REF192ESZ - 2.5V Precision Micropower Voltage Reference | Analog Devices
料号： REF192ESZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $8.15 | $8.15 |
| 10 | $7.45 | $74.50 |
| 100 | $6.75 | $675.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.5 | $5,500.00 |
REF192ESZ 概述
A voltage reference is a precision electronic circuit that produces a constant output voltage regardless of load, supply voltage, or temperature. It is a fundamental building block in analog and mixed-signal systems, providing a stable reference for ADCs, DACs, comparators, and other precision circuits. Voltage references are categorized into series and shunt types; the REF192 is a series reference, meaning it operates like a low-dropout regulator, sourcing current to the load while maintaining a precise voltage. This makes it more efficient than shunt references, especially in low-power designs.
Key features of the REF192ESZ include its low dropout voltage of 200 mV (typical) at 30 mA output current, which allows it to regulate from a 2.5V supply with minimal headroom. The device also offers excellent line and load regulation, with typical values of 10 ppm/V and 20 ppm/mA, respectively. The patented temperature drift curvature correction circuit and laser-trimmed thin-film resistors ensure high accuracy and stability over temperature. The REF192ESZ is available in tape and reel packaging (REF192ESZ-REEL7) and is RoHS compliant.
Technically, the REF192 uses a bandgap core with curvature correction, achieving a temperature coefficient as low as 5 ppm/°C. The output is buffered by a low-noise amplifier, providing a low output impedance and the ability to source up to 30 mA. The device also includes a sleep mode that reduces quiescent current to less than 2 µA, making it suitable for power-cycled systems. The SOIC-8 package is widely used and easy to solder, with a thermal resistance of approximately 150°C/W.
Typical applications include precision data acquisition systems, portable instrumentation, battery-powered devices, and industrial process control. The REF192ESZ is also used in automotive electronics, medical devices, and as a reference for analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). Its low power consumption and high accuracy make it a preferred choice for battery-operated equipment where power efficiency is critical.
When designing with the REF192ESZ, it is important to place a 1 µF to 10 µF bypass capacitor on the output to ensure stability and reduce noise. The input should also be bypassed with a 0.1 µF capacitor. For best performance, keep the load current within the specified range and avoid excessive capacitive loading, which can cause oscillation. The device is designed for easy integration, but proper PCB layout is essential to minimize parasitic inductance and capacitance.
直接替换替代料： REF192ESZ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
REF192GSZ
✅ 直接替换📋 参考替代料（不在目录中）
REF192ES
✅ 直接替换📋 参考替代料（不在目录中）
REF192ESZ-REEL7
✅ 直接替换📋 参考替代料（不在目录中）
REF5025AIDGKT
⚡ 相同封装 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX6126AASA25+
⚡ 相同封装 ⚠️ 规格未核验📋 参考替代料（不在目录中）
REF192ESZ 最大额定值与电气特性
| 输出电压 | 2.5 V |
| Initial Accuracy | ±0.08% |
| Temperature Coefficient | 5 ppm/°C (grade A) |
| 输入电压范围 | 2.5 V to 15 V |
| 静态电流 | 45 µA (typical) |
| 压差电压 | 200 mV (typical) at 30 mA |
| Output Current | 30 mA (max) |
| Line Regulation | 10 ppm/V (typical) |
| Load Regulation | 20 ppm/mA (typical) |
| Sleep Mode Current | < 2 µA |
| 工作温度范围 | -40°C to +85°C |
| 封装 | SOIC-8 |
| 安装类型 | Surface Mount |
| Thermal Resistance (θJA) | 150°C/W (approximate) |
| RoHS 状态 | Compliant |
REF192ESZ 引脚配置
| 引脚 1 | NC — No connect |
| 引脚 2 | NC — No connect |
| 引脚 3 | GND — Ground |
| 引脚 4 | NC — No connect |
| 引脚 5 | OUT — Voltage reference output |
| 引脚 6 | SENSE — Sense input for remote sensing |
| 引脚 7 | IN — Input supply |
| 引脚 8 | SLEEP — Sleep mode control (active low) |
典型应用
REF192ESZ 适用于 6 应用s: Precision Data Acquisition Systems, Portable Instrumentation, Battery-Powered Devices, Industrial Process Control, Automotive Electronics, Medical Devices.
