【经验】国产模拟前端芯片TPAFE0808硬件电路设计要点
国产3PEAK(思瑞浦)面向工业、通信等市场不断深入开拓,推出的小体积、集成多通道可配置模数和数模转换器模拟前端芯片TPAFE0808,内置8通道12bit ADC、8通道12bit DAC、片内参考电压及温度传感器,但尺寸低至2x2mm,非常适宜用在需要多通道模拟外设且要求小体积的产品上,比如光模块等,深受广大工程师的喜爱。
TPAFE0808作为高集成度的模拟前端芯片,在电路设计上有多个需要注意事项,本文做了详细总结,可供大家参考。
一、供电电路处理
VDD电源输入,是给整个芯片内部供电,工作电压范围为 2.7 V 至 5.5 V。可以接2.2µF+ 0.1 µF 对地电容器实现滤波及退偶,也可以单独接0.1 µF的退偶电容。
需要注意的是,TPAFE0808还提供了VLogic接口电源,它用来确定I2C的接口电压。电压范围为 1.8 V 至 5.5 V。推荐在VLogic脚上加一个0.1 µF的退偶电容。
图1 TPAFE0808供电及其它部分电路
二、参考电压电路处理
Vrfe脚是参考电压输入/输出引脚。当内部基准使能时,Vref引脚上则提供 2.5 V 基准电压。如上图1所示,建议在 VREF 引脚和 GND 之间连接一个 0.1 µF 电容器以实现指定性能。当内部基准被禁用时,必须向该引脚施加外部基准,需要注意的是,外部基准电压范围为 1 V 至 VDD。
三、IO通道电路处理
如图1,TPAFE0808共有8个输入/输出通道。这些引脚可独立配置为 DAC、ADC 或通用数字输入输出口(GPIO)。 每个引脚的功能是通过对配置寄存器中的相应位进行编程来确定的。需要注意的是,在工业等应用领域,一般要求对IO口(无论此时是配置为DAC、ADC 或GPIO)要添加保护措施。如下图2,
IO通道处理共提供了3个选项,大家可以根据自己的需求进行选择。
图2 IO通道处理的3个选项
四、I2C接口电路处理
串行数据线及串行时钟线,支持标准的I2C接口。 需要注意的是,SDA为双向开漏接口,必须通过外部上拉电阻将其拉至 VLOGIC 电源。因为TPAFE0808只能做从,SCL是单向口线,为了提高驱动力,推荐外部也上拉电阻将其拉至 VLOGIC 电源。电路参考图1.
五、I2C低位地址位
为了实现一个主机可以挂多个TPAFE0808器件,TPAFE0808七个地址位中的最低一位A0,是由外部口线“A0”决定的。当“A0”接高电平时,则最低一位地址位A0为1,当“A0”接低电平时,则最低一位地址位A0为0。如下图3,共有3种确定“A0”的接法,大家根据自己的需求选择。
图3 A0位地址控制电路
六、复位电路处理
TPAFE0808提供了一个异步复位引脚。当将此引脚拉高,TPAFE0808可以进行正常操作。需要注意的是,当该引脚被驱动为低电平时,芯片复位,各寄存器恢复为默认配置。另外,TPAFE0808也支持“软复位”操作,即主控MCU向TPAFE0808发一个复位命令,TPAFE0808即可实现复位。
图4 复位引脚处理电路
最后,还需要用户注意的是,在任何精度很重要的电路中,仔细考虑电源和接地回路布局会有助于确保额定性能,将TPAFE0808放置在PCB模拟平面上,也会有助于提高模拟性能。
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高精度DAC/ADC:4~24Bit DAC,DNL小于正负1 LSB,兼容标准的SPI、QSPI、MICROWIRE总线方式。数字式电流/功率监测器:12/16bit,在整个工作温度范围内保证无失码。多通道可配置模数/数模转换器:集成4/8/12通道12bit ADC的可灵活配置的数模/模数转换芯片。
产品型号
|
品类
|
Status
|
Rating
|
Package
|
Resolution (Bits)
|
VDD(V)
|
Channel
|
Throughput Rate(Msps)
|
INL
|
Offset Error(LSB, Max)
|
Gain Error(LSB)
|
IDD(mA)
|
TPAFE5160SI08-QP7R
|
高精度ADC
|
Production
|
Industrial
|
LQFP10X10-64
|
16
|
12
|
8
|
0.35
|
±2(LSB,Max)
|
±15
|
±15
|
52
|
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思瑞浦(3PEAK)汽车应用线性/转换器/电源管理产品选型指南
描述- 3PEAK is committed to the research and development of high-performance, high-quality, and highly reliable integrated circuit products, including signal chains, power analog chips, mixed-signal frontends, and embedded processors to provide customers with all-around solutions.
