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Texas Instruments THS4021IDGNR
- Part No.:
- THS4021IDGNR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4021IDGNR.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,239
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Product details
Overview
THS4021IDGNR from Texas Instruments is a single-channel, ultra-low-noise, high-speed voltage-feedback operational amplifier optimized for precision imaging and test instrumentation. It delivers 1.2nV/√Hz input voltage noise, 470V/μs slew rate, 30ns settling time (0.1%), 290MHz closed-loop bandwidth at G=10, and stable operation at gains ≥10V/V - enabling high-fidelity signal conditioning in ultrasound front-ends and source measurement units.
For engineers reviewing the THS4021IDGNR datasheet, THS4021IDGNR pinout, THS4021IDGNR application, or THS4021IDGNR equivalent, key selection criteria include its offset-nulling capability, ±4.5V to ±16V dual-supply flexibility, 200mA output drive, –68dBc THD at 1MHz, and HVSSOP-8 thermal performance (RθJA = 58.4°C/W).
Technical Context
The THS4021IDGNR employs a voltage-feedback architecture with fully differential input stage and Class-AB output stage, supporting stable closed-loop operation at minimum gain of 10V/V without external compensation. Its 2GHz gain-bandwidth product enables wideband signal amplification while maintaining low distortion across 1MHz–10MHz frequency bands.
Offset nulling is implemented via dedicated pins (1 and 8), allowing precise DC calibration in high-gain configurations. The amplifier operates over ±4.5V to ±16V supplies and achieves 200mA peak output current into low-impedance loads, making it suitable for driving 150Ω transmission lines and active filter stages in real-time data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage noise | 1.2nV/√Hz @ >10kHz - enables sub-microvolt signal resolution in low-amplitude sensor interfaces |
| Slew rate | 470V/μs - supports fast transient response for pulse-based imaging and SMU step testing |
| Settling time | 30ns to 0.1% - ensures accurate multi-sample digitization in high-speed ADC driver applications |
| THD | –68dBc @ 1MHz, RL=150Ω - meets spectral purity requirements for RF and communication test equipment |
| Supply range | ±4.5V to ±16V - accommodates both portable (±5V) and high-dynamic-range (±15V) system architectures |
| Output drive | 200mA typical - directly drives 150Ω coaxial cables or parallel DAC output buffers without external boost |
| Gain stability | Stable at G ≥ 10V/V - eliminates need for gain-setting compensation networks in fixed-gain stages |
Pinout & Package
The THS4021IDGNR is housed in an 8-pin HVSSOP (DGN) package with exposed thermal pad, offering 58.4°C/W junction-to-ambient thermal resistance for sustained high-output operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 NULL | Offset null adjustment inputs | Connect external potentiometer (10kΩ) between pins 1–8 with wiper to VCC– to trim input offset voltage to <0.5mV |
| 2 IN– | Inverting input | Differential input node; requires matched trace length and impedance control for optimal CMRR above 1MHz |
| 3 IN+ | Noninverting input | High-impedance (1MΩ) input node; sensitive to PCB leakage and guarding in µV-level applications |
| 4 VCC– | Negative supply rail | Must be decoupled with 0.1µF ceramic + 10µF tantalum within 5mm of pin; ground return path shared with analog ground plane |
| 5 NC | No connection | Internally unconnected; must remain floating - no trace or copper pour allowed under pad |
| 6 OUT | Amplifier output | Capable of sourcing/sinking 200mA; requires short, low-inductance routing to load to preserve 470V/μs slew rate |
| 7 VCC+ | Positive supply rail | Decoupling identical to VCC–; separate power planes recommended for ±15V operation to minimize PSRR degradation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low voltage noise | 1.2nV/√Hz enables detection of microvolt-level signals in ultrasound transducer preamplifiers |
| Offset nulling pins | Pins 1 and 8 allow <0.3mV offset trimming - critical for DC-coupled SMU feedback loops |
| High output current | 200mA drive capability eliminates need for external buffer when driving 150Ω video or test loads |
| Wide supply range | ±4.5V to ±16V operation supports both battery-powered portables and benchtop 16-bit precision instruments |
| Low distortion at 1MHz | –68dBc THD allows clean signal generation up to Nyquist frequency in 2Msps data acquisition systems |
Applications
| Ultrasound Scanner Front-End | Source Measurement Unit (SMU) |
|---|---|
Use Scenario: Amplifying weak echo signals from piezoelectric transducers in real-time B-mode imaging. IC Role / Device Role / Timing Role: Low-noise preamplifier with G=10 fixed gain and 290MHz bandwidth for RF envelope detection. Use Value: 1.2nV/√Hz noise floor preserves SNR of sub-100µV echoes; 30ns settling enables 33MHz sampling of beamformed data. | Use Scenario: Precision voltage/current sourcing and measurement in semiconductor parametric testers. IC Role / Device Role / Timing Role: High-stability feedback amplifier in 4-quadrant force-sense circuitry with offset nulling. Use Value: Offset trimming via pins 1/8 reduces DC error to <0.5mV; ±16V supply supports ±10V compliance ranges. |
| Power Quality Analyzer | High-Speed Data Acquisition Channel |
