MODEL: 20VS4-384
Hybrid IC Isolation Amplifiers 20 Series
ISOLATION AMPLIFIER(5 kV input isolation)
Functions & Features• Being used for printed wiring board installation• Up to 5 kV isolation between input to output or powerinput• High CMRR
• Small installation area in printed wiring board• Gain adjustable range, × 1 to × 10
• Power 15 V DC
Typical Applications• Isolating the field and iput circuit of microprocessor toreduce noise from field• Available for manufacturers of small-lot products to omit
the development of isolation circuit38 (1.50)

15.2 (.60)
38 (1.50)

Input offset voltage: ±15 mV
Input bias current: 0.5 nA TYP. (@25°C)

OUTPUT SPECIFICATIONS■ DC Voltage: -5 – +5 V DC
Load resistance: ≥ 2 kΩ
Output impedance: ≤ 1 Ω

REFERENCE VOLTAGE SOURCE
Output voltage:±7.5 V DC TYP. (+15 V power supply)±7.0 V DC TYP. (+14 V power supply)
Load current: ≤ 5 mA

INSTALLATIONPower input•DC:
Operational voltage range 13 – 16 V;
ripple 2 %p-p max.; approx. 7 mA with no load
Operating temperature: -10 to +70°C (14 to 158°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Mounting: Soldering to the printed wiring board
Weight: 20 g (0.71 oz)

mm (inch)

PERFORMANCE in percentage of span
Linearity: ±0.05 %Temp. coefficient:
Offset drift 10 ppm/°C TYP. @G = 1 (20 ppm/°C max.)
span drift 20 ppm/°C TYP. @G = 1 (50 ppm/°C max.)
Frequency characteristics: Approx. 1 kHz, -3 dB
Response time: ≤ 450 μsec. (0 – 90 %)Conversion gain: ×1 ±1 %Gain adjustable range: × 1 to × 10
Line voltage effect: ±0.1 % over voltage range
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 5000 V AC @3 minute (input orreference voltage source to output or power)
CMRR: 114 dB TYP. (500 V AC 50/60 Hz)

MODEL: 20VS4–384–U
ORDERING INFORMATION• Code number: 20VS4-384-U
INPUT RANGE -5 – +5 V DC
OUTPUT RANGE -5 – +5 V DC

POWER INPUTDC Power
U: 15 V DC

GENERAL SPECIFICATIONS
Construction: Hybrid IC
Housing material: Flame-resistant resin (black)
Isolation: Input to output or power

INPUT SPECIFICATIONS■ DC Voltage
Input : -5 – +5 V DC
Input resistance: ≥ 1 MΩ (10 kΩ in power failure)
Overload input voltage: 240 V AC continuous
20VS4-384 SPECIFICATIONS

MG CO., LTD.
www.mgco.jp

ES-4415 Rev.2 Page 1/4

MODEL: 20VS4-384
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
38 (1.50)

10.16 10.16(.40) (.40)
5.08 (.20)

2.54 (.10)
2.54 (.10)

3.76 (.15)

3.76 (.15)

OUTPUT (+)

10OUTPUT (–)

9POWER (–)

8POWER (+)

76SHIELD

5NON-INVERTING INPUT4REFERENCE VOLTAGE SOURCE (–)

3REFERENCE VOLTAGE SOURCE (+)
INVERTING INPUT
COM (–)

21(BOTTOM VIEW)

10 (.39)15.2 (.60)

3.76 (.15) 5.08(.20)

15.24(.60)

38 (1.50)

5.08(.20)

PIN ASSIGNMENT

5.08 (.20)
30.48 (1.2)

1.0 dia.

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAMSHIELD
NON-INVERTING INPUT 5
INPUT

320kΩ

INVERTING INPUT 210.7kΩ

Isolation＋Output
Driver−10 +OUTPUT

9 –

100kΩ

17 +SHIELD 68 –COM (–)

POWER SUPPLY(+) 3REFERENCE VOLTAGE SOURCE(–) 4Note. The reference voltage source is common to the COM (–).

