My Inquiry
My Account
Texas Instruments INA101HP
- Part No.:
- INA101HP
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
INA101HP.pdf
- Description:
- IC INST AMP 1 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,534
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA101HP from Burr-Brown (now Texas Instruments) is a high-accuracy instrumentation amplifier optimized for low-level DC-coupled signal conditioning in precision measurement systems. It delivers 0.25µV/°C max input offset drift, 25µV max initial offset voltage, 0.002% nonlinearity, 106dB CMR at 60Hz, and 13nV/√Hz input voltage noise density at 1kHz - enabling stable amplification of thermocouple, strain gage, and RTD outputs in industrial sensor interfaces.
For engineers reviewing the INA101HP datasheet, INA101HP pinout, INA101HP application, or INA101HP equivalent, this page provides verified package mapping (14-pin plastic DIP), gain-setting resistor interface details, thermal drift behavior, common-mode rejection vs frequency curves, and validated alternative options for medical instrumentation, remote transducer, and bridge-based sensing designs.
Technical Context
The INA101HP integrates three laser-trimmed precision op amps and on-chip metal-film resistors on a monolithic IC to implement a three-op-amp instrumentation topology with fixed internal 10kΩ/20kΩ resistor networks. Gain is set externally via a single RG resistor using G = 1 + 40kΩ/RG, supporting 1× to 1000× programmable gain with <0.1% error at G=100.
Its input stage features 10¹⁰Ω || 3pF differential and common-mode impedance, while output stage delivers ±10V linear swing into 2kΩ load with 0.2V/µs min slew rate and 40µs (0.1%) settling time at G=100. The device operates from ±5V to ±20V supplies and is specified for 0°C to +70°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1× to 1000× - supports wide dynamic range in single-supply or dual-supply data acquisition front-ends. |
| Input Offset Drift | 0.25µV/°C max - ensures sub-µV thermal drift over industrial temperature range without recalibration. |
| CMR @ 60Hz | 106dB at G=100–1000 - rejects line-frequency interference in noisy plant-floor environments. |
| Nonlinearity | 0.002% of p-p FS - preserves fidelity of small-signal transducer outputs without harmonic distortion. |
| Input Voltage Noise | 13nV/√Hz at 1kHz - enables resolution of µV-level signals in 100Hz–10kHz bandwidth applications. |
| Supply Range | ±5V to ±20V - accommodates legacy ±15V systems and low-voltage embedded designs. |
| Quiescent Current | ±6.7mA typ - balances low power consumption with high-speed settling performance. |
Pinout & Package
INA101HP is supplied in a 14-pin plastic dual in-line package (PDIP, package drawing N), with 0.300" wide body and standard through-hole footprint compatible with JEDEC MS-001. Pin 1 is marked by notch or dot; pins are numbered counter-clockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output | Differential output node referenced to Common pin; drives external ADC or filter stage. |
| 2 | +VCC | Positive supply connection; requires local 1µF tantalum decoupling per datasheet Figure 1. |
| 3 | –Input | Inverting input of first-stage differential pair; connects to negative leg of bridge or thermocouple. |
| 4 | Gain Sense 1 | Feedback sense point for gain-setting resistor RG; reduces wiring resistance error at high gains. |
| 5 | Gain Set 1 | First terminal of external RG resistor; forms part of precision 40kΩ feedback network. |
| 6 | Offset Adj. | Input offset trim input; used with 100kΩ potentiometer to null offset at G ≥ 100. |
| 7 | Offset Adj. | Second input offset trim terminal; completes balanced adjustment circuit per Figure 2. |
| 8 | Common | Output reference node; must be low-impedance ground path (<0.1Ω) to maintain CMR >106dB. |
| 9 | –VCC | Negative supply connection; symmetric decoupling required for optimal PSRR. |
| 10 | +Input | Non-inverting input of first-stage differential pair; connects to positive leg of transducer. |
| 11 | Gain Sense 2 | Second feedback sense point; enables Kelvin connection to RG for <0.01% gain accuracy. |
| 12 | Gain Set 2 | Second RG terminal; completes external gain resistor loop with internal 40kΩ sum. |
