LTR3333T20YT3

P-1 LTR33xx 描述 LTR33是一系列高精度电压基准，具有业内较低的噪声（12µVp-p/V），非常低的温度漂移系数（20 ppm/℃）和高精度（± 0.15%），该器件的低电压热滞和低长期电压漂移可进一步提高稳定性和系 统可靠性。这种精度和特性的组合适合于数据采集，电池测试设备，工业仪表等对噪声敏感的应用， 帮助实现模拟前端的低噪声数据获取及测量。 LTR33系列提供SOT-23封装，可在-40 ℃ 至 + 85℃范围内运行。 特性 ◼ 固定输出电压：1.25V，2.048V，2.5V，3.0V，3.3V， 4.096V ◼ 输出精度：± 0.15% （最大值） ◼ 温度漂移系数：20 ppm/℃ （最大值） ◼ 1/f 噪声 (0.1Hz - 10Hz)：12μVP-P /V ◼ 线性调整率：100 ppm/V ◼ 电源电压：2.7V ~ 5.5V ◼ 功耗：500 μA （最大值） ◼ 启动时间：2ms （最大值） ◼ 工作温度范围：-40 ~ 85℃ 应用 VIN ◼ 精密数据采集系统 ◼ PLC模拟 I/O 模块 +5V LTR3325 GND ◼ 现场发送器 ◼ 电机驱动控制模块 REF +2.5V R1 10k R2 10k +5V ◼ 电池测试设备 ◼ 仪器仪表 LTA8151 5V CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Linearin and designs are registered trademarks of Linearin Technology Corporation. © Copyright Linearin Technology Corporation. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. 2.5V FN1601-2.0 — Data Sheet Low-Drift, Low-Power, Small-Footprint Series Voltage Reference LTR33xx P-2 管脚定义 名称 管脚功能 VIN 电源 GND 地 REF 模拟电压输出，外接一个去耦电容 表-A 管脚分布 SOT-23-3L (Top View) VIN 1 3 REF GND 2 订购信息(1) 型号 输出电压 温度系数 工作温度 封装 LTR3312T20YT3 1.25V 20ppm/℃ −40 to 85 ℃ SOT-23-3 LTR3320T20YT3 2.048V 20ppm/℃ −40 to 85 ℃ SOT-23-3 LTR3325T20YT3 2.5V 20ppm/℃ −40 to 85 ℃ SOT-23-3 LTR3330T20YT3 3.0V 20ppm/℃ −40 to 85 ℃ SOT-23-3 LTR3333T20YT3 3.3V 20ppm/℃ −40 to 85 ℃ SOT-23-3 (1) 联系先积获取产品最新细节和更多信息。 绝对最大额定参数 工业操作温度 -40 - 85℃ 储存温度 -50 - 125 ℃ 输入电压 -0.3 ~ 5.5 V ESD 保护 > 2000 V * 超过“绝对最大额定值”中列出的参数值可能会造成永久性损坏设备。不保证器件在超出规范中列出的条件下操作。长时间 暴露于极端条件下可能影响设备可靠性或功能。 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Linearin and designs are registered trademarks of Linearin Technology Corporation. © Copyright Linearin Technology Corporation. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. FN1601-2.0 — Data Sheet Low-Drift, Low-Power, Small-Footprint Series Voltage Reference LTR33xx P-3 电气特性 符号 参数 VIN 电源电压 ICC 电源功耗 ΔVOUT 输出精度 TC 温度系数 VIN−VOUT 电压差 ΔVOUT /ΔVIN ΔVOUT/ ΔIL 最小 典型 最大 单位 2.7 5 5.5 V 300 500 µA VCC = 5.0V，空载 输出电压 VOUT 说明 LTR3312 1.25 V LTR3320 2.048 V LTR3325 2.5 V LTR3330 3.0 V LTR3333 3.3 V LTR3340 4.096 V −0.15 0.15 % 20 ppm/⁰C 线性调整率 100 ppm/V 负载调整率 50 ppm/mA 200 mV 备注: 低温漂版本于2022年第二季度推出。 典型应用 VIN LTR33XX CBYPASS VIN 1µF to 10µF (recommended) REF VOUT GND CL 0.1µF to 10µF CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Linearin and designs are registered trademarks of Linearin Technology Corporation. © Copyright Linearin Technology Corporation. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. FN1601-2.0 — Data Sheet Low-Drift, Low-Power, Small-Footprint Series Voltage Reference P-4 LTR33xx 布局 布局指南 为了实现器件的最佳性能，请遵循标准的印刷电路板 (PCB) 布局指南。