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Texas Instruments TLV2544QD
- Part No.:
- TLV2544QD
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLV2544QD.pdf
- Description:
- IC ADC 12BIT SAR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,358
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Product details
Overview
TLV2544QD from Texas Instruments is a 12-bit, 200-KSPS automotive-grade SAR analog-to-digital converter with built-in reference, conversion clock, and 8× FIFO. It operates from a single 3-V to 5.5-V supply, supports SPI/DSP serial interfaces up to 20 MHz, and delivers ±1.2 LSB differential/integral nonlinearity across −40°C to 125°C - used in engine control unit (ECU) sensor signal digitization.
For engineers reviewing the TLV2544QD datasheet, TLV2544QD pinout, TLV2544QD application, or TLV2544QD equivalent, key selection considerations include its Q-temp automotive qualification, programmable sampling period (12/24 SCLK), hardware CSTART-controlled extended sampling, internal 2-V/4-V reference options, and 16-pin SOIC (D) package compatibility with industrial motor control and battery management systems.
Technical Context
The TLV2544QD implements a charge redistribution SAR architecture with break-before-make analog multiplexer for 4-channel input selection and three internal test voltage sources. Its conversion clock is configurable to internal OSC, SCLK, SCLK/2, or SCLK/4 - enabling conversion times as low as 3.5 µs with external 20-MHz SCLK.
It supports four conversion modes (one-shot, repeat, sweep, repeat-sweep), each with programmable FIFO trigger levels (1/4 to full) and EOC/INT pin function selection. Sampling is initiated via CS (SPI), FS (DSP), or asynchronous CSTART - with hardware-controlled sampling period independent of SCLK timing in extended mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC - delivers 4096 discrete output codes for precise sensor signal digitization. |
| Max Throughput | 200 KSPS - supports real-time acquisition in automotive closed-loop control applications. |
| DNL/INL | ±1.2 LSB over −40°C to 125°C - ensures monotonicity and linearity without calibration in harsh environments. |
| SNR + Distortion | 65 dB at 12 kHz - sufficient for high-fidelity analog sensor interface in ECU and transmission control modules. |
| Supply Range | 3 V to 5.5 V - compatible with both 3.3-V and 5-V microcontroller domains without level-shifting. |
| Analog BW | 500 kHz - supports anti-aliasing filter design for DC–100 kHz sensor signals including throttle position and knock detection. |
| Power Consumption | 1.7 mA at 3.3 V (internal ref), 1 µA in software power-down - enables low-quiescent current operation in always-on vehicle subsystems. |
Pinout & Package
TLV2544QD is housed in a 16-pin SOIC (D) package with 1.27-mm pitch, RoHS-compliant, and qualified per AEC-Q100 Grade 1 (−40°C to 125°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low SPI frame initiator; resets internal counter and enables SDI/SDO on falling edge (must occur when SCLK = low). |
| SCLK | Serial Clock Input | Up to 20-MHz SPI clock; also selectable as conversion clock source (SCLK, SCLK/2, or SCLK/4). |
| SDI | Serial Data Input | MSB-first command/data input (4-bit CMR + 12-bit CFR); accepts channel select, config write, FIFO read commands. |
| SDO | Serial Data Output | 3-state MSB-first output; delivers 12-bit conversion result + 4 don't-care bits during FIFO/convert cycles. |
| EOC/(INT) | End-of-Conversion / Interrupt Output | Configurable as EOC (mode 00 only) or INT (all other modes); asserts low when data ready for host read. |
| CSTART | Asynchronous Sampling Control | Falling edge starts sampling; rising edge ends sampling and triggers conversion - enables user-defined sample time independent of SCLK. |
| A0–A3 | Analog Input Channels | Four single-ended analog inputs; multiplexed internally; max 1-kΩ source impedance recommended. |
| PWDN | Power-Down Control | Logic-low disables analog and reference circuits; resumes operation on next active CS/FS/CSTART edge. |
| REFP / REFM | Reference Voltage Terminals | Support internal 2-V/4-V reference or external reference; require 10-µF + 0.1-µF decoupling between pins. |
| VCC / GND | Power Supply | Single 3–5.5-V supply; GND serves as analog/digital reference return for all internal circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Q-Temp Automotive Qualification | Qualified to AEC-Q100 Grade 1 (−40°C to 125°C) with configuration control and production traceability for safety-critical ECUs. |
| Programmable Sampling Period | Selectable 12-SCLK (short) or 24-SCLK (long) sampling - accommodates high-impedance sensors and >10-MHz SCLK operation. |
| Hardware-Controlled Extended Sampling | CSTART pin provides asynchronous, SCLK-independent sampling control - essential for precision timing in variable-speed motor feedback loops. |
| Built-in Reference & Clock | On-chip 2-V/4-V reference and oscillator eliminate external components; external reference option retains full flexibility for accuracy-critical designs. |
| 8-Entry FIFO with Configurable Trigger | FIFO threshold set to 1/4, 1/2, 3/4, or full level - enables burst-mode acquisition and reduces host CPU interrupt load in multi-sensor monitoring. |
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: Primary 12-bit ADC front-end with programmable sampling and FIFO buffering for deterministic sensor fusion. Use Value: ±1.2 LSB INL ensures accurate air-fuel ratio calculation across temperature extremes; 200-KSPS throughput supports 10-ms control loop execution. |
Use Scenario: Acquiring turbine speed, oil temperature, and solenoid feedback signals in automatic transmission systems. IC Role / Device Role / Timing Role: High-reliability ADC with CSTART-triggered sampling for synchronized capture of rotating machinery signals. Use Value: Hardware-controlled sampling eliminates jitter-induced errors in rotational speed measurement; Q-temp rating guarantees operation under hood thermal stress. |
| Electric Power Steering (EPS) | Battery Management System (BMS) |
