AMC3302 具有集成直流/直流转换器的高精度、±50mV 输入、增强型隔离放大器

1 特性

2 应用

3 说明

AMC3302 是一款精密的隔离放大器，针对基于分流器的电流测量进行了优化。这款完全集成的隔离式直流/直流转换器可实现器件低侧的单电源运行，使该器件成为空间受限应用的独特解决方案。增强型电容式隔离栅已通过 VDE V 0884-11 和 UL1577 认证，并支持高达 1.2kV_RMS 的工作电压。

该隔离栅可将系统中以不同共模电压电平运行的各器件隔开，并保护电压较低的器件免受高电压冲击。

AMC3302 的输入针对直接连接低阻抗分流电阻器或另一个具有低信号电平的低阻抗电压源的情况进行了优化。出色的直流精度和低温漂支持在 –40°C 至 +125°C 的扩展工业温度范围内进行精确的电流测量。

AMC3302 的集成直流/直流转换器故障检测和诊断输出引脚可简化系统级设计和诊断。

器件信息⁽¹⁾

器件型号	封装	封装尺寸（标称值）
AMC3302	SOIC (16)	10.30mm × 7.50mm

(1) 如需了解所有可用封装，请参阅数据表末尾的可订购产品附录。

典型应用

4 Revision History

Changes from Revision A (February 2021) to Revision B (July 2021)

• 更改了光伏逆变器的链接地址Go
• Changed LDO_OUT pin description in Pin Functions table to include that no external load is allowed on the LDO_OUT pinGo
• Changed overvoltage category for rated mains voltage ≤ 600 V from I-IV to I-III and for rated mains voltage ≤1000 V from I-III to I-II Go
• Changed C_IO from ~3.5 pF to ~4.5 pFGo
• Changed output bandwidth (BW) minimum value from 300 kHz to 290 kHzGo
• Changed CMTI limits from 85 kV/µs (min), 135 kV/µs (typ) to 95 kV/µs (min), 155 kV/µs (typ)Go
• Deleted histograms from Typical Characteristics sectionGo
• Changed first bullet in Isolated DC/DC Converter section to include that the low-side LDO does not output a constant output voltage and is not intended for driving any external loadGo
• Added discussion of high-side and low-side LDO to What to Do and What Not to Do sectionGo
• Added information on reducing radiated emission to Power Supply Recommendations section, changed Recommended External Components tableGo
• Added ferrite beads to Recommended Layout of the AMC3302 figureGo
• Added EMI application note to Related Documentation sectionGo

5 Pin Configuration and Functions

Figure 5-1 DWE Package, 16-Pin SOIC, Top View

Table 5-1 Pin Functions

PIN		TYPE	DESCRIPTION
NO.	NAME
1	DCDC_OUT	Power	High-side output of the isolated DC/DC converter; connect this pin to the HLDO_IN pin.(1)
2	DCDC_HGND	High-side power ground	High-side ground reference for the isolated DC/DC converter; connect this pin to the HGND pin.
3	HLDO_IN	Power	Input of the high-side LDO; connect this pin to the DCDC_OUT pin(1)
4	NC	—	No internal connection; connect this pin to HGND or leave this pin unconnected.
5	HLDO_OUT	Power	Output of the high-side LDO.(1)
6	INP	Analog input	Noninverting analog input. Either INP or INN must have a DC current path to HGND to define the common-mode input voltage.(2)
7	INN	Analog input	Inverting analog input. Either INP or INN must have a DC current path to HGND to define the common-mode input voltage.(2)
8	HGND	High-side signal ground	High-side analog ground; connect this pin to the DCDC_HGND pin.
9	GND	Low-side signal ground	Low-side analog ground; connect this pin to the DCDC_GND pin.
10	OUTN	Analog output	Inverting analog output.
11	OUTP	Analog output	Noninverting analog output.
12	VDD	Low-side power	Low-side power supply.(1)
13	LDO_OUT	Power	Output of the low-side LDO; connect this pin to the DCDC_IN pin. The output of the LDO must not be loaded by external circuitry.(1)
14	DIAG	Digital output	Active-low, open-drain status indicator output; connect this pin to the pullup supply (for example, VDD) using a resistor or leave this pin floating if not used.
15	DCDC_GND	Low-side power ground	Low-side ground reference for the isolated DC/DC converter; connect this pin to the GND pin.
16	DCDC_IN	Power	Low-side input of the isolated DC/DC converter; connect this pin to the LDO_OUT pin.(1)

(1) See the Section 9 section for power-supply decoupling recommendations.

(2) See the Section 10 section for details.

6 Specifications