INA129P

Overview

The INA129P is a precision, low-power instrumentation amplifier manufactured by Burr-Brown. It features a single functional channel housed in a plastic DIP-8 package. The device operates within a wide supply voltage range of 4.5V to 36V or ±2.25V to ±18V. Key electrical specifications include a maximum offset voltage of 1125µV and a bandwidth of 1.3MHz. It draws a typical channel power consumption of 700µA and exhibits a slew rate of 4V/µs. The unit supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Provides high-precision signal amplification with low offset voltage characteristics suitable for sensitive measurement applications.
• Designed for low power consumption, enabling efficient operation in battery-powered or thermally constrained environments.
• Supports wide dual or single supply voltages, offering flexibility in system power architecture design.

Applications

• Strain gauge and bridge sensor signal conditioning
• Medical equipment input stages
• Industrial process control systems

Procurement Notes

Verify the specific suffix 'P' corresponds to the PDIP-8 package variant when sourcing. Confirm manufacturer lineage as Burr-Brown was acquired by Texas Instruments; ensure documentation aligns with the original Burr-Brown specifications if required for compliance. Check RoHS status as original versions may not be compliant compared to modern equivalents like the INA129UAE4.

Selection Notes

Select this component when a low-cost, general-purpose instrumentation amplifier with moderate precision is required. It is suitable for applications where 1.3MHz bandwidth is sufficient and ultra-low noise is not critical. Compare against higher-performance models like the INA128 if lower offset or higher speed is needed. Ensure the through-hole DIP package fits the target PCB layout constraints.

Part Context

The INA129 belongs to the family of precision instrumentation amplifiers originally developed by Burr-Brown. These devices are characterized by high common-mode rejection ratio (CMRR) and low drift. The INA129 specifically targets cost-sensitive applications requiring better performance than discrete resistor networks while maintaining simplicity of use with a single external gain resistor.

Replacement Considerations

The INA129UA is a surface-mount SOIC-8 equivalent. For lead-free compliance, consider the INA129UAE4. Other compatible alternatives include the INA122 or INA128 depending on specific performance requirements such as bandwidth or offset voltage.