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Texas Instruments TLV2544QDR
- Part No.:
- TLV2544QDR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLV2544QDR.pdf
- Description:
- IC ADC 12BIT SAR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,565
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Product details
Overview
TLV2544QDR from Texas Instruments is a 12-bit, 200-kSPS automotive-grade SAR analog-to-digital converter with built-in reference, internal conversion clock, and 8-word 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 over −40°C to 125°C - used in engine control unit (ECU) sensor signal digitization.
For engineers reviewing the TLV2544QDR datasheet, TLV2544QDR pinout, TLV2544QDR application, or TLV2544QDR equivalent, key selection considerations include its 4-channel analog multiplexer, programmable sampling period (12/24 SCLK), EOC/INT dual-function pin, hardware CSTART-triggered extended sampling, and Q-temp qualification for under-hood automotive systems.
Technical Context
The TLV2544QDR implements a charge redistribution successive-approximation ADC architecture with break-before-make analog multiplexer for 4-channel input selection. Its internal 4-V or 2-V reference can be disabled in favor of external reference, and conversion clock may be sourced from internal OSC, SCLK, SCLK/2, or SCLK/4.
It supports four conversion modes - one-shot, repeat, sweep, and repeat-sweep - with FIFO trigger levels configurable at full/3/4/1/2/1/4 depth. Sampling is initiated via CS (SPI), FS (DSP), or asynchronous CSTART, enabling precise timing control for high-impedance sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1 LSB = VREF/4096 quantization step for precision sensor measurement. |
| Max Throughput | 200 kSPS - supports real-time sampling of fast transients such as knock detection or camshaft position signals. |
| DNL/INL | ±1.2 LSB (−40°C to 125°C) - ensures monotonicity and linearity compliance in closed-loop feedback control loops. |
| SNDR | 65 dB at fi = 12 kHz - enables accurate digitization of audio-band and low-MHz sensor outputs without aliasing. |
| Supply Range | 3.0 V to 5.5 V - compatible with both 3.3-V microcontrollers and legacy 5-V automotive power domains. |
| Analog BW | 500 kHz - supports anti-alias filtering for signals up to Nyquist (100 kHz at 200 kSPS). |
| Power Consumption | 1.7 mA at 3.3 V (internal ref), 1 µA in software/hardware power-down - reduces thermal load in sealed ECU enclosures. |
Pinout & Package
TLV2544QDR is housed in a 16-pin SOIC (D package), 7.5 mm × 10.3 mm body, with standard JEDEC MS-012AC footprint and 1.27 mm pitch. Pin 1 marked by dot or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low SPI frame delimiter; resets command counter and enables SDI/SDO on falling edge (must occur with SCLK low). |
| SCLK | Serial Clock Input | Up to 20 MHz; controls data latching (rising edge for SPI, falling edge when FS active); selectable as conversion clock source. |
| SDI | Serial Data Input | MSB-first 16-bit command/data stream; bits D15–D12 decode channel select (0–3), power-down, or CFR write. |
| SDO | Serial Data Output | 3-state output; presents 12-bit conversion result + 4 don't-care bits; floats after 16th bit. |
| EOC/(INT) | End-of-Conversion / Interrupt Output | Configurable as EOC (mode 00 only) or INT (all other modes); asserts low when FIFO threshold met or conversion complete. |
| CSTART | Asynchronous Sampling Control | Falling edge starts sampling; rising edge ends sampling and initiates conversion - enables user-defined sample time independent of SCLK. |
| PWDN | Power-Down Control | Logic low disables analog and reference circuits; resumes operation on next CS/FS/CSTART activation. |
| A0–A3 | Analog Input Channels | Four single-ended inputs; internally multiplexed; max 1 kΩ source impedance recommended unless using CSTART or long sampling. |
| REFP / REFM | Reference Voltage Terminals | Accept external reference (e.g., REF3025) or decouple internal 2-V/4-V reference; require 10 µF + 0.1 µF bypass capacitors. |
| VCC / GND | Power Supply | Single 3–5.5 V rail; GND serves as analog/digital reference plane - requires solid ground plane for SNDR performance. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Auto-Channel Sweep | Supports 4-channel sequences (0–1–2–3, 0–0–1–1, etc.) in sweep/repeat-sweep mode - eliminates host CPU polling overhead in multi-sensor monitoring. |
| Hardware-Controlled Extended Sampling | CSTART pin enables user-defined sampling duration - critical for high-Z thermistor or RTD interfaces where 12/24-SCLK sampling is insufficient. |
| On-Chip 8×12-Bit FIFO | Reduces host interrupt frequency and bus contention; FIFO trigger level configurable per application latency requirements (1/4 to full fill). |
| Q-Temp Automotive Qualification | Tested and qualified per AEC-Q100 Grade 1 (−40°C to 125°C), with configuration control and production traceability - meets OEM ECU reliability mandates. |
| Flexible Reference Architecture | Internal 2-V or 4-V reference selectable via CFR bit D10; external reference option preserves accuracy when VCC varies or noise coupling exists. |
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 4-channel MUX and FIFO buffers burst samples during combustion event windows. Use Value: ±1.2 LSB INL ensures closed-loop fuel injection timing accuracy; CSTART extends sampling for slow-response NTC thermistors. |
Use Scenario: Monitoring turbine speed, oil temperature, and solenoid current feedback in automatic transmission systems. IC Role / Device Role / Timing Role: SPI-interfaced ADC providing synchronized multi-channel acquisition for torque converter clutch control algorithms. Use Value: 200-kSPS throughput captures transient slip events; Q-temp rating guarantees operation at gearbox housing temperatures up to 125°C. |
