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Texas Instruments INA2332AIPWTG4
- Part No.:
- INA2332AIPWTG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
INA2332AIPWTG4.pdf
- Description:
- IC INST AMP 2 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,164
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Product details
Overview
INA2332AIPWTG4 from Texas Instruments is a dual-channel, rail-to-rail output, low-power CMOS instrumentation amplifier configured with internal gain of 5 V/V and optimized for single-supply operation from +2.7 V to +5.5 V. It delivers 2.0 MHz bandwidth, 5 V/µs slew rate, 73 dB DC CMRR, 0.5 pA input bias current, and 415 µA per-channel quiescent current - enabling high-precision sensor signal conditioning in battery-powered industrial and medical systems.
For engineers reviewing the INA2332AIPWTG4 datasheet, INA2332AIPWTG4 pinout, INA2332AIPWTG4 application, or INA2332AIPWTG4 equivalent, key selection criteria include its TSSOP-14 package, dual-channel architecture, shutdown capability (0.01 µA), wide –55°C to +125°C operating range, and external gain-setting flexibility beyond G = 5 via R₂/R₁ resistors.
Technical Context
The INA2332AIPWTG4 implements a modified two-op-amp instrumentation amplifier topology with an added third gain stage, enabling precise differential-to-single-ended conversion while maintaining rail-to-rail output swing at gains ≥10. Its CMOS input stage achieves ultra-low input bias current (0.5 pA typ) and high input impedance (10¹³ Ω || 3 pF), making it suitable for high-impedance bridge and RTD sensors.
Internal gain is fixed at 5 V/V but scalable using external resistors per G = 5 + 5(R₂/R₁), supporting programmable gains from 5 to 1000 V/V. The device features independent shutdown control per channel, microsecond-scale wake-up time, and robust ESD protection with diode-clamped inputs rated for ±0.5 V beyond supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7 V to +5.5 V - supports direct integration into 3.3 V and 5 V embedded systems without level-shifting. |
| Gain Accuracy (G = 5) | ±0.07% max - ensures minimal calibration burden in precision measurement applications like field utility meters. |
| Bandwidth (G = 25) | 2.0 MHz - sufficient for driving sampling ADCs up to ~100 kSPS with <0.1% settling error. |
| Input Bias Current | ±0.5 pA typ - enables use with >1 MΩ source impedances (e.g., thermocouples, pH electrodes) without significant offset drift. |
| CMRR (DC) | 73 dB min - rejects common-mode noise from 50/60 Hz line interference in industrial sensor front-ends. |
| Quiescent Current / Chan | 415 µA max - allows multichannel monitoring in portable ECG or IoT edge nodes with constrained power budgets. |
| Operating Temperature | –55°C to +125°C - qualified for under-hood automotive instrumentation and harsh-environment industrial control. |
Pinout & Package
TSSOP-14 (PW) package: 5.0 mm × 4.4 mm × 1.2 mm body, 0.65 mm pitch, surface-mount, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 14 | Shutdown A / Shutdown B | Digital enable inputs; pull below 0.8 V (at V+ = 5 V) to place respective channel in 0.01 µA sleep mode. |
| 2, 13 | VOUTA / VOUTB | Amplified outputs referenced to respective REF pins; rail-to-rail swing (to within 25 mV of rails at G ≥ 10, RL ≥ 10 kΩ). |
| 3, 12 | REFA / REFB | Output reference terminals; define zero-output voltage level and affect common-mode input range (VOA2 < V+ – 1.2 V required). |
| 4, 11 | V+ | Positive supply rail; requires local 0.1 µF decoupling capacitor for noise immunity in high-impedance sensor interfaces. |
| 5, 10 | V– | Negative supply rail; tied to ground in single-supply configurations; must be stable and low-impedance. |
| 6, 9 | VIN+A / VIN+B | Non-inverting inputs; high-impedance CMOS nodes requiring bias current return paths (e.g., matched resistors to REF or V–). |
| 7, 8 | VIN–A / VIN–B | Inverting inputs; paired with VIN+ for differential signal acquisition; share same common-mode rejection behavior as non-inverting inputs. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Swings to within 25 mV of V+ and V– at G ≥ 10 and RL ≥ 10 kΩ - eliminates need for output level-shifting before ADC input stages. |
