Analog Devices, Inc. · NASDAQ:ADI
Analog Devices — Technical Presentation (July 2019)
23 slides from Analog Devices's technical presentation, July 2019
Slide 1: 电压基准源的产品及选择
电压基准源的产品及 选择 July 2019 1 ©2019 Analog Devices, Inc. All rights reserved.
Slide 2: 讲座议程
讲座议程 ► 电压基准源的基本概念 § 分类 § 主要参数 ► 如何选择电压基准源 ► 几款电压基准源产品推荐 2 ©2019 Analog Devices, Inc. All rights reserved.
Slide 3: 什么是电压基准源（Voltage Reference）?
什么是电压基准源（Voltage Reference）? ► 电压基准源是一个可产生稳定、精确直流电压的器件，一般用于ADC、DAC和其他 模拟电路精确的参考电压设定。 3 ©2019 Analog Devices, Inc. All rights reserved.
Slide 4: 什么是电压基准源（Voltage Reference）?
什么是电压基准源（Voltage Reference）? ► 电压基准源是一个可产生稳定、精确直流电压的器件，一般用于ADC、DAC和其他 模拟电路精确的参考电压设定。 ► 电压基准源的一般用途 § ADC/DAC参考源 § 传感器的偏置 § 元器件/系统供电或驱动 § 虚拟地设置 ADXL1002 ADAQ7980 REF V+ REF REF_OUT LDO_OUT VDD Sallen-Key Voltage Follower PD_REF LDO PD_LDO 10uF 2.2uF 5kΩ 5kΩ IN+ VIO 20Ω 1.0nF IN– SDI SENSOR 1.0nF ADC S
Slide 5: 电压基准源的作用：将数据采集与真实世界进行关联
电压基准源的作用：将数据采集与真实世界进行关联 Voltage Power Voltage Reference Management Reference Senso Output MUX r uP MUX ADC DAC DSP MEASURE & PROTECT CONDITION & ACQUIRE SYNTHESIZE & DRIVE 5 ©2019 Analog Devices, Inc. All rights reserved.
Slide 6: 电压基准源的分类（按应用拓扑）
电压基准源的分类（按应用拓扑） Shunt Reference Series Reference 并联型电压基准源 串联型电压基准源 •A two-terminal Device •A three-terminal device •Need for an extra resistance •No need for an extra resistance •Need more board space •Typically lower Vin range •Usually smaller packages •Might be in a larger package •Tends to be che
Slide 7: 电压基准源的基本特性：精度和稳定性
电压基准源的基本特性：精度和稳定性 Common VREF ►电压基准源的基本性能要求 Applications • Converter ►高精度 reference • Sensor bias • Component or ►低噪声 system power • Virtual ground ►电压基准源必须在下列情况下保持稳定 § 温度变化 => 温度系数 § 温度循环 => 热迟滞 § 环境压力变化 => 无规定 § 湿度变化 => 没有对应的性能参数规定 § 时间的变化 => 长期稳定性 7 ©2019 Analog Devices, Inc. All rights reserved.
Slide 8: 电压基准源几个关键性能指标
电压基准源几个关键性能指标 ► 初始精度 (Initial Accuracy) 或初始误差（Initial Error） ► 温度漂移（Temperature Drift）或温度系数（Temperature Coefficient） ► 噪声Noise § 1/f 噪声 § 宽带噪声 ► 热迟滞 Thermal Hysteresis ► 长期稳定性 Long Term Stability § Long-Term Drift (LTD) § Early-Life Drift (ELD) ► 电压调整率（Line Regulation） ► 负载调整率 （Load Regulation） ► 输入
Slide 9: 温度漂移（温度系数）特性
温度漂移（温度系数）特性 9 ©2019 Analog Devices, Inc. All rights reserved.
Slide 10: 温度系数的典型测量方法: Box Method
温度系数的典型测量方法: Box Method 0°C 25°C 70°C –40°C +25°C +85°C Underestimated 10 ©2019 Analog Devices, Inc. All rights reserved.
Slide 11: 温度系数测量方法: Box Method vs Bow-tie Method
温度系数测量方法: Box Method vs Bow-tie Method 11 ©2019 Analog Devices, Inc. All rights reserved.
Slide 12: 温度漂移性能的相对重要性
温度漂移性能的相对重要性 TC Dominates Error TC > 20ppm/C 12 ©2019 Analog Devices, Inc. All rights reserved.
