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Texas Instruments OPA2828IDGNT
- Part No.:
- OPA2828IDGNT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-PowerTSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2828IDGNT.pdf
- Description:
- DUAL, HIGH-SPEED (45 MHZ AND 150
- Quantity:
- Payment:
- Shipping:
Inventory:613
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Product details
Overview
OPA2828IDGNT from Texas Instruments is a dual-channel, JFET-input operational amplifier optimized for high-precision, low-noise signal conditioning in ±4 V to ±18 V systems. It delivers 45 MHz gain bandwidth, 150 V/μs slew rate, and 60 nVRMS (0.1–10 Hz) input voltage noise - enabling accurate amplification of weak sensor or transimpedance signals in 14-bit+ data acquisition front ends.
For engineers reviewing the OPA2828IDGNT datasheet, OPA2828IDGNT pinout, OPA2828IDGNT application, or OPA2828IDGNT equivalent, key selection criteria include its 25 μV max input offset voltage (DGN package), 0.2 μV/°C drift, MUX-friendly inputs, and thermally enhanced HVSSOP-8 PowerPAD™ package with validated thermal pad grounding for leakage-sensitive high-impedance nodes.
Technical Context
The OPA2828IDGNT implements a laser-trimmed JFET input stage with phase-reversal protection, eliminating output inversion when inputs exceed common-mode limits. Its SiGe-complementary process enables simultaneous dc precision (±25 μV VOS, ±0.2 μV/°C drift) and ac performance (45 MHz GBW, 120 ns 14-bit settling).
It features an overload power limiter and internal ESD protection (±2 kV HBM), with quiescent current trimmed to 5.5 mA/channel (typ) for consistent noise and dynamic response across temperature (–40°C to +125°C) and supply (±4 V to ±18 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 45 MHz - supports stable unity-gain operation up to 45 MHz with ≥57° phase margin into 30 pF loads. |
| Slew Rate | 150 V/μs - enables full-scale 10-V step response within 120 ns for 14-bit accuracy in fast DAQ systems. |
| Input Offset Voltage | ±25 μV (max) - ensures ≤0.0004% error in ±10-V precision front ends without external trimming. |
| Offset Drift | ±0.2 μV/°C - maintains <1 μV total drift over 0–85°C ambient, critical for lab instrumentation stability. |
| Input Voltage Noise | 4 nV/√Hz @ 1 kHz / 60 nVRMS (0.1–10 Hz) - preserves SNR in low-frequency sensor interfaces like strain gauges or photodiode TIA stages. |
| Supply Range | ±4 V to ±18 V - accommodates wide-rail industrial analog I/O modules and ±15-V legacy test equipment. |
| Input Bias Current | ±0.2 pA (max) - minimizes voltage error across >1 GΩ source impedances in piezoelectric or pH sensor buffers. |
Pinout & Package
OPA2828IDGNT is housed in an 8-pin HVSSOP (DGN) package with exposed thermal pad. The package supports enhanced thermal dissipation (RθJA = 49.9°C/W) and requires soldering the thermal pad to a ground or V− plane to suppress input leakage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives load directly; requires local bypassing for stability with capacitive loads. |
| 2 | ±IN A | Inverting/noninverting inputs for Channel A - MUX-friendly architecture tolerates input overdrive without phase reversal. |
| 3 | +IN A | Noninverting input for Channel A - high-impedance JFET node (ZICM = 1012 Ω || 9 pF) minimizes loading on high-Z sources. |
| 4 | V− | Negative supply rail - must be connected; thermal pad tied here reduces input bias current leakage. |
| 5 | +IN B | Noninverting input for Channel B - independent channel enables dual-path signal conditioning without crosstalk (≥137 dB at 100 kHz). |
| 6 | ±IN B | Inverting/noninverting inputs for Channel B - identical electrical specs to Channel A for matched dual-channel performance. |
| 7 | OUT B | Amplifier B output - electrically isolated from OUT A; supports independent gain configurations per channel. |
| 8 | V+ | Positive supply rail - supplies both channels; decoupling capacitor required between V+ and V− near package. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed offset & drift | Enables guaranteed ±25 μV VOS and ±0.2 μV/°C drift without external calibration in production systems. |
| Phase-reversal protection | Prevents output inversion during input overvoltage events - eliminates need for external clamping diodes in noninverting configurations. |
| MUX-friendly inputs | Allows direct connection to multiplexer outputs without additional buffering, reducing component count in multi-channel DAQ designs. |
| Thermal pad with leakage control | Exposed pad tied to V− reduces input bias current by minimizing leakage paths - critical for sub-pA bias applications. |
| Overload power limiter | Protects internal circuitry during output short-circuit or saturation, maintaining reliability in fault-prone industrial environments. |
Applications
| High-Resolution Data Acquisition | Ultrasound Signal Conditioning |
|---|---|
|
Use Scenario: Simultaneous sampling of 16-bit ADC inputs in medical or test equipment with ±10-V full-scale range. IC Role / Device Role / Timing Role: Precision buffer and gain stage preceding SAR or sigma-delta ADC, rejecting common-mode noise while preserving small-signal integrity. Use Value: 60 nVRMS (0.1–10 Hz) noise and ±25 μV offset ensure ≤0.0004% measurement error across temperature without recalibration. |
Use Scenario: Amplifying low-amplitude, high-frequency echo signals from piezoelectric transducers in portable ultrasound scanners. IC Role / Device Role / Timing Role: Low-noise, high-speed transimpedance amplifier (TIA) and post-amplifier with 45 MHz bandwidth for 5–15 MHz echo bands. Use Value: 4 nV/√Hz input noise density and 150 V/μs slew rate preserve signal fidelity and transient response in time-of-flight measurements. |
| Lab Instrumentation Front End | Mixed-Signal I/O Module |
|