型号- TPM27524Q-SO1R-S,TPQ50571Q-QFNR-S,TPL803133Q-DF6R-S,TPA1882Q-VR-S,TPA5562Q-VS1R-S,TPT1029Q-DFCR-S,TPC5120Q-TS7R-S,TPT1044Q-DFCR-S,TPT1029Q-SO1R-S,TPM2025Q-FC1R-S,TPL803150Q-DF6R-S,TPL910ADJQ-DF6R-S,TPT1042Q-SO1R-S,TPS42S40BQ-TSAR-S,TPA1882Q-SO1R-S,TPA1881Q-S5TR-S,TPA5561Q-S5TR-S,TPL853650Q-TSBR-S,TPA5562Q-SO1R-S,TPT1057Q-SO1R-S,TPV710NZQ-S5TR-S,TPQ5055Q-DFTR-S,TPT1044Q-SO1R-S,TPT1057Q-DFCR-S,TPT1462VQ-DFCR-S,TPT1044VQ-SO1R-S,TPT1024Q-QFXR-S,TPA2031Q-S5TR-S,TPC5121Q-TS8R-S,TPM27524Q-DF4R-S,TPT1051VQ-DF6R-S,TPT1043Q-SO2R-S,TPL803150Q-EV1R-S,TPT1021Q-DFCR-S,TPT1051Q-SO1R-S,TPL803133Q-EV1R-S,TPV8368SAQ-S6TR-S,TS2903Q-SO1R-S,TPA5572Q-VS1R-S,TPT1462Q-DFCR-S,TPA5571Q-S5TR-S,TPM5350MQ-SOAR-S,TPT10285Q-SO1R-S,TPT1022Q-DFKR-S,LM2903DQ-SO1R-S,TPT1051Q-DF6R-S,TPL8652FQ-ES1R-S,TPT1057VQ-SO1R-S,TPT1051VQ-SO1R-S,TPM2015Q-FC1R-S,TPA1862Q-SO1R-S,TPT10283Q-SO1R-S,TPT1042VQ-SO1R-S,TPL803133Q-ST4R-S,TPL803433Q-EV1R-S,TPL803450Q-EV1R-S,TPQ50551Q-DFTR-S,TPT29539Q-TS5R-S,TPM92611Q-EV1R-S,TPL855650Q-TSCR-S,TPL803150Q-ST4R-S,TPS42S40AQ-TSAR-S,TPM27524Q-EV1R-S,TPM6505BQ-S6TR-S,TPM6501AQ-S5TR-S,TPA5571NQ-S6TR-S,TPT1022Q-SO2R-S,TPT1043Q-DFKR-S,TPL855633Q-TSCR-S,TPT1044VQ-DFCR-S,TPL853633Q-TSBR-S,TPT1057VQ-DFCR-S,TPL8651Q-ES1R-S,TPT1145NQ-SO2R-S,TPT1462VQ-SO1R-S,TPT1145NQ-DFKR-S,TPM6505AQ-S6TR-S,TPT1462Q-SO1R-S,TPT10285Q-DFCR-S,TPL8151ADQ-ES1R-S,TPA1861Q-S5TR-S,TP28Q-VS1R-S,TPT1042VQ-DF6R-S,TPL8032ADQ-ES1R-S,TPW3188Q-TS3R-S,TPT1042Q-DF6R-S,TPT10283Q-DFCR-S,TPA5572Q-SO1R-S,TPT1021Q-SO1R-S
【应用】国产小封装前端可模拟配置芯片SGM9050助力400G相干光模块,内部可配置4路电流型DAC
某客户在设计一款400G硅光模块产品时,由于主控MCU的资源有限,电路设计需使用电流型DAC进行采样。本文推荐SGMICRO推出的小封装前端模拟AFE芯片SGM90508,可配置4路IDAC输出,每路电流输出满载可达80mA。
应用方案 发布时间 : 2023-05-27
思瑞浦(3PEAK)车规芯片选型指南(英文)
描述- Established in 2012, 3PEAK was listed on the Shanghai Science and Technolog y Innovation Board on September 21, 2020. The company is committed to the research and de velopment of high-performance, high-quality, and highly reliable integrated circuit products, including signal chains, power analog chips, mixed-signal front-ends, and embedded processors to provide customers with all-around solutions
