My Inquiry
My Account
Texas Instruments THS4151CDGK
- Part No.:
- THS4151CDGK
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
THS4151CDGK.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,456
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
THS4151CDGK from Texas Instruments is a high-speed fully differential amplifier optimized for precision ADC driving, featuring 150 MHz –3 dB bandwidth (VCC = ±5 V), 650 V/µs slew rate (VCC = ±15 V), –83 dB total harmonic distortion at 1 MHz, 7.6 nV/√Hz input-referred voltage noise, and dual-supply operation from ±2.5 V to ±15 V. It serves as a single-ended-to-differential or differential-to-differential signal converter in high-fidelity data acquisition systems.
For engineers reviewing the THS4151CDGK datasheet, THS4151CDGK pinout, THS4151CDGK application, or THS4151CDGK equivalent, this device is selected for demanding analog front-end roles requiring balanced output swing, common-mode noise rejection, low distortion at multi-MHz frequencies, and stable performance across wide supply ranges - especially in 12–16-bit SAR and pipeline ADC interfaces.
Technical Context
The THS4151CDGK implements a true fully differential signal path from input to output using TI's BiComI complementary bipolar process, enabling intrinsic common-mode noise rejection and second-harmonic cancellation. Its architecture supports both differential-input/differential-output and single-ended-input/differential-output configurations with gain set by external resistor networks (e.g., Rf = 390 Ω, Rg = 390 Ω for G = 1).
It features an actively controlled VOCM pin that sets output common-mode level independently of input, allowing seamless interfacing with ADC reference voltages (e.g., Vref → VOCM via 0.1 µF bypass). The device lacks shutdown functionality (unlike THS4150), confirmed by absence of PD pin and omission of ICC(SD) specs in its electrical characteristics table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (–3 dB) | 150 MHz at ±5 V supply - enables accurate amplification of signals up to Nyquist frequency of 75 MSPS ADCs without gain peaking. |
| Slew Rate | 650 V/µs at ±15 V - supports full-scale transient response for >12-bit resolution at ≥10 MSPS sampling rates. |
| Total Harmonic Distortion | –83 dB at 1 MHz, 2 Vpp output - preserves SFDR >87 dB for high-dynamic-range digitization in instrumentation. |
| Input Voltage Noise | 7.6 nV/√Hz above 10 kHz - limits added noise floor when driving low-noise, high-resolution ADCs (e.g., THS1206, THS1050). |
| Output Swing | ±3.6 V (min) at ±5 V supply - delivers 7.2 Vpp differential output into 800 Ω load, matching typical ADC input ranges. |
| Supply Range | ±2.5 V to ±15 V dual supply or 5 V to 30 V single supply - supports flexible system-level power architecture including mixed-signal rails. |
| Common-Mode Input Range | VS– + 1.5 V to VS+ – 1.5 V - accommodates input signals near rail without clipping in buffered sensor interfaces. |
Pinout & Package
THS4151CDGK is housed in an 8-pin MSOP PowerPAD™ package (DGK), thermally enhanced with an exposed die pad requiring PCB thermal vias for reliable operation at full power dissipation (385 mW at TA = 25°C). Pin numbering follows standard MSOP top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN− | Inverting input | Differential input node; paired with VIN+ to define VID = VIN+ − VIN−; requires matched trace routing for CMRR optimization. |
| VOCM | Output common-mode control | DC bias setting point for both outputs; connects directly to ADC Vref or midrail; bypassed with 0.1 µF capacitor for noise immunity. |
| VCC+ | Positive supply | Accepts +2.5 V to +15 V (dual) or +5 V to +30 V (single); must be decoupled with local 0.1 µF ceramic capacitor. |
| VOUT+ | Positive differential output | Delivers amplified, phase-aligned signal relative to VOUT−; drives one side of differential ADC input or transmission line. |
| VIN+ | Non-inverting input | Differential input node; symmetric layout with VIN− critical to preserve >83 dB CMRR over frequency. |
| NC | No connect | Unbonded pin; must remain unconnected and unrouted to avoid parasitic coupling or EMI susceptibility. |
| VCC− | Negative supply | Accepts –2.5 V to –15 V (dual); ties to ground in single-supply mode; requires independent decoupling. |
