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Texas Instruments INA826SIDRCT
- Part No.:
- INA826SIDRCT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
INA826SIDRCT.pdf
- Description:
- IC INST AMP 1 CIRCUIT 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,771
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Product details
Overview
INA826SIDRCT from Texas Instruments is a precision instrumentation amplifier with rail-to-rail output, 200-µA supply current, and shutdown capability. It operates from 3 V to 36 V single supply or ±1.5 V to ±18 V dual supply, delivers 104 dB min CMRR at G = 10, features 150 µV max input offset voltage, and supports gain from 1 to 1000 via a single external resistor - ideal for low-power industrial sensor signal conditioning.
For engineers reviewing the INA826SIDRCT datasheet, INA826SIDRCT pinout, INA826SIDRCT application, or INA826SIDRCT equivalent, key selection criteria include its 1 MHz bandwidth at G = 1, ±40 V input overvoltage protection, 3-mm × 3-mm VSON package, shutdown current of 2 µA, and specified operation from –40°C to +125°C in high-reliability measurement systems.
Technical Context
The INA826SIDRCT uses a three-op-amp topology with integrated 50-kΩ thin-film resistors forming a precision difference amplifier stage, enabling high common-mode rejection without external matching components. Its gain-setting architecture relies on a single external resistor (RG) between pins 2 and 3, with gain defined as G = 1 + 49.4 kΩ / RG.
RFI filters are integrated on both inputs (–IN and +IN), each comprising a 24.7-kΩ resistor and 0.1-µF capacitor, providing 20-MHz –3-dB filtering to suppress high-frequency interference before amplification. The device includes dedicated EN/ENREF enable logic referenced to an internal threshold, delivering 100-µs enable delay and robust ±40-V input fault tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 3 V to 36 V single supply or ±1.5 V to ±18 V dual supply - enables direct interfacing with 3.3-V microcontrollers and legacy 24-V industrial rails. |
| Gain Range | 1 to 1000 set by single external RG resistor - simplifies design flexibility without requiring multiple precision resistors or digital configuration. |
| CMRR | 104 dB min at G = 10, DC to 5 kHz - ensures accurate differential measurement in noisy factory environments with high common-mode transients. |
| Input Offset Voltage | 150 µV max at 25°C - supports sub-millivolt-level signal resolution in battery tester and ECG front-end applications. |
| Bandwidth | 1 MHz at G = 1, 60 kHz at G = 100 - balances speed and gain for dynamic sensor signals like strain gauge or pressure transducer outputs. |
| Shutdown Current | 2 µA max - extends battery life in portable instrumentation where periodic measurement cycles require ultra-low quiescent power. |
| Input Overvoltage Protection | ±40 V beyond supplies - eliminates need for external clamping diodes when interfacing with industrial field sensors prone to surge events. |
Pinout & Package
INA826SIDRCT is housed in a 10-pin, 3-mm × 3-mm VSON (DRC) surface-mount package with exposed thermal pad. Soldering the thermal pad to V– improves heat dissipation and ensures specified performance across temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–IN) | Negative input | Inverting input of first-stage buffer; accepts common-mode voltages from V– to (V+) – 1 V. |
| 2, 3 (RG) | Gain setting | External resistor connection points; gain = 1 + 49.4 kΩ / RG determines signal amplification ratio. |
| 4 (+IN) | Positive input | Noninverting input of first-stage buffer; matched impedance to –IN for optimal CMRR. |
| 5 (EN) | Enable control | Active-low enable referenced to ENREF; pulls supply current below 2 µA when asserted. |
| 6 (ENREF) | Enable reference | Reference node for EN threshold; must be driven between (V–) + 1.5 V and V+ for valid logic levels. |
| 7 (–VS) | Negative supply | Ground or negative rail connection; thermal pad must be connected to this node for thermal performance. |
| 8 (REF) | Reference input | Low-impedance reference point for output common-mode level; gain = 1 from REF to OUT. |
