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Texas Instruments THS4120IDGNR
- Part No.:
- THS4120IDGNR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4120IDGNR.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,779
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Product details
Overview
THS4120IDGNR from Texas Instruments is a single-channel, fully differential-input/differential-output high-speed amplifier optimized for ADC driving and antialiasing in 3.3-V single-supply systems. It delivers 100 MHz bandwidth, 55 V/µs slew rate, –75 dB THD at 1 MHz (2 VPP), 5.4 nV/√Hz input noise, and features a dedicated power-down pin (PD) enabling quiescent current reduction from 13.5 mA to 120 µA.
For engineers reviewing the THS4120IDGNR datasheet, THS4120IDGNR pinout, THS4120IDGNR application, or THS4120IDGNR equivalent, this page provides verified specifications, MSOP PowerPAD™ package details, differential signal path architecture, power-down timing behavior, and validated alternatives for precision data acquisition and high-fidelity analog front-ends.
Technical Context
The THS4120IDGNR implements a true fully differential signal path with matched internal gain stages, enabling balanced output common-mode rejection and second-harmonic cancellation. Its VOCM pin sets output DC level independently of input common-mode voltage, supporting midrail biasing in single-supply ADC interfaces.
It uses TI's submicron CMOS process and integrates internal compensation for 100 MHz bandwidth while requiring external 20-Ω series resistors for stable capacitive load driving (>10 pF). The PD pin operates with 1.4 V enable threshold and requires a 10-kΩ pullup to VDD for reliable power-on functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (–3 dB) | 100 MHz - supports wideband signal conditioning up to Nyquist frequency of 50-MSPS ADCs |
| Slew Rate | 55 V/µs - enables clean 2-VPP differential step response with 60 ns settling to 0.1% |
| Total Harmonic Distortion | –75 dB at 1 MHz, 2 VPP - meets SNR > 12-bit requirement for precision data converters |
| Input Voltage Noise | 5.4 nV/√Hz at 10 kHz - preserves dynamic range in low-level sensor signal amplification |
| Supply Voltage Range | 3.0–3.5 V - compatible with standard 3.3-V LDO rails and avoids overvoltage stress on ADC reference domains |
| Power-Down Current | 120 µA - reduces system standby power by >99% without disabling downstream circuitry |
| Common-Mode Input Range | 0.35 V to VDD – 0.1 V - accommodates rail-to-rail input signals when VOCM = VDD/2 |
Pinout & Package
THS4120IDGNR is housed in an 8-pin MSOP PowerPAD™ (DGN) package with exposed thermal pad on underside. The PowerPAD must be soldered to a PCB copper pour for thermal management; it is electrically isolated from all pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VIN− | Inverting input | Differential input node; requires matched trace length and impedance to VIN+ for CMRR optimization |
| 2: VOCM | Output common-mode control | Sets DC level of both outputs; bypass with 0.1-µF capacitor to suppress noise coupling |
| 3: VDD | Positive supply | 3.3-V single supply input; requires local 0.1-µF ceramic + 6.8-µF tantalum decoupling |
| 4: VOUT+ | Positive differential output | Delivers inverted amplified signal; series 20-Ω resistor required for >10-pF capacitive loads |
| 5: VIN+ | Non-inverting input | Differential input node; symmetrical layout with VIN− critical for harmonic distortion suppression |
| 6: PD | Power-down enable | Active-high control; requires 10-kΩ pullup to VDD; drives <1.2 V to enter low-power state |
| 7: GND | Analog ground | Reference for all internal biasing; must connect directly to low-inductance ground plane |
| 8: VOUT− | Negative differential output | Delivers non-inverted amplified signal; complements VOUT+ to form true differential pair |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Enables 2× dynamic range vs. single-ended amps-e.g., 2-VPP output drives 1-VPP differential ADC inputs |
| Integrated power-down pin (PD) | Reduces IDD from 13.5 mA to 120 µA in <5 µs, ideal for burst-mode data acquisition systems |
| VOCM-controlled output level shifting | Allows independent setting of output DC bias without affecting gain or AC performance |
| High CMRR (96 dB typical) | Maintains signal integrity in noisy industrial environments by rejecting coupled interference on both outputs |
| MSOP PowerPAD™ thermal package | θJA = 58.4°C/W enables 1.71 W power dissipation at 25°C ambient-critical for sustained 100-MHz operation |
Applications
| ADC Driver for Precision Data Acquisition | Differential Transmitter in Communications Front-End |
|---|---|
Use Scenario: Driving 14-bit, 100-MSPS pipeline ADC with 2-VPP full-scale range in medical imaging equipment. IC Role / Device Role / Timing Role: Differential ADC driver providing gain = 1, VOCM = 1.65 V, and antialias filtering interface. Use Value: –75 dB THD ensures >85-dB SFDR; 100 MHz bandwidth supports >40-MHz input signal bandwidth. |
Use Scenario: Transmitting baseband I/Q signals in software-defined radio (SDR) transceivers. IC Role / Device Role / Timing Role: Differential transmitter converting single-ended DAC outputs to balanced RF mixer inputs. Use Value: Balanced outputs reject even-order distortion; 55 V/µs slew rate preserves modulation envelope fidelity. |
| Single-Supply Sensor Signal Conditioning | Low-Power Portable Instrumentation |
Use Scenario: Amplifying low-noise piezoelectric sensor outputs in handheld vibration analyzers. IC Role / Device Role / Timing Role: High-impedance differential preamplifier with VOCM-referenced output for 3.3-V SAR ADC. Use Value: 5.4 nV/√Hz input noise preserves microvolt-level signal resolution; 820-MΩ input resistance minimizes loading. |
Use Scenario: Battery-powered portable oscilloscope front-end requiring intermittent high-speed sampling. IC Role / Device Role / Timing Role: Power-gated signal conditioner activated only during acquisition windows via PD pin. Use Value: 120 µA power-down current extends battery life; <5 µs turn-on time enables rapid measurement bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4121IDGNR | No power-down pin; 13.5 mA fixed quiescent current; identical bandwidth, noise, and distortion specs | Suitable where continuous operation is required and power gating is unnecessary | Select THS4121IDGNR if system-level power sequencing eliminates need for per-amplifier shutdown control |
| THS4131IDGNR | 150 MHz bandwidth, 51 V/µs slew rate, 1.3 nV/√Hz noise; wider supply range (5–30 V); no PD pin | Better suited for higher-frequency, lower-noise applications but incompatible with 3.3-V-only systems | Choose THS4131IDGNR only when upgrading to >100-MHz signal chains and redesigning supply architecture |
Compared with THS4121IDGNR and THS4131IDGNR, the THS4120IDGNR uniquely balances 100-MHz performance, ultra-low 3.3-V power-down capability, and cost-effective MSOP packaging-making it optimal for portable, battery-sensitive, and ADC-coupled designs where dynamic power control is mandatory.
