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 1.2kVRMS 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。
器件型号 | 封装 | 封装尺寸(标称值) |
---|---|---|
AMC3302 | SOIC (16) | 10.30mm × 7.50mm |
Changes from Revision A (February 2021) to Revision B (July 2021)
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) |
MIN | MAX | UNIT | ||
---|---|---|---|---|
Power-supply voltage | VDD to GND | –0.3 | 6.5 | V |
Analog input voltage | INP, INN | HGND – 6 | VHLDO_OUT + 0.5 | V |
Analog output voltage | OUTP, OUTN | GND – 0.5 | VDD + 0.5 | V |
Digital output voltage | DIAG | GND – 0.5 | 6.5 | V |
Input current | Continuous, any pin except power-supply pins | –10 | 10 | mA |
Temperature | Junction, TJ | 150 | °C | |
Storage, Tstg | –65 | 150 |
VALUE | UNIT | |||
---|---|---|---|---|
V(ESD) | Electrostatic discharge | Human body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) | ±2000 | V |
Charged device model (CDM), per JESD22-C101 (2) | ±1000 |
MIN | NOM | MAX | UNIT | |||
---|---|---|---|---|---|---|
POWER SUPPLY | ||||||
VDD | Low-side power supply | VDD to GND | 3 | 3.3 | 5.5 | V |
ANALOG INPUT | ||||||
VClipping | Differential input voltage before clipping output | VIN = VINP – VINN | ±64 | mV | ||
VFSR | Specified linear differential full-scale voltage | VIN = VINP – VINN | –50 | 50 | mV | |
Absolute common-mode input voltage (1) | (VINP + VINN) / 2 to HGND | –2 | VHLDO_OUT | V | ||
VCM | Operating common-mode input voltage | (VINP + VINN) / 2 to HGND | –0.032 | 1 | V | |
TEMPERATURE RANGE | ||||||
TA | Specified ambient temperature | –40 | 125 | °C |
THERMAL METRIC(1) | AMC3302 | UNIT | |
---|---|---|---|
DWE (SOIC) | |||
16 PINS | |||
RθJA | Junction-to-ambient thermal resistance | 73.5 | °C/W |
RθJC(top) | Junction-to-case (top) thermal resistance | 31 | °C/W |
RθJB | Junction-to-board thermal resistance | 44 | °C/W |
YJT | Junction-to-top characterization parameter | 16.7 | °C/W |
YJB | Junction-to-board characterization parameter | 42.8 | °C/W |
RθJC(bot) | Junction-to-case (bottom) thermal resistance | n/a | °C/W |
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
---|---|---|---|---|---|---|
PD | Maximum power dissipation | VDD = 5.5 V | 231 | mW | ||
VDD = 3.6 V | 151 |