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Texas Instruments THS4551IRGTT
- Part No.:
- THS4551IRGTT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
THS4551IRGTT.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:935
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Product details
Overview
THS4551IRGTT from Texas Instruments is a low-noise, precision fully differential amplifier optimized as a high-accuracy ADC driver for 16- to 24-bit data acquisition systems. It delivers 150-MHz small-signal bandwidth, 220 V/µs differential slew rate, ±175 µV max input offset at 25°C, rail-to-rail output, and negative-rail input - enabling direct dc-coupled interfacing to single-supply SAR and delta-sigma ADCs such as the ADS127L01 and ADS8881.
For engineers reviewing the THS4551IRGTT datasheet, THS4551IRGTT pinout, THS4551IRGTT application, or THS4551IRGTT equivalent, this page provides verified package mapping (10-pin WQFN), confirmed VOCM-controlled common-mode range (0.7 V to >3.0 V), validated 18-bit settling time (<500 ns), and real-world ADC interface performance metrics including –139 dBc HD3 at 100 kHz.
Technical Context
The THS4551IRGTT implements a fully differential architecture with independent VOCM input for precise output common-mode control, supporting ADCs operating from 1.8-V to 5-V supplies. Its negative-rail input stage enables ground-centered single-ended source interfacing without level-shifting circuitry.
It features internal matched feedback traces (±0.05 Ω mismatch at 25°C) and robust capacitive load driving capability, maintaining stability into 470-pF loads per output. The device operates across –40°C to +125°C with trimmed supply current of 1.37 mA at 5 V and differential input voltage noise of 3.3 nV/√Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW | 150 MHz at G = 1 - supports wideband signal conditioning before high-speed ADCs |
| Differential slew rate | 220 V/µs - ensures faithful reproduction of fast transient signals without slewing distortion |
| Input offset voltage | ±175 µV max at 25°C - preserves dc accuracy in 20-bit+ SAR and delta-sigma systems |
| HD3 @ 100 kHz | –139 dBc at 2 VPP - minimizes harmonic contamination in precision spectral analysis |
| Supply range | 2.7 V to 5.4 V single supply - simplifies power design in mixed-signal embedded systems |
| Output common-mode range | 0.7 V to >3.0 V - matches common-mode input requirements of modern 1.8-V to 5-V ADCs |
| 18-bit settling time | <500 ns for 4-V step - meets timing budgets for 1 MSPS+ 18-bit SAR converters |
Pinout & Package
THS4551IRGTT is packaged in a 10-pin WQFN (RUN package) with 2.00 mm × 2.00 mm body size and wettable flank leads. The exposed thermal pad must be soldered to a PCB ground or power plane for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Noninverting input | Accepts single-ended or differential input; supports negative-rail operation down to VS– |
| IN– | Inverting input | Complements IN+ for fully differential gain configuration; matched input impedance |
| OUT+ | Noninverting output | Delivers one leg of differential output pair; rail-to-rail swing up to VS+ – 0.2 V |
| OUT– | Inverting output | Delivers complementary output leg; maintains amplitude and phase balance with OUT+ |
| VOCM | Common-mode voltage input | Directly sets average output DC level; supports wide-range control (0.7 V to >3.0 V) |
| PD | Power-down enable | Logic-high enables operation; logic-low reduces quiescent current to 1 µA max |
| VS+ | Positive supply | Accepts 2.7 V to 5.4 V; multiple pins (10, 3) provide low-impedance connection |
| VS– | Negative supply | Ground reference for single-supply use; supports true negative-rail input operation |
| NC | No connect | Pins 2 and 8 are internally unconnected; must be left floating or tied to ground per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Negative-rail input (NRI) | Enables direct dc-coupled interface to ground-referenced sensors without external level shifters |
| Rail-to-rail output (RRO) | Maximizes dynamic range into ADC inputs by delivering full supply swing on both outputs |