Availability
THS4120IDGNR is available at Aetrix Electronics and suitable for precision data acquisition, communications front-ends, portable instrumentation, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for THS4120IDGNR 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, embedded processing, and digital signal technologies, with decades of expertise in high-speed amplifier design and manufacturing.
The THS4120IDGNR belongs to TI's THS412x family of fully differential I/O amplifiers, engineered specifically for high-fidelity ADC driving, antialiasing, and differential transmission in single-supply 3.3-V systems.
FAQ
What is the function of the PD pin on the THS4120IDGNR?
The PD (Power-Down) pin on the THS4120IDGNR is an active-high enable input that reduces quiescent current from 13.5 mA to 120 µA when driven below 1.2 V. It requires a 10-kΩ pullup resistor to VDD for reliable power-on operation and achieves turn-on in 4.8 µs. This feature is absent in the THS4121IDGNR and enables precise system-level power gating in the THS4120IDGNR.
Can the THS4120IDGNR operate from a single 3.3-V supply?
Yes, the THS4120IDGNR is explicitly specified for single-supply operation at 3.3 V (range: 3.0–3.5 V). Its VOCM pin defaults to VDD/2 (1.65 V), enabling direct interfacing with 3.3-V ADCs that accept midrail-biased differential inputs. The device maintains full AC performance-including 100 MHz bandwidth and –75 dB THD-at this supply voltage.
How does the VOCM pin affect THS4120IDGNR output behavior?
The VOCM pin on the THS4120IDGNR sets the common-mode DC level of both differential outputs (VOUT+ and VOUT−) independently of input common-mode voltage. When VOCM = VDD/2, outputs swing symmetrically around 1.65 V. Applying an external voltage to VOCM shifts the entire differential output pair without altering gain or AC response-enabling flexible level-shifting for mismatched ADC input ranges.
What thermal considerations apply to the THS4120IDGNR MSOP PowerPAD™ package?
The THS4120IDGNR in the DGN package features an exposed thermal pad that must be soldered to a PCB copper pour for effective heat dissipation. With θJA = 58.4°C/W, failure to thermally connect the PowerPAD risks exceeding the 125°C maximum junction temperature during sustained 100-MHz operation. TI recommends using multiple thermal vias under the pad connected to an inner ground plane.
Is the THS4120IDGNR pin-compatible with other devices in the THS412x family?
Yes, the THS4120IDGNR shares identical 8-pin MSOP PowerPAD™ (DGN) pinout and footprint with THS4121IDGNR and THS4120CDGNR. Pin functions match across all variants except PD (pin 6), which is NC on THS4121IDGNR. This allows drop-in replacement in layouts designed for the THS412x family, provided power-down logic is disabled or tied high for non-THS4120 variants.
THS4120IDGNR 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:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 55V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 100 MHz
- Current - Input Bias:
- 1.2 pA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 11mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 3.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
THS4120IDGNR FAQ
1.How can I place an order for THS4120IDGNR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4120IDGNR 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 THS4120IDGNR reliable?
The price and inventory of THS4120IDGNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4120IDGNR is usually 5 days.
3.What payment methods are accepted for THS4120IDGNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4120IDGNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4120IDGNR?
THS4120IDGNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4120IDGNR 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 THS4120IDGNR?
For technical support, including THS4120IDGNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4120IDGNR requirements.
6.How does Aetrix verify that THS4120IDGNR is sourced from the original manufacturer or authorized distributors?
All THS4120IDGNR 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 THS4120IDGNR meets industry standards.
7.What is the process for return or replacement of THS4120IDGNR?
All THS4120IDGNR units undergo pre-shipment inspection (PSI). If there is an issue with THS4120IDGNR, 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 THS4120IDGNR part is unused and in its original packaging.
Return procedure for THS4120IDGNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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