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Texas Instruments THS4505DRG4
- Part No.:
- THS4505DRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS4505DRG4.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,579
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Product details
Overview
THS4505DRG4 from Texas Instruments is a high-linearity, fully differential amplifier optimized for driving 12-bit, 80-MSps analog-to-digital converters (ADCs). It delivers 260 MHz small-signal bandwidth, 1800 V/µs slew rate, and –73 dBc third-order intermodulation distortion at 30 MHz under ±5 V supply - enabling high-fidelity signal conditioning in RF receiver chains and active filtering applications.
For engineers reviewing the THS4505DRG4 datasheet, THS4505DRG4 pinout, THS4505DRG4 application, or THS4505DRG4 equivalent, key selection criteria include its input common-mode range extending to the negative rail, VOCM-controlled output common-mode voltage, differential output drive capability up to ±7.4 V into 1 kΩ, and SOIC-8 packaging with PowerPAD™ thermal enhancement.
Technical Context
The THS4505DRG4 implements a fully differential architecture with independent input and output common-mode control paths. Its input stage supports single-ended-to-differential conversion while maintaining >70 dB CMRR across 0°C to +85°C, and its VOCM terminal enables precise setting of output common-mode voltage with 200 MHz small-signal bandwidth and ±0.1 V default offset when floating.
Unlike the pin-compatible THS4504, the THS4505DRG4 omits power-down functionality - eliminating PD pin dependency and simplifying biasing in continuous-operation systems. It operates from ±5 V to ±7.5 V dual supplies or 5 V to 15 V single supply, with quiescent current ranging from 9 mA (min) to 25 mA (max) over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 260 MHz at G = 1 (±5 V), enabling wideband baseband and IF signal amplification without gain peaking |
| Slew rate | 1800 V/µs (±5 V), supporting fast transient response for high-speed ADC front-ends |
| IMD3 distortion | –73 dBc at 30 MHz (200 kHz tone spacing), meeting linearity requirements for 12-bit ADC interfaces |
| OIP3 | 29 dBm at 30 MHz (50 Ω reference), suitable for demanding wireless receiver chain preamplification |
| Input common-mode range | –5.1 V to +2.0 V (±5 V), includes negative rail - simplifies interfacing with ground-referenced sensors |
| Quiescent current | 16–25 mA (±5 V, –40°C to +85°C), balances performance and power in thermally constrained layouts |
| VOCM control bandwidth | 200 MHz (±5 V, RL = 400 Ω), ensures stable common-mode feedback in high-frequency closed-loop designs |
Pinout & Package
THS4505DRG4 is housed in an 8-pin SOIC package with exposed thermal pad (PowerPAD™), providing enhanced thermal dissipation and improved ac performance versus standard SOIC. The package is RoHS-compliant and rated for operation from –40°C to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN− | Inverting input | Differential input node; accepts signals referenced to system ground or negative rail |
| VIN+ | Non-inverting input | Differential input node; paired with VIN− for balanced signal acquisition |
| VOCM | Output common-mode voltage control | DC-biased input sets output common-mode level; floats to ~0 V if unconnected (±5 V) |
| VS+ | Positive supply | Accepts +5 V to +7.5 V (dual) or +5 V to +15 V (single); decoupling required |
| VS− | Negative supply | Accepts –5 V to –7.5 V (dual); enables rail-to-rail input common-mode range |
| VOUT+ | Positive differential output | Drives ADC's positive input or transformer primary; swing up to ±7.4 V (±5 V, RL = 1 kΩ) |
| VOUT− | Negative differential output | Complementary output to VOUT+; maintains balance within –65 dB error @ 100 kHz |
| PD | Power-down control | No internal connection on THS4505DRG4; pin left unconnected or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential architecture | Eliminates even-order harmonics and improves PSRR/CMRR vs single-ended amps |
