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Texas Instruments OPA2994IDGKR
- Part No.:
- OPA2994IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2994IDGKR.pdf
- Description:
- DUAL, 32V, 24MHZ RRIO HIGH-OUTPU
- Quantity:
- Payment:
- Shipping:
Inventory:985
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Product details
Overview
OPA2994IDGKR from Texas Instruments is a dual-channel, 32V rail-to-rail input/output operational amplifier optimized for high-voltage industrial signal conditioning. It delivers 24MHz gain-bandwidth, ±125mA output current, 35V/µs slew rate, and unlimited capacitive load drive-enabling stable operation with up to 10µF loads in GFCI fault detection and motor control feedback loops.
For engineers reviewing the OPA2994IDGKR datasheet, OPA2994IDGKR pinout, OPA2994IDGKR application, or OPA2994IDGKR equivalent, key selection criteria include its 32V supply range, ±350µV typical offset voltage, 125dB CMRR at 32V, and VSSOP-8 package compatibility with space-constrained high-side current sensing and ADC driver designs.
Technical Context
The OPA2994IDGKR employs a dual-input-stage architecture (complementary PNP/NPN pairs) to achieve true rail-to-rail input operation across its full 2.7V–32V supply range. Its proprietary Unlimited Capacitive Load Drive (UCLD) compensation dynamically adjusts internal pole-zero placement to maintain ≥50° phase margin even when driving 10µF || 1MΩ loads.
This architecture enables robust large-signal transient response (0.43µs to 0.1%, 32V step) and eliminates need for external isolation resistors in capacitive-load applications-critical for EVSE GFCI test circuits and display panel gamma correction buffers where layout-induced capacitance varies widely.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 32V - supports direct integration into 24V industrial rails and 32V UPS power stages without level-shifting. |
| Gain-Bandwidth Product | 24MHz - enables closed-loop bandwidth >10MHz at G=2 for high-speed sensor signal conditioning. |
| Slew Rate | 35V/µs - sustains full-power bandwidth of ~560kHz at 10Vpp output, critical for fast-settling motor current loop amplifiers. |
| Output Current | ±125mA - drives heavy loads like 2kΩ display bias networks or 100nF filter caps without gain compression. |
| Input Offset Voltage | ±350µV (typ) - ensures <0.01% error in 32V-range high-side current sensing with 0.01Ω shunts. |
| CMRR | 125dB at 32V - rejects common-mode noise from switching power supplies in motor drive control modules. |
| Capacitive Load Drive | Unlimited - eliminates stability verification overhead for LCD panel source drivers with 5–15nF column-line capacitance. |
Pinout & Package
DGK package: 8-pin VSSOP (3mm × 4.9mm), thermally enhanced for dual-channel operation in compact industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Channel 1 output - directly interfaces with ADC input or MOSFET gate in active current limiting circuits. |
| 2 | IN1− | Inverting input, channel 1 - connects to shunt resistor low-side in bidirectional motor current sensing. |
| 3 | IN1+ | Noninverting input, channel 1 - accepts precision reference voltage for programmable gain instrumentation amps. |
| 4 | V− | Negative supply rail - referenced to system ground or negative rail in split-supply configurations. |
| 5 | IN2+ | Noninverting input, channel 2 - used for differential voltage monitoring in redundant power delivery systems. |
| 6 | IN2− | Inverting input, channel 2 - forms matched pair with IN2+ for high-accuracy voltage regulation feedback. |
| 7 | OUT2 | Channel 2 output - drives gate of high-side N-channel MOSFET in synchronous buck controllers. |
| 8 | V+ | Positive supply rail - accepts 24V/32V industrial bus directly; no external regulator required. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input/output | Enables full dynamic range utilization in single-supply 24V systems-no headroom loss at signal extremes. |
| Unlimited capacitive load drive | Maintains ≥50° phase margin with 10µF loads, eliminating RC snubbers in display panel gamma buffers. |
| High output current (±125mA) | Drives 2kΩ loads at 32V while maintaining rail-to-rail swing-critical for active filter stages in power delivery. |
| Low offset drift (±2.5µV/°C) | Ensures <1.5mV total offset shift over −40°C to +125°C-vital for uncalibrated industrial temperature sensors. |
| 35V/µs slew rate | Supports 0.43µs settling to 0.1% for 10V steps-meets timing requirements in real-time motor position feedback loops. |
Applications
| AC Charging Station GFCI Detection | Motor Drive Control Module |
|---|---|
Use Scenario: Detecting ground-fault leakage currents in EV charging piles using precision current transformers and integrator circuits. IC Role / Device Role / Timing Role: Dual op-amp configured as transimpedance amplifier and comparator reference buffer in real-time fault detection path. Use Value: ±125mA output drives 10µF filtering caps without oscillation; 24MHz bandwidth enables sub-100ns fault response time. | Use Scenario: Closed-loop current sensing and PWM gate driving in BLDC motor inverters. IC Role / Device Role / Timing Role: High-side current sense amplifier and gate driver buffer operating from 32V bus. Use Value: Rail-to-rail I/O captures full shunt voltage swing; 35V/µs slew rate supports 20kHz PWM edge fidelity. |
| Display Panel Gamma Correction | Server Power Delivery Monitoring |
