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Texas Instruments TLC3541IDRG4
- Part No.:
- TLC3541IDRG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC3541IDRG4.pdf
- Description:
- IC ADC 14BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,846
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Product details
Overview
TLC3541IDRG4 from Texas Instruments is a 14-bit, single-channel unipolar successive-approximation analog-to-digital converter (SAR ADC) operating from a single 5-V supply. It delivers 200-KSPS sampling rate, ±1 LSB INL/DNL accuracy, and 81.5 dB SINAD at 15 kHz input - optimized for precision industrial measurement and motor control feedback loops.
For engineers reviewing the TLC3541IDRG4 datasheet, TLC3541IDRG4 pinout, TLC3541IDRG4 application, or TLC3541IDRG4 equivalent, key selection criteria include SPI/DSP serial interface compatibility (FS/CS dual-mode), rail-to-rail 500 kHz analog input bandwidth, auto-power-down current of 5 µA, and SOIC-8 package suitability for space-constrained embedded signal acquisition.
Technical Context
The TLC3541IDRG4 implements a charge-redistribution SAR architecture with an integrated oscillator-based conversion clock (max 2.67 µs conversion time). Its digital interface supports three operational modes: SPI-only (CS-controlled), DSP frame-sync only (FS-controlled), or hybrid CS+FS - enabling flexible integration with TMS320-series DSPs and microcontrollers.
It features a dedicated FS input (Pin 7) for DSP synchronization, while CS (Pin 1) manages chip select and reset initialization. The device samples on AIN (Pin 4), references externally via REF (Pin 2), and outputs 14-bit unipolar straight-binary data MSB-first on SDO (Pin 8) synchronized to SCLK (Pin 5) up to 15 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit unipolar straight-binary output; full-scale code = 3FFFh (16383 decimal) for VREF input. |
| Sampling Rate | 200 KSPS maximum; enables real-time capture of signals up to 100 kHz Nyquist bandwidth. |
| SINAD / SNR | 81.5 dB / 82 dB at 15 kHz input; ensures ≥13.2 ENOB for high-fidelity sensor or encoder signal digitization. |
| INL / DNL | ±1 LSB max integral and differential nonlinearity; guarantees monotonicity and <0.006% full-scale linearity error. |
| Supply & Power | Single 4.5–5.5 V supply; 3.5 mA active current, 5 µA auto-power-down current - suitable for low-duty-cycle sensing nodes. |
| Analog Input | Rail-to-rail unipolar input (0 V to VDD) with 500 kHz −1 dB bandwidth; supports direct connection to op-amp buffers or resistive sensors. |
| Serial Interface | SPI/DSP-compatible 3-wire interface (CS/SCLK/SDO); FS pin enables frame-sync timing for deterministic DSP data framing. |
Pinout & Package
Package: 8-pin SOIC (D), RoHS-compliant, moisture sensitivity level 1, rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN (Pin 4) | Analog input channel | Single-ended unipolar input node; accepts 0 V to VDD signals with 11 pF input capacitance and rail-to-rail common-mode range. |
| CS (Pin 1) | Chip select | Active-low enable that releases SDO from high-impedance state; also initiates RESET cycle (1–8 SCLK falling edges required). |
| FS (Pin 7) | DSP frame sync | Low-to-high edge triggers MSB output on SDO; used exclusively with TLC3541 for TMS320 DSP timing alignment (not present on TLC3545). |
| GND (Pin 3) | Ground reference | Common return for analog and digital circuitry; all voltage measurements referenced to this pin. |
| SDO (Pin 8) | Serial data output | 3-state MSB-first output; data valid on falling SCLK edge; returns to high-Z after 17th SCLK rising edge or rising CS edge. |
| SCLK (Pin 5) | Serial clock input | Accepts up to 15 MHz clock; defines timing for data sampling and shifting; requires 40/60 duty cycle per spec. |
| REF (Pin 2) | External reference input | Accepts 4–VDD reference voltage; sets full-scale range; input impedance 20–25 kΩ when active, 100 MΩ when CS = 1. |
| VDD (Pin 6) | Positive supply | 4.5–5.5 V single supply; powers internal SAR, logic, and reference buffer; decoupling with 0.1 µF recommended. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in conversion clock | Eliminates external crystal or clock generator; enables fixed 2.67 µs max conversion time independent of host SCLK. |
| Dual-mode serial interface | Supports both SPI (CS-driven) and TMS320 DSP (FS-driven) protocols in same hardware - no PCB change needed for either host. |
| Rail-to-rail analog input | 0 V to VDD input range with 500 kHz −1 dB bandwidth allows direct interfacing with unity-gain op-amps or resistive dividers. |
| Auto-power-down mode | Enters 5 µA sleep state automatically after conversion completes; wake-up latency is negligible for burst-sampling applications. |
| Pin-compatible family | Shares SOIC-8 and MSOP-8 footprints with 12-/14-/16-bit TLC35xx variants - enables resolution scaling without layout revision. |
Applications
| Industrial Process Monitoring | Motor Phase Current Sensing |
|---|---|
|
Use Scenario: Continuous voltage/current monitoring of PLC analog I/O modules with 4–20 mA loop interfaces. IC Role / Device Role / Timing Role: Primary 14-bit digitizer for conditioned sensor outputs; synchronized to controller's scan cycle via CS-triggered sampling. Use Value: ±1 LSB linearity ensures <0.006% full-scale error in closed-loop PID tuning, critical for regulatory compliance in process automation. |
Use Scenario: Real-time sampling of shunt-resistor voltage drops across 3-phase inverter legs in servo drives. IC Role / Device Role / Timing Role: High-speed unipolar ADC capturing current waveforms at 200 KSPS; FS pin aligned to PWM carrier edge for jitter-free timing. Use Value: 500 kHz analog bandwidth preserves fast current transients; 81.5 dB SINAD enables accurate RMS calculation for torque estimation. |
| ATE System Channel Digitizer | High-Accuracy Sensor Signal Conditioning |
|
