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Texas Instruments OPA625IDBVT
- Part No.:
- OPA625IDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
OPA625IDBVT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:766
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Product details
Overview
OPA625IDBVT from Texas Instruments is a high-bandwidth, low-THD+N, power-scalable operational amplifier optimized as a precision driver for 16-bit and 18-bit SAR ADCs such as the ADS8860. It delivers 120 MHz gain-bandwidth, 115 V/µs slew rate, and 280 ns 16-bit settling time with ±100 µV max offset voltage and 2.5 nV/√Hz input voltage noise at 10 kHz.
For engineers reviewing the OPA625IDBVT datasheet, OPA625IDBVT pinout, OPA625IDBVT application, or OPA625IDBVT equivalent, key selection criteria include dual-mode operation (high-drive vs. low-power), ultrafast mode transition (170 ns), rail-to-rail output, and guaranteed performance from –40°C to +125°C in the 6-pin SOT-23 package.
Technical Context
The OPA625IDBVT implements a dual-mode architecture where the MODE pin selects between high-drive mode (GBW = 120 MHz, IQ = 2 mA) and low-power mode (GBW = 1 MHz, IQ = 270 µA), enabling dynamic power scaling without external reconfiguration. Its input stage supports rail-to-rail common-mode range down to the negative rail, and its output drives capacitive loads up to 20 pF while maintaining stability.
It features a fully differential input topology with 47 MΩ || 1.5 pF common-mode input impedance and 27 kΩ || 1.2 pF differential input impedance. The device achieves –122 dBc HD2 and –140 dBc HD3 at 100 kHz in high-drive mode, meeting stringent distortion requirements for high-resolution data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product (HD mode) | 120 MHz - enables stable G ≥ 100 closed-loop gain with phase margin ≥ 50° for driving fast SAR ADCs |
| Slew rate (HD mode) | 115 V/µs - ensures full-scale step response within 4-V output swing without slewing-induced distortion |
| 16-bit settling time | 280 ns - guarantees accurate sampling of 1-MSPS+ SAR ADCs with <0.00153% error |
| Input offset voltage (max) | ±100 µV - minimizes DC error in precision reference buffering and sensor signal chains |
| Input voltage noise density | 2.5 nV/√Hz at 10 kHz - preserves SNR >91 dB when driving 16-bit ADCs with 10-kHz bandwidth |
| THD+N | –110.8 dBc - meets ENOB ≥14.97 for high-fidelity analog front-end design |
| Mode transition time (LP→HD) | 170 ns - allows on-demand high-speed acquisition bursts without system-level latency penalty |
Pinout & Package
OPA625IDBVT is housed in a 6-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for space-constrained PCB layouts in portable and industrial data acquisition systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Output terminal | Delivers rail-to-rail output swing (within 20 mV of rails at 10-kΩ load); drives ADC input directly with low output impedance (1 Ω @ 1 MHz) |
| V– (Pin 2) | Negative supply voltage | Accepts ground or negative rail; sets lower bound of input common-mode range and output swing |
| +IN (Pin 3) | Noninverting input | High-impedance node (47 MΩ || 1.5 pF); supports DC-coupled precision signal routing |
| –IN (Pin 4) | Inverting input | Differential input node (27 kΩ || 1.2 pF); used in unity-gain buffer or inverting configurations |
| MODE (Pin 5) | Operating mode control | Logic-controlled pin: V– = high-drive mode, V+ = low-power mode; must not be left floating |
| V+ (Pin 6) | Positive supply voltage | Accepts 2.7 V to 5.5 V; powers both analog core and MODE logic interface |
Key Features
| Feature | Design Value |
|---|---|
| Power-scalable dual-mode operation | Switches between 2 mA (HD) and 270 µA (LP) quiescent current while maintaining 16-bit ENOB during transitions |
| Rail-to-rail output | Swings within 20 mV of supply rails at 10-kΩ load, maximizing dynamic range into ADC inputs |
| Ultra-low THD+N | –110.8 dBc enables >14.97 ENOB in 100-kHz signal paths, critical for metrology-grade measurements |
| Wide input common-mode range | Extends to negative rail, supporting single-supply designs with grounded sensor references |
| Guaranteed operation to +125°C | Specified over –40°C to +125°C, suitable for automotive under-hood and industrial motor-control environments |
Applications
| Precision SAR ADC Driver | Precision Voltage Reference Buffer |
|---|---|
Use Scenario: Driving ADS8860 16-bit SAR ADC at 1-MSPS with 10-kHz input signal bandwidth. IC Role / Device Role / Timing Role: High-fidelity, low-settling-time buffer that settles to 16-bit accuracy in 280 ns before ADC conversion window closes. Use Value: Enables full 16-bit ENOB by limiting THD+N to –110.8 dBc and noise to 2.5 nV/√Hz, eliminating gain/offset calibration overhead. | Use Scenario: Buffering 2.5-V precision voltage reference (e.g., REF5025) for multiple ADC channels. IC Role / Device Role / Timing Role: Low-drift, low-noise unity-gain follower with ±100 µV offset and ±3 µV/°C drift. Use Value: Maintains reference integrity across temperature and load variations, preserving absolute accuracy of multi-channel data acquisition. |
| Programmable Logic Controller (PLC) Analog Input Module | Test and Measurement Equipment Front-End |
Use Scenario: Signal conditioning stage in industrial PLC I/O module handling 0–10 V or ±10 V sensor inputs. IC Role / Device Role / Timing Role: Programmable-gain amplifier with mode-switching capability for burst-mode high-resolution sampling during diagnostics. Use Value: Reduces system power by 86% (2 mA → 270 µA) during idle periods while retaining sub-µV offset stability for calibration routines. | Use Scenario: Input stage of portable oscilloscope or spectrum analyzer requiring wideband, low-distortion amplification. IC Role / Device Role / Timing Role: Wideband ADC driver delivering –122 dBc HD2 and –140 dBc HD3 at 100 kHz for spectral purity. Use Value: Supports clean FFT analysis up to 100 kHz without harmonic contamination, meeting Class I bench instrument specifications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op-amp driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA837IDBVR | Single-channel, 105 MHz GBW, fixed 1.4 mA IQ, no mode switching; higher 4.5 nV/√Hz noise | Lacks power-scaling; suited for always-on, moderate-bandwidth precision buffers | Select when deterministic low-noise performance outweighs dynamic power savings |
| THS4561IRGET | Differential output, 1.5-GHz GBW, 3.5 mA IQ, requires external feedback network; no low-power mode | Designed for driving fully differential ADC inputs; incompatible with single-ended ADCs like ADS8860 | Select only for new designs targeting differential-input SAR or pipeline ADCs |
Compared with OPA837IDBVR and THS4561IRGET, the OPA625IDBVT uniquely combines 120 MHz bandwidth, 16-bit settling, and programmable power modes-enabling adaptive energy efficiency in battery-powered or thermally constrained data acquisition systems without sacrificing DC or AC precision.