Use Scenario: Conditioning 50/60Hz–2kHz harmonic waveforms from current transformers and potential dividers. IC Role / Device Role / Timing Role: Anti-aliasing filter driver and gain stage preceding 16-bit SAR ADCs. Use Value: –68dBc THD at 1kHz ensures <0.05% harmonic measurement accuracy; 200mA drive handles 150Ω ADC input impedance. | Use Scenario: Signal conditioning for 10+ MSps oscilloscope channels requiring flat frequency response. IC Role / Device Role / Timing Role: Unity-gain stable buffer (G≥10) with 470V/μs slew rate for fast edge preservation. Use Value: 30ns settling guarantees <0.1% fidelity on 10Vpp 100ns pulses; HVSSOP-8 thermal design sustains continuous 200mA output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-noise op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6629MA/NOPB | Lower 0.94nV/√Hz noise but only 140MHz GBW; no offset null pins; 130mA output | Better noise for DC-coupled sensor amps; insufficient bandwidth for >50MHz ultrasound IF stages | Select when ultra-low noise dominates over bandwidth and offset trim is handled digitally |
| OPA656U | 1.6nV/√Hz noise, 500MHz GBW, ±12V max supply, no null pins, 120mA output | Higher bandwidth for RF applications; lacks nulling for precision DC gain stages | Prefer for wideband photodiode transimpedance amps where offset drift is less critical than speed |
Compared with LMH6629MA/NOPB and OPA656U, the THS4021IDGNR uniquely combines offset nulling, 290MHz bandwidth at G=10, and 200mA drive in an HVSSOP package - making it the only choice for high-precision, high-output, DC-coupled instrumentation requiring manual offset calibration.
Availability
THS4021IDGNR is available at Aetrix Electronics and suitable for ultrasound scanner front-ends, source measurement units, and power quality analyzers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for THS4021IDGNR 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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The THS402x family was designed specifically for high-fidelity, wideband signal conditioning in medical imaging, automated test equipment, and precision instrumentation - prioritizing low noise, fast settling, and gain stability over unity.
FAQ
What is the maximum supply voltage rating for THS4021IDGNR?
The THS4021IDGNR has an absolute maximum supply voltage rating of ±16.5V (33V total across VCC+ and VCC–). Operation beyond ±16V is not recommended; the recommended operating range is ±4.5V to ±16V. Exceeding ±16.5V risks permanent damage per TI's Absolute Maximum Ratings table in the SLOS265F datasheet.
Does THS4021IDGNR require external compensation for stability at G=10?
No, the THS4021IDGNR is internally compensated and specified as stable at gains ≥10V/V without external components. Its design eliminates the need for feedback capacitors or gain-setting networks in standard non-inverting or inverting configurations at G=10 or higher - verified by 290MHz closed-loop bandwidth and clean step response in Figure 5-21 through 5-23.
How is offset nulling implemented on THS4021IDGNR?
Offset nulling on THS4021IDGNR uses pins 1 and 8 (labeled NULL). A 10kΩ potentiometer is connected between these pins, with its wiper tied to VCC–. Adjusting the potentiometer balances internal input stage mismatches, reducing input offset voltage to typically <0.3mV at 25°C - a capability not found in most competing high-speed op-amps like OPA656U or LMH6629.
What thermal considerations apply to THS4021IDGNR in HVSSOP-8 package?
The THS4021IDGNR in HVSSOP-8 (DGN) has RθJA = 58.4°C/W. To maintain TJ < 125°C at full 200mA output, ambient temperature must stay below 75°C with proper PCB copper area (≥1 in² thermal pad) and airflow. Thermal derating begins above 85°C ambient - confirmed by Figure 5-29 showing reduced output swing at elevated temperatures.
Can THS4021IDGNR drive a 50Ω load effectively?
Yes - THS4021IDGNR delivers 200mA typical output current and sustains ±12.5V swing into 250Ω (Figure 5-7), implying >100mA into 50Ω. However, for sustained 50Ω driving, thermal limits require limiting duty cycle or adding heatsinking; Figure 5-30 shows output voltage collapse above 100mA sink/source at ±15V, confirming 50Ω is viable only for pulsed or short-duration signals.
THS4021IDGNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 470V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 350 MHz
- Current - Input Bias:
- 3 µA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 7.8mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
THS4021IDGNR FAQ
1.How can I place an order for THS4021IDGNR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4021IDGNR 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 THS4021IDGNR reliable?
The price and inventory of THS4021IDGNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4021IDGNR is usually 5 days.
3.What payment methods are accepted for THS4021IDGNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4021IDGNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4021IDGNR?
THS4021IDGNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4021IDGNR 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 THS4021IDGNR?
For technical support, including THS4021IDGNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4021IDGNR requirements.
6.How does Aetrix verify that THS4021IDGNR is sourced from the original manufacturer or authorized distributors?
All THS4021IDGNR 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 THS4021IDGNR meets industry standards.
7.What is the process for return or replacement of THS4021IDGNR?
All THS4021IDGNR units undergo pre-shipment inspection (PSI). If there is an issue with THS4021IDGNR, 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 THS4021IDGNR part is unused and in its original packaging.
Return procedure for THS4021IDGNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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