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Texas Instruments TLV2548QDWRG4
- Part No.:
- TLV2548QDWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TLV2548QDWRG4.pdf
- Description:
- IC ADC 12BIT SAR 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,724
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Product details
Overview
TLV2548QDWRG4 from Texas Instruments is a 12-bit, 200-kSPS automotive-grade SAR analog-to-digital converter with integrated reference, 8× FIFO, and SPI/DSP-compatible serial interface. It operates from 3 V to 5.5 V, supports differential/nonlinearity error of ±1.2 LSB over −40°C to 125°C, and delivers 65 dB SNR at 12 kHz for precision sensor signal acquisition in engine control units.
For engineers reviewing the TLV2548QDWRG4 datasheet, TLV2548QDWRG4 pinout, TLV2548QDWRG4 application, or TLV2548QDWRG4 equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-qualified operating range (−40°C to 125°C), exact FIFO depth (8 words), and real-world sampling control options including hardware CSTART-triggered extended sampling.
Technical Context
The TLV2548QDWRG4 implements a charge redistribution SAR architecture with on-chip analog multiplexer selecting among eight single-ended analog inputs or three internal test voltages. Its conversion clock source is configurable between internal OSC, SCLK, SCLK/2, or SCLK/4 - enabling conversion times as low as 2.8 µs when using a 20-MHz SCLK.
It supports four conversion modes (one-shot, repeat, sweep, repeat-sweep) with programmable FIFO trigger levels (1/4 to full) and dual EOC/INT pin functionality. Sampling period is selectable as short (12 SCLKs) or long (24 SCLKs), and extended sampling is controlled asynchronously via dedicated CSTART pin with user-defined low-time duration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC with unipolar straight binary output (000h = VREFM, FFFh = VREFP − 1 LSB) |
| Max Throughput | 200 kSPS - achieved using external 20-MHz SCLK as conversion clock source |
| DNL/INL | ±1.2 LSB over −40°C to 125°C - ensures monotonicity and linearity in closed-loop automotive feedback systems |
| SNR & SFDR | 65 dB SNDR and 75 dB SFDR at 12-kHz input - suitable for high-fidelity sensor digitization in noisy engine bays |
| Supply Range | 3.0 V to 5.5 V - compatible with both 3.3-V microcontrollers and legacy 5-V automotive subsystems |
| Input Bandwidth | 500 kHz - supports anti-aliasing filter design for signals up to Nyquist frequency (100 kHz at 200 kSPS) |
| Power Consumption | 1.7 mA at 3.3 V (internal ref), 2.4 mA at 5.5 V (internal ref); 1 µA in software/hardware power-down mode |
Pinout & Package
TLV2548QDWRG4 is packaged in a 20-pin SOIC (DW) body with 0.300-inch width, RoHS-compliant, and qualified for automotive Q-temp operation (−40°C to 125°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable for serial interface; resets internal counter and enables SDI/SDO on falling edge (must occur while SCLK is low) |
| SCLK | Serial Clock Input | Accepts up to 20-MHz clock; serves as data shift clock and optional conversion clock source (configurable via CFR) |
| SDI | Serial Data Input | MSB-first command/data input (D15–D0); first 4 bits decode as command (e.g., channel select, CFR write, FIFO read) |
| SDO | Serial Data Output | 3-state MSB-first output; presents conversion result (12 bits + 4 don't-care) or CFR content depending on command |
| EOC/(INT) | Interrupt/End-of-Conversion Output | Configurable as EOC (mode 00 only) or INT (all other modes); falling edge indicates data ready for FIFO or CFR read |
| CSTART | Asynchronous Sampling Control | Falling edge initiates sampling; rising edge terminates sampling and starts conversion - independent of SCLK timing |
| A0–A7 | Analog Input Channels | Eight single-ended analog inputs; internally multiplexed; max source impedance 1 kΩ (higher impedances require CSTART or long sampling) |
| REFP / REFM | Reference Voltage Terminals | Support external reference or decouple internal 2-V/4-V reference; 10-µF + 0.1-µF capacitor pair required between REFP and REFM |
