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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Texas Instruments TLV2548QDWR

Name: TLV2548QDWR
Brand: Texas Instruments
SKU: TLV2548QDWR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLV2548QDWR

Manufacturer:: Texas Instruments

Category:: Analog to Digital Converters (ADC)

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: TLV2548QDWR.pdf

Description:: IC ADC 12BIT SAR 20SOIC

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Product details

Overview

TLV2548QDWR 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/integral nonlinearity 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 TLV2548QDWR datasheet, TLV2548QDWR pinout, TLV2548QDWR application, or TLV2548QDWR equivalent, this page provides verified technical context, automotive-qualified timing behavior, FIFO-triggered sampling modes, hardware-controlled CSTART sampling, and validated alternative options for high-reliability ADC selection.

Technical Context

The TLV2548QDWR 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 is configurable to internal OSC, SCLK, SCLK/2, or SCLK/4 - enabling conversion times as low as 3.5 µs (with 20-MHz SCLK) or 4.6 µs (with 3-MHz internal OSC).

It supports four conversion modes (one-shot, repeat, sweep, repeat-sweep), programmable FIFO trigger levels (1/4 to full), and dual EOC/INT functionality. Sampling is controlled either synchronously via CS/FS edges (normal mode) or asynchronously via CSTART pin - allowing precise timing control independent of SCLK for high-impedance sources.

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 - achieved using external 20-MHz SCLK with SCLK/1 conversion clock source 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 control.
SNR	65 dB at f_IN = 12 kHz - sufficient for 10.5 effective bits in audio and motor phase current sensing.
SFDR	75 dB at f_IN = 12 kHz - suppresses harmonic distortion critical in multi-channel synchronized acquisition.
Supply Range	3.0 V to 5.5 V - enables direct interfacing with 3.3-V microcontrollers and compatibility with 5-V legacy systems.
Power Consumption	1.7 mA at 3.3 V (internal ref), 1 µA in software power-down - reduces thermal load in sealed automotive modules.
Analog BW	500 kHz - supports anti-aliasing filter design for signals up to ~150 kHz without external amplification.

Pinout & Package

TLV2548QDWR is housed in a 20-pin SOIC (DW) package with 0.300-inch body width, RoHS-compliant matte tin lead finish, and rated for −40°C to 125°C operation per AEC-Q100 Grade 2.

Pin/Terminal	Circuit Role	Design Meaning
1 (SDO)	Serial Data Output	3-state MSB-first output; driven after CS↓ or FS↓; supports SPI (rising-edge latching) and DSP (falling-edge latching) protocols.
2 (SDI)	Serial Data Input	Accepts 16-bit command + configuration data; first 4 bits define channel select, CFR read/write, or test voltage selection.
3 (SCLK)	Serial Clock Input	Up to 20 MHz; CPOL = 0 (idles low); serves as conversion clock source when configured (SCLK/1, /2, or /4).
4 (EOC/(INT))	End-of-Conversion / Interrupt	Configurable as EOC (mode 00 only) or INT (all other modes); active-low interrupt indicates FIFO threshold reached or conversion complete.
5 (VCC)	Positive Supply	3.0–5.5 V analog/digital supply; decoupling required near pin with 0.1 µF ceramic + 10 µF bulk capacitor.
6–9 (A0–A3)	Analog Input Channels	Four of eight single-ended analog inputs; multiplexed internally; input impedance ≤1 kΩ recommended for full accuracy.
10 (CSTART)	Asynchronous Sampling Control	Falling edge initiates sampling; rising edge terminates sampling and starts conversion - enables user-defined sample aperture independent of SCLK.
11 (GND)	Analog/Digital Ground	Common return for analog and digital sections; requires low-inductance connection to system ground plane.
12 (PWDN)	Power-Down Control	Logic low disables analog and reference circuits; device resumes operation on next active CS, FS, or CSTART edge.
13 (FS)	DSP Frame Sync	Active-low frame start indicator for TMS320 DSP interface; resets internal counter and enables SDI independent of CS state.
14 (REFM)	Reference Return	Ground reference for internal 2-V/4-V reference or negative terminal of external reference; connect 0.1 µF + 10 µF capacitors to REFP.
15 (REFP)	Reference Input	Positive reference terminal; accepts internal 2-V/4-V or external reference up to VCC; defines full-scale range (0 V to V_REF).
16 (CS)	Chip Select	Active-low enable; falling edge resets command counter and enables SDI; must idle high between cycles for SPI compliance.
17–19 (A4–A6)	Analog Input Channels	Three additional single-ended analog inputs; accessible only in TLV2548 family (not TLV2544); support 8-channel sweep sequences.
20 (A7)	Analog Input Channel	Eighth single-ended analog input; enables full 8-channel auto-sweep in sweep/repeat-sweep modes.

