My Inquiry
My Account
Texas Instruments THS4021CDRG4
- Part No.:
- THS4021CDRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS4021CDRG4.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,985
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
THS4021CDRG4 from Texas Instruments is a single-channel, ultra-low-noise (1.2nV/√Hz), high-speed voltage-feedback operational amplifier optimized for gain ≥10V/V stable operation. It delivers 290MHz small-signal bandwidth, 470V/μs slew rate, and 30ns 0.1% settling time at G=10, enabling precision signal conditioning in ultrasound front-ends and source measurement units.
For engineers reviewing the THS4021CDRG4 datasheet, THS4021CDRG4 pinout, THS4021CDRG4 application, or THS4021CDRG4 equivalent, key selection criteria include its offset-nulling capability, ±4.5V to ±16V dual-supply flexibility, 200mA output drive, –68dBc THD at 1MHz, and SOIC-8 package compatibility with high-density analog PCB layouts.
Technical Context
The THS4021CDRG4 employs a voltage-feedback architecture with internal compensation tailored for minimum-phase stability at closed-loop gains ≥10V/V (or ≤–9V/V). Its input stage uses a low-noise bipolar topology, delivering 1.2nV/√Hz voltage noise and 2.3pA/√Hz current noise above 10kHz, while maintaining 92dB open-loop gain and 95dB CMRR at 25°C.
It operates across ±4.5V to ±16V supplies, drawing only 7.5mA per amplifier. The inclusion of dedicated NULL pins enables precise DC offset trimming-critical for high-gain, low-distortion applications like medical imaging signal chains where baseline drift directly impacts dynamic range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage noise | 1.2nV/√Hz - Enables detection of microvolt-level signals in low-amplitude sensor interfaces without dominating system noise floor. |
| Small-signal BW | 290MHz at G=10 - Supports wideband pulse amplification in ultrasound beamforming with minimal group delay distortion. |
| Slew rate | 470V/μs - Ensures faithful reproduction of fast transient waveforms (e.g., pulsed excitation signals) without slew-induced distortion. |
| Settling time | 30ns to 0.1% - Meets timing-critical requirements in automated test equipment (ATE) SMU feedback loops with sub-100ns update cycles. |
| THD | –68dBc at 1MHz, RL=150Ω - Maintains spectral purity in power quality analyzers measuring harmonic content up to 50th order. |
| Output drive | 200mA - Drives low-impedance loads (e.g., 150Ω coaxial cables or ADC input buffers) without external boost stages. |
| Supply range | ±4.5V to ±16V - Allows direct integration into legacy ±15V industrial systems or compact ±5V portable instrumentation. |
Pinout & Package
THS4021CDRG4 is packaged in an 8-pin SOIC (D package), with thermal resistance RθJA = 124.5°C/W. This surface-mount package supports reflow soldering and is compatible with standard PCB assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | NULL | Offset voltage adjustment inputs-connect external potentiometer (10kΩ) between Pins 1/8 and VCC– to null DC error in precision gain stages. |
| 2 | IN– | Inverting input-accepts feedback network for stable high-gain configurations (≥10V/V) without external compensation. |
| 3 | IN+ | Noninverting input-high-impedance (1MΩ) node for sensor or reference signal injection with minimal loading. |
| 4 | VCC– | Negative supply rail-must be decoupled with 0.1μF ceramic capacitor near pin to suppress high-frequency supply noise. |
| 5 | NC | No connection-leave unconnected; no internal circuitry attached; avoid routing traces or vias to this pad. |
| 6 | OUT | Amplifier output-capable of sourcing/sinking 200mA; requires careful layout to minimize parasitic inductance when driving capacitive loads. |
| 7 | VCC+ | Positive supply rail-decouple independently with 0.1μF ceramic + 10μF tantalum for broadband supply rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low voltage noise | 1.2nV/√Hz enables sub-microvolt resolution in high-gain sensor signal chains without cascaded noise amplification. |
| Gain-stable architecture | Guaranteed stability at gains ≥10V/V eliminates need for external compensation networks in fixed-gain instrumentation designs. |
| Offset nulling capability | Dedicated NULL pins allow <100μV residual offset after trimming-critical for DC-coupled medical imaging front-ends. |
| High output current | 200mA drive capability supports direct interface to 150Ω transmission lines or low-impedance ADC drivers without buffer stages. |
| Low THD at high frequency | –68dBc at 1MHz ensures accurate harmonic analysis in power quality meters measuring distorted grid waveforms. |
Applications
| Ultrasound Scanner Front-End | Source Measurement Unit (SMU) |
|---|---|
Use Scenario: Amplifying weak RF echo signals (2–15MHz) from piezoelectric transducers after time-gain compensation (TGC). IC Role / Device Role / Timing Role: Low-noise, high-bandwidth post-TGC amplifier operating at G=10–20 with precise DC offset control. Use Value: 1.2nV/√Hz input noise preserves SNR in deep-tissue imaging; 290MHz bandwidth supports full diagnostic bandwidth without roll-off. | Use Scenario: Precision current/voltage sourcing and sensing in semiconductor parametric test systems requiring <0.1% linearity. IC Role / Device Role / Timing Role: High-speed, low-distortion feedback amplifier in four-quadrant force-voltage/current source loops. Use Value: 30ns settling time enables rapid step-response testing; –68dBc THD ensures accurate harmonic-free stimulus generation. |
| Power Quality Analyzer | High-Speed Data Acquisition Channel |
