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Texas Instruments TLV2544QDG4
- Part No.:
- TLV2544QDG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLV2544QDG4.pdf
- Description:
- IC ADC 12BIT SAR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,575
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Product details
Overview
TLV2544QDG4 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 over −40°C to 125°C. It is used in engine control units for real-time sensor signal digitization.
For engineers reviewing the TLV2544QDG4 datasheet, TLV2544QDG4 pinout, TLV2544QDG4 application, or TLV2544QDG4 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 FIFO-triggered interrupt capability for deterministic data acquisition.
Technical Context
The TLV2544QDG4 implements a charge redistribution SAR architecture with an integrated analog multiplexer selecting among four single-ended analog inputs (A0–A3) and three internal test voltages. Sampling is initiated either by CS/FS edge (normal mode) or asynchronously via the CSTART pin (extended mode), enabling precise control over acquisition time independent of SCLK frequency.
Conversion clock sources include internal OSC or external SCLK divided by 1/2/4; configuration register (CFR) bits D(8−7) select the source, while D9 selects short (12 SCLK) or long (24 SCLK) sampling. The device supports four conversion modes-One Shot (00), Repeat (01), Sweep (10), and Repeat Sweep (11)-with FIFO trigger levels configurable via CFR D(1,0).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 4096 discrete output codes with monotonic transfer function across full temperature range. |
| Max Throughput | 200 KSPS - achievable using 20-MHz SCLK with SCLK/1 conversion clock and short sampling (12 SCLKs). |
| DNL/INL | ±1.2 LSB (−40°C to 125°C) - ensures no missing codes and accurate linearity for closed-loop feedback systems. |
| SNDR | 65 dB at fi = 12 kHz - supports high-fidelity digitization of audio-band and motor control signals. |
| Supply Range | 3.0 V to 5.5 V - enables direct interface with 3.3-V and 5-V microcontrollers without level-shifting. |
| Analog BW | 500 kHz - sufficient for anti-aliasing filter design targeting ≤200-KSPS Nyquist bandwidth. |
| Power (Int Ref) | 1.7 mA @ 3.3 V - enables low-power operation in battery-backed automotive subsystems. |
Pinout & Package
TLV2544QDG4 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 enable for serial interface; resets internal counter and enables SDI/SDO on falling edge (must occur with SCLK low). |
| SCLK | Serial Clock Input | Accepts up to 20-MHz clock; serves as interface clock and optional conversion clock source (via CFR D(8−7)). |
| SDI | Serial Data Input | Receives 16-bit command + configuration data (MSB first); decodes first 4 bits as command (e.g., channel select, CFR write). |
| SDO | Serial Data Output | 3-state output presenting 12-bit conversion result (MSB first) after CS/FS trigger; high-impedance when CS high. |
| EOC/(INT) | End-of-Conversion / Interrupt Output | Configurable as EOC (mode 00 only) or INT (all other modes); active-low signal indicates data ready for read. |
| CSTART | Asynchronous Sampling Control | Falling edge initiates sampling; rising edge ends sampling and starts conversion - enables precise timing control independent of SCLK. |
| A0–A3 | Analog Input Channels | Four single-ended inputs; multiplexed internally; max source impedance 1 kΩ unless extended sampling is used. |
| REFP / REFM | Reference Voltage Terminals | Support external reference (differential input) or decouple internal 2-V/4-V reference; require 10 µF + 0.1 µF bypass capacitors. |
| PWDN | Power-Down Control | Logic-low disables analog and reference circuits; typical 1 µA standby current with external reference. |
| VCC / GND | Supply and Ground | Single 3–5.5-V supply; all voltage measurements referenced to GND; requires local 0.1-µF ceramic bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Q-Temp Automotive Qualification | Qualified per AEC-Q100 Grade 1 (−40°C to 125°C) with configuration control and production traceability for safety-critical ECUs. |
| Programmable Sampling Period | Short (12 SCLK) or long (24 SCLK) sampling selectable via CFR D9 - accommodates high-speed SCLK or high-Z sensors. |
| Hardware-Controlled Extended Sampling | CSTART pin enables user-defined sampling duration - critical for accurate acquisition from thermistors or RTDs with >1-kΩ source impedance. |
| Built-In Reference & Clock | Internal 2-V or 4-V reference (CFR D11/D10) and selectable conversion clock (OSC/SCLK/SCLK/2/SCLK/4) eliminate external components. |
| 8-Entry FIFO with Configurable Trigger | FIFO threshold set to 1/4, 1/2, 3/4, or full (CFR D(1,0)) - enables burst-mode acquisition with deterministic interrupt timing. |
Applications
| Engine Control Unit (ECU) | Transmission Control Module (TCM) |
|---|---|
Use Scenario: Digitizing throttle position, coolant temperature, and manifold absolute pressure sensor outputs in real time. IC Role / Device Role / Timing Role: Primary ADC for analog sensor front-end; synchronized to engine crankshaft position timer via CSTART for phase-aligned sampling. Use Value: ±1.2 LSB INL ensures accurate air-fuel ratio calculation; FIFO-triggered INT enables deterministic DMA transfers to MCU without CPU polling. |
Use Scenario: Monitoring solenoid valve feedback, oil temperature, and turbine speed signals during gear shift events. IC Role / Device Role / Timing Role: High-reliability ADC interfacing with TMS320C2000 DSP via FS-synchronized SPI; uses repeat sweep mode across 4 channels. Use Value: 200-KSPS throughput captures transient valve dynamics; internal 4-V reference improves SNDR margin against supply ripple in 12-V automotive rail. |
| Electric Power Steering (EPS) | Brake-by-Wire Sensor Interface |