Slide 13: 如何选择一个合适的电压基准源
如何选择一个合适的电压基准源 系统架构 切合系统性能要求的产品的误差性能 § 电源电压 § 误差估算 § 功率预算 Total Error § 负载能力 = Initial Accuracy + TC * (Total Specified Temp Range) § 压差 + Line Regulation * (Application Vin – § 温度范围 Specified Vin) + Load Regulation * (Iout) § 电路拓扑结构 + Long Term Drift * √kHr § 特殊行业认证 + Thermal Hysteresis + Noise § 封
Slide 14: 电压基准源简单的选择路径图
电压基准源简单的选择路径图 Highest LT6654 – “Go , Lowest Input Power Precision and t a t io n To” Vref Me Stability/Lowest m en G a d ic a l ADR3550 – 100 μA u s t r c a t io n 10 ppm/°C s D /he Noise I n i e t e a lt h i s io n e c t r if 38V Supply Range c t io c a r ADR3450 – 100 μA c l e, ADR4550 – 2 ppm/°C
Slide 15: ADI – 业界产品系列最全、种类最多、性能最高的电压基准源供应商
ADI – 业界产品系列最全、种类最多、性能最高的电压基准源供应商 20 20 High O/P Lowest Power Drive LT1460/6660 LT6656 LT6654 10 10 LT6658 (ppm/C) Lowest Noise “Refulator” ADR3450 (ppm/C) ADR365 + LT1021 AD586 Stability 5 ADR3550 Stability 5 LTC6652 REF195 AD780 ADR435 Temperature ADR445 3 Temperature LT1461 ADR4550 Highest = 2 LT
Slide 16: ADR430/ADR431/ADR433/ADR434/ADR435
ADR430/ADR431/ADR433/ADR434/ADR435 - 超低噪、强驱动电压基准源 Features and Specifications Portfolio Positioning ► High accuracy Product Features ADR43x ADR44x § Voltage drift: 3 ppm/°C max (B grade) Low TC (temperature B Grade: 3 ppm/°C max B Grade: 3 ppm/°C max § Low initial output voltage error: 0.05% max (B
Slide 17: ADR4550/ADR4540/ADR4533/ADR4530/ADR4525/ADR4520
ADR4550/ADR4540/ ADR4533/ADR4530/ ADR4525/ADR4520: - 超低噪、低温漂、超低功耗电压基准源 Features and Specifications Portfolio Positioning Product Features ADR45xx ADR44x ► High accuracy § Voltage drift: 2 ppm/°C max (B grade) Low TC (temperature B Grade: 2 ppm/°C max B Grade: 3 ppm/°C max coefficient) at –40°C to +1
Slide 18: ADR45xx新品: C级和D级产品
ADR45xx新品: C级和D级产品 ► Ultra-High Accuracy § Voltage Drift: 2ppm/°C, max. (B Grade) § Low initial output voltage error: 0.02% max. (B Grade) § Long Term Drift Grade A/B/C: < 25ppm/1st 1kHr. typ. New § Long Term Drift Grade D: < 15ppm/1st 1kHr. typ. Released Release Sampling ► Excellent Noise Performa
Slide 19: ADR45xx LTD: SOIC vs. LS8
ADR45xx LTD: SOIC vs. LS8 19 2019-7-29 Analog Devices Confidential Information. ©2018 Analog Devices, Inc. All rights reserved.
Slide 20: LT6657: 宽工作电压、低压差、宽工作温度下业界最低温漂
LT6657: 宽工作电压、低压差、宽工作温度下业界最低温漂 Features and Specifications Portfolio Positioning ► Low drift Product Features LT6657 LTC6655 § A-Grade: 1.5 ppm/°C maximum Temperature Coefficient 1.5 ppm/°C max 2 ppm/°C max § B-Grade: 3 ppm/°C maximum Supply Voltage 50 mV dropout to 40 V 500 mV dropout to 13.2 V ► H
Slide 21: LT6658: 精密双通道输出、高驱动能力电压基准源
LT6658: 精密双通道输出、高驱动能力电压基准源 Features and Specifications Portfolio Positioning Product Features LT6658 LTC6654 ► Low drift § A-Grade: 10 ppm/°C Max Output Current –20 mA to +150 mA/50 mA ±10 mA § B-Grade: 20 ppm/°C Max Supply Voltage 2.5 V dropout to 36 V 100 mV dropout to 36 V ► High accuracy Load Re
Slide 22: LTC6655LN: 业界最低噪的带隙电压基准源
LTC6655LN: 业界最低噪的带隙电压基准源 0.25 ppm Noise, 2 ppm/°C Reference with Noise Reduction Pin Features and Specifications Portfolio Positioning ► Low noise Product Features LTC6655LN LTC6655 § 0.21 ppmRMS noise, 10 Hz to 1 kHz with CNR = 100 μF RMS Noise 0.21 0.67 (ppm RMS 10 Hz to 1 kHz) ► High accuracy Loa
Slide 23: ADI精密产品选型手册 – Download NOW !
ADI精密产品选型手册 – Download NOW ! http://www.analog.com/media/en/news-marketing- collateral/product-selection-guide/precision-technology- selection-guide.pdf 23 ©2019 Analog Devices, Inc. All rights reserved.