| 13 | A2 Output | Internal op amp A2 output; not user-accessible in standard configuration. |
| 14 | A1 Output | Internal op amp A1 output; not user-accessible in standard configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed resistor network | On-chip 10kΩ/20kΩ metal-film resistors trimmed to <0.01% absolute tolerance, eliminating external gain resistor drift contribution at G=10. |
| Dual gain-sense inputs | Pins 4 & 11 provide Kelvin connections to RG, reducing gain error from socket/wiring resistance to <0.005% at G=1000. |
| Low thermal EMF package | Plastic DIP construction minimizes thermocouple voltages at lead-frame junctions, critical for <1µV offset stability. |
| Output-referenced common mode | Common pin defines output reference; allows floating sensor grounds while maintaining >100dB CMR up to 1kHz. |
| Two-stage offset trimming | Separate input (Pins 6–7) and output (Common pin) trim paths enable independent nulling of amplifier and system offsets. |
Applications
| Strain Gage Bridge Interface | Thermocouple Signal Conditioning |
|---|---|
Use Scenario: Amplifying mV-level differential output from full-bridge strain gages in load cells or pressure sensors under varying ambient temperatures. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing programmable gain, high CMR, and ultra-low drift to resolve microstrain changes. Use Value: Enables 16-bit+ effective resolution without external chopper stabilization, leveraging 0.25µV/°C drift and 106dB CMR at 60Hz. | Use Scenario: Cold-junction compensated amplification of Type-K thermocouple outputs (≈41µV/°C) across –200°C to +1372°C range. IC Role / Device Role / Timing Role: Low-noise, high-input-impedance front-end that rejects EMI and maintains linearity over wide temperature gradients. Use Value: Delivers 0.002% nonlinearity and 13nV/√Hz noise density to support ±0.5°C accuracy in medical or lab-grade temperature recorders. |
| RTD Temperature Sensing | Medical Bio-Potential Acquisition |
Use Scenario: Exciting 100Ω Pt RTDs with constant current and amplifying resulting voltage drop in HVAC or process control transmitters. IC Role / Device Role / Timing Role: High-common-mode rejection amplifier rejecting ground-loop noise from 4–20mA loop-powered sensors. Use Value: Achieves <0.01°C repeatability using 10¹⁰Ω input impedance to prevent RTD self-heating errors and 25µV max offset for zero-point calibration. | Use Scenario: Front-end amplification of ECG/EEG signals (0.1–5mV, <100Hz) in portable patient monitors with battery-powered operation. IC Role / Device Role / Timing Role: Low-power, low-noise instrumentation amplifier meeting IEC 60601-2-27 immunity requirements for medical devices. Use Value: Supports 100dB SNR at 1Hz with ±6.7mA quiescent current, enabling >8-hour battery life in Class II wearable diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA128P | Lower quiescent current (±350µA), wider supply range (±2.25V to ±18V), but higher offset drift (0.3µV/°C) and lower CMR (100dB @ 60Hz). | Better suited for battery-powered portable instruments where power budget is tighter than precision requirement. | Select INA128P when operating from single 5V rail or requiring <1mW total power; retain INA101HP for lab-grade metrology where drift and CMR dominate. |
| AD620ANZ | Higher noise (21nV/√Hz), lower CMR (93dB @ 60Hz), but superior gain accuracy (±0.15% vs ±0.3% for INA101HP at G=100). | Preferred in cost-sensitive industrial PLC analog input modules where moderate noise floor is acceptable. | Choose AD620ANZ for high-volume production with tight BOM cost targets; use INA101HP where 13nV/√Hz noise and 106dB CMR are mandatory for sensor fusion algorithms. |
Compared with INA128P and AD620ANZ, the INA101HP offers the lowest input offset drift and highest CMR in its class - making it irreplaceable in applications demanding long-term DC stability and immunity to 50/60Hz interference without external filtering.
Availability
INA101HP is available at Aetrix Electronics and suitable for strain gage interfaces, thermocouple signal conditioning, RTD temperature sensing, and medical bio-potential acquisition requiring stable component supply across extended product lifecycles.
