INA101HP-1 Instrumentation Amplifier | Texas Instruments
MPN: INA101HP-1 ✓ ActiveINA101HP-1 Overview
An instrumentation amplifier is a specialized analog signal-conditioning amplifier for differential sensors and other low-level sources. Its internal three-op-amp architecture rejects common-mode interference while preserving a small differential signal. The INA101HP-1 belongs to the instrumentation-amplifier category within the broader hierarchy of amplifier ICs, analog integrated circuits, and semiconductor signal-conditioning devices. This makes it suitable where a sensor output must be amplified before being measured by an ADC or processed by a control system.
The main performance advantages are low drift of 0.25 uV/degree C maximum, low offset of 25 uV maximum, and low nonlinearity of 0.002%. A high input impedance of 10 Gohm prevents the amplifier from significantly loading the source. Its single integrated design also reduces the number of external precision resistors and op-amps required to build a conventional three-op-amp instrumentation-amplifier circuit. These characteristics are especially useful for strain measurements, bridge circuits, and precision analog measurement systems.
The INA101 integrates three precision operational amplifiers with laser-trimmed metal-film resistors. Gain is selected through external connections, while the internal resistor network provides repeatable ratios without requiring a collection of closely matched external resistors. At unity gain, bandwidth reaches 300 kHz; bandwidth falls as gain increases because the closed-loop feedback network must preserve accuracy at lower signal frequencies. Input voltage and supply rails must be selected so that every internal amplifier remains within its operating limits.
Typical uses include low-level strain-gauge and bridge excitation measurements, precision data-acquisition channels, industrial process-control inputs, and sensor interfaces where common-mode voltage varies substantially between the input terminals. The instrumentation-amplifier topology is particularly useful when the wanted signal is small relative to the common-mode voltage. Its through-hole PDIP package also suits legacy control boards, educational platforms, and instrumentation prototypes where surface-mount assembly is unnecessary.
When designing a board around INA101HP-1, follow the manufacturer pinout and reference configuration for input polarity, gain selection, reference connection, and supply bypass capacitors. Keep sensor inputs away from switching nodes and high-current return paths, and terminate unused inputs according to the device recommendations. Verify the selected gain against the bandwidth, output swing, and supply limits before beginning calibration.
This page organizes the technical specifications, verified sourcing information, package details, application guidance, and same-package replacement options for the INA101HP-1. It also provides comparison-oriented design notes intended to accelerate component selection, board bring-up, and precision analog signal-chain planning.
Drop-in alternatives for INA101HP-1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with INA101HP-1 (same form factor and footprint) — differing in Mounting Type, Package, Input Impedance, Architecture, Gain Range.
INA101HP
✅ Drop-InContact for price
View Datasheet →INA101AG
✅ Drop-InContact for price
View Datasheet →INA105KP
✅ Drop-InContact for price
View Datasheet →INA101HP-1 Maximum Ratings & Electrical Characteristics
| Product Type | Instrumentation amplifier |
| Amplifier Configuration | 1 circuit |
| Internal Operational Amplifier Count | 3 amplifiers |
| Gain Range | 1 V/V to 1000 V/V |
| Gain-Bandwidth Product at Unity Gain | 300 kHz |
| Input Offset Voltage | 25 uV maximum |
| Input Voltage Drift | 0.25 uV/degree C maximum |
| Low Nonlinearity | 0.002% |
| Input Noise | 13 nV/sqrt(Hz) |
| Input Impedance | 10 Gohm |
| Supply Voltage | 5 V to 20 V |
| Package Type | 14-pin PDIP |
| Mounting Type | Through-hole |
| Integrated Precision Resistors | Laser-trimmed metal-film resistors |
| RoHS Status | unknown |
| REACH Status | unknown |
INA101HP-1 14-pin pdip Pin Configuration Guide
Pin configuration for INA101HP-1 (14-pin pdip package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for INA101HP-1.
Refer to the datasheet for full pin configuration.
Typical Applications
INA101HP-1 is suitable for 6 applications: Strain-Gauge and Bridge Measurement, Precision Data-Acquisition Front End, Industrial Process-Control Sensing, Low-Level Sensor Interface, Precision Measurement and Instrumentation, Balanced Differential Signal Conditioning.
Strain-Gauge and Bridge Measurement
The INA101HP-1 fits strain-gauge bridges because its 10 Gohm input impedance limits source loading while its three-op-amp architecture rejects common-mode voltage present on both bridge inputs. The 25 uV maximum offset voltage and 0.25 uV/degree C maximum drift help preserve accuracy when the bridge output is only millivolts. Use the device at the bridge output, select a gain that keeps the result within the input and output ranges, and allow the gain bandwidth to determine the usable measurement bandwidth. The 14-pin PDIP format is useful for instrument-amplifier training boards and legacy industrial instrumentation that uses through-hole assembly.
Recommended
Precision Data-Acquisition Front End
The INA101HP-1 provides a compact analog front end for low-level differential sensor channels in data-acquisition equipment. Its 13 nV/sqrt(Hz) noise, 25 uV maximum offset voltage, and selectable gain from 1 to 1000 V/V allow a weak sensor output to be conditioned before conversion by an ADC. At unity gain, the amplifier has 300 kHz bandwidth; higher gain reduces usable bandwidth, so the complete signal chain must be checked for settling and conversion requirements. The integrated precision resistor network simplifies matching compared with a discrete three-op-amp implementation.