| Input common-mode range includes VS− | Enables direct interface with ground-referenced sources without level-shifting circuitry |
| Output common-mode voltage control (VOCM) | Allows precise matching to ADC input common-mode requirements across process/voltage/temperature |
| Wide supply range (±5 V to ±7.5 V / 5 V to 15 V) | Supports legacy ±5 V systems and modern single-supply 12 V industrial designs |
| SOIC-8 with PowerPAD™ | Reduces thermal resistance (θJA = 97.5°C/W) versus standard SOIC, improving long-term reliability |
Applications
| Wireless Communication Receiver Chain | Analog-to-Digital Converter Preamplifier |
|---|---|
Use Scenario: Amplifying downconverted IF signals in LTE/FDD base stations before digitization. IC Role / Device Role / Timing Role: Fully differential driver between mixer and 12-bit, 80-MSps ADC, preserving SNR and SFDR. Use Value: –73 dBc IMD3 at 30 MHz ensures minimal spectral regrowth; 260 MHz bandwidth accommodates 20-MHz LTE channels. | Use Scenario: Conditioning sensor outputs (e.g., precision strain gauge bridges) prior to high-resolution sampling. IC Role / Device Role / Timing Role: Single-ended-to-differential converter and gain stage feeding SAR or pipeline ADC inputs. Use Value: Input common-mode range including VS− allows direct connection to low-side current-sense amplifiers without level shifters. |
| Differential Line Driver | Active Filtering of Differential Signals |
Use Scenario: Driving long PCB traces or cables between FPGA-based signal processors and remote ADC modules. IC Role / Device Role / Timing Role: High-current differential output buffer (130 mA min) with matched VOUT+/VOUT− timing. Use Value: ±7.4 V differential swing into 1 kΩ and <1 ns rise/fall times maintain signal integrity over 10-cm FR4 traces. | Use Scenario: Implementing anti-aliasing or reconstruction filters in instrumentation-grade data acquisition systems. IC Role / Device Role / Timing Role: Active filter core in 2nd-order MFB or Sallen-Key topology with programmable common-mode setpoint. Use Value: VOCM control enables filter output common-mode alignment to downstream ADC reference, reducing DC offset errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4504DRG4 | Identical pinout and AC specs, but includes functional PD pin for power-down mode (800 µA quiescent in shutdown) | Required where intermittent operation or low-power sleep states are mandated (e.g., battery-powered test equipment) | Select THS4504DRG4 only if power-down functionality is explicitly needed; THS4505DRG4 offers simpler biasing and identical performance in always-on systems |
| LMH5401IRGT | Higher bandwidth (1.8 GHz), higher OIP3 (+38 dBm), but requires external VOCM resistor network and has narrower input common-mode range | Better suited for >100 MHz IF sampling or mmWave receiver front-ends where THS4505DRG4 bandwidth is limiting | Choose LMH5401IRGT when >500 MHz small-signal bandwidth or >35 dBm OIP3 is required; THS4505DRG4 remains optimal for cost-sensitive 12-bit, 80-MSps ADC interfaces |
Compared with THS4504DRG4, THS4505DRG4 removes power-down complexity while retaining full linearity and bandwidth - ideal for fixed-configuration signal chains. Versus LMH5401IRGT, it trades raw RF performance for integrated VOCM control, rail-inclusive input range, and lower system-level BOM count.
Availability
THS4505DRG4 is available at Aetrix Electronics and suitable for wireless infrastructure, precision data acquisition, and industrial instrumentation requiring stable component supply, consistent parametric performance across temperature, and long-term manufacturing continuity.
Supply support for THS4505DRG4 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-speed amplifier design and signal-chain solutions.
The THS4505DRG4 belongs to TI's high-performance fully differential amplifier product line, engineered specifically for driving high-speed ADCs in communications, test equipment, and medical imaging systems where linearity, bandwidth, and common-mode flexibility are critical.
FAQ
What is the maximum supply voltage rating for THS4505DRG4?
