TRANSIMPEDANCE AMPLIFIER

IV-202F4 / IV-204F3
INSTRUCTION MANUALNF Corporation

――― Preface ―――
Thank you for purchasing the IV-200 series transimpedance amplifier.
Please read the "Safety Information" on the next page first to ensure the product is used in acorrect and safe manner.
● Alert symbols in this manualThis manual uses the following alert symbols. The instructions next to these symbols must be
carefully obeyed to ensure the equipment operator’s safety and prevent damage to equipment.

WARNING
This contains information for avoiding electric shock and other risks when handlingthe equipment that could result in death or bodily injury to the operator.
CAUTION
This contains information for avoiding risks when handling the equipment that could
result in minor or moderate injury to the operator or damage to property.

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Safety Information────────To ensure safe use, be sure to observe the following safety precautions.
NF Corporation shall not be held liable for damages that arise from a failure to observe these safety
precautions or warnings or cautions in the instruction manual.

 Be sure to observe the information of the instruction manual.
The instruction manual contains information for the safe operation of the product.
Be sure to read the information first before using the product.
All the warnings in the instruction manual are intended for preventing risks that may lead to serious
accidents. Ensure to obey them.

 Be sure to ground the product.
To prevent electric shock, the enclosure must be connected to an electrical ground.

 Check the power supply voltage.
This product operates on the power supply voltage indicated in the instruction manual.
Prior to connecting the power supply, check that the voltage of the power supply matches the rated
power supply of the product.

 If you notice anything strange
If this product emits smoke, an unusual smell, or abnormal noise, immediately power it off and stopusing it.
If such an anomaly occurs, prevent anyone from using this product until it has been repaired, andimmediately report the problem to NF Corporation or one of our representatives.

 Do not operate in an explosive atmosphere.
An explosion or other such hazard may result.

 Do not remove the cover.
The product may contain high-voltage parts. Never remove the cover.
Even when the inside of this product needs to be inspected, do not touch the inside. All suchinspections are to be performed by service technicians designated by NF Corporation.

 Do not modify the product.
Never modify the product. Modification to the product may pose a new risk. We may refuse therepair of a modified product.

 Ensure that water does not get into this product.
Using the product in wet condition may cause electric shock and fire. When water etc. get into theproduct, immediately power it off, and contact NF Corporation or one of our representatives.

 If lightning occurs, power off and disconnect this product.
A lightning may cause an electric shock, a fire and a failure.
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Safety Information

 Electromagnetic compatibility
This product is a CISPR 11 Group 1 Class A compliant device. This product may cause interference
if used in residential areas. Such use must be avoided unless the user takes special measures to reduce
electromagnetic emissions to prevent interference to the reception of radio and television broadcasts.

● Safety symbols
Caution, refer to instruction manualThis notifies the user of potential hazards and indicates that he/she must refer to theinstruction manual.
Caution, possibility of electric shock
This indicates that an electric shock may occur under specific conditions.
Protective earth ground terminal
This indicates that the terminal needs to be grounded in order to prevent electric shock
accidents.
Before operating the product, ensure to connect this terminal to an earth ground.

WARNING

Warning
This contains information to avoid risks in equipment handling that could resultin loss of life or bodily injury.

CAUTION

CautionThis contains information to avoid risks in equipment handling that could resultin minor or moderate injury to person or damage to property or the equipment.

● Other symbols
This indicates that the terminal or the outer conductor of the connector is connected to theenclosure.
This indicates that the terminal or the outer conductor of the connector is connected to thesignal ground.
This indicates that the terminal or the outer conductor of the connector is isolated from theenclosure.
It indicates, however, that the difference of the potential from the ground potential isrestricted to 42 Vpk or less for safety (this product is used grounded so the enclosure
potential and ground potential are equal).

 Waste disposal
This product does not include batteries and is designed in accordance with the RoHS Directive (EU).
Dispose of the product in accordance with the laws and regulations of the area where you use it.
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1. Before Using Product1. Before Using Product1.1 About Power Connection
1.1.1 Connecting to Dedicated LP Series Power Supply
To obtain the best noise characteristics, we recommend the dedicated low noise DC power supply
LP series.
To connect this product to this series of power supply, use the “Output cable D” (PA-001-3029)
as shown below.

Main unit

LP series power supply(±15V)

Figure 1-1 Connecting to LP series power supply

ConvexConcave

Figure 1-2 Pin assignment

Attention
 This product will be damaged by reversely connecting the power supply. Supplying a voltage
greater than ± 16.5 V will damage the internal circuits of this product.
 There are concave and convex parts for the power connector, as shown in Figure 1-2, to prevent thewrong connection. If the orientation of the connector is correct, excessive force is not required.
Please be careful of the orientation of the connector.
 Securely connect the cable to the power connector of the main unit.