| Ultra-low input bias current | 0.5 pA typical - minimizes voltage drop across high-impedance sensor elements (e.g., piezoresistive bridges), preserving signal integrity. |
| Programmable gain architecture | G = 5 + 5(R₂/R₁) - enables accurate gain scaling beyond 5 V/V using standard 0.1% tolerance resistors without redesigning amplifier core. |
| Wide temperature specification | –55°C to +125°C operating range - supports deployment in automotive engine control units and downhole oilfield equipment. |
| Independent per-channel shutdown | Two dedicated shutdown pins (pins 1 & 14) - allows dynamic power gating of individual channels in multiplexed data acquisition systems. |
Applications
| Industrial Sensor Amplification | Physiological Signal Acquisition |
|---|---|
Use Scenario: Amplifying millivolt-level differential signals from strain-gauge load cells in factory-floor weighing systems operating at 60 Hz line frequency. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier providing simultaneous, isolated amplification of two bridge sensors with shared reference and independent shutdown. Use Value: 73 dB DC CMRR and 50 dB CMRR at 45 kHz suppress mains harmonics; 2.0 MHz bandwidth supports fast transient detection during material handling events. | Use Scenario: Front-end amplification of bipolar ECG signals (±5 mV) in portable fitness monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-noise, low-power dual IA acquiring lead-I and lead-II signals with independent shutdown to extend battery life between measurements. Use Value: 415 µA/channel quiescent current and microsecond wake-up enable duty-cycled operation; 0.5 pA bias current prevents electrode polarization artifacts. |
| ADC Signal Conditioning | Field Utility Metering |
Use Scenario: Driving the analog input of a 12-bit SAR ADC (e.g., ADS7818) in a battery-operated environmental sensor node measuring temperature and humidity. IC Role / Device Role / Timing Role: Precision gain stage with rail-to-rail output directly interfacing capacitive-input ADC, eliminating external buffer requirements. Use Value: 5 V/µs slew rate and 1.7 µs 0.1% settling time ensure accurate sampling at 100 kSPS; low output impedance maintains stability into ADC's switched-capacitor input. | Use Scenario: Isolating and amplifying current-sense shunt voltages in Class 0.5 smart electricity meters deployed in outdoor distribution cabinets. IC Role / Device Role / Timing Role: Dual IA channel processing phase-current and neutral-current signals with laser-trimmed gain accuracy (±0.07%) for metrology-grade linearity. Use Value: ±2 mV input offset voltage and ±5 µV/°C drift meet IEC 62053-21 accuracy requirements over –25°C to +70°C extended ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA2332AIPWR | Same die, identical electrical specs, TSSOP-14 package, 2500-unit tape-and-reel vs 250-unit for INA2332AIPWTG4 | No functional difference; suited for high-volume production runs where reel size impacts assembly logistics | Select INA2332AIPWR when optimizing for cost-per-unit in large-batch manufacturing with compatible pick-and-place feeders. |
| INA332AIDGKTG4 | Single-channel version in MSOP-8 (DGK); same gain accuracy, bandwidth, and quiescent current; lacks second channel and dual shutdown pins | Applicable only where space-constrained PCBs require single-channel amplification without multiplexing needs | Choose INA332AIDGKTG4 for compact, single-sensor designs where board area is critical and dual-channel functionality is unnecessary. |
Compared with INA2332AIPWR, the INA2332AIPWTG4 offers identical performance in a smaller 250-unit reel ideal for prototyping and low-volume production; versus INA332AIDGKTG4, it provides true dual-channel parallel acquisition capability essential for multi-sensor systems without doubling component count or layout area.
Availability
INA2332AIPWTG4 is available at Aetrix Electronics and suitable for industrial sensor amplification, physiological signal acquisition, and ADC signal conditioning requiring stable component supply across automotive, medical, and energy metering programs.