The absolute maximum supply voltage for THS4505DRG4 is ±8.25 V (dual) or 16.5 V (single), but the recommended operating range is ±5 V to ±7.5 V for dual supplies or 4.5 V to 15 V for single supply. Operation beyond ±7.5 V may increase distortion and reduce reliability; the datasheet specifies guaranteed performance only within the recommended range. THS4505DRG4 must be operated with proper decoupling capacitors (e.g., 0.1 µF ceramic + 10 µF tantalum) at each supply pin.
Does THS4505DRG4 support single-ended input configurations?
Yes, THS4505DRG4 supports single-ended-to-differential conversion using standard resistor networks (e.g., 499 Ω gain-setting resistors). The input common-mode range extends to the negative supply rail, allowing direct connection of ground-referenced sources without level-shifting circuitry. Performance metrics such as IMD3 and harmonic distortion are specified under single-ended input conditions in the datasheet, confirming validated use in this configuration. THS4505DRG4 maintains >70 dB CMRR across temperature in such setups.
What is the function of the PD pin on THS4505DRG4?
The PD (power-down) pin on THS4505DRG4 is not internally connected - it is a no-connect (NC) terminal. Unlike the THS4504 variant, the THS4505DRG4 does not implement power-down functionality. The pin should be left unconnected or tied to ground per PCB layout best practices to avoid floating nodes. This design choice simplifies biasing and eliminates timing concerns associated with power-state transitions, making THS4505DRG4 ideal for always-on signal-path applications.
How does VOCM control work on THS4505DRG4, and what happens if it's left unconnected?
On THS4505DRG4, the VOCM pin sets the output common-mode voltage via an internal amplifier with 200 MHz bandwidth. When driven with a stable DC voltage (e.g., 2.5 V), it forces VOUT+ and VOUT− to center around that level. If left unconnected under ±5 V supply, VOCM defaults to approximately 0 V ±0.1 V, resulting in output common-mode near midsupply (0 V). For single-supply operation (e.g., 5 V), the default shifts to ~2.5 V. External buffering is recommended for low-impedance VOCM drive in noise-sensitive applications.
Can THS4505DRG4 drive a 50 Ω differential load directly?
THS4505DRG4 is not designed to drive a 50 Ω differential load continuously - its minimum specified load is 20 Ω per side (i.e., 40 Ω differential), with output current drive rated at ≥100 mA (min) into 20 Ω. Driving 50 Ω differentially would require ≥100 mA peak current at ±4 V swing, exceeding safe operating area limits and risking thermal overload. For 50 Ω systems, use external 1:2 balun or series termination (e.g., 25 Ω per leg) to present ≥100 Ω to THS4505DRG4 outputs while maintaining signal integrity. THS4505DRG4 datasheet specifies performance into 800 Ω and 1 kΩ loads.
THS4505DRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 1800V/µs
- Gain Bandwidth Product:
- 210 MHz
- -3db Bandwidth:
- 260 MHz
- Current - Input Bias:
- 4 µA
- Voltage - Input Offset:
- 4 mV
- Current - Supply:
- 16mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 15 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
THS4505DRG4 FAQ
1.How can I place an order for THS4505DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4505DRG4 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 THS4505DRG4 reliable?
The price and inventory of THS4505DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4505DRG4 is usually 5 days.
3.What payment methods are accepted for THS4505DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4505DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4505DRG4?
THS4505DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4505DRG4 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 THS4505DRG4?
For technical support, including THS4505DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4505DRG4 requirements.
6.How does Aetrix verify that THS4505DRG4 is sourced from the original manufacturer or authorized distributors?
All THS4505DRG4 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 THS4505DRG4 meets industry standards.
7.What is the process for return or replacement of THS4505DRG4?
All THS4505DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with THS4505DRG4, 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 THS4505DRG4 part is unused and in its original packaging.
Return procedure for THS4505DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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