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1. Before Using Product1.1.2 Connecting to Power Supply other than LP Series
To connect this product to a power supply other than one of the LP series, use the supplied power
supply cable as shown below.
Connect the connector of the cable to the power connector of the main unit.
Connect the split end of the power supply cable to the ±15 V power supply(split end: red to +15 V, black to GND, blue to -15 V).

Main unit

Power supply (±15V)

Power supply cable (supplied)Figure 1-3 Connecting to power supply other than LP series

ConvexConcave

Figure 1-4 Pin assignment

Attention
 This product will be damaged by reversely connecting the power supply. Supplying a voltage
greater than ± 16.5 V will damage the internal circuits of this product.
 There are concave and convex parts in the power connector, as shown in Figure 1-4, to prevent thewrong connection. If the orientation of the connector is correct, excessive force is not required.
Please be careful of the orientation of the connector.
 Securely connect the cable to the power connector of the main unit.
 This product does not operate on a single power supply (+30 V / GND). Be sure to use a dual
power supply (+15 V / GND / −15 V).

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1. Before Using Product1.2 Signal Input and Output Connection
An SMB connector is used for signal input and output. However, there is a restriction in theconnector portion due to the product’s outer shape. Use a connector with an external diameter of
φ6.2 mm or smaller for connection.
If a large parallel capacitance is connected to the input of this product, overshooting, ringing, oroscillation may occur. Make the input wiring as short as possible. We recommend 50-Ω coaxial
cables with lengths of approximately 10 cm and 40 cm for the IV-202F4 and IV-204F3,respectively.
The absolute maximum rating of the input current is ±20 mA. Be aware of this value to avoid
causing damage.
Be careful of input short-circuits that could damage devices connected to the output.
1.3 Adjuster for Frequency Response (FREQ ADJ)
If a large input parallel capacitance ※1-1 is connected to this product, overshooting, ringing, oroscillation may occur. In this case, the FREQ ADJ adjuster may be able to improve measurement
stability.
To compensate for input parallel capacitance, make adjustments by turning the adjuster clockwise.
However, the upper cut-off frequency becomes lower as you turn the adjuster clockwise.
※1-1：Approximately 20 pF or higher (IV-202F4). Approximately 50 pF or higher (IV-204F3).

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2. Reference Data
2. Reference Data
This chapter provides reference data. Although the performance of this product may not achieve
the level of these data, please understand that each item of all products has been strictly tested andconfirmed to meet the specifications before shipment.
2.1 Frequency Characteristics
The frequency characteristics shown below represent the gain based on 10 kHz.
10100dB＝4MV/A0dB＝100kV/A
00-10Gain[dB]

遮断周波数＝fc 13MHz-20-30-40-40-50

遮断周波数＝1.5MHz
fc＝-20-30-50
110100

1k10k100k

1M

10M100M

110100Frequency[Hz]

1k10k

100k

1M10M

Frequency[Hz]Figure 2-1 Frequency characteristic (IV-202F4)

Figure 2-2 Frequency characteristic (IV-204F3)

2.2 Equivalent Input Noise Current Density
The characteristics shown below are calculated by dividing the output noise voltage density by
the current gain.
100p

10p

√Hz] [A/√Hz][V/density
Equivalent input雑音電流密度noise current√Hz] [A/√Hz][V/density
Equivalent input雑音電流密度
noise current

Gain[dB]-1010p450fA/√Hz typ. @10kHz
1p

100f

10f

1p70fA/√Hz typ. @1kHz
100f

10f

1f
10100

1k

10k
Frequency[Hz]

100k

1M

10M

Figure 2-3 Noise characteristic (IV-202F4)DA00062341-002

10100

1k
10k
Frequency[Hz]100k

Figure 2-4 Noise characteristic (IV-204F3)

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1M

3. Specifications
3. Specifications
3.1 Overview
The IV-202F4 and IV-204F3 are compact current-to-voltage conversion amplifiers with low noisecharacteristics. Wide bandwidths of up to 10 MHz and 1 MHz are realized for the IV-202F4 andIV-204F3, respectively.
These products stably operate for up to an input parallel capacitance of approximately 20 pF(IV-202F4) or 50 pF (IV-204F3) without adjustment.
3.2 Configuration
Main unit
Power supply cable
Instruction manual

×1×1
×1

3.3 Absolute Maximum Rating
Power supply voltage± 18 V(± VS)
Input current± 20 mA
3.4 Electrical Characteristics
Unless otherwise specified, power supply voltage Vs = ± 15 V, temperature 23 ± 5 °C, and input
parallel capacitance Cs = 5 pF.
3.4.1 Input Section
Item/Model
Input form
Input impedance
Input bias current
Maximum input current
Equivalent input noise
current density
Equivalent input noise current

IV-202F4
IV-204F3
DC coupling unbalanced single ended input
30 Ω or lower
1.2 kΩ or lower
5 pA typical±100 μA±2.5 μA
600 fA/ Hz or lower 90 fA/ Hz or lower
450 fA/ Hz typical
70 fA/ Hz typical

