LT1634BIS8-2.5 Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LT1634BIS8-2.5 is a precision two-terminal 2.5 V micropower voltage reference in an 8-pin SOIC package, delivering up to 50 mA with tight ±0.05% output accuracy. It features low supply current and temperature-stable output, ideal for ADC reference, DAC reference, and precision measurement systems.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- LT1634BIS8-2.5 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Precise 2.5 V output with ±0.05% accuracy (±9 mV window) for high-resolution ADC and DAC references
- Two-terminal shunt configuration simplifying PCB layout with minimal external components
- Up to 50 mA output current enabling use as a low-dropout precision bias source
- 8-pin SOIC package with plastic/epoxy body for automated SMT assembly
Applications
The LT1634BIS8-2.5 provides a stable 2.5 V reference for 12-bit to 16-bit ADCs and DACs in precision data acquisition systems, industrial instruments, and medical measurement equipment. Its two-terminal shunt architecture allows direct parallel connection with sensitive analog circuits without series impedance affecting reference accuracy. The device is also used in portable battery-powered instruments where its micropower consumption extends runtime while maintaining sub-millivolt reference stability.
Specifications
| YTEOL | 0 |
| Analog IC - Other Type | TWO TERMINAL VOLTAGE REFERENCE |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e0 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Voltage-Max | 2.50906V |
| Output Voltage-Min | 2.49094V |
| Output Voltage-Nom | 2.5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 235 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temp Coef of Voltage-Max | 25ppm/°C |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 20 |
| Trim/Adjustable Output | NO |
| Voltage Tolerance-Max | 0.362% |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How accurate is the 2.5 V output of the LT1634BIS8-2.5, and what ADC resolution does that accuracy support?
The LT1634BIS8-2.5 provides a 2.5 V nominal output with a guaranteed window of 2.49094 V to 2.50906 V, representing approximately ±0.05% initial accuracy or about ±9 mV. This precision supports 12-bit ADCs and 14-bit ADCs where LSB values of 0.6 mV to 1.2 mV require a reference error well below one LSB.
How does the two-terminal shunt configuration of the LT1634BIS8-2.5 simplify circuit design compared to a three-terminal series reference?
As a two-terminal shunt reference, the LT1634BIS8-2.5 connects like a zener diode with a series resistor setting the bias current, eliminating the input/output/ground pinout complexity of three-terminal series references. This simplifies PCB routing in precision analog front ends and allows the reference to be placed directly at the ADC reference pin with a small decoupling capacitor.
What current capacity does the LT1634BIS8-2.5 provide, and which load conditions is it suited for?
The LT1634BIS8-2.5 can source up to 50 mA, making it suitable for driving ADC reference inputs, precision op-amp bias networks, and small resistive loads in measurement circuits. For loads requiring more than 50 mA, a buffer amplifier should be added after the 2.5 V reference output to maintain accuracy.
For a portable battery-powered data logger, how does the LT1634BIS8-2.5 help extend battery life while maintaining reference accuracy?
The LT1634BIS8-2.5 operates with micropower supply current, typically in the tens of microamperes at light loads, minimizing power drain from the battery in a portable data logger. This low quiescent consumption combined with ±0.05% reference accuracy over temperature allows a 16-bit measurement system to maintain sub-LSB reference error across the full operating temperature range without sacrificing runtime.
When is LT1634BIS8-2.5 preferable to a bandgap reference IC with an integrated buffer for a precision 2.5 V rail?
The LT1634BIS8-2.5 is preferable when the circuit already has a setting resistor available to bias the shunt reference, and when board space is limited to an 8-pin SOIC footprint. Its two-terminal simplicity avoids the stability concerns associated with buffered reference output stages driving capacitive loads, and it is lower cost than integrated buffer references for applications where 50 mA output capacity is sufficient.
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Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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