Use Scenario: Conditioning AC mains voltage/current waveforms for FFT-based harmonic analysis up to 5kHz fundamental. IC Role / Device Role / Timing Role: Anti-aliasing and gain-stage amplifier preceding 16-bit SAR ADCs sampling at ≥100kSPS. Use Value: 290MHz bandwidth provides >10× oversampling margin; ±16V supply headroom accommodates 1000V RMS input ranges via resistive dividers. | Use Scenario: Driving multiplexed ADC inputs in modular digitizers requiring fast channel settling and low crosstalk. IC Role / Device Role / Timing Role: Single-ended-to-differential driver or buffered gain stage with matched settling behavior across channels. Use Value: 470V/μs slew rate prevents slewing artifacts during multi-channel burst acquisition; SOIC-8 footprint simplifies layout symmetry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-noise amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA656U | Lower 0.94nV/√Hz noise but narrower 500MHz GBW; no offset-null pins; higher 12.5mA supply current. | Better for ultra-low-noise photodiode preamps; unsuitable where DC offset trimming is required. | Select OPA656U only if noise dominates over DC stability needs and layout allows higher power dissipation. |
| LMH6629MA | Higher 1.9nV/√Hz noise but wider 1.5GHz GBW; no NULL pins; 100mA output drive; requires external compensation for G≥5. | Better for GHz-range RF IF amplification; not recommended for precision DC-coupled SMU feedback paths. | Choose LMH6629MA when bandwidth >1GHz is mandatory and offset drift can be managed digitally. |
Compared with OPA656U and LMH6629MA, THS4021CDRG4 uniquely balances ultra-low noise, guaranteed gain stability at G≥10, and hardware-adjustable offset-making it optimal for DC-accurate, wideband analog front-ends where calibration simplicity and thermal drift control are critical.
Availability
THS4021CDRG4 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 manufacturability, and TI-qualified automotive-grade traceability.
Supply support for THS4021CDRG4 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-performance op-amps and precision signal chain solutions.
The THS402x family was designed specifically for demanding wideband, low-noise applications such as medical imaging, automated test equipment, and high-fidelity data acquisition-where voltage noise, settling accuracy, and gain stability are non-negotiable.
FAQ
What is the maximum supply voltage rating for THS4021CDRG4?
The THS4021CDRG4 has an absolute maximum supply voltage rating of ±16.5V (33V total across VCC+ and VCC–). Operation beyond this risks permanent damage. For reliable long-term use, TI specifies ±16V as the maximum recommended dual-supply voltage, with ±4.5V as the minimum. Always observe derating guidelines in Section 5.1 of the datasheet when operating near limits.
Does THS4021CDRG4 require external compensation for stability at G=10V/V?
No, THS4021CDRG4 is internally compensated and explicitly specified as stable at closed-loop gains ≥10V/V (and ≤–9V/V) without external components. This eliminates the need for compensation capacitors or resistor networks in fixed-gain configurations, reducing bill-of-materials count and layout complexity in ultrasound and SMU designs.
How is offset voltage trimmed on THS4021CDRG4?
THS4021CDRG4 provides dedicated NULL pins (Pins 1 and 8) for external offset nulling. Connect a 10kΩ potentiometer between these pins, with its wiper tied to VCC–. Adjusting the potentiometer balances the input stage, reducing input offset voltage to <100μV-essential for DC-coupled applications like precision source-measure units where baseline accuracy affects measurement fidelity.
What is the typical output current capability of THS4021CDRG4 under load?
THS4021CDRG4 delivers 200mA typical output current into low-impedance loads (e.g., RL = 10Ω) at ±15V supplies. At ±5V, it provides 160mA typical. This high drive strength allows direct interfacing with 150Ω coaxial cables, ADC input buffers, or active filters without external current-boosting stages-reducing signal path complexity and distortion sources.
Can THS4021CDRG4 operate from a single supply?
Yes, THS4021CDRG4 supports single-supply operation from 9V to 33V (e.g., +24V with ground referenced). Input common-mode range extends to within 1.2V of rails, and output swing reaches ±3.5V into 150Ω at +5V supply. However, DC-coupled single-supply use requires level-shifting the input and biasing the output-designers should verify rail-to-rail performance against their specific signal range and load conditions.
THS4021CDRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 100 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
THS4021CDRG4 FAQ
1.How can I place an order for THS4021CDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4021CDRG4 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 THS4021CDRG4 reliable?
The price and inventory of THS4021CDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4021CDRG4 is usually 5 days.
3.What payment methods are accepted for THS4021CDRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4021CDRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4021CDRG4?
THS4021CDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4021CDRG4 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 THS4021CDRG4?
For technical support, including THS4021CDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4021CDRG4 requirements.
6.How does Aetrix verify that THS4021CDRG4 is sourced from the original manufacturer or authorized distributors?
All THS4021CDRG4 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 THS4021CDRG4 meets industry standards.
7.What is the process for return or replacement of THS4021CDRG4?
All THS4021CDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with THS4021CDRG4, 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 THS4021CDRG4 part is unused and in its original packaging.
Return procedure for THS4021CDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
THS4021CDRG4 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