| 9 (OUT) | Amplified output | Rail-to-rail output capable of swinging within 150 mV of V+ and 100 mV of V– into 10-kΩ load. |
| 10 (+VS) | Positive supply | Positive rail connection; supports up to 36 V for wide-input-range industrial sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated RFI filters | 24.7-kΩ + 0.1-µF RC network on each input provides 20-MHz –3-dB cutoff, suppressing AM radio and switching noise before amplification. |
| Rail-to-rail output | Swings to within 100 mV of V– and 150 mV of V+ at G = 1, enabling full dynamic range utilization with 3-V microcontroller ADCs. |
| Input common-mode range | Extends from V– to (V+) – 1 V - allows direct measurement of ground-referenced shunt voltages in high-side current sensing. |
| Gain drift | 35 ppm/°C max for G > 1 - maintains calibration stability over temperature in unregulated enclosures without active thermal management. |
| ESD protection | ±2500-V HBM, ±1500-V CDM - meets industrial handling requirements without additional board-level ESD circuitry. |
Applications
| Industrial Process Controls | Battery Testers |
|---|---|
Use Scenario: Monitoring thermocouple or RTD signals in PLC analog input modules under 24-V DC field wiring conditions with high EMI. IC Role / Device Role / Timing Role: Precision instrumentation amplifier conditioning low-level differential sensor outputs while rejecting common-mode noise from motor drives and solenoids. Use Value: 104 dB CMRR at 5 kHz and ±40 V input protection ensure stable readings without external filtering or clamping components. | Use Scenario: Measuring millivolt-level voltage drops across current-sense shunts during charge/discharge cycling of Li-ion packs. IC Role / Device Role / Timing Role: High-accuracy, low-drift gain stage converting shunt voltage to ADC-compatible levels with minimal self-heating error. Use Value: 150 µV max offset and 35 ppm/°C gain drift maintain <0.1% measurement accuracy across –40°C to +85°C operating range. |
| ECG Amplifiers | Power Automation |
Use Scenario: Front-end amplification of biopotential signals from dry electrodes in portable ECG monitors with strict low-power constraints. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail instrumentation amplifier providing G = 100 gain with 18 nV/√Hz input noise and 200-µA quiescent current. Use Value: 200-µA supply current and shutdown mode (2 µA) extend battery runtime while maintaining diagnostic-grade signal fidelity. | Use Scenario: Isolated current/voltage monitoring in smart circuit breakers and energy meters interfacing with 3.3-V isolation ADCs. IC Role / Device Role / Timing Role: Robust signal conditioner accepting wide common-mode inputs (e.g., phase-to-phase voltages) and rejecting fast transients on distribution lines. Use Value: Input overvoltage tolerance up to ±40 V and integrated RFI filters eliminate need for external transient voltage suppressors or RF chokes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA333AIDRCT | Lower supply current (175 µA), lower offset (25 µV max), but narrower supply range (1.8 V to 5.5 V) and no shutdown. | Suitable only for low-voltage battery-powered devices; lacks ±40 V input protection and industrial supply compatibility. | Select when ultra-low offset and sub-2-V operation are critical, and shutdown is not required. |
| AD8421ARMZ | Higher bandwidth (10 MHz at G = 1), better CMRR (130 dB at G = 10), but higher supply current (1.2 mA) and no shutdown. | Preferred for high-speed precision applications like data acquisition systems; unsuitable for battery-constrained designs. | Select when speed and CMRR outweigh power budget constraints, and continuous operation is acceptable. |
Compared with INA333AIDRCT and AD8421ARMZ, the INA826SIDRCT uniquely balances industrial supply range (3–36 V), ±40 V input protection, 2-µA shutdown, and 104-dB CMRR - making it optimal for cost-sensitive, ruggedized measurement nodes where power, voltage range, and fault tolerance are co-prioritized.
Availability
INA826SIDRCT is available at Aetrix Electronics and suitable for industrial process controls, battery testers, ECG amplifiers, and power automation requiring stable component supply across extended temperature and voltage ranges.