Use Scenario: Modular test instrument channel acquiring DC/low-frequency analog stimuli from DUTs under programmable gain. IC Role / Device Role / Timing Role: Precision front-end ADC with external VREF for calibrated voltage measurement; SPI interface enables dense channel packing. Use Value: 82 dB SNR and ±1 LSB DNL guarantee metrology-grade repeatability; auto-power-down reduces thermal drift between test sequences. |
Use Scenario: Digitizing outputs from strain gauges, RTDs, or thermocouples in environmental monitoring nodes. IC Role / Device Role / Timing Role: Low-power SAR ADC with rail-to-rail input accepting buffered sensor signals; operates from single 5-V rail with minimal support components. Use Value: 3.5 mA active current and 5 µA sleep current extend battery life in wireless sensor nodes; 14-bit resolution resolves sub-millivolt changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7816U | 16-bit resolution, 200 KSPS, SPI-only interface (no FS pin), 5.25 V max supply, higher 92 dB SFDR. | Lacks DSP frame-sync capability; requires external clock; better suited for high-resolution lab equipment than real-time motor control. | Select when absolute linearity >16-bit and DSP timing alignment is unnecessary. |
| TLC3545IDRG4 | Pseudo-differential input (AIN+/AIN−), identical package/timing/power, same 14-bit resolution and 200 KSPS rate. | Designed for noise-rejecting differential measurements (e.g., bridge sensors); incompatible with unipolar single-ended use cases. | Choose only when measuring differential signals with common-mode rejection requirements - not a drop-in replacement. |
Compared with ADS7816U and TLC3545IDRG4, the TLC3541IDRG4 uniquely balances 14-bit precision, DSP frame-sync timing, and unipolar simplicity - making it optimal for cost-sensitive industrial controllers requiring deterministic sampling without external clocking or differential front-ends.
Availability
TLC3541IDRG4 is available at Aetrix Electronics and suitable for industrial process control, motor control feedback, and automated test equipment requiring stable component supply across long production lifecycles.
Supply support for TLC3541IDRG4 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 connectivity technologies with over 50 years of innovation in precision data converters.
The TLC35xx family was designed specifically for high-speed, low-power industrial data acquisition - delivering pin-compatible 12/14/16-bit SAR ADCs with integrated clocks and DSP-friendly serial interfaces.
FAQ
What is the maximum SCLK frequency supported by the TLC3541IDRG4?
The TLC3541IDRG4 supports serial clock frequencies up to 15 MHz, as specified in the recommended operating conditions. At this rate, the minimum SCLK cycle time is 66 ns, and timing margins remain valid for reliable 14-bit data transfer. Operation above 15 MHz is not guaranteed and may violate setup/hold requirements for SDO data validity.
Does the TLC3541IDRG4 require an external clock source for conversion?
No, the TLC3541IDRG4 does not require an external clock source for conversion. It includes a built-in oscillator that generates the internal conversion clock, resulting in a fixed maximum conversion time of 2.67 µs. The external SCLK is used solely for serial data transfer timing, not for the ADC core operation.
Can the TLC3541IDRG4 operate with a 3.3-V supply?
No, the TLC3541IDRG4 is specified for 4.5 V to 5.5 V operation only. Its absolute maximum supply rating is 6.5 V, and the recommended minimum is 4.5 V. Using 3.3 V violates the recommended operating conditions and will result in undefined behavior, including failure to power up internal reference and SAR logic.
What is the function of the FS pin on the TLC3541IDRG4?
The FS (frame sync) pin on the TLC3541IDRG4 is a dedicated input for TMS320-series DSPs that provides deterministic timing alignment. A low-to-high transition on FS initiates the serial data frame and presents the MSB on SDO, enabling precise synchronization with DSP instruction cycles - a feature absent on the TLC3545 variant.
How does the auto-power-down mode work on the TLC3541IDRG4?
The TLC3541IDRG4 enters auto-power-down mode automatically at the end of each conversion cycle, reducing supply current to 5 µA. It wakes up on the next falling edge of CS (or rising edge of FS, whichever occurs first), with negligible latency - allowing rapid burst sampling without software-controlled power sequencing.
TLC3541IDRG4 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
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLC3541IDRG4 FAQ
1.How can I place an order for TLC3541IDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC3541IDRG4 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 TLC3541IDRG4 reliable?
The price and inventory of TLC3541IDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC3541IDRG4 is usually 5 days.
3.What payment methods are accepted for TLC3541IDRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC3541IDRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC3541IDRG4?
TLC3541IDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC3541IDRG4 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 TLC3541IDRG4?
For technical support, including TLC3541IDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC3541IDRG4 requirements.
6.How does Aetrix verify that TLC3541IDRG4 is sourced from the original manufacturer or authorized distributors?
All TLC3541IDRG4 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 TLC3541IDRG4 meets industry standards.
7.What is the process for return or replacement of TLC3541IDRG4?
All TLC3541IDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC3541IDRG4, 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 TLC3541IDRG4 part is unused and in its original packaging.
Return procedure for TLC3541IDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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