Use Scenario: DC-coupled voltage/current sourcing and sensing in benchtop power supplies or parameter analyzers requiring <1 ppm stability. IC Role / Device Role / Timing Role: Precision reference buffer and feedback amplifier in closed-loop control loops with ultra-low drift requirements. Use Value: ±0.2 μV/°C offset drift and 130 dB open-loop gain maintain accuracy over extended warm-up periods and ambient shifts. |
Use Scenario: Analog input/output conditioning in industrial PLC modules supporting AI, AO, DI, and DO functions on shared PCB real estate. IC Role / Device Role / Timing Role: Dual-channel signal conditioner handling both sensor input amplification and actuator drive signal shaping in compact form factor. Use Value: HVSSOP-8 package with thermal pad enables dual-channel operation at 5.5 mA/channel while managing thermal rise in dense mixed-signal layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision, high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189IDGNT | Lower noise (3.2 nV/√Hz), but 22 MHz GBW and higher 1.3 μV/°C drift; SOIC-8 only (no thermal pad). | Better for ultra-low-noise DC-coupled sensors; less suitable for >30 MHz signal chains or thermally constrained layouts. | Choose OPA2189IDGNT when 0.1–10 Hz noise (<40 nVRMS) dominates over speed and thermal management. |
| ADA4625-2ACPZ-R7 | Higher supply voltage (±20 V), lower input bias (0.5 pA typ), but 33 MHz GBW and no phase-reversal protection. | Preferred for ultra-high-impedance photodiode TIAs; requires external clamping if inputs exceed CM range. | Choose ADA4625-2ACPZ-R7 when operating beyond ±18 V rails or interfacing with >10 GΩ sources where bias current is limiting. |
Compared with OPA2189IDGNT and ADA4625-2ACPZ-R7, the OPA2828IDGNT uniquely balances 45 MHz bandwidth, 60 nVRMS low-frequency noise, phase-reversal immunity, and HVSSOP thermal performance - making it optimal for space-constrained, high-fidelity DAQ and medical imaging front ends.
Availability
OPA2828IDGNT is available at Aetrix Electronics and suitable for high-resolution data acquisition, ultrasound scanner signal chains, and lab instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2828IDGNT 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 op amps and high-reliability industrial components.
The OPAx828 product line was engineered to replace OPA627/OPA827 in next-generation high-speed, high-accuracy signal chains - targeting 16–18-bit mixed-signal systems, transimpedance amplifiers, and ±10-V precision front ends.
FAQ
What is the maximum supply voltage for OPA2828IDGNT?
The OPA2828IDGNT supports dual-supply operation from ±4 V to ±18 V (36 V total), with absolute maximum ratings up to ±20 V. Operation beyond ±18 V risks exceeding recommended conditions and may impact long-term reliability or parametric guarantees specified in the datasheet. Always verify thermal dissipation at maximum supply under load.
Does OPA2828IDGNT require external compensation for unity-gain stability?
No - the OPA2828IDGNT is internally compensated for unity-gain stability with ≥57° phase margin into 30 pF capacitive loads. It remains stable driving typical ADC input capacitance (≤20 pF) without added series resistance or external compensation networks, simplifying layout in high-speed DAQ designs.
How is the thermal pad of OPA2828IDGNT intended to be connected?
The exposed thermal pad on the OPA2828IDGNT HVSSOP package must be soldered to a PCB copper pour tied to V− (negative supply) or ground. This connection reduces input bias current leakage and improves thermal resistance (RθJB = 21.8°C/W). Leaving the pad floating degrades noise and drift performance.
Can OPA2828IDGNT drive heavy capacitive loads such as coaxial cables?
The OPA2828IDGNT can drive moderate capacitive loads (≤30 pF) stably in unity gain. For heavier loads like coaxial cables (>100 pF), external isolation (e.g., 25–50 Ω series resistor at output) is required to maintain phase margin and prevent overshoot - as verified in Figure 6-28 and 6-29 of the datasheet.
Is OPA2828IDGNT suitable for single-supply operation?
Yes - the OPA2828IDGNT operates from 8 V to 36 V single supply (e.g., +12 V and GND). Input common-mode range extends to (V−) + 2.5 V and (V+) − 3.5 V, allowing rail-to-rail input capability when biased appropriately. Output swing is typically within 1.2 V of each rail under 600 Ω load.
OPA2828IDGNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-PowerTSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- Single-Ended
- Slew Rate:
- 150V/µs
- Gain Bandwidth Product:
- 45 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 25 µV
- Current - Supply:
- 5.5mA (x2 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 8 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
OPA2828IDGNT FAQ
1.How can I place an order for OPA2828IDGNT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2828IDGNT 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 OPA2828IDGNT reliable?
The price and inventory of OPA2828IDGNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2828IDGNT is usually 5 days.
3.What payment methods are accepted for OPA2828IDGNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2828IDGNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2828IDGNT?
OPA2828IDGNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2828IDGNT 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 OPA2828IDGNT?
For technical support, including OPA2828IDGNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2828IDGNT requirements.
6.How does Aetrix verify that OPA2828IDGNT is sourced from the original manufacturer or authorized distributors?
All OPA2828IDGNT 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 OPA2828IDGNT meets industry standards.
7.What is the process for return or replacement of OPA2828IDGNT?
All OPA2828IDGNT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2828IDGNT, 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 OPA2828IDGNT part is unused and in its original packaging.
Return procedure for OPA2828IDGNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2828IDGNT Tags
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