Supply support for INA826SIDRCT 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision signal chain solutions.
The INA826S product line delivers low-power, high-accuracy instrumentation amplifiers optimized for industrial sensor interfaces, medical diagnostics, and portable test equipment where supply flexibility, robustness, and precision are essential.
FAQ
What is the maximum gain achievable with the INA826SIDRCT, and how is it configured?
The INA826SIDRCT supports a maximum gain of 1000, set by placing an external resistor (RG) between pins 2 and 3. The gain equation is G = 1 + 49.4 kΩ / RG; for G = 1000, RG = 49.9 Ω. This single-resistor configuration avoids complex external networks while maintaining accuracy across temperature due to the device's 35 ppm/°C gain drift specification. The INA826SIDRCT datasheet confirms this behavior across the full –40°C to +125°C range.
Does the INA826SIDRCT require external RFI filtering, or are filters integrated?
The INA826SIDRCT integrates RFI filters on both input pins (–IN and +IN), each consisting of a 24.7-kΩ resistor and 0.1-µF capacitor, providing a 20-MHz –3-dB cutoff. These on-chip filters suppress high-frequency interference before amplification, eliminating the need for discrete external RFI components in most industrial and medical applications. This integration is confirmed in the INA826SIDRCT functional block diagram and electrical characteristics table.
What is the purpose of the EN and ENREF pins on the INA826SIDRCT?
The EN (pin 5) and ENREF (pin 6) pins provide a referenced enable interface for the INA826SIDRCT shutdown function. EN is active-low and referenced to ENREF; asserting EN below (ENREF – 0.75 V) reduces supply current to ≤2 µA. ENREF must be driven between (V–) + 1.5 V and V+, enabling precise control in mixed-supply systems. This dual-pin architecture prevents false triggering and is documented in the INA826SIDRCT pin functions table.
Can the INA826SIDRCT operate from a single 3.3-V supply, and what is its output swing capability?
Yes, the INA826SIDRCT operates from a single 3.3-V supply (within its 3–36 V range) and delivers rail-to-rail output swing - typically from (V–) + 0.1 V to (V+) – 0.15 V into a 10-kΩ load. At 3.3 V, this yields ~0.1 V to 3.15 V output range, fully compatible with 3.3-V SAR or delta-sigma ADCs. This performance is verified in the INA826SIDRCT typical characteristics (Figure 12) and electrical specifications table.
How does the INA826SIDRCT handle input overvoltage conditions beyond the supply rails?
The INA826SIDRCT protects inputs against overvoltages up to ±40 V beyond the supply rails (e.g., –40 V to +76 V on a 36-V system) by limiting input current to <8 mA through internal clamping circuitry. This eliminates the need for external series resistors or TVS diodes in harsh industrial environments. The absolute maximum ratings table and description section of the INA826SIDRCT datasheet explicitly specify this ±40-V tolerance and current-limiting behavior.
INA826SIDRCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1 MHz
- Current - Input Bias:
- 35 nA
- Voltage - Input Offset:
- 40 µV
- Current - Supply:
- 200µA
- Current - Output / Channel:
- 16 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
INA826SIDRCT FAQ
1.How can I place an order for INA826SIDRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA826SIDRCT 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 INA826SIDRCT reliable?
The price and inventory of INA826SIDRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA826SIDRCT is usually 5 days.
3.What payment methods are accepted for INA826SIDRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA826SIDRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA826SIDRCT?
INA826SIDRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA826SIDRCT 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 INA826SIDRCT?
For technical support, including INA826SIDRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA826SIDRCT requirements.
6.How does Aetrix verify that INA826SIDRCT is sourced from the original manufacturer or authorized distributors?
All INA826SIDRCT 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 INA826SIDRCT meets industry standards.
7.What is the process for return or replacement of INA826SIDRCT?
All INA826SIDRCT units undergo pre-shipment inspection (PSI). If there is an issue with INA826SIDRCT, 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 INA826SIDRCT part is unused and in its original packaging.
Return procedure for INA826SIDRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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