| PWDN | Power-Down Control | Logic-low disables analog and reference circuits; device resumes operation on next active CS, FS, or CSTART |
| FS | DSP Frame Sync Input | Indicates start of serial data frame; used with TMS320 DSPs; resets internal counter and enables SDI on falling edge |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 8-word FIFO | Reduces host processor interrupt load during burst sampling; supports programmable trigger thresholds (1/4 to full) |
| Hardware CSTART sampling control | Enables precise, asynchronous sampling period definition - critical for high-impedance sensors or variable SCLK rates |
| Dual internal reference options | Selectable 2-V or 4-V internal reference eliminates need for external voltage reference in cost-sensitive designs |
| Four conversion modes | One-shot, repeat, sweep, and repeat-sweep modes allow flexible data acquisition strategies without firmware overhead |
| Automotive Q-temp qualification | Tested and characterized from −40°C to 125°C per AEC-Q100 requirements - suitable for under-hood ECUs and transmission controllers |
Applications
| Engine Control Unit (ECU) | Transmission Control Module (TCM) |
|---|---|
|
Use Scenario: Digitizing throttle position, manifold absolute pressure (MAP), and coolant temperature sensor outputs in real time. IC Role / Device Role / Timing Role: 12-bit SAR ADC with 200-kSPS throughput and 500-kHz analog bandwidth acquires synchronized multi-channel sensor data for closed-loop fuel injection control. Use Value: Built-in FIFO and programmable sweep mode reduce CPU polling overhead; CSTART support accommodates high-impedance potentiometer-based sensors. |
Use Scenario: Monitoring turbine speed, oil temperature, and solenoid current feedback in automatic transmission systems. IC Role / Device Role / Timing Role: Automotive-qualified ADC interfaces directly to 3.3-V or 5-V MCUs via SPI, delivering stable 12-bit resolution across extreme under-hood thermal cycles. Use Value: Internal 4-V reference enables accurate ratiometric measurements against 5-V supply rails; power-down mode cuts quiescent current to 1 µA during idle states. |
| Electric Power Steering (EPS) | Brake-by-Wire Sensor Interface |
|
Use Scenario: Capturing torque sensor, motor phase current, and steering angle signals with deterministic latency. IC Role / Device Role / Timing Role: SAR ADC with configurable conversion clock (SCLK/4 or SCLK/2) ensures consistent 3.5-µs conversion time regardless of host clock jitter. Use Value: EOC/INT pin reconfiguration allows use of interrupt-driven acquisition in safety-critical EPS firmware; Q-temp rating guarantees reliability at 125°C ambient. |
Use Scenario: High-integrity acquisition of brake pedal travel, master cylinder pressure, and wheel speed sensor signals. IC Role / Device Role / Timing Role: Dual internal references (2 V / 4 V) and ±1.2 LSB INL support ASIL-B functional safety compliance through predictable analog performance. Use Value: Hardware CSTART pin enables precise sampling window alignment with mechanical actuator events - reducing timing uncertainty in brake response algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit automotive SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7816UB | 8-bit resolution, no FIFO, 200-kSPS, single 5-V supply only, no CSTART pin | Limited to lower-precision industrial monitoring; lacks automotive temp range and extended sampling capability | Choose only if 8-bit resolution suffices and system uses fixed 5-V rail with no need for multi-channel burst acquisition. |
| TLV2544QD | 4-channel variant (vs. 8-channel), same 12-bit SAR core, identical Q-temp rating and pin-compatible SOIC-16 package | Reduced channel count simplifies layout but requires external MUX for >4 sensors; shares same command set and register map | Select when system has ≤4 analog sensors and board space constraints favor smaller 16-pin SOIC footprint. |
Compared with TLV2548QDWRG4, ADS7816UB trades resolution and flexibility for cost and simplicity, while TLV2544QD offers identical automotive qualification and firmware compatibility at reduced channel count - making it a direct drop-in alternative where channel density permits.