Use Scenario: Converting torque sensor, motor phase current, and motor temperature signals for assist torque computation. IC Role / Device Role / Timing Role: Low-power SAR ADC with internal reference and autopower-down for energy-constrained EPS ECUs. Use Value: 1.7-mA typical current at 3.3 V extends system standby time; 500-kHz analog bandwidth supports fast transient response to driver input. |
Use Scenario: Monitoring cell voltages and pack temperature in 12–48 V automotive lithium-ion battery packs. IC Role / Device Role / Timing Role: Precision ADC with programmable sweep mode for sequential cell voltage scanning and FIFO-based burst reads. Use Value: Sweep auto-sequence (0–1–2–3) and 1/4-FIFO interrupt enable efficient multi-cell polling without host overhead; internal 4-V reference improves voltage measurement resolution. |
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, no internal reference, 200-KSPS max, SO-8 package | Limited to lower-precision diagnostics; lacks automotive temp range and multiplexing | Use only for non-safety-critical sub-systems where 12-bit resolution and FIFO are unnecessary. |
| TLV2548QDW | 8-channel variant in 20-pin SOIC; identical architecture, timing, and Q-temp spec; adds A4–A7 inputs | Enables expansion to 8-sensor systems without firmware change; requires PCB layout update for extra pins | Select when future sensor count growth is anticipated; same register map and command set simplify migration. |
Compared with TLV2544QD, ADS7816UB sacrifices resolution and automotive qualification for cost-sensitive diagnostics, while TLV2548QDW extends channel count without altering core timing or interface behavior - making it the only drop-in functional upgrade path within the same family.
Availability
TLV2544QD is available at Aetrix Electronics and suitable for engine control units, transmission control modules, and electric power steering systems requiring stable component supply across automotive production lifecycles.
Supply support for TLV2544QD 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 IC development and manufacturing expertise.
The TLV2544QD belongs to TI's Q-Temp automotive ADC product line, designed specifically for high-reliability signal acquisition in engine, chassis, and battery control systems operating under extreme thermal and electrical conditions.
FAQ
What is the maximum sampling rate supported by the TLV2544QD?
The TLV2544QD achieves a maximum throughput of 200 KSPS under optimal conditions - using external 20-MHz SCLK as conversion clock source and short (12-SCLK) sampling period. This rate is sustained across its full −40°C to 125°C automotive operating range and is validated with internal reference enabled. The TLV2544QD maintains this performance without external clock conditioning or additional support circuitry.
Does the TLV2544QD require an external reference voltage?
No, the TLV2544QD includes two selectable internal reference voltages (2 V or 4 V) and does not require an external reference. However, it supports optional external reference via REFP/REFM pins for applications demanding higher absolute accuracy or custom voltage scaling. When using internal reference, the TLV2544QD draws 1.7 mA at 3.3 V - optimizing power efficiency for always-on vehicle subsystems.
How does the CSTART pin function in TLV2544QD extended sampling mode?
In extended sampling mode, the CSTART pin provides hardware-controlled, SCLK-independent sampling initiation: its falling edge starts the sampling period, and its rising edge terminates sampling and triggers conversion. This allows precise, user-defined acquisition windows - critical for high-impedance sensors or variable-speed motor feedback. The TLV2544QD requires CSTART to remain high during normal SPI operation and supports minimum low-time matching t(SAMPLE) specifications per datasheet.
What are the FIFO capabilities of the TLV2544QD?
The TLV2544QD integrates an 8-word × 12-bit FIFO with four programmable interrupt thresholds (1/4, 1/2, 3/4, or full). It supports sweep, repeat, and repeat-sweep conversion modes - enabling burst acquisition across its 4 analog channels. FIFO contents are read via dedicated command (Eh), delivering 12-bit results MSB-first with 4 don't-care bits. The TLV2544QD retains FIFO data until explicitly read, preventing loss during host latency spikes.
Is the TLV2544QD pin-compatible with other devices in the TLV254x family?
The TLV2544QD uses a 16-pin SOIC (D) package with defined pin mapping for A0–A3, CS, SCLK, SDI, SDO, EOC/(INT), CSTART, PWDN, REFP, REFM, VCC, and GND. It is not pin-compatible with the 20-pin TLV2548QDW (which adds A4–A7) or the 20-pin TLV2548MFK. However, its command set, register structure, timing, and interface behavior are fully aligned with the TLV2548QDW - enabling seamless firmware reuse when migrating to higher channel count.
TLV2544QD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 4
- Input Type:
- Single Ended
- Data Interface:
- SPI, DSP
- 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:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 16-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLV2544QD FAQ
1.How can I place an order for TLV2544QD through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2544QD 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 TLV2544QD reliable?
The price and inventory of TLV2544QD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2544QD is usually 5 days.
3.What payment methods are accepted for TLV2544QD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2544QD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2544QD?
TLV2544QD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2544QD 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 TLV2544QD?
For technical support, including TLV2544QD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2544QD requirements.
6.How does Aetrix verify that TLV2544QD is sourced from the original manufacturer or authorized distributors?
All TLV2544QD 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 TLV2544QD meets industry standards.
7.What is the process for return or replacement of TLV2544QD?
All TLV2544QD units undergo pre-shipment inspection (PSI). If there is an issue with TLV2544QD, 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 TLV2544QD part is unused and in its original packaging.
Return procedure for TLV2544QD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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