Availability
OPA625IDBVT is available at Aetrix Electronics and suitable for precision SAR ADC drivers, voltage reference buffers, and test equipment front-ends requiring stable component supply, extended temperature support, and verified production data status.
Supply support for OPA625IDBVT 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 amplifiers and data converter interfaces.
The OPA625IDBVT belongs to TI's OPAx625 family, engineered specifically to address the timing, noise, and power challenges of driving high-throughput, high-resolution SAR ADCs in demanding industrial and instrumentation applications.
FAQ
What is the maximum supply voltage for the OPA625IDBVT?
The OPA625IDBVT supports a supply voltage range of 2.7 V to 5.5 V across the V+ and V– pins. Absolute maximum rating is 6 V (V+ – V–), but operation above 5.5 V is not characterized or guaranteed. At 5.5 V, it maintains full AC performance including 120 MHz GBW and –122 dBc HD2 at 100 kHz, making it compatible with standard 5-V industrial rails and 3.3-V embedded systems.
How does the MODE pin function in the OPA625IDBVT?
The MODE pin on the OPA625IDBVT controls operating mode: connecting it to V– (ground) activates high-drive mode (2 mA IQ, 120 MHz GBW), while connecting it to V+ enables low-power mode (270 µA IQ, 1 MHz GBW). Thresholds are defined as VIL ≤ (V–) + 0.5 V and VIH ≥ (V–) + 1.2 V. The pin must never be left floating, and transition times are specified at 170 ns (LP→HD) and 300 ns (HD→LP).
Does the OPA625IDBVT support rail-to-rail input?
The OPA625IDBVT supports rail-to-rail output but not rail-to-rail input. Its input common-mode voltage range extends to the negative rail (V–) but stops 1.15 V below the positive rail (V+), meaning the maximum allowable input is (V+) – 1.15 V. This allows true single-supply operation with grounded sensors while maintaining precision DC performance and avoiding input stage saturation near V+.
What is the typical settling time for 16-bit accuracy in the OPA625IDBVT?
The OPA625IDBVT achieves 16-bit settling (0.00153% error) in 280 ns for a 4-V step with G = 2, as specified in the datasheet under high-drive mode conditions (TA = 25°C, V+ = 5 V, CLOAD = 20 pF, RLOAD = 2 kΩ). This value is fully characterized and guaranteed over –40°C to +125°C, enabling reliable synchronization with 1-MSPS+ SAR ADCs like the ADS8860 without additional timing margin.
Can the OPA625IDBVT drive capacitive loads, and what is the recommended isolation resistor?
Yes, the OPA625IDBVT can drive capacitive loads up to 20 pF stably in high-drive mode. For larger loads, an external series isolation resistor (Riso) is recommended: 10 Ω for 100-pF loads, 25 Ω for 220-pF loads, and 50 Ω for 470-pF loads, as shown in Figure 14 of the SBOS688A datasheet. This technique preserves phase margin and prevents peaking or oscillation without degrading 16-bit settling performance.
OPA625IDBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 115V/µs
- Gain Bandwidth Product:
- 120 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 µA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 2mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
OPA625IDBVT FAQ
1.How can I place an order for OPA625IDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA625IDBVT 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 OPA625IDBVT reliable?
The price and inventory of OPA625IDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA625IDBVT is usually 5 days.
3.What payment methods are accepted for OPA625IDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA625IDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA625IDBVT?
OPA625IDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA625IDBVT 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 OPA625IDBVT?
For technical support, including OPA625IDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA625IDBVT requirements.
6.How does Aetrix verify that OPA625IDBVT is sourced from the original manufacturer or authorized distributors?
All OPA625IDBVT 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 OPA625IDBVT meets industry standards.
7.What is the process for return or replacement of OPA625IDBVT?
All OPA625IDBVT units undergo pre-shipment inspection (PSI). If there is an issue with OPA625IDBVT, 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 OPA625IDBVT part is unused and in its original packaging.
Return procedure for OPA625IDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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