型号- LM2904A-VS1R-S,TPL8032ADQ,TP1562AL1-SO1R-S,TPM27524Q-SO1R-S,TPA2031Q,TPT1042V-SO1R-S,TPL803133Q-DF6R-S,TPT7742-SOBR-S,TPH2861-DF4R-S,TPR6040F30-S3TR-S,TPM2025Q-FC1R-S,TPT1042Q-SO1R-S,TPA1881Q-S5TR-S,TPR6040F33-S3TR-S,LM2902A-TS2R-S,TPR33XX,TPA8001-SOAR-S,TPA8003-SOAR-S,TP1564AL1-SO2R-S,TPL905236-S5TR-S,TP2262L1-SO1R-S,TPT1043Q-SO2R-S,TPT1051VQ-DF6R-S,TPR6040FXX,TPT1051Q-SO1R-S,TPT774X,TPL803133Q-EV1R-S,LM2903DQ-SO1R-S,TPT1051Q-DF6R-S,TPL8652FQ-ES1R-S,LM2903A-SO1R-S,TPT1051VQ-SO1R-S,TPR3330-S3TR-S,TPT7741F-SO3R-S,TPL803133Q-ST4R-S,TPT7741F-SOBR-S,TPL803450Q,TPL803450Q-EV1R-S,TPR3312-S3TR-S,TPL803150Q-ST4R-S,TPL905218-S5TR-S,TPL905233-S5TR-S,TPT7720-SO1R-S,TPR6040F25-S3TR-S,TPT1043Q-DFKR-S,TPL905215-S5TR-S,TPR6040F20-S3TR-S,TPL8651Q-ES1R-S,LM2901A-SO2R-S,TPT1145NQ-SO2R-S,TPL9052XX,TPL8031XXQ,TPA2644-SO2R-S,LM2904A-TS1R-S,TPM650XAQ,TPL8151ADQ-ES1R-S,TPL865XQ,TPT772X,TPT1042Q-DF6R-S,TPT7721-SOBR-S,TPT1044V-SO1R-S,TPT1145Q-SO2R-S,TPR3325-S3TR-S,TPR431B-S3TR-S,TPR6040F50-S3TR-S,TPW3188Q,TPT7742F-SOBR-S,TPA1882Q-VR-S,TPR3320-S3TR-S,TPL910ADJQ,TPT7740F-SO3R-S,TPC5120Q-TS7R-S,TPL803150Q-DF6R-S,TPL910ADJQ-DF6R-S,TPV8368SAQ,TPA1882Q-SO1R-S,TP1561AL1-S5TR-S,TPA5561Q-S5TR-S,TPL905225-S5TR-S,TPL905228-S5TR-S,TPT7741-SSAR-S,TPL8151ADQ,LM2902A-SO2R-S,TP2261L1-S5TR-S,TPA2031Q-S5TR-S,TPM2025Q,TPL803150Q-EV1R-S,TPM27524Q-DF4R-S,LM2903A-TS1R-S,TPV8368SAQ-S6TR-S,TPT1145NQ,TP1562AL1-VS1R-S,TPL803133-ST4R-S,TPT104XQ,TPR3333-S3TR-S,TPT1042VQ-SO1R-S,TPL905230-S5TR-S,LM2903A-VS1R-S,TPM27524Q-EV1R-S,TPR6040F40-S3TR-S,TPM27524Q,TPT7721-SO1R-S,LM2901A-TS2R-S,TPM6501AQ-S5TR-S,TPL905212-S5TR-S,TPT7720F-SO1R-S,TPA188XQ,TPT1145NQ-DFKR-S,TPR431B,TPM6505AQ-S6TR-S,TPT7741-SOBR-S,TPA5561Q,TPT1051VQ,TPT1042VQ-DF6R-S,TPL8032ADQ-ES1R-S,LM2904A-SO1R-S,TPW3188Q-TS3R-S,TPC5120Q,LM2903DQ,TPR3340-S3TR-S
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