Supply support for INA2332AIPWTG4 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 INA2332AIPWTG4 belongs to TI's low-power instrumentation amplifier product line, designed specifically for high-accuracy, low-quiescent-current signal conditioning in battery-operated and thermally demanding environments.
FAQ
What is the maximum gain achievable with the INA2332AIPWTG4?
The INA2332AIPWTG4 supports externally programmable gains from 5 V/V to 1000 V/V using the equation G = 5 + 5(R₂/R₁). At G = 1000, the required R₂/R₁ ratio is 199; practical implementation requires careful resistor matching and layout to maintain gain accuracy and stability, especially above 100 V/V where noise and bandwidth trade-offs become significant. The INA2332AIPWTG4 datasheet confirms this range under Electrical Characteristics.
Does the INA2332AIPWTG4 support single-supply operation?
Yes, the INA2332AIPWTG4 is fully specified for single-supply operation from +2.7 V to +5.5 V. Its rail-to-rail output stage and input common-mode range extending to within 0.35 V of V– (at 2.7 V supply) allow direct interface with grounded-sensor bridges and unipolar ADCs. Reference voltage (REF) must be set ≥1.2 V below V+ for proper operation, as detailed in the Applications Information section of the INA2332AIPWTG4 datasheet.
How does the shutdown feature work on the INA2332AIPWTG4?
The INA2332AIPWTG4 has two independent shutdown pins (pins 1 and 14) - one per channel. Pulling either pin below 0.8 V (with V+ = 5 V) places the corresponding amplifier channel into sleep mode, reducing quiescent current to 0.01 µA. Wake-up occurs within microseconds upon returning the pin to V+. This feature is validated in the Typical Characteristics curves for INA2332AIPWTG4, including Shutdown Transient Behavior and Quiescent Current vs Shutdown Voltage.
What is the input common-mode voltage range for the INA2332AIPWTG4?
At V+ = 5 V, the input common-mode voltage range for the INA2332AIPWTG4 is 0.55 V to 3.8 V; at V+ = 2.7 V, it is 0.35 V to 1.5 V. The upper limit is constrained by the second-stage amplifier's headroom (V+ – 1.2 V), while the lower limit depends on REF voltage and is defined by VOA1 = 5/4·VCM – 1/4·VREF. These values are measured and guaranteed per the Electrical Characteristics table in the INA2332AIPWTG4 datasheet.
Can the INA2332AIPWTG4 drive capacitive loads directly?
The INA2332AIPWTG4 can drive capacitive loads up to 100 pF while maintaining stability and specified settling time (1.7 µs at 0.1%). For larger loads (e.g., >100 pF), external compensation - such as a feedback capacitor across RG or addition of series resistance (RX) - is recommended, as shown in Figure 8 of the INA2332AIPWTG4 datasheet. Driving high-capacitance ADC inputs (e.g., 20–50 pF) is supported without buffering, but >100 pF requires layout or external network optimization.
INA2332AIPWTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 2 MHz
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 415µA (x2 Channels)
- Current - Output / Channel:
- 48 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
INA2332AIPWTG4 FAQ
1.How can I place an order for INA2332AIPWTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA2332AIPWTG4 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 INA2332AIPWTG4 reliable?
The price and inventory of INA2332AIPWTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA2332AIPWTG4 is usually 5 days.
3.What payment methods are accepted for INA2332AIPWTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA2332AIPWTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA2332AIPWTG4?
INA2332AIPWTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA2332AIPWTG4 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 INA2332AIPWTG4?
For technical support, including INA2332AIPWTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA2332AIPWTG4 requirements.
6.How does Aetrix verify that INA2332AIPWTG4 is sourced from the original manufacturer or authorized distributors?
All INA2332AIPWTG4 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 INA2332AIPWTG4 meets industry standards.
7.What is the process for return or replacement of INA2332AIPWTG4?
All INA2332AIPWTG4 units undergo pre-shipment inspection (PSI). If there is an issue with INA2332AIPWTG4, 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 INA2332AIPWTG4 part is unused and in its original packaging.
Return procedure for INA2332AIPWTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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