APPLICATION EXAMPLE■ Non-inverting amplifier circuit: Basic example of G = 110.7kΩ 100kΩ

2––+5+10 ++OUTPUT ±5V DC

INPUT ±5V DC–REFERENCE
VOLTAGE SOURCE

19 –+ 37 +– 48 –POWER 15V DC

Non-inverting circuit G = 1

20VS4-384 SPECIFICATIONS

MG CO., LTD.
www.mgco.jp

ES-4415 Rev.2 Page 2/4

MODEL: 20VS4-384■ Inverting amplifier circuit: Basic example of G = -1 (output inverted to the input)
R1+10.7kΩ 100kΩ

89.3kΩ

2––INPUT ±5V DC

5–+10 ++OUTPUT ±5V DC

19 –+ 37 +– 4

8 –POWER 15V DC

REFERENCE VOLTAGE SOURCEInverting circuit G = -1

■ Non-inverting amplifier circuit: Example of G = 1 + 100kΩ / (10.7kΩ + R1)
R1

10.7kΩ 100kΩ

2––+10 +++5–

1

9 –+ 37 +– 48 –OUTPUT VO

INPUT VIN

POWER SUPPLY 15V DC

REFERENCE VOLTAGE SOURCE

Non-inverting amplifier circuit G = 1 + 100kΩ / (10.7kΩ + R1)■ Inverting amplifier circuit: Example of G = -100kΩ / (10.7kΩ + R2) (output inverted to the input, G: -0.5 to -9.3)
R2

10.7kΩ 100kΩ+2––

INPUT VIN

5–+10 ++OUTPUT VO

9 –

1+ 3

7 + POWER SUPPLY– 48 –REFERENCE VOLTAGE SOURCE

15V DC

Inverting amplifier circuit G = -100kΩ / (10.7kΩ + R2)■ Non-inverting amplifier's circuit with external adjustments: Example of G = 2(SPAN)85kΩ

10.7kΩ 100kΩ

210kΩ––+5INPUT ±2.5V DC200Ω–30kΩ

50kΩ(ZERO)+10 ++OUTPUT ±5V DC

19 –3 + REFERENCE

7 +VOLTAGE
4 – SOURCE

8 –POWER SUPPLY 15V DC

Non-inverting amplifier circuit zero/span adjustments (input ±2.5V, output ±5V)

20VS4-384 SPECIFICATIONS

MG CO., LTD.
www.mgco.jpES-4415 Rev.2 Page 3/4

MODEL: 20VS4-384■ Inverting amplifier's circuit with external adjustments: Example of G = -1 (output inverted to the input)(SPAN)
85kΩ

10.7kΩ 100kΩ+210kΩ––INPUT ±5V DC

5–100kΩ(ZERO)

200Ω
30kΩ+10 ++OUTPUT ±5V DC

19 –3 + REFERENCE

7 +VOLTAGE
4 – SOURCE8 –POWER 15V DC

Inverting amplifier circuit zero/span adjustments (input ±5V, output ±5V)

■ Non-inverting amplifier circuit: Example of ±10V DC output (±10V DC to the input ±5V DC)+15V
10.7kΩ 100kΩ

2–––+5+R3+–15V

INPUT ±5V DC–

19+ 37++10OUTPUT ±10V DC
R3−+REFERENCE VOLTAGE SOURCE– 48POWER 15V DC–Non-inverting circuit G = 1 + R3 / R3 =2■ Inverting amplifier circuit: Example of ±10V DC output (output inverted to the input)+15V
R1+10.7kΩ 100kΩ

89.3kΩ

2–INPUT ±5V DC

5–––+10+R3-15V

91++OUTPUT ±10V DC
R3–+ 37 +REFERENCE VOLTAGE SOURCE– 4

POWER 15V DC

8 –Inverting circuit G = -(1 + R3 / R3) = -2
Shield Cable Wiring
SHIELD+SHIELD

5INPUT

2R1–

16Specifications are subject to change without notice.

20VS4-384 SPECIFICATIONS

MG CO., LTD.
www.mgco.jpES-4415 Rev.2 Page 4/4