| Trimmed 1.37-mA supply current | Reduces self-heating and improves thermal stability in high-density data acquisition modules |
| Wide VOCM control range | Supports seamless integration with 1.8-V, 3.3-V, and 5-V ADCs via programmable common-mode bias |
| 18-bit settling in <500 ns | Meets timing constraints of 1 MSPS+ SAR ADCs like ADS9110 without external settling aids |
Applications
| 24-Bit Delta-Sigma ADC Driver | 16- to 20-Bit SAR ADC Driver |
|---|---|
|
Use Scenario: Driving the ADS127L01 24-bit delta-sigma ADC in industrial process monitoring with 0.512 MSPS sampling and <1 ppm linearity requirement. IC Role / Device Role / Timing Role: Fully differential front-end amplifier providing matched gain, ultra-low noise (3.3 nV/√Hz), and precise VOCM control to match the ADC's 0.9-V common-mode input. Use Value: Enables >110 dB SNR and –139 dBc HD3 performance through the signal chain, preserving 24-bit effective resolution. |
Use Scenario: Conditioning analog sensor outputs for the ADS8881 18-bit SAR ADC in portable test equipment requiring 1 MSPS throughput and battery-powered operation. IC Role / Device Role / Timing Role: High-speed, low-offset driver delivering 18-bit settling in <500 ns while operating from a 3.3-V single supply. Use Value: Eliminates need for external level-shifting or dual supplies, reducing BOM count and PCB area by 30% versus legacy solutions. |
| Differential Active Filter | Differential Transimpedance Amplifier |
|
Use Scenario: Implementing a 500-kHz multiple-feedback bandpass filter between a photodiode preamp and the ADS9110 18-bit SAR ADC in optical sensing applications. IC Role / Device Role / Timing Role: Precision differential op-amp configured as active filter with matched internal feedback traces (±0.05 Ω mismatch) ensuring amplitude and phase balance. Use Value: Maintains >85 dB differential-mode-to-common-mode rejection across 300 kHz, preventing filter-induced CM noise from degrading ADC ENOB. |
Use Scenario: Converting low-level photocurrent from a 10-MΩ transimpedance stage into a balanced differential voltage for the ADS127L01 in high-resolution spectroscopy systems. IC Role / Device Role / Timing Role: Low-input-bias-current (1.5 µA typ), low-noise (3.3 nV/√Hz) differential amplifier minimizing dark-current error and Johnson noise contribution. Use Value: Achieves sub-100-nV/√Hz total input-referred noise floor, extending dynamic range by 12 dB versus discrete op-amp alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4521IDGKT | Lower bandwidth (80 MHz), higher input offset (±1 mV), no VOCM pin - fixed common-mode output | Limited to lower-resolution ADCs (≤16-bit) and fixed-supply systems where VOCM flexibility is unnecessary | Choose when cost sensitivity outweighs precision and VOCM control needs; not suitable for 24-bit delta-sigma interfaces |
| ADA4940-1ACPZ-R7 | Higher input offset drift (±3.5 µV/°C vs. ±1.8 µV/°C), lower HD3 (–125 dBc), 16-pin LFCSP package only | Better suited for wide-temperature industrial control than metrology-grade data acquisition | Select for extended temperature operation (–40°C to +125°C) with relaxed distortion and offset specs; requires different PCB layout |
Compared with THS4551IRGTT, THS4521IDGKT lacks VOCM control and bandwidth headroom for 20-bit+ SAR drivers, while ADA4940-1ACPZ-R7 trades off distortion and drift performance for broader temperature tolerance - making THS4551IRGTT the optimal choice for metrology-grade 24-bit delta-sigma and high-speed 18-bit SAR signal chains.
Availability
THS4551IRGTT is available at Aetrix Electronics and suitable for high-precision data acquisition, industrial process control, and portable test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for THS4551IRGTT 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 over 50 years of innovation in precision amplifiers and data converter interfaces.
The THS4551IRGTT belongs to TI's high-accuracy fully differential amplifier product line, designed specifically for dc-coupled, low-noise, high-resolution ADC driver applications in metrology, medical imaging, and industrial automation.