Use Scenario: Acquiring torque sensor, motor current, and steering angle signals for closed-loop assist control. IC Role / Device Role / Timing Role: Dual-role ADC: normal sampling for slow-varying temperature, extended sampling (CSTART) for fast torque transients. Use Value: Programmable sampling period prevents aliasing on high-slew-rate torque steps; 500-kHz analog BW supports >100-kHz signal fidelity. |
Use Scenario: Redundant digitization of brake pedal position and master cylinder pressure for functional safety compliance. IC Role / Device Role / Timing Role: Safety-redundant ADC with independent power domains; uses One Shot mode with external reference for cross-checking. Use Value: Q-temp qualification and built-in self-test voltages (REFP/REFM/(REFP+REFM)/2) support ISO 26262 ASIL-B diagnostic coverage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit automotive ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953QDBTRQ1 | 12-bit, 1-MSPS SAR ADC with 16-channel MUX; requires external reference and clock; no built-in FIFO. | Higher throughput but lacks integrated FIFO and CSTART; needs additional timing logic for deterministic sampling. | Choose when >200-KSPS is required and system-level FIFO buffering is already implemented. |
| MAX11131ATJ+T | 12-bit, 500-KSPS SAR ADC; internal reference; SPI-only (no FS/CSTART); 8-channel MUX; no automotive qualification. | Lacks Q-temp rating, CSTART, and DSP frame sync - unsuitable for ASIL-B systems without external qualification evidence. | Consider only for non-automotive industrial applications where cost and speed outweigh qualification requirements. |
Compared with TLV2544QDG4, ADS7953QDBTRQ1 offers higher speed but increases BOM count and timing complexity, while MAX11131ATJ+T sacrifices automotive reliability and deterministic sampling control - making TLV2544QDG4 the optimal choice for safety-aware, FIFO-driven automotive sensing.
Availability
TLV2544QDG4 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 TLV2544QDG4 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 TLV2544QDG4 belongs to TI's Q-Temp automotive ADC family, designed specifically for high-reliability, low-power sensor signal acquisition in engine, chassis, and safety-critical electronic control units.
FAQ
What is the maximum sampling rate supported by the TLV2544QDG4?
The TLV2544QDG4 achieves a maximum throughput of 200 KSPS. This is attained using a 20-MHz SCLK with conversion clock set to SCLK/1 and short sampling (12 SCLKs), resulting in a total cycle time of 30 SCLKs (≈1.5 µs). At lower SCLK frequencies or with long sampling, throughput decreases proportionally - e.g., 10-MHz SCLK yields ~100 KSPS.
Does the TLV2544QDG4 support both internal and external voltage references?
Yes, the TLV2544QDG4 supports both internal and external references. CFR bit D11 selects between internal (D11 = 1) and external (D11 = 0) reference modes. When internal reference is enabled, CFR bit D10 further selects 2 V or 4 V output. External reference is applied differentially between REFP and REFM pins, with recommended 10-µF and 0.1-µF bypass capacitors.
How does the CSTART pin function in the TLV2544QDG4?
The CSTART pin provides asynchronous, hardware-controlled sampling initiation. Its falling edge starts the sampling period; its rising edge ends sampling and triggers conversion. This allows precise, SCLK-independent control of acquisition time - essential for high-impedance sensors like thermistors. CSTART must be held high during normal SPI operation and is ignored unless CS is active.
What are the FIFO capabilities of the TLV2544QDG4?
The TLV2544QDG4 integrates an 8-word × 12-bit FIFO. FIFO fill level triggers an interrupt (INT) based on CFR D(1,0): 1/4 (1 word), 1/2 (3 words), 3/4 (5 words), or full (7 words). In Sweep or Repeat Sweep modes, FIFO stores sequential conversions; a FIFO read command retrieves data MSB-first and clears the FIFO upon completion.
Is the TLV2544QDG4 pin-compatible with other devices in the TLV254x family?
No, the TLV2544QDG4 is not pin-compatible with TLV2548 variants. While both share the same 16-pin SOIC (D) package footprint, the TLV2544QDG4 has only four analog inputs (A0–A3) and omits A4–A7, FS, and several other pins present on the 20-pin TLV2548QDW. Pin mapping and terminal functions differ - refer to the TLV2544Q DG4-specific pin diagram in the datasheet.
TLV2544QDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
TLV2544QDG4 FAQ
1.How can I place an order for TLV2544QDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2544QDG4 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 TLV2544QDG4 reliable?
The price and inventory of TLV2544QDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2544QDG4 is usually 5 days.
3.What payment methods are accepted for TLV2544QDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2544QDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2544QDG4?
TLV2544QDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2544QDG4 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 TLV2544QDG4?
For technical support, including TLV2544QDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2544QDG4 requirements.
6.How does Aetrix verify that TLV2544QDG4 is sourced from the original manufacturer or authorized distributors?
All TLV2544QDG4 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 TLV2544QDG4 meets industry standards.
7.What is the process for return or replacement of TLV2544QDG4?
All TLV2544QDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLV2544QDG4, 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 TLV2544QDG4 part is unused and in its original packaging.
Return procedure for TLV2544QDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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