| Brake-by-Wire Actuator | Electric Power Steering (EPS) |
|
Use Scenario: Converting brake pedal travel, master cylinder pressure, and wheel speed signals for fail-operational redundancy checks. IC Role / Device Role / Timing Role: Safety-critical ADC with programmable sweep mode and FIFO-interrupt handshaking to MCU safety core. Use Value: Internal reference + external decoupling ensures stable 12-bit resolution despite battery voltage sag; power-down mode cuts leakage during standby. |
Use Scenario: Sampling torque sensor, motor phase currents, and steering angle for assist torque calculation and fault detection. IC Role / Device Role / Timing Role: Low-power ADC interfacing directly to 3.3-V EPS MCU via SPI, with CSTART synchronizing to motor commutation timing. Use Value: 1.7 mA typical current at 3.3 V minimizes heat generation near motor driver ICs; 500 kHz analog bandwidth supports high-frequency current ripple analysis. |
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, SO-8 package | Limited to non-critical diagnostics; lacks sweep/FIFO for multi-sensor systems | Select only for cost-sensitive, low-accuracy subsystems where 12-bit linearity is not required. |
| TLV2548QDW | 8-channel variant in 20-pin SOIC; identical architecture, timing, and Q-temp spec | Requires PCB redesign for extra pins; supports broader sensor sets without external MUX | Choose when system scales beyond 4 analog inputs and board space allows larger footprint. |
Compared with TLV2544QDR, ADS7816UB sacrifices resolution and integration for lower cost and size, while TLV2548QDW extends channel count without altering timing or power behavior - making TLV2544QDR optimal for fixed 4-input, space-constrained automotive modules.
Availability
TLV2544QDR is available at Aetrix Electronics and suitable for engine control units, transmission control modules, and brake-by-wire actuators requiring stable component supply across automotive production lifecycles.
Supply support for TLV2544QDR 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 TLV2544QDR belongs to TI's Q-Temp automotive ADC family, designed specifically for under-hood signal acquisition in harsh environments - emphasizing reliability, wide temperature operation, and seamless microcontroller interface compatibility.
FAQ
What is the maximum sampling rate supported by the TLV2544QDR?
The TLV2544QDR achieves a maximum throughput of 200 kSPS under specified conditions - achieved using external SCLK at 20 MHz with conversion clock set to SCLK/4 and short sampling (12 SCLKs). At this rate, total conversion time is 30 SCLK cycles (≈1.5 µs), consistent with its 3.5-µs typical conversion specification.
Does the TLV2544QDR require an external reference voltage?
No, the TLV2544QDR includes an internal 2-V or 4-V reference selectable via CFR bit D10. However, an external reference may be used by setting CFR D11 = 0 and connecting it between REFP and REFM - improving accuracy when VCC exhibits noise or drift, or when precise scaling relative to a system-level reference is needed.
How does the CSTART pin function in the TLV2544QDR?
The CSTART pin provides hardware-controlled extended sampling: its falling edge initiates sampling, and its rising edge terminates sampling and starts conversion - independent of SCLK timing. This is essential for high-impedance sensors (e.g., >1 kΩ) where fixed 12/24-SCLK sampling is inadequate, and enables synchronization to external events like ignition pulses.
Can the TLV2544QDR operate in a true SPI-compatible mode?
Yes, the TLV2544QDR supports standard SPI operation with CPOL = 0 (SCLK idle low) and CPHA = 0 (data sampled on rising edge). CS must fall with SCLK low; SDI data is latched on rising SCLK edges; SDO outputs MSB-first with 12-bit result + 4 don't-care bits. No frame sync (FS) signal is required for basic SPI use.
What automotive qualification standards apply to the TLV2544QDR?
The TLV2544QDR is Q-Temp qualified per AEC-Q100 Grade 1, rated for continuous operation from −40°C to +125°C ambient. It undergoes rigorous stress testing including HTOL, TC, UHAST, and ESD (HBM ≥2 kV), with full configuration control, lot traceability, and production part approval process (PPAP) documentation available for OEM release.
TLV2544QDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -
TLV2544QDR FAQ
1.How can I place an order for TLV2544QDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2544QDR 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 TLV2544QDR reliable?
The price and inventory of TLV2544QDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2544QDR is usually 5 days.
3.What payment methods are accepted for TLV2544QDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2544QDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2544QDR?
TLV2544QDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2544QDR 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 TLV2544QDR?
For technical support, including TLV2544QDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2544QDR requirements.
6.How does Aetrix verify that TLV2544QDR is sourced from the original manufacturer or authorized distributors?
All TLV2544QDR 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 TLV2544QDR meets industry standards.
7.What is the process for return or replacement of TLV2544QDR?
All TLV2544QDR units undergo pre-shipment inspection (PSI). If there is an issue with TLV2544QDR, 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 TLV2544QDR part is unused and in its original packaging.
Return procedure for TLV2544QDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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