去耦电容应放置在紧靠PCB外接电源线和 地线的地方，电源和地之间应该用铜线连接。 如下图所示，LTR33xx的数据采集系统的PCB布局。 注意事项： ◼ 在IN引脚上连接一个低ESR 0.1µF陶瓷旁路电容器，并在OUT引脚上连接一个0.1µF到10µF的陶瓷电容，有利 于LTR33xx的稳定性。 ◼ 根据系统中电源的特性进行去耦。 ◼ 接地层有助于散热和减少电磁干扰 (EMI) 信号。 ◼ 去耦电容应尽可能的靠近芯片的电源引脚。减小去耦电容和芯片之间走线的寄生电感（如塞贝克效应），去耦 效果更好。 ◼ 尽可能缩短数模转换器的基准和偏置之间的走线，可实现降噪。 ◼ 模拟部分走线需与数字部分分离。如果不能保持分离，必要条件下可选垂直交叉。 布局示例 Input Signal GND LTR33XX AIN REF OUT C C VIN Via to GND Plane Via to Input Power CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Linearin and designs are registered trademarks of Linearin Technology Corporation. © Copyright Linearin Technology Corporation. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. Microcontroller ADC Input FN1601-2.0 — Data Sheet Low-Drift, Low-Power, Small-Footprint Series Voltage Reference LTR33xx P-5 Tape and Reel Information REEL DIMENSIONS TAPE DIMENSIONS K0 P1 B0 W Reel Diameter A0 Cavity A0 B0 K0 W P1 Reel Width (W1) Dimension designed to accommodate the component width Dimension designed to accommodate the component length Dimension designed to accommodate the component thickness Overall width of the carrier tape Pitch between successive cavity centers QUADRANT ASSIGNMENTS FOR PIN 1 ORIETATION IN TAPE Sprocket Holes Q1 Q2 Q1 Q2 Q3 Q4 Q3 Q4 User Direction of Feed Pocket Quadrants * All dimensions are nominal Device LTR3312T20YT3 Package Pins Type SOT23 3 SPQ 3 000 Reel Reel Diameter Width W1 (mm) (mm) 178 9.0 A0 (mm) B0 (mm) K0 (mm) P1 (mm) W (mm) Pin 1 Quadrant 3.3 3.2 1.5 4.0 8.0 Q3 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Linearin and designs are registered trademarks of Linearin Technology Corporation. © Copyright Linearin Technology Corporation. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. FN1601-2.0 — Data Sheet Low-Drift, Low-Power, Small-Footprint Series Voltage Reference LTR33xx P-6 封装信息 DIMENSIONS, SOT-23-3 D A2 E E1 A b SEATING PLANE A1 e 4×θ1 R1 R GAUGE PLANE SEATING PLANE c L θ L1 L2 4×θ1 L1 (单位: 毫米) 符号 最小 典型 最大 A – – 1.35 A1 0 – 0.15 A2 1.0 1.1 1.2 b 0.35 – 0.45 b1 0.32 – 0.38 C 0.14 – 0.20 C1 0.14 0.15 0.16 D 2.82 2.92 3.02 E 2.60 2.80 3.00 E1 1.526 1.626 1.726 e 1.8 1.9 2.0 L 0.35 0.45 0.6 L1 0.6REF L2 0.25REF R 0.1 – – R1 0.1 – 0.25 θ 0º 4º 8º θ1 5º 10º 15º CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Linearin and designs are registered trademarks of Linearin Technology Corporation. © Copyright Linearin Technology Corporation. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. FN1601-2.0 — Data Sheet Low-Drift, Low-Power, Small-Footprint Series Voltage Reference