ES-4421 Rev.1

20VS1A

Hybrid IC Isolation Amplifiers 20 Series

ISOLATION AMPLIFIER

(high speed response, 3-port isolation)
Functions & Features
• Being used for printed wiring board installation
• High-linearity
• High speed response 50 μsec.
• Isolating between input, output and power
• Isolation between input, output and power supply up to 3000 V AC
• Power 15 V DC
Typical Applications
• Galvanically isolating the I/O circuits of microprocessor from the field side to reduce external noise
• Enabling electronic manufacturers to save efforts and cost for the development of isolation circuits for small-lot products

MODEL: 20VS1A–4W4W[1]–U

ORDERING INFORMATION

• Code number: 20VS1A-4W4W[1]-U
Specify a code from below for [1].
(e.g. 20VS1A-4W4WA-U)

INPUT / OUTPUT

4W4W: -10 - +10 V DC (Input resistance 1 MΩ min.)
/ -10 - +10 V DC (Load resistance 2 kΩ min.)

[1] LINEARITY

A: ±0.025 %
B: ±0.012 %
C: ±0.008 %

POWER INPUT

DC Power
U: 15 V DC

GENERAL SPECIFICATIONS

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

INPUT SPECIFICATIONS

■ DC Voltage
Input : -10 – +10 V DC
Input resistance: ≥ 1 MΩ (10 kΩ in power failure)
Overload input voltage: ±15 V DC continuous
Input offset voltage: ±2 mV @ G = 1
Input bias current: 25 pA TYP. (@25°C)

OUTPUT SPECIFICATIONS

■ DC Voltage: -10 – +10 V DC
Load resistance: ≥ 2 kΩ
Output impedance: ≤ 1 Ω

REFERENCE VOLTAGE SOURCE

■ FOR INPUT
Output voltage: ±16.5 V DC ±2.5 V (when power supply is 15 V DC)
Load current: ≤ 2 mA
■ FOR OUTPUT
Output voltage: ±16.5 V DC ±2.5 V (when power supply is 15 V DC)
Load current: ≤ 2 mA

INSTALLATION

Power input
•DC: Rating ±5 %; approx. 50 mA with no load
Operating temperature: -25 to +85°C (-13 to +185°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Mounting: Soldering to the printed wiring board
Weight: 20 g (0.71 oz)

PERFORMANCE in percentage of span

Unless otherwise specified, G = 1.
Linearity:
±0.025 % (20VS1A-4W4WA)
±0.012 % (20VS1A-4W4WB)
±0.008 % (20VS1A-4W4WC)
Temp. coefficient:
±25 ppm/°C (0℃ - 70℃; 32 - 158°F)
±50 ppm/°C (-25℃ - +85℃; -13 - +185°F)
Frequency characteristics: Approx. 20 kHz, -3 dB
Response time: ≤ 50 μsec. (0 – 90 %)
Conversion gain: ×1 ±1.5 %
Gain adjustable range: × 1 to × 100
Line voltage effect: ±0.01 % over voltage range
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 3000 V AC @1 minute (input or reference voltage source for input to output or reference voltage source for output to power)
CMRR: ≥ 120 dB (500 V AC 50/60 Hz)

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

APPLICATION EXAMPLE

10 kΩ ≤ (R₁ + R₂) ≤ 200 kΩ