Recommended
Industrial Process-Control Sensing
The INA101HP-1 is suitable for process-control inputs where a small differential measurement is superimposed on a larger common-mode voltage. Its instrumentation-amplifier topology suppresses common-mode interference, while the 10 Gohm input impedance reduces errors caused by high-impedance sensors. The 0.002% low nonlinearity and 0.25 uV/degree C maximum drift are useful for calibration-sensitive measurements. In an industrial circuit, keep the input path away from motor phases and relay contacts, provide stable supply bypassing, and verify that the operating voltage remains inside the input common-mode limits.
Recommended
Low-Level Sensor Interface
The INA101HP-1 can condition outputs from low-level sensors where input impedance, offset, drift, and common-mode rejection determine measurement quality. A 10 Gohm input impedance helps prevent the amplifier from loading the sensor, and the 13 nV/sqrt(Hz) noise specification supports amplification of weak signals. Gains of 1, 10, 100, or 1000 V/V provide scaling for different sensor ranges, but bandwidth decreases as gain rises. Use short input traces, a quiet reference connection, and supply bypass capacitors placed close to the device to preserve the expected accuracy.
Recommended
Precision Measurement and Instrumentation
The INA101HP-1 supports laboratory and portable measurement systems that need accurate differential amplification without constructing three separate precision amplifiers and matched resistor networks. Its integrated laser-trimmed metal-film resistors improve repeatability, while the 25 uV maximum offset voltage limits calibration burden. The 300 kHz unity-gain bandwidth supports many sensor-bandwidth applications, although higher gains require slower settling. A through-hole PDIP package makes the device convenient for educational systems, prototype instruments, and legacy test equipment requiring socketed or through-hole assembly.
Recommended
Balanced Differential Signal Conditioning
The INA101HP-1 is appropriate for balanced inputs where unwanted common-mode energy is substantially larger than the wanted differential signal. Its internal three-precision-op-amp configuration performs differential amplification while rejecting common-mode voltage, reducing the need for separate input and subtraction stages. The 10 Gohm input impedance maintains sensor balance, and the 0.002% low nonlinearity improves amplitude fidelity. Designers should verify the selected gain against the 300 kHz unity-gain bandwidth, maintain adequate output headroom, and use the manufacturer reference configuration for the gain and reference pins.
Recommended
Recommended Products Summary
Engineering reference data for INA101HP-1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | INA101HP | INA101AG | INA105KP |
|---|---|---|---|---|
| Package | 14-pin PDIP (N) | 14-pin PDIP (N) | 14-pin ceramic DIP | 14-pin PDIP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Type | Instrumentation amplifier | Instrumentation amplifier | Instrumentation amplifier | Instrumentation amplifier |
| Gain Range | 1 V/V to 1000 V/V | 1 V/V to 1000 V/V | 1 V/V minimum | 1 V/V fixed |
| Special Feature | Selectable gain with laser-trimmed internal resistors | Selectable gain with laser-trimmed internal resistors | Ceramic-DIP environmental implementation | Unity-gain implementation |
Key Differentiators
- Selectable precision gain in one integrated instrumentation amplifier (vs INA105KP)
- Low offset and drift for low-level bridge measurements (vs INA101AG)
- Integrated matched resistor network (vs INA101HP)
Design Notes
Route the differential input pair as a compact, symmetric pair and keep it away from switching nodes, relay contacts, and high-current return paths. The 10 Gohm input impedance reduces source-loading errors, but high-impedance traces can still acquire noise if surrounded by fast edges. Connect the two inputs close to the device, avoid long exposed test pads, and use a solid ground reference beneath the input section when the board stackup permits.
Do not assume that identical 14-pin DIP outlines guarantee identical functionality. Verify the gain-selection, reference, input, output, and supply pins for every proposed substitution in its manufacturer datasheet. INA105KP is fixed at unity gain, while INA101AG changes the package material; either difference can affect whether a replacement is appropriate even when the board outline remains mechanically usable.
Select the gain based on the required sensitivity while accounting for the frequency penalty. The INA101HP-1 has 300 kHz bandwidth at unity gain, but increasing gain reduces available bandwidth and changes settling behavior. Verify sensor bandwidth, amplifier bandwidth, and ADC acquisition time together. Use the manufacturer gain tables and typical application circuit rather than choosing the largest available gain solely to maximize signal amplitude.
Provide stable supply bypassing close to the device and verify that the supply voltage remains between 5 V and 20 V under transient conditions. The instrumentation amplifier must retain input common-mode and output-swing headroom at the selected gain. If the circuit includes an excitation source or sensor return path, keep high-current returns separate from the reference and ground nodes to avoid injecting offset errors into the measured signal.
Compliance Information
The manufacturer datasheet, product page, and distributor listings do not provide a complete product-specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals statement. AEC-Q100 qualification is not applicable to this general-purpose commercial instrumentation amplifier.