| VOUT− | Negative differential output | Delivers inverted, complementary signal to VOUT+; forms true differential pair with 180° phase relationship. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential I/O architecture | Enables inherent common-mode noise rejection (>83 dB CMRR) and second-harmonic cancellation without external balancing components. |
| Wide supply flexibility | Operates from ±2.5 V to ±15 V dual supply or 5 V to 30 V single supply - simplifies integration into mixed-voltage industrial and test equipment. |
| High dynamic range | Delivers 7.2 Vpp differential swing at ±5 V supply - provides 2× voltage headroom vs. single-ended amps, preserving SNR in 16-bit ADC interfaces. |
| Low distortion at high frequency | –65 dB THD maintained at 8 MHz (±5 V), supporting anti-aliasing filter design for >4 MSPS data converters. |
| Thermally robust PowerPAD™ package | MSOP-DGK package with exposed thermal pad reduces θJA to 260°C/W - enables stable operation at 125°C junction temperature with proper PCB heatsinking. |
Applications
| ADC Driver for High-Speed Data Acquisition | Differential Signal Conditioning in Instrumentation |
|---|---|
|
Use Scenario: Driving the differential inputs of a 14-bit, 10 MSPS pipeline ADC (e.g., THS1050) in automated test equipment with ±5 V analog supply rails. IC Role / Device Role / Timing Role: Single-ended-to-differential conversion and level shifting, referenced to ADC Vref via VOCM pin, ensuring optimal common-mode alignment and minimizing code-dependent offset errors. Use Value: Achieves >87 dB SFDR and <0.01% THD at 1 MHz, directly enabling full utilization of ADC ENOB without post-processing correction. |
Use Scenario: Amplifying low-level bridge sensor outputs (e.g., strain gauge, RTD) in precision weigh scales before digitization. IC Role / Device Role / Timing Role: Differential input stage rejecting EMI-coupled noise on long sensor cables, followed by balanced output delivery to isolated ADC inputs. Use Value: Maintains >83 dB CMRR up to 10 MHz, suppressing 50/60 Hz mains interference and improving measurement repeatability to ±0.005% FS. |
| Active Antialias Filtering Interface | Single-Supply Signal Chain Level Shifting |
|
Use Scenario: Integrating into a 4th-order active antialias filter preceding a 12-bit SAR ADC in medical ECG front-end design. IC Role / Device Role / Timing Role: Output buffer and gain stage within filter topology, maintaining impedance match and minimizing group delay variation across passband. Use Value: Delivers flat frequency response to 150 MHz with <0.1 dB ripple, ensuring alias-free digitization of bio-signals up to 100 kHz. |
Use Scenario: Converting 0–3.3 V microcontroller DAC output to ±2.5 V differential signal for driving a 16-bit audio ADC in portable audio gear. IC Role / Device Role / Timing Role: Level shifter and polarity inverter, using VOCM = 0 V and single +5 V supply to generate symmetrical ±2.5 V outputs. Use Value: Eliminates need for external op-amp level-shifting stages, reducing BOM count and PCB area while preserving THD < –80 dB at 20 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4131CDGN | 150 MHz BW, 51 V/µs SR, 1.3 nV/√Hz noise - lower noise but slower slew rate than THS4151CDGK. | Better suited for low-noise, moderate-speed applications (e.g., 16-bit, ≤2 MSPS ADCs); less ideal for fast transients. | Select THS4131CDGN when input-referred noise dominates system SNR budget and slew-limited settling is acceptable. |
| THS4141CDGN | 160 MHz BW, 450 V/µs SR, 6.5 nV/√Hz noise - higher bandwidth and slew rate, but 1.1 nV/√Hz noisier than THS4151CDGK. | Preferred for ultra-fast settling (<50 ns) in 12-bit, ≥20 MSPS systems where THD > –75 dB is sufficient. | Choose THS4141CDGN when speed is critical and THD specification can be relaxed to –75 dB at 1 MHz. |
Compared with THS4131CDGN and THS4141CDGN, the THS4151CDGK offers the best balance of low distortion (–83 dB THD), high slew rate (650 V/µs), and moderate noise (7.6 nV/√Hz), making it optimal for 12–14-bit, 10–15 MSPS data acquisition where fidelity and transient response are both essential.
Availability
THS4151CDGK is available at Aetrix Electronics and suitable for high-speed data acquisition, precision instrumentation, and medical signal conditioning requiring stable component supply and long-term industrial lifecycle support.
Supply support for THS4151CDGK 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 amplifier design and manufacturing.