Availability
TLV2548QDWRG4 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, electric power steering systems, and brake-by-wire sensor interfaces requiring stable component supply across automotive production lifecycles.
Supply support for TLV2548QDWRG4 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 automotive qualification expertise and broad portfolio of AEC-Q100-compliant components.
The TLV2548QDWRG4 belongs to TI's automotive-qualified SAR ADC product line, designed specifically for high-reliability signal acquisition in engine, transmission, chassis, and safety-critical electronic control units.
FAQ
What is the maximum sampling rate supported by the TLV2548QDWRG4?
The TLV2548QDWRG4 achieves a maximum throughput of 200 kSPS when using an external 20-MHz SCLK as the conversion clock source. This is documented in the datasheet's "Maximum Throughput" specification and confirmed by timing analysis showing 2.8-µs conversion time under those conditions. The TLV2548QDWRG4 maintains this rate across its full −40°C to 125°C automotive operating range.
Does the TLV2548QDWRG4 support external reference voltage?
Yes, the TLV2548QDWRG4 supports external reference voltage applied between REFP and REFM pins. Configuration bit D11 in the CFR register selects external reference mode. When enabled, the device ignores internal reference settings and uses the externally supplied voltage, allowing full-scale adjustment and improved system-level accuracy when paired with precision reference ICs.
How does the CSTART pin function in the TLV2548QDWRG4?
The CSTART pin on the TLV2548QDWRG4 provides asynchronous, hardware-controlled sampling initiation. A falling edge starts sampling; a rising edge ends sampling and triggers conversion - independent of SCLK timing. This is essential for high-impedance sensors or systems requiring deterministic sampling windows not tied to serial clock edges. The TLV2548QDWRG4 datasheet specifies minimum low-time requirements based on selected sampling mode.
What are the valid operating temperature ranges for the TLV2548QDWRG4?
The TLV2548QDWRG4 is characterized and qualified for operation from −40°C to 125°C, meeting automotive Q-temp requirements. This range is explicitly stated in the "AVAILABLE OPTIONS" table and functional description sections of the official datasheet (SGLS119F). It is not rated for extended −55°C operation like the TLV2548MFK variant.
Can the TLV2548QDWRG4 interface directly with a TMS320 DSP?
Yes, the TLV2548QDWRG4 supports direct interface with TMS320 DSPs using the FS (frame sync) pin. When FS is active, it serves as the serial frame delimiter and replaces CS as the primary synchronization signal. The device accepts data on SCLK falling edges in DSP mode and supports all four conversion modes - enabling seamless integration into TI's C2000 and C5000 DSP-based motor control and power conversion platforms.
TLV2548QDWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 8
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 3V ~ 5.5V
- Voltage - Supply, Digital:
- 3V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Supplier Device Package:
- 20-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLV2548QDWRG4 FAQ
1.How can I place an order for TLV2548QDWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2548QDWRG4 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 TLV2548QDWRG4 reliable?
The price and inventory of TLV2548QDWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2548QDWRG4 is usually 5 days.
3.What payment methods are accepted for TLV2548QDWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2548QDWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2548QDWRG4?
TLV2548QDWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2548QDWRG4 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 TLV2548QDWRG4?
For technical support, including TLV2548QDWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2548QDWRG4 requirements.
6.How does Aetrix verify that TLV2548QDWRG4 is sourced from the original manufacturer or authorized distributors?
All TLV2548QDWRG4 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 TLV2548QDWRG4 meets industry standards.
7.What is the process for return or replacement of TLV2548QDWRG4?
All TLV2548QDWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLV2548QDWRG4, 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 TLV2548QDWRG4 part is unused and in its original packaging.
Return procedure for TLV2548QDWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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