AMC1306M25 - ±250mV Reinforced Isolated Modulator | Texas Instruments
料号： AMC1306M25DWVR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $5.45 | $5.45 |
| 10 | $4.9 | $49.00 |
| 100 | $4.36 | $436.00 |
| 500 | $3.92 | $1,960.00 |
| 1,000 | $3.53 | $3,530.00 |
AMC1306M25DWVR 概述
An isolated delta-sigma modulator is a type of analog-to-digital converter that oversamples the input signal and transmits a digital bitstream across an isolation barrier, where a digital sinc filter (typically in an MCU, DSP, or FPGA such as the TMS320F2800x C2000 family) reconstructs the measured current. In the power-management hierarchy it forms the front end of an isolated current-measurement chain: shunt resistor, isolated modulator, digital filter, current feedback for control loops.
Key features include excellent DC accuracy: offset error of ±50 uV (max), offset drift of 1 uV/C (max), gain error of ±0.2% (max), and gain drift of ±40 ppm/C (max). The device delivers a 16-bit data stream at 78 kSPS (with a 10 MHz input clock) and provides 100 kV/us typical common-mode transient immunity (CMTI), making it robust in electrically noisy inverter environments. The AMC1306 family is pin-compatible across ±50-mV and ±250-mV input ranges and Manchester-coded or uncoded output options.
The AMC1306M25 is ideal for motor control phase-current sensing, solar inverters, traction inverters, and industrial automation where accurate, galvanically isolated current measurement drives safety and efficiency. The capacitive isolation barrier resists magnetic interference, unlike transformer-based isolation.
Design tip: place the shunt resistor close to the input pins with Kelvin connections to minimize parasitic inductance, and power the high-voltage side from a clean isolated 5V supply such as the UCC14240 iso-bias converter.
直接替换替代料： AMC1306M25DWVR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： AMC1306M25DWVR （相同外形与封装尺寸） ——差异在于 Input Voltage Range, Operating Temperature, Output Data Rate, Package.
快速对比工具——选择替代料号进行并排对比：
AMC1306M25-Q1DWVR
✅ 直接替换📋 参考替代料（不在目录中）
AMC1306B25DWVR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
AMC1306M05DWVR
✅ 直接替换📋 参考替代料（不在目录中）
AMC1304M25DWVR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
AMC1204BDWVR
✅ 直接替换📋 参考替代料（不在目录中）
AMC1306M25DWVR 最大额定值与电气特性
| 输入电压范围 | ±250 mV differential |
| 分辨率 | 16 bit |
| Output Data Rate | 78 kSPS at 10 MHz clock |
| 接口 | CMOS bitstream (uncoded) |
| Offset Error | ±50 uV (max) |
| Offset Drift | 1 uV/C (max) |
| Gain Error | ±0.2% (max) |
| Gain Drift | ±40 ppm/C (max) |
| CMTI | 100 kV/us (typ) |
| Isolation Rating | 7000 VPEAK reinforced (VDE 0884-17) |
| Isolation Barrier | Capacitive double isolation |
| 封装 | 8-pin wide-body SOIC (DWV) |
| 工作温度 | -40C to +125C |
| 安装类型 | Surface Mount |
| Typical Supply Voltage | 5 V (high side) |
| RoHS 状态 | Compliant |
AMC1306M25DWVR 引脚配置
| 引脚 1 | VDD1 — High-side 5 V supply |
| 引脚 2 | GND1 — High-side ground reference |
| 引脚 3 | INP — Positive differential input (shunt +) |
| 引脚 4 | INN — Negative differential input (shunt -) |
| 引脚 5 | GND2 — Low-side ground reference |
| 引脚 6 | CLK — Clock input (10 MHz, low side) |
| 引脚 7 | DATa — CMOS bitstream data output |
| 引脚 8 | VDD2 — Low-side 3.3 V/5 V supply |
典型应用
AMC1306M25DWVR 适用于 6 应用s: Motor Control Phase-Current Sensing, Solar Inverter Current Measurement, Traction Inverters (Automotive EV), AC Motor Drives and PLC Analog I/O, DC Fast Charging Infrastructure, Wind and Grid Power Converters.
Motor Control Phase-Current Sensing
The AMC1306M25's ±250 mV input range and 78 kSPS output at 10 MHz clock provide the bandwidth and accuracy needed for FOC phase-current loops in industrial servo and traction drives. Its 100 kV/us typical CMTI withstands dv/dt from fast-switching IGBT and SiC stages, while the 7000 VPEAK reinforced isolation separates the control ground from the power stage. The bitstream feeds the C2000 SDFM peripheral, enabling sub-cycle current feedback; shunt-based sensing avoids bandwidth limits of hall-effect sensors.
