Integration in compact systems

Block Diagram
Programmable
AC / DC Coupling

INPUT

Low Noise,Low Drift
Input Stage

Programmable
Lowpass-Filter
f-3dB = 20/200 MHz

5 Programmable
Amplifier Stages

OUTPUT

10 dB
0 dB / 10 dB per Stage

Monitor Output
Buffer

Lowpass-Filter
f-3dB = 100 kHz

Parameter Control Unit

POWER
SUPPLYSupplyVoltage
Regulator
IN (+/-15V)
Optocoupler
Isolate Unit

ManualSwitch

OFFSET ADJUSTINPUT / TRIMMERDC MONITOROUTPUT

DIG. CONTROLINPUTSOUT (+/-12V, +5V)

POWER SUPPLYOUTPUT
BS01-0541-18

SOPHISTICATED TOOLS FOR SIGNAL RECOVERY
DE-DHPVA-201_R1/TB,KJ,MvB,JM/15DEC2016

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Datasheet

DHPVA-201
Variable Gain
200 MHz Wideband Voltage Amplifier

Specifications

Test conditions

VS = ±15 V, TA = 25 °C, system impedance = 50 Ω

Gain

Gain values
Gain accuracy

10, 20, 30, 40, 50, 60 dB, switchable±0.15 dB

Frequency Response

Lower cut-off frequency
Upper cut-off frequency

DC / 10 Hz, switchable
200 MHz, switchable to 20 MHz (approx. Bessel filtercharacteristic for clean pulse response)
see frequency response diagram (page 4)

Upper cut-off frequency roll-off
Time Response

Rise/fall time (10 % - 90 %)1.8 ns
18 nsInput

Input impedance
Input return loss S1150 Ω–31 dB @ 100 MHz–22 dB @ 200 MHz–10 dB @ 400 MHz
0.3 µV/°C
2.3 nV/√Hz (@ 30 - 60 dB gain)
3.0 pA/√Hz
20 kHz<200 nA–10 mV ... +10 mV, adjustable by offset- potentiometerand external control voltage

Input voltage drift
Equivalent input voltage noise
Equivalent input current noise
1/f-noise corner
Input bias current
Input offset voltage

OutputOutput impedance
Output return loss S22(@ 200 MHz)(@ 20 MHz)

Output voltage range
Output power (max.)
Output current (max.)
THD

50 Ω (terminate with 50 Ω load for best performance)–35 dB @ 100 MHz–30 dB @ 200 MHz–25 dB @ 400 MHz
2 VPP(for linear amplification)+10 dBm
70 mA<0.5 %(@ 20 MHz, 1 VPP)

Monitor Output

Monitor output gain
Monitor output voltage range
Monitor output current
Monitor output bandwidthMonitor output impedancex1 (@ ≥1 MΩ load)±5 V±10 mA
DC ... 100 kHz
50 Ω(designed for ≥ 1 MΩ load)

Indicator LED

Functiongain setting

Digital Control

Control input voltage range
Control input current
Gain control switching time

Low: –0.8 ... +0.8 V
High: +1.8 ... +12 V, TTL / CMOS compatible
0 mA @ 0 V, 1.5 mA @ +5 V, 4.5 mA @ +12 V
5 ms

Ext. Offset Control

Control voltage range
Offset control input impedance±10 V, corresponds to ±10 mV input offset
20 kΩ

Power Supply

Supply voltage
Supply current±15 V±120 mA typ. (depends on operating conditions)±400 mA max.

Stabilized power supply output±12 V / max. 50 mA, +5V / max. 50 mA

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Datasheet

DHPVA-201
Variable Gain
200 MHz Wideband Voltage Amplifier

Specifications (continued)
Case

WeightMaterial

560 g (1.24 lb)
AlMg4.5Mn, nickel-plated

Temperature Range

Storage temperature
Operating temperature–40 °C ... +85 °C
0 °C ... +50 °C

Absolute Maximum Ratings

Power supply voltage
Signal input voltage
Digital control input voltage±16.5 V
±5 V
+16 V / –5 VConnectors

Input

BNC jack (female)

Output

BNC jack (female)Power supply

Lemo series 1S, 3-pin fixed socket(mating plug type: FFA.1S.303.CLAC52)®

Pin 1:Pin 2:Pin 3:

Control port

+15 V
– 15 V
GND

Sub-D 25-pin, female, qual. class 2
Pin 1:+12 V (stabilized power supply output)
Pin 2:– 12 V (stabilized power supply output)
Pin 3:
AGND (analog ground)Pin 4:+5 V (stabilized power supply output)
Pin 5:
monitor outputPin 6, 7:
NC
Pin 8:
offset control voltage input
Pin 9:
DGND (ground f. digital control pin 10 - 25)
Pin 10:digital control input: gain, LSB
Pin 11:
digital control input: gain
Pin 12:
digital control input: gain, MSB
Pin 13:
digital control input: AC/DC
Pin 14:
digital control input: 200 MHz/20 MHz
Pin 15 - 25: NC

SOPHISTICATED TOOLS FOR SIGNAL RECOVERY
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Datasheet

DHPVA-201
Variable Gain
200 MHz Wideband Voltage Amplifier

Remote Control OperationGeneral

Gain setting

Remote control input bits are opto-isolated and connectedby logical OR to local switch setting. For remote controla switch setting, set the corresponding local switch to“Ext.”, “AC” or “20 MHz” and select the wanted setting
via a bit-code at the corresponding digital inputs. Mixed
operation, e.g. local gain setting and remote controlled
bandwidth setting is also possible.
Gain

Pin 10

Pin 11

Pin 12

AC/DC setting

10 dB
20 dB
30 dB
40 dB
50 dB
60 dB

low
high
low
high
low
high

Coupling

Pin 13lowlowhighhigh
low
low

low
low
low
lowhighhigh

Bandwidth settingACDClowhighBandwidth

Pin 14

20 MHz200 MHz
Frequency response (l( l ogarithmic)dB

Typical Performance
Characteristics

lowhigh

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Datasheet

DHPVA-201
Variable Gain
200 MHz Wideband Voltage Amplifier

Dimensions

157 mm
150 mm

15 mm

137 mmOUT

AC

20 MHzDCOffset

200 MHz

15 mm

44 mm

51 mm

105 mmIN

28.5 mm

2 mm

43.5 mm

27 mm

Ø 3.2 mm

DZ-DHPVA-201_R1

One or both heat sinks may be removed (two recessed head screws) if sufficient cooling of thecase is provided otherwise (< 2 K/W), for example by mounting the amplifier with good thermal
contact on a sufficiently large solid metal case/rack system..

FEMTO Messtechnik GmbHKlosterstr. 6410179 Berlin · Germany
Phone: +49 30 280 4711-0
Fax: +49 30 280 4711-11
Email: info@femto.de
www.femto.deSpecifications are subject to change without notice. Information provided herein is believed to be accurate andreliable. However, no responsibility is assumed by FEMTO Messtechnik GmbH for its use, nor for any infringementof patents or other rights of third parties which may result from its use. No license is granted by implication orotherwise under any patent or patent rights of FEMTO Messtechnik GmbH. Product names mentioned may also betrademarks used here for identification purposes only.
© by FEMTO Messtechnik GmbH · Printed in Germany

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