AMC1100 Fully-Differential Isolation Amplifier

1 Features

±250-mV input voltage range optimized for shunt resistors
Very low nonlinearity: 0.075% max at 5 V
Low offset error: 1.5 mV max
Low noise: 3.1 mV_RMS typ
Low high-side supply current:
8 mA max at 5 V
Input bandwidth: 60 kHz min
Fixed gain: 8 (0.5% Accuracy)
High common-mode rejection ratio: 108 dB
Low-side operation: 3.3 V
Safety-related certifications:
- 4250-V_PK basic isolation per
  DIN VDE V 0884-11: 2017-01
- 3005-V_RMS isolation for 1 minute per UL1577
- CAN/CSA no. 5A-component acceptance service notice and DIN EN 61010-1 standard
- Working voltage: 1200 V_PEAK
- Transient immunity: 2.5 kV/µs min
Fully specified over the extended industrial temperature range

2 Applications

Shunt resistor based current sensing in:

Electricity meters
String inverters
Power measurement applications

3 Description

The AMC1100 is a precision isolation amplifier with an output separated from the input circuitry by a silicon dioxide (SiO₂) barrier that is highly resistant to magnetic interference. This barrier is certified to provide galvanic isolation of up to 4250 V_PEAK, according to DIN VDE V 0884-11: 2017-01 and UL1577. Used in conjunction with isolated power supplies, this device prevents noise currents on a high common-mode voltage line from entering the local ground and interfering with or damaging sensitive circuitry.

The AMC1100 input is optimized for direct connection to shunt resistors or other low voltage level signal sources. The excellent performance of the device enables accurate current and voltage measurement in energy-metering applications. The output signal common-mode voltage is automatically adjusted to either the 3-V or 5-V low-side supply.

The AMC1100 is fully specified over the extended industrial temperature range of –40°C to +105°C and is available in the SMD-type, wide-body SOIC-8 (DWV) and gullwing-8 (DUB) packages.

Device Information⁽¹⁾

PART NUMBER	PACKAGE	BODY SIZE (NOM)
AMC1100	SOP (8)	9.50 mm × 6.57 mm
AMC1100	SOIC (8)	5.85 mm × 7.50 mm

For all available packages, see the orderable addendum at the end of the datasheet.