Supply support for INA101HP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Burr-Brown Corporation, acquired by Texas Instruments in 2000, specialized in high-precision analog ICs for test and measurement, industrial automation, and medical instrumentation.
The INA101HP belongs to Burr-Brown's legacy high-accuracy instrumentation amplifier family, designed specifically for DC-stable amplification of microvolt-level transducer outputs in harsh electromagnetic environments.
FAQ
What is the maximum recommended gain-setting resistor (RG) value for stable operation of the INA101HP?
The INA101HP supports RG values from 40Ω (G=1001) to 40kΩ (G=2). For stable phase margin and minimal noise contribution, Burr-Brown recommends RG ≥ 200Ω - corresponding to G ≤ 201. At G=1000 (RG=40Ω), layout parasitics and wiring resistance become significant; use Kelvin connections to Pins 4/11 and minimize trace length. The INA101HP datasheet specifies gain error increases to ±0.3% at G=1000 due to RG tolerance and thermal EMF effects.
Can the INA101HP operate from a single +5V supply?
No, the INA101HP requires dual ±VCC supplies and is not rated for single-supply operation. Its input common-mode range is specified as ±10V with ±15V supplies, and absolute maximum supply is ±20V. Attempting single +5V operation violates the minimum ±5V dual-rail requirement and will result in clipping, reduced CMR, and potential damage to internal bias networks. For single-supply designs, consider TI's INA333 or ADI's AD8421 as functional alternatives with rail-to-rail output and extended common-mode range.
How does the Common pin function in the INA101HP, and what happens if it is not grounded?
The Common pin in the INA101HP defines the output reference voltage and must be connected to a low-impedance ground (≤0.1Ω series resistance) to maintain specified CMR >106dB. If left floating or connected through high impedance, common-mode rejection degrades sharply - dropping to <65dB at 60Hz per datasheet Table 1. This pin also serves as the output offset trim node; applying a voltage here sums directly with the output. In the INA101HP, improper Common pin routing is the most frequent cause of unexplained 60Hz pickup in precision sensor systems.
What is the purpose of the two Offset Adjust pins (6 and 7) on the INA101HP, and how should they be used?
Pins 6 and 7 on the INA101HP form a differential input for an external 100kΩ potentiometer to null input offset voltage - primarily needed at gains ≥100 where 25µV offset becomes significant. The wiper connects to Pin 6, one end to Pin 7, and the other to +VCC. Do not use this adjustment to null source or system offset, as it adds 0.3µV/°C drift per 100µV adjusted. For INA101HP applications requiring zero-drift performance, laser-trimming during manufacture renders external adjustment unnecessary in >90% of use cases.
Is the INA101HP RoHS compliant, and what is its moisture sensitivity level (MSL)?
Yes, the INA101HP is RoHS compliant (lead-free NiPdAu finish) and classified as MSL N/A for its PDIP package - meaning it is not moisture-sensitive and does not require dry-pack or baking prior to soldering. Per TI's packaging addendum, the INA101HP uses NIPDAU lead finish and has no reflow temperature restriction. This makes it suitable for wave soldering, hand soldering, and vapor-phase reflow without preconditioning, unlike its SOIC variant INA101KU which carries MSL Level-3 rating.
INA101HP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 300 kHz
- Current - Input Bias:
- 15 nA
- Voltage - Input Offset:
- 125 µV
- Current - Supply:
- 6.7mA
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 40 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
INA101HP FAQ
1.How can I place an order for INA101HP through Aetrix?
Please submit a Request for Quotation (RFQ) for INA101HP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for INA101HP reliable?
The price and inventory of INA101HP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA101HP is usually 5 days.
3.What payment methods are accepted for INA101HP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA101HP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA101HP?
INA101HP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA101HP order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for INA101HP?
For technical support, including INA101HP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA101HP requirements.
6.How does Aetrix verify that INA101HP is sourced from the original manufacturer or authorized distributors?
All INA101HP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that INA101HP meets industry standards.
7.What is the process for return or replacement of INA101HP?
All INA101HP units undergo pre-shipment inspection (PSI). If there is an issue with INA101HP, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The INA101HP part is unused and in its original packaging.
Return procedure for INA101HP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA101HP Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