The THS415x family was engineered specifically for high-fidelity differential signal conditioning in data converter interfaces, emphasizing bandwidth, linearity, and noise performance for test & measurement, industrial automation, and communications infrastructure.
FAQ
What is the function of the VOCM pin on the THS4151CDGK?
The VOCM pin on the THS4151CDGK sets the common-mode DC level of both differential outputs (VOUT+ and VOUT−). When left unconnected, it defaults to midrail (VCC/2 in single-supply mode). For optimal ADC interface performance, TI recommends connecting it directly to the ADC's reference voltage (Vref) through a 0.1 µF bypass capacitor to stabilize the output common-mode point and suppress noise coupling. This ensures precise alignment with the ADC input range and minimizes offset errors in THS4151CDGK-based signal chains.
Does the THS4151CDGK support shutdown mode?
No, the THS4151CDGK does not support shutdown mode. Unlike the THS4150 (which includes a PD pin and specifies ICC(SD) = 1 mA), the THS4151CDGK omits the power-down pin and contains no shutdown-related electrical specifications in its datasheet. Its pinout shows NC (no connect) at pin 6 instead of PD, and all quiescent current values listed apply only to active operation. Therefore, THS4151CDGK must remain powered during system operation and cannot be placed into low-current standby.
What is the recommended resistor tolerance for external gain-setting networks used with THS4151CDGK?
Texas Instruments specifies that resistor matching is critical for THS4151CDGK performance: mismatch degrades CMRR, PSRR, and second-harmonic cancellation. The datasheet explicitly recommends using 1% tolerance or better resistors for Rf and Rg networks. For example, with Rf = Rg = 390 Ω (gain = 1), 1% tolerance ensures ratio error ≤0.02, preserving >83 dB CMRR up to 1 MHz. Tighter tolerances (e.g., 0.1%) further improve distortion performance in THS4151CDGK circuits targeting <–90 dB THD.
Can THS4151CDGK drive capacitive loads directly?
The THS4151CDGK is not optimized for direct capacitive loading: its internal compensation prioritizes bandwidth and slew rate, making it susceptible to ringing or oscillation with >10 pF loads. TI recommends inserting a 20 Ω series resistor between each output (VOUT+, VOUT−) and the capacitive load - for instance, in ADC input filtering or PCB trace routing. This isolates the amplifier from capacitance while maintaining signal integrity; in 50 Ω systems, the 20 Ω resistor also provides source-end impedance matching. Without this isolation, THS4151CDGK may exhibit instability above 10 MHz.
How does the THS4151CDGK differ from THS4150CDGK in terms of pin compatibility and functionality?
The THS4151CDGK and THS4150CDGK share identical 8-pin DGK MSOP PowerPAD™ packages and pinouts (VIN−, VOCM, VCC+, VOUT+, VIN+, NC, VCC−, VOUT−), making them physically pin-compatible. However, THS4150CDGK substitutes NC with a PD (power-down) pin and supports shutdown mode (ICC(SD) = 1 mA), whereas THS4151CDGK has no shutdown capability. All other AC/DC specifications - bandwidth, THD, noise, output swing - are identical per datasheet tables. Thus, THS4151CDGK is a functional subset of THS4150CDGK with identical performance but no power-down feature.
THS4151CDGK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 650V/µs
- Gain Bandwidth Product:
- 340 MHz
- -3db Bandwidth:
- 150 MHz
- Current - Input Bias:
- 4.3 µA
- Voltage - Input Offset:
- 1.1 mV
- Current - Supply:
- 17.5mA
- Current - Output / Channel:
- 85 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 33 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
THS4151CDGK FAQ
1.How can I place an order for THS4151CDGK through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4151CDGK 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 THS4151CDGK reliable?
The price and inventory of THS4151CDGK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4151CDGK is usually 5 days.
3.What payment methods are accepted for THS4151CDGK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4151CDGK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4151CDGK?
THS4151CDGK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4151CDGK 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 THS4151CDGK?
For technical support, including THS4151CDGK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4151CDGK requirements.
6.How does Aetrix verify that THS4151CDGK is sourced from the original manufacturer or authorized distributors?
All THS4151CDGK 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 THS4151CDGK meets industry standards.
7.What is the process for return or replacement of THS4151CDGK?
All THS4151CDGK units undergo pre-shipment inspection (PSI). If there is an issue with THS4151CDGK, 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 THS4151CDGK part is unused and in its original packaging.
Return procedure for THS4151CDGK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
THS4151CDGK 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…