Use Scenario: Generating precise grayscale voltages for LCD/LED backlight control in PC notebooks and monitors. IC Role / Device Role / Timing Role: Precision voltage buffer driving distributed column-line capacitance (5–15nF per segment). Use Value: Unlimited capacitive load drive eliminates need for series isolation resistors-reducing BOM count and layout complexity. | Use Scenario: Real-time monitoring of 12V/48V server PSU output rails and battery backup status. IC Role / Device Role / Timing Role: Dual-channel differential amplifier for rail voltage and current measurement feeding ADC. Use Value: 125dB CMRR rejects switching noise from adjacent DC-DC converters; 2.7V–32V operation covers all server rail voltages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage, high-output-current op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2992IDGKR | Lower 12MHz GBW, ±75mA output, same 32V supply and UCLD capability | Better suited for cost-sensitive 10MHz-bandwidth applications where 24MHz is unnecessary | Select when lower quiescent current (0.95mA vs 1.35mA) and reduced bandwidth suffice for motor control feedback. |
| LM7332MA/NOPB | 32V supply, ±80mA output, no UCLD-requires ≥10Ω isolation resistor for >1nF loads | Requires additional stability components in capacitive-load applications, increasing design risk | Choose only if legacy LM7332 footprint reuse is mandatory and load capacitance is guaranteed <1nF. |
Compared with OPA2992IDGKR and LM7332MA/NOPB, the OPA2994IDGKR uniquely combines 24MHz bandwidth, ±125mA drive, and verified 10µF capacitive load stability-making it the only option for high-speed, high-current, high-capacitance industrial signal paths without external compensation.
Availability
OPA2994IDGKR is available at Aetrix Electronics and suitable for AC charging stations, motor drive control modules, display panel gamma correction circuits, and server power delivery monitoring requiring stable component supply across extended temperature ranges.
Supply support for OPA2994IDGKR 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 high-reliability industrial op amps.
The OPAx994 product line was engineered specifically for high-voltage industrial applications demanding robust capacitive-load stability, wide supply range, and precision DC performance-targeting EVSE infrastructure, motor control, and power delivery systems.
FAQ
What is the maximum capacitive load the OPA2994IDGKR can drive without external compensation?
The OPA2994IDGKR is specified for unlimited capacitive load drive, with documented stability (≥50° phase margin) when driving 10µF loads in parallel with 1MΩ. This eliminates need for isolation resistors in applications like LCD column drivers and GFCI test circuits where board-level capacitance exceeds 100nF.
Does the OPA2994IDGKR support true rail-to-rail input operation across its full 32V supply range?
Yes, the OPA2994IDGKR features complementary PNP/NPN input stages enabling rail-to-rail common-mode input range from (V−) − 0.1V to (V+) + 0.1V at all supply voltages from 2.7V to 32V-verified in datasheet Section 5.6 under "Common-mode input voltage range".
What is the typical quiescent current per channel for the OPA2994IDGKR at 32V supply?
The OPA2994IDGKR draws 1.35mA per amplifier at 25°C and 32V supply, rising to 2.23mA maximum across −40°C to +125°C. This enables dual-channel operation in thermally constrained VSSOP-8 packages while maintaining high-speed performance.
Can the OPA2994IDGKR be used in single-supply 3.3V or 5V systems?
Yes, the OPA2994IDGKR operates down to 2.7V supply, making it compatible with 3.3V and 5V logic domains. Its rail-to-rail I/O and low 350µV offset ensure accuracy in low-voltage sensor interfaces, though full 24MHz bandwidth requires ≥5V supply per datasheet characterization conditions.
How does the OPA2994IDGKR's Unlimited Capacitive Load Drive differ from standard op amp compensation?
Unlike traditional op amps that require external isolation resistors for stability with >100pF loads, the OPA2994IDGKR uses proprietary output-stage compensation that senses load capacitance and dynamically adjusts internal poles/zeros-maintaining ≥50° phase margin up to 10µF without any external components.
OPA2994IDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- OPAx994
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Standard
- Number of Circuits:
- 2
- Output Type:
- Single Ended, Rail-to-Rail
- Slew Rate:
- 35V/µs
- Gain Bandwidth Product:
- 24 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 400 nA
- Voltage - Input Offset:
- 350 µV
- Current - Supply:
- 1.35mA (x2 Channels)
- Current - Output / Channel:
- 125 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2994IDGKR FAQ
1.How can I place an order for OPA2994IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2994IDGKR 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 OPA2994IDGKR reliable?
The price and inventory of OPA2994IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2994IDGKR is usually 5 days.
3.What payment methods are accepted for OPA2994IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2994IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2994IDGKR?
OPA2994IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2994IDGKR 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 OPA2994IDGKR?
For technical support, including OPA2994IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2994IDGKR requirements.
6.How does Aetrix verify that OPA2994IDGKR is sourced from the original manufacturer or authorized distributors?
All OPA2994IDGKR 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 OPA2994IDGKR meets industry standards.
7.What is the process for return or replacement of OPA2994IDGKR?
All OPA2994IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2994IDGKR, 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 OPA2994IDGKR part is unused and in its original packaging.
Return procedure for OPA2994IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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