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AMC1203
±250-mV input, precision current sensing basic isolated modulator with int clock
Data sheet
AMC1203
- 16-Bit Resolution
- SNR: 80.5dB min
- THD: –88dB max (AMC1203B)
- ±280mV Input Range with +5V Supply
- Internal 2.5V Reference Voltage: 1% Accuracy
- Gain Error: ±1% (AMC1203B)
- UL1577, IEC60747-5-2 (VDE0884, Rev. 2), and IEC61010-1 Approved
- Isolation: 4000VPEAK,
Working Voltage: 560V - Transient Immunity: 15kV/µs
- Isolation: 4000VPEAK,
- Typical 25-Year Life at Rated Working Voltage
(see Application Report SLLA197) - Specified Temperature Range:
–40°C to +105°C - APPLICATIONS
- Shunt Based Current Sensing in:
- Motor Control
- Uninterruptible Power Supplies
- Power Inverters
- Industrial Process Control
- Shunt Based Current Sensing in:
All other trademarks are the property of their respective owners
The AMC1203 is a 1-bit, 10MHz, isolated delta-sigma (ΔΣ) modulator with an output buffer separated from the input interface circuitry by a silicon dioxide (SiO2) isolation barrier. This barrier provides galvanic isolation of up to 4000VPEAK. Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry.
The AMC1203 modulator operates from a +5V supply with a dynamic range of 95dB. The differential inputs are ideal for direct connection to shunt resistors or other low-level signal sources. With the appropriate digital filter and modulator rate, the device can be used to achieve 16-bit analog-to-digital (A/D) conversion with no missing codes. An effective resolution of 14 bits and an SNR of 85dB (typical) can be maintained with a sinc3 filter with a decimation ratio of 256.
The modulator output is translated to a balanced signal and then transferred by the capacitive isolation barrier. Across the isolation barrier, a differential comparator receives the logic transition information, and then sets or resets a flip-flop and the output circuit accordingly.
The AMC1203 is available in SOP-8 gull-wing, SOP-8, and SOIC-16 packages. The AMC1203 is characterized for operation over the ambient temperature range of –40°C to +105°C.
Technical documentation
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View all 7 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | 1-Bit, 10MHz, 2nd-Order, Isolated Delta-Sigma Modulator datasheet (Rev. C) | 10 Jun 2011 | |
| Application note | Shunt Resistor Selection for Isolated Data Converters | PDF | HTML | 04 May 2023 | |
| Certificate | VDE Certificate for Basic Isolation for DIN EN IEC 60747-17 (Rev. U) | 07 Feb 2023 | ||
| Certificate | UL Certificate of Compliance File E181974 Vol 4 Sec 1 (Rev. A) | 05 Aug 2022 | ||
| White paper | Comparing isolated amplifiers and isolated modulators (Rev. A) | 28 Feb 2019 | ||
| Certificate | CSA Certification (Certificate: 220991) (Rev. A) | 23 Oct 2015 | ||
| EVM User's guide | AMC1203EVM User's Guide | 06 Aug 2010 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
AMC1203EVM — AMC1203 evaluation module for 1-bit, 10-MHz, second-order, isolated delta-sigma modulator
The AMC1203 is an isolated single-channel delta-sigma (ΔΣ) modulator used in high-resolution measurement applications including current monitoring, industrial process control and motor positioning systems. The AMC1203EVM is a small form factor board containing all the necessary (...)
User guide: PDF
Evaluation board
AMC1204EVM — AMC1204 evaluation module for 1-bit, 20-MHz, second-order, isolated delta-sigma modulator
The AMC1204 is an isolated single-channel delta-sigma (ΔΣ) modulator used in high-resolution measurement applications including current monitoring, industrial process control and motor positioning systems. The AMC1204EVM is a small form factor board containing all the necessary (...)
User guide: PDF
Evaluation board
AMC1210MB-EVM — AMC1210 motherboard evaluation module
The AMC1210MB-EVM is a complete evaluation kit for the AMC1210 & ADS1205 in resolver applications and part of a modular evaluation system for evaluating TI delta-sigma modulators. The AMC1210MB-EVM software allows use of the AMC1210 in a variety of configurations for resolver and current shunt (...)
User guide: PDF
Reference designs
TIDA-RESOLVER-APPLICATIONS-REFERENCE-DESIGN — Motherboard/controller for the AMC1210
This is a reference design for resolver applications and part of a modular system for evaluating our delta-sigma modulators. The software included allows use of the AMC1210 in a variety of configurations for resolver and current-shunt applications and features a data-export utility to support data (...)
| Package | Pins | Download |
|---|---|---|
| SOIC (DW) | 16 | View options |
| SOP (DUB) | 8 | View options |
| SOP (PSA) | 8 | View options |
Ordering & quality
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