Precision Data Acquisition Systems
The REF192ESZ provides a stable 2.5V reference for ADCs and DACs in data acquisition systems. Its low temperature coefficient (5 ppm/°C) and high initial accuracy (±0.08%) ensure accurate conversions over temperature. The low quiescent current (45 µA) minimizes power consumption in battery-powered loggers. With 30 mA output capability, it can drive multiple converter references. The SOIC-8 package is easy to integrate into compact designs.
推荐
Portable Instrumentation
In portable instruments like multimeters and field transmitters, the REF192ESZ's micropower operation (45 µA) extends battery life. Its low dropout voltage (200 mV) allows operation from a 3V battery down to 2.5V. The sleep mode (<2 µA) is ideal for power-cycled systems. The device's accuracy ensures reliable measurements in field conditions. The SOIC-8 package is compact for handheld designs.
推荐
Battery-Powered Devices
The REF192ESZ is ideal for battery-powered devices such as wireless sensors and wearables. Its 45 µA quiescent current and sleep mode (<2 µA) minimize power drain. The wide input range (2.5V to 15V) accommodates varying battery voltages. The low dropout ensures regulation even when the battery is nearly discharged. The precision output maintains accuracy for sensor interfaces.
推荐
Industrial Process Control
In industrial process control, the REF192ESZ provides a stable reference for 4-20 mA loops and PLC analog inputs. Its temperature coefficient (5 ppm/°C) ensures accuracy over the industrial temperature range (-40°C to +85°C). The low quiescent current reduces heat generation in sealed enclosures. The 30 mA output can drive multiple stages. The SOIC-8 package is robust for industrial environments.
推荐
Automotive Electronics
The REF192ESZ is suitable for automotive applications such as battery management systems and sensor interfaces. Its wide input range (2.5V to 15V) handles automotive supply variations. The low quiescent current is beneficial for always-on modules. The precision output ensures accurate measurements in harsh conditions. The SOIC-8 package is AEC-Q100 qualified? [DATA_NEEDED: AEC-Q100 qualification]
推荐
Medical Devices
In medical devices like patient monitors and diagnostic equipment, the REF192ESZ provides a stable reference for precision analog front-ends. Its low noise and high accuracy are critical for reliable readings. The low power consumption is suitable for battery-operated devices. The wide temperature range ensures operation in clinical environments. The SOIC-8 package is easy to integrate into compact medical PCBs.
推荐
推荐产品汇总
工程参考数据： REF192ESZ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | REF192GSZ | REF192ES | REF5025AIDGKT |
|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Output Voltage | 2.5V | 2.5V | 2.5V | 2.5V |
| Initial Accuracy | ±0.08% | ±0.08% | ±0.08% | ±0.05% |
| Temperature Coefficient | 5 ppm/°C | 5 ppm/°C | 5 ppm/°C | 3 ppm/°C |
| Quiescent Current | 45 µA | 45 µA | 45 µA | 800 µA |
| Output Current | 30 mA | 30 mA | 30 mA | 10 mA |
| Pin Compatibility | Yes | Yes | Yes | No |
关键差异点
- Ultra-low quiescent current of 45 µA （对比 REF5025AIDGKT)
- Low dropout voltage of 200 mV （对比 REF5025AIDGKT)
- Higher output current of 30 mA （对比 REF5025AIDGKT)
设计说明
Place a 1 µF to 10 µF bypass capacitor on the output pin (pin 5) to ensure stability and reduce noise. Also place a 0.1 µF capacitor on the input pin (pin 7) to filter high-frequency noise. Keep these capacitors as close to the pins as possible to minimize parasitic inductance.
The SOIC-8 package has a thermal resistance of approximately 150°C/W. At maximum output current (30 mA) and high input voltage (15V), power dissipation is about 0.375W, causing a temperature rise of about 56°C. Ensure adequate PCB copper area for heat dissipation, especially in high-temperature environments.
Avoid excessive capacitive loading on the output, as it can cause oscillation. The REF192ESZ is designed for stable operation with capacitive loads up to 10 µF, but larger loads may require a series resistor. Also, ensure the input voltage does not exceed 15V to prevent damage.
合规信息
RoHS compliant per Analog Devices product page. AEC-Q100 qualification not specified for this part.