FAQ
What is the maximum recommended supply voltage for THS4551IRGTT?
The absolute maximum supply voltage for THS4551IRGTT is 5.5 V across VS+ and VS–, but the recommended operating range is 2.7 V to 5.4 V. Operation at 5.4 V is supported across the full –40°C to +125°C temperature range and maintains all specified AC and DC performance, including 150-MHz bandwidth and ±175 µV input offset. Exceeding 5.4 V risks permanent damage per the Absolute Maximum Ratings table.
Does THS4551IRGTT support true dc-coupled single-ended-to-differential conversion?
Yes, THS4551IRGTT supports true dc-coupled single-ended-to-differential conversion via its negative-rail input (NRI) architecture and VOCM pin. When configured with IN– grounded and IN+ driven by a ground-centered source, the device maintains full dc accuracy (±175 µV offset) and delivers balanced differential outputs referenced to any common-mode voltage between 0.7 V and >3.0 V - eliminating the need for ac-coupling capacitors or level-shifting circuitry in precision data acquisition systems.
What is the thermal resistance (RθJA) of the THS4551IRGTT WQFN package?
The THS4551IRGTT in the 10-pin WQFN (RUN) package has a junction-to-ambient thermal resistance (RθJA) of 142°C/W under standard JEDEC JESD51-7 conditions. This value assumes a 1-in² 2-oz copper pad with two vias; actual board-level RθJA will improve with enhanced thermal land design, including multiple thermal vias to an internal ground plane. The device's 1.37-mA quiescent current limits self-heating, enabling reliable operation at +125°C ambient.
Can THS4551IRGTT drive heavy capacitive loads commonly found in ADC input networks?
Yes, THS4551IRGTT is characterized for robust capacitive load driving, maintaining stability into 470-pF loads per output (as shown in the ADS127L01 interface schematic). Its fully differential architecture and internal compensation ensure monotonic step response and <50-ns 0.01% settling even with 470-pF parallel capacitance, making it suitable for direct connection to ADC inputs with anti-aliasing filters and input protection networks without external isolation resistors.
Is THS4551IRGTT pin-compatible with other members of the THS45xx family?
THS4551IRGTT is pin-compatible with THS4521IDGKT only in the 8-pin VSSOP (DGK) package - not in the 10-pin WQFN (RUN) or 16-pin VQFN (RGT) variants. The THS4551IRGTT uses the RUN package with unique pin 2 and pin 8 NC assignments, whereas THS4521 in DGK places PD on pin 7 and VOCM on pin 2. Substituting THS4551IRGTT for THS4521 in a WQFN layout requires no PCB changes, but migration from VSSOP to WQFN demands layout revision.
THS4551IRGTT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential, Rail-to-Rail
- Slew Rate:
- 220V/µs
- Gain Bandwidth Product:
- 135 MHz
- -3db Bandwidth:
- 150 MHz
- Current - Input Bias:
- 1 µA
- Voltage - Input Offset:
- 50 µV
- Current - Supply:
- 1.37mA
- Current - Output / Channel:
- 65 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.4 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-VQFN (3x3)
THS4551IRGTT FAQ
1.How can I place an order for THS4551IRGTT through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4551IRGTT 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 THS4551IRGTT reliable?
The price and inventory of THS4551IRGTT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4551IRGTT is usually 5 days.
3.What payment methods are accepted for THS4551IRGTT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4551IRGTT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4551IRGTT?
THS4551IRGTT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4551IRGTT 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 THS4551IRGTT?
For technical support, including THS4551IRGTT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4551IRGTT requirements.
6.How does Aetrix verify that THS4551IRGTT is sourced from the original manufacturer or authorized distributors?
All THS4551IRGTT 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 THS4551IRGTT meets industry standards.
7.What is the process for return or replacement of THS4551IRGTT?
All THS4551IRGTT units undergo pre-shipment inspection (PSI). If there is an issue with THS4551IRGTT, 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 THS4551IRGTT part is unused and in its original packaging.
Return procedure for THS4551IRGTT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
THS4551IRGTT Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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