推荐
Solar Inverter Current Measurement
Grid-tied solar inverters require precise, isolated DC and AC current feedback to meet efficiency and safety targets. The AMC1306M25's ±0.2% max gain error and 1 uV/C max offset drift keep measurement error low across the full -40C to +125C ambient range of outdoor inverters. The capacitive isolation barrier resists magnetic interference from power magnetics, and the CMOS bitstream isolates the low-voltage controller from the 600-1000 V DC bus. Kelvin-connected shunt placement preserves the ±50 uV offset advantage.
推荐
Traction Inverters (Automotive EV)
For EV traction inverters, the AEC-Q100 qualified AMC1306M25-Q1 variant provides the same ±250 mV input and 100 kV/us CMTI in the identical DWV package, letting one PCB serve automotive and industrial builds. Reinforced isolation per VDE 0884-17 supports functional safety isolation between the 400-800 V battery domain and the low-voltage vehicle network. High CMTI is essential next to SiC MOSFET bridges switching at 20-50 kV/us edges; the 78 kSPS stream supports high-bandwidth torque-control loops.
推荐
AC Motor Drives and PLC Analog I/O
Industrial drives and programmable logic controller analog modules use the AMC1306M25 to measure motor line currents galvanically isolated from the controller. The ±250 mV range accommodates economical milliohm shunts at tens of amps, while the 16-bit effective resolution supports overload and torque diagnostics. Because the AMC1306 family is pin-compatible across input ranges, designers can stock one PCB footprint and populate AMC1306M25 or AMC1306M05 depending on the shunt chosen for each power rating.
推荐
DC Fast Charging Infrastructure
DC fast chargers and onboard chargers need isolated current feedback on the high-voltage DC bus for current control, metering, and safety shutdown. The AMC1306M25's reinforced 7000 VPEAK isolation and stable ±40 ppm/C gain drift maintain measurement accuracy over wide charger temperature swings, and the CMOS bitstream output simplifies isolation of the digital domain. Its capacitive barrier is immune to the magnetic fields generated by high-power DC/DC converter transformers.
推荐
Wind and Grid Power Converters
Wind turbine converters and grid-scale power conversion systems operate in high-noise electromagnetic environments where transformer-based isolation can corrupt measurements. The AMC1306M25's capacitive double isolation barrier is highly resistant to magnetic interference per the TI datasheet, and its 100 kV/us typical CMTI tolerates transient events during converter switching and grid faults. The 78 kSPS data rate supports protective current monitoring with adequate margin for grid-code compliance algorithms.
推荐
推荐产品汇总
工程参考数据： AMC1306M25DWVR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | AMC1306M25-Q1DWVR | AMC1306B25DWVR | AMC1306M05DWVR | AMC1204BDWVR |
|---|---|---|---|---|---|
| Package | 8-SOIC wide-body (DWV) | 8-SOIC wide-body (DWV) - same | 8-SOIC wide-body (DWV) - same | 8-SOIC wide-body (DWV) - same | 8-SOIC wide-body (DWV) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Input Range | ±250 mV | ±250 mV | ±250 mV | ±50 mV | ±250 mV |
| Bitstream Coding | CMOS (uncoded) | CMOS (uncoded) | Manchester coded | CMOS (uncoded) | CMOS (uncoded) |
| AEC-Q100 | Not qualified | Qualified | Not qualified | Not qualified | Not qualified |
| Lifecycle | Active | Active | Active | Active | Legacy - NRND risk, migration recommended |
关键差异点
- Higher CMTI than legacy AMC1204 （对比 AMC1204BDWVR)
- Automotive variant in identical footprint （对比 AMC1306M25-Q1DWVR)
- Uncoded CMOS interface simplifies receiver logic （对比 AMC1306B25DWVR)
设计说明
Connect the shunt resistor to INP/INN with Kelvin (4-wire) sense traces routed as a tightly coupled differential pair. Parasitic trace inductance in series with the shunt causes gain peaking and ringing at the modulator input; keep the loop area under a few square millimeters and place the AMC1306M25 within 10 mm of the shunt. Do not route power current through the sense traces.
The high-side supply directly sets offset accuracy. Decouple VDD1 with 100 nF plus 1 uF ceramics as close to pins 1-2 as possible, and generate the isolated 5 V rail with a low-noise isolated bias device such as the UCC14240 rather than a bare flyback. Avoid ground bounce between GND1 and the shunt reference point; a single-point star connection preserves the ±50 uV offset specification.
Process the DATa bitstream with the C2000 SDFM peripheral or an FPGA sinc3 filter; the clock-to-data skew must respect the datasheet setup/hold timing at 10 MHz. For long clock traces on the low side, series-terminate to control ringing. Verify CMTI margin: with SiC bridges, keep the AMC1306M25 away from gate-driver loops where dv/dt can exceed the 100 kV/us rating locally.
合规信息
Reinforced isolation certified per DIN EN IEC 60747-17 (VDE 0884-17) and UL1577 per TI datasheet. AEC-Q100 qualified version available as AMC1306M25-Q1.
