REF50集成电路（IC）的电压基准规格书PDF中文资料

REF50属于集成电路（IC）的电压基准。由德州仪器制造生产的REF50电压基准产品属于基准电压源系列，可通过相对较不稳定的电源提供稳定的电势，电压值始终保持恒定，以便在测量、控制和类似应用中用作比较的标准。其功能行为可能与用于大功率调节的线性稳压器相似，但基准电压源器件却不适合用于此类用途。用作比较标准时，若输出电流容量或实际负载电流增大，其性能通常会降低。

1 Features

• Low temperature drift (maximum):

– Enhanced-grade (New): 2.5ppm/°C

– High-grade: 3ppm/°C

– Standard-grade: 8ppm/°C

• High accuracy (maximum):

– Enhanced-grade: 0.025%

– High-grade: 0.05%

– Standard-grade: 0.1%

• Low noise:

– Enhanced-grade: 0.5μVPP/V

– High/Standard-grade: 3μVPP/V

• Excellent long-term stability:

– 22ppm after first 1000 hours (SOIC-8)

– 50ppm after first 1000 hours (VSSOP-8)

• Wide input voltage support:

– Enhanced-grade: 42V

– High/Standard-grade: 18V

• High-output current: ±10mA

• Temperature range: -40°C to 125°C

2 Applications

• Precision data acquisition systems

• Semiconductor test equipment

• Industrial process controls

• Medical instrumentation

• Pressure and temperature transmitters

• Lab and field instrumentation

3 Description

The REF50xx is a family of low-noise, low-drift, very

high precision voltage references. These references

are capable of both sinking and sourcing current, and

have excellent line and load regulation.

Excellent temperature drift (2.5ppm/°C) and high

accuracy (0.025%) are achieved using proprietary

design techniques. These features, combined with

very low flicker noise (0.5μVPP/V), make the REF50xx

family an excellent choice for use in high-precision

data acquisition systems. REF50 family is available in

enhanced grade (REF50xxEI), high grade (REF50xxI)

and standard grade (REF50xxAI). The reference

voltages are offered in 8-pin SOIC and VSSOP

packages and are specified from –40°C to 125°C.

The REF50xxEI supports wide supply voltage rating

of 42V with ultra-low IQ of 340μA. The wide supply

range allows for direct connection to the battery or

field supply. This also protects the device in case of

power supply IC failure.