Recommended signal
source impedance

20 nArms
or lower typical
25 kΩ or higher,
20 pF or lower

3.4.2 Output Section
Item/Model
Output form
Phase between input and output
Output impedance
Maximum output voltage
Maximum output current
Output offset voltage

IV-202F4IV-204F3
DC coupling unbalanced single ended output
Inverting
50 Ω ± 10 %±10 V±5 mA±10 mV

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1.1 nArms
or lower typical
1 MΩ or higher,
50 pF or lower

Note
SMB connector (male)at DC——
Input opened
IV-202F4: at 10 kHz
IV-204F3: at 1 kHz
Input opened
BW: 3 Hz to 20 MHz—Note
SMB connector (male)————
Input opened

IV-202F4 / IV-204F3

3. Specifications
3.4.3 Amplifier Section
Item/Model

IV-202F4IV-204F3Note

56Gain1 × 10 V/A ± 5%

4 × 10 V/A ± 5%—Frequency bandwidth

DC to 10 MHz

DC to 1 MHz

Based on 10 kHz+1 to −3 dB

3.5 Power Supply
Item/Model
Operating supply voltage range
Consumption currentConnector

IV-202F4
IV-204F3±15 ± 1 V
±40 mA or lower±25 mA typical
DF11-4DP-2DS(52) , 4 pins, maleby Hirose Electric Co., Ltd.

Note—
No signal
Vs = ± 15 V—

Pin Assignment
Pin number

1234Function+Vs

GND

GND−Vs3412Figure 3-1 Pin assignment diagram
3.6 General
Performance guarantee temperature range
Operating temperature and humidity ranges
Storage temperature and humidity ranges
External dimensions
WeightRoHS

23 ± 5°C
0 to 40°C, 10 to 90 %RH (non-condensation)−10 to 60°C, 10 to 80 %RH (non-condensation)
80 × 15 × 21 mm (without protrusions)
Approximately 25 g
Directive 2011/65/EU

3.7 Adjuster for Frequency Response (FREQ ADJ)
If a large input parallel capacitance *3-1 is connected to this product, overshooting, ringing, oroscillation may occur. In this case, the FREQ ADJ adjuster may be able to improve measurement
stability.
To compensate for input parallel capacitance, make adjustments by turning the adjuster clockwise.
However, the upper cut-off frequency becomes lower as you turn the adjuster clockwise.
* 3-1: approximately 20 pF or higher (IV-202F4). Approximately 50 pF or higher (IV-204F3).

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3. Specifications
3.8 Power Supply Cable (Supplied)
Length (including connector)
IV-202F4/IV-204F3 side

Approximately 50 cm
DF11-4DS-2C(52), 4 pins, female
Hirose Electric Co., Ltd.
Split end, 4 wires (0.2 mm2)
Red to +Vs, Blue to −Vs, Black (2 lines) to GND

Power supply side

3.9 External View

Adjuster for frequency response

Input connector

Output connector

Power supply connector
Material and Surface Treatment
Panel: Aluminum, Alumite treatment
Case: Aluminum, non-chromium chemical conversion coating

Unit: mm

* For the SMB connector used as the input and output connector, use a connector with a diameterof φ6.2 mm or smaller.
* The external view shown above is that of the IV-202F4. The external dimensions of the IV-204F3
are the same; only the model name is different.
Figure 3-2 External view

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3. Specifications
3.10 Block Diagram

Figure 3-3 Block Diagram

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ーーーー WARRANTY ーーーー
The NF Corporation certifies that this product was thoroughly tested and inspected and foundto meet its published specifications when it was shipped from our factory.
All NF products are warranted against defects in materials and workmanship for a period of oneyear from the date of shipment. During the warranty period, NF will repair a defective productwithout any charge for the parts and labor. For repair service under warranty, the product must bereturned to either NF or an agent designated by NF. The purchaser shall prepay all shipping
charges, duties, and taxes for the product to either NF or an agent from another country, and theshipping charge for returning the product to the purchaser shall be paid by NF.
This warranty shall not apply to any defect, failure, or damage caused by a) improper use; b)
improper or inadequate maintenance and care; or c) modifications made by the purchaser orpersonnel other than NF representatives.

If there are any misplaced or missing pages, we will replace the manual. Please contact a sales
representative.

NOTES
 Reproduction of the contents of this manual is forbidden by applicable laws.
 The contents of this manual may be revised without notice.
 Information provided in this manual is intended to be accurate and reliable. However, we
assume no responsibility for any damage regarding the contents of this manual.
 We assume no responsibility for influences resulting from the operations in this manual.

Copyright 2017, NF Corporation

IV-202F4/IV-204F3 INSTRUCTION MANUALNF Corporation
6-3-20, Tsunashima Higashi, Kohoku-ku, Yokohama223-8508 JAPAN
Phone: +81-45-545-8111

Fax: +81-45-545-8191

http://www.nfcorp.co.jp/

NF Corporation
6-3-20, Tsunashima Higashi, Kohoku-ku, Yokohama 223-8508 JAPAN