Key Features

Feature	Design Value
Integrated 8× FIFO	Reduces host processor interrupt overhead in multi-channel acquisition; supports programmable trigger thresholds (1/4 to full) for deterministic data flow control.
Hardware CSTART Sampling	Enables precise, asynchronous sampling aperture definition - essential for high-impedance sensors (e.g., thermistors, RTDs) where SCLK-based timing is insufficient.
Programmable Conversion Clock	Four clock sources (OSC, SCLK, SCLK/2, SCLK/4) allow optimization of speed vs. noise: SCLK/4 improves SNR by reducing switching noise coupling into analog section.
Automotive Q-Temp Qualification	Qualified per AEC-Q100 Grade 2 (−40°C to 125°C), with configuration control and qualification documentation - suitable for under-hood engine management and transmission control modules.
Dual Reference Options	Internal 2-V or 4-V reference eliminates external components; external reference support enables ratiometric measurements with precision voltage references (e.g., REF5025).
Four Conversion Modes	One-shot, repeat, sweep, and repeat-sweep modes provide flexible sequencing - sweep mode automates 8-channel acquisition without host intervention per channel.

Applications

Engine Control Unit (ECU)	Electric Power Steering (EPS)
Use Scenario: Real-time acquisition of throttle position, manifold absolute pressure (MAP), and coolant temperature signals. IC Role / Device Role / Timing Role: Primary ADC for safety-critical analog sensor inputs; operates in sweep mode to cycle through 8 channels with <1 µs inter-channel delay. Use Value: Built-in FIFO and CSTART ensure deterministic sampling timing across all channels, meeting ISO 26262 ASIL-B timing constraints.	Use Scenario: Simultaneous sampling of motor phase currents and torque sensor outputs in brushless DC motor control loop. IC Role / Device Role / Timing Role: High-speed SAR ADC with 200-KSPS throughput; uses extended sampling via CSTART to accommodate >1-kΩ current-sense resistor networks. Use Value: ±1.2 LSB INL guarantees accurate current reconstruction for field-oriented control (FOC), minimizing torque ripple.
Advanced Driver Assistance Systems (ADAS)	Onboard Charger Monitoring
Use Scenario: Acquisition of radar front-end bias voltages and temperature compensation signals in 77-GHz radar modules. IC Role / Device Role / Timing Role: Precision ADC with 65 dB SNR and 75 dB SFDR; configured with internal 4-V reference for stable full-scale range under voltage transients. Use Value: Low power-down current (1 µA) enables always-on monitoring during vehicle sleep mode without draining 12-V battery.	Use Scenario: Voltage and current sensing across AC/DC and DC/DC stages in EV onboard chargers operating at 650 V DC bus. IC Role / Device Role / Timing Role: Isolated analog front-end ADC; interfaces to isolated SPI isolators (e.g., Si866x) via 20-MHz SCLK for fast control loop response. Use Value: SPI/DSP compatibility allows seamless integration with TI C2000™ real-time MCUs, reducing firmware development time for OBC certification.

Engine Control Unit (ECU)

Electric Power Steering (EPS)

Use Scenario: Real-time acquisition of throttle position, manifold absolute pressure (MAP), and coolant temperature signals.

IC Role / Device Role / Timing Role: Primary ADC for safety-critical analog sensor inputs; operates in sweep mode to cycle through 8 channels with <1 µs inter-channel delay.

Use Value: Built-in FIFO and CSTART ensure deterministic sampling timing across all channels, meeting ISO 26262 ASIL-B timing constraints.

Use Scenario: Simultaneous sampling of motor phase currents and torque sensor outputs in brushless DC motor control loop.

IC Role / Device Role / Timing Role: High-speed SAR ADC with 200-KSPS throughput; uses extended sampling via CSTART to accommodate >1-kΩ current-sense resistor networks.

Use Value: ±1.2 LSB INL guarantees accurate current reconstruction for field-oriented control (FOC), minimizing torque ripple.

Advanced Driver Assistance Systems (ADAS)

Onboard Charger Monitoring

Use Scenario: Acquisition of radar front-end bias voltages and temperature compensation signals in 77-GHz radar modules.

IC Role / Device Role / Timing Role: Precision ADC with 65 dB SNR and 75 dB SFDR; configured with internal 4-V reference for stable full-scale range under voltage transients.

Use Value: Low power-down current (1 µA) enables always-on monitoring during vehicle sleep mode without draining 12-V battery.

Use Scenario: Voltage and current sensing across AC/DC and DC/DC stages in EV onboard chargers operating at 650 V DC bus.

IC Role / Device Role / Timing Role: Isolated analog front-end ADC; interfaces to isolated SPI isolators (e.g., Si866x) via 20-MHz SCLK for fast control loop response.

Use Value: SPