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Texas Instruments INA823DGKT
- Part No.:
- INA823DGKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA823DGKT.pdf
- Description:
- PRECISION (100 UV), LOW-POWER (2
- Quantity:
- Payment:
- Shipping:
Inventory:404
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Product details
Overview
INA823DGKT from Texas Instruments is a precision instrumentation amplifier optimized for low-power, wide-supply (2.7 V to 36 V single or ±1.35 V to ±18 V dual) operation in high-accuracy sensor signal conditioning. It delivers 20 µV typical input offset voltage, 180 µA quiescent current, 84 dB min CMRR at G = 1, and stable 1-nF capacitive load drive-enabling use in battery-powered ECG monitors, infusion pumps, and industrial weigh scales.
For engineers reviewing the INA823DGKT datasheet, INA823DGKT pinout, INA823DGKT application, or INA823DGKT equivalent, this page provides verified technical context, gain-dependent bandwidth (1.9 MHz at G = 1, 60 kHz at G = 100), input overvoltage protection (±60 V), rail-to-rail output swing capability, and real-world application constraints for medical and process analytics systems.
Technical Context
The INA823DGKT employs a three-op-amp topology with integrated overvoltage protection circuitry on both inputs, enabling robust operation when interfacing with sensors exposed to transients up to ±60 V beyond supply rails. Its input stage extends 150 mV below negative supply, supporting true single-supply operation down to 2.7 V.
Gain is set externally via a single resistor (RG) between pins 1 and 8, supporting 1–10,000× range per equation G = 1 + 100 kΩ/RG. The device maintains ≥120 dB CMRR at G ≥ 100 across –40°C to +125°C, with input voltage noise of 21 nV/√Hz and 0.9 V/µs slew rate at G = 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.7 V to 36 V single supply or ±1.35 V to ±18 V dual supply - enables direct integration into 3.3-V IoT nodes and 24-V industrial PLC analog inputs. |
| Input Offset Voltage | 20 µV typ / 100 µV max - ensures sub-0.01% error in 10-mV full-scale bridge sensor outputs without trimming. |
| CMRR (G = 100) | 120 dB min - rejects >99.9999% of common-mode interference in noisy motor-drive environments. |
| Bandwidth (G = 100) | 60 kHz - supports accurate acquisition of 50-Hz/60-Hz line-frequency signals with >10× oversampling margin. |
| Quiescent Current | 180 µA typ - allows continuous operation for >1 year on a 200-mAh coin cell in wearable fitness monitors. |
| Input Overvoltage Protection | ±60 V - eliminates need for external clamping diodes when interfacing with industrial 4–20 mA transmitters. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and factory-floor process analytics applications. |
Pinout & Package
INA823DGKT is packaged in an 8-pin VSSOP (DGK) with 3.00 mm × 3.00 mm body size and 0.65-mm lead pitch, optimized for space-constrained portable medical devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | RG | Gain-setting terminals; connect external resistor to define gain per G = 1 + 100 kΩ/RG - no internal resistor required. |
| 2 | –IN | Inverting input; protected against ±60 V overvoltage - accepts differential signals from strain gauges or RTDs without external protection. |
| 3 | +IN | Noninverting input; same overvoltage rating as –IN - enables symmetric high-impedance sensor interface. |
| 4 | –VS | Negative supply pin; supports operation down to –1.35 V - required for dual-supply configurations or biasing reference levels. |
| 5 | REF | Reference input; driven by low-impedance source to set output common-mode level - critical for ratiometric ADC interfacing. |
| 6 | OUT | Amplified output; stable with 1-nF capacitive loads - drives long traces or ADC input filters directly without isolation buffers. |
| 7 | +VS | Positive supply pin; accepts up to +36 V - simplifies power architecture in multi-rail industrial systems. |
Key Features
| Feature | Design Value |
|---|---|
| Input Overvoltage Protection | ±60 V on both inputs - removes need for external TVS diodes in field-deployed flow transmitters. |
| Wide Common-Mode Input Range | Extends 150 mV below negative supply - enables direct sensing of ground-referenced shunt resistors in low-side current monitoring. |
| Low Power Consumption | 180 µA supply current - supports always-on physiological monitoring in battery-operated wearables. |
| High CMRR at High Gain | 120 dB minimum at G ≥ 100 - preserves microvolt-level signal integrity in pH and gas concentration analyzers. |
| Single Resistor Gain Programming | G = 1 + 100 kΩ/RG - reduces BOM count and layout complexity versus fixed-gain alternatives. |
Applications
| ECG Monitoring System | Industrial Weigh Scale |
|---|---|
|
Use Scenario: Amplifying low-amplitude (0.5–2 mV), high-impedance biopotential signals from dry electrodes in portable ECG patches. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing programmable gain (G = 100–500), high CMRR rejection of 50/60 Hz mains interference, and rail-to-rail output compatible with 16-bit SAR ADCs. Use Value: 21 nV/√Hz input voltage noise and 120 dB CMRR at G = 100 ensure diagnostic-grade waveform fidelity without post-processing filtering. |
Use Scenario: Conditioning millivolt-level outputs from load-cell bridges in factory-floor weighing platforms operating at 24 V DC. IC Role / Device Role / Timing Role: Low-drift, wide-supply instrumentation amplifier with ±60 V input protection - interfaces directly with unshielded 10-m cable runs in electrically noisy environments. Use Value: 100 µV max offset and 0.2 ppm/°C gain drift maintain calibration stability across ambient temperature swings from –10°C to +50°C. |
| Infusion Pump Pressure Sensing | Blood Glucose Monitor |
|
Use Scenario: Amplifying differential pressure signals from MEMS sensors measuring fluid flow rates in medical infusion pumps. IC Role / Device Role / Timing Role: Low-power (180 µA), wide-temperature (–40°C to +125°C) instrumentation amplifier driving low-voltage ADCs in compact, sealed pump housings. Use Value: Stable 1-nF capacitive load drive eliminates external buffer stages, reducing PCB area and component count in Class II medical devices. |
Use Scenario: Amplifying amperometric current from glucose oxidase electrochemical sensors in handheld point-of-care meters. IC Role / Device Role / Timing Role: Precision, low-bias-current (8 nA max) amplifier with extended input common-mode range - accommodates varying sensor electrode potentials during test strip insertion. Use Value: Input voltage extending 150 mV below negative supply enables accurate zero-current baseline measurement without negative rail generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA826DGKT | Higher quiescent current (200 µA vs. 180 µA), rail-to-rail output (INA823 is not RRO), same gain equation and package. | Preferred where output must swing to within 10 mV of supply rails - e.g., 3.3-V ADC interfacing with limited headroom. | Select INA826DGKT only if rail-to-rail output is mandatory; otherwise INA823DGKT offers lower power and identical precision specs. |
| INA819IDGKT | Lower input voltage noise (8 nV/√Hz vs. 21 nV/√Hz), same 180 µA IQ, 35 µV max VOS (vs. 100 µV), same SOIC/VSSOP packaging. | Better suited for ultra-low-noise applications like EEG or high-resolution weigh scales requiring <1 µVpp noise floor. | Choose INA819IDGKT when noise dominates error budget; INA823DGKT remains optimal for cost-sensitive, general-purpose precision sensing with overvoltage robustness. |
Compared with INA826DGKT and INA819IDGKT, the INA823DGKT uniquely balances ±60 V input overvoltage protection, 180 µA power, and 100 µV max offset in a single VSSOP package - making it the preferred choice for ruggedized, battery-efficient medical and industrial front-ends where transient immunity and longevity are critical.
Availability
INA823DGKT is available at Aetrix Electronics and suitable for ECG monitoring systems, infusion pumps, industrial weigh scales, and blood glucose meters requiring stable component supply across automotive, medical, and industrial temperature ranges.
Supply support for INA823DGKT 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 INA823DGKT belongs to TI's precision instrumentation amplifier product line, engineered specifically for low-power, wide-supply, high-CMRR sensor signal conditioning in medical diagnostics, industrial process control, and portable instrumentation.
FAQ
What is the maximum gain achievable with the INA823DGKT?
The INA823DGKT supports gains from 1 to 10,000 using a single external resistor (RG) between pins 1 and 8, per the equation G = 1 + 100 kΩ/RG. At G = 10,000, the bandwidth reduces to 6 kHz, and gain error increases to ±0.2%; for optimal accuracy and stability, gains ≤1000 are recommended. The INA823DGKT datasheet specifies performance across this full range under defined operating conditions.
Does the INA823DGKT require external components for basic operation?
Yes - the INA823DGKT requires an external gain-setting resistor (RG) between pins 1 and 8 to define amplification, and the REF pin must be driven by a low-impedance source (e.g., voltage divider or op-amp buffer) to set output common-mode level. No external compensation or protection components are needed due to its integrated ±60 V input overvoltage protection and 1-nF capacitive load stability.
Can the INA823DGKT operate from a single 3.3-V supply?
Yes - the INA823DGKT is fully specified for single-supply operation from 2.7 V to 36 V. At 3.3 V, it maintains 180 µA quiescent current, 100 µV max input offset, and 84 dB min CMRR at G = 1. Input common-mode range extends to –0.15 V (150 mV below ground), enabling direct interface with ground-referenced sensors, and output swing reaches within 150 mV of each rail.
How does the INA823DGKT handle input overvoltage conditions?
The INA823DGKT integrates robust input overvoltage protection circuitry on both +IN and –IN pins, rated for continuous exposure to ±60 V beyond the supply rails. This eliminates the need for external clamping diodes or series resistors in harsh environments such as industrial 4–20 mA loop interfaces or motor-drive current sensing, preserving signal integrity while protecting downstream circuitry.
Is the INA823DGKT pin-compatible with other TI instrumentation amplifiers?
No - the INA823DGKT uses a unique 8-pin VSSOP (DGK) pinout where RG is split across pins 1 and 8, unlike the INA826 or INA819 which place RG on pins 1 and 8 or 1 and 8 in alternate configurations. Direct substitution is not possible without PCB revision; however, functional equivalents exist with different pin mappings and minor specification trade-offs.
INA823DGKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.9V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1.2 nA
- Voltage - Input Offset:
- 20 µV
- Current - Supply:
- 180µA
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
INA823DGKT FAQ
1.How can I place an order for INA823DGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA823DGKT 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 INA823DGKT reliable?
The price and inventory of INA823DGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA823DGKT is usually 5 days.
3.What payment methods are accepted for INA823DGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA823DGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA823DGKT?
INA823DGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA823DGKT 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 INA823DGKT?
For technical support, including INA823DGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA823DGKT requirements.
6.How does Aetrix verify that INA823DGKT is sourced from the original manufacturer or authorized distributors?
All INA823DGKT 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 INA823DGKT meets industry standards.
7.What is the process for return or replacement of INA823DGKT?
All INA823DGKT units undergo pre-shipment inspection (PSI). If there is an issue with INA823DGKT, 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 INA823DGKT part is unused and in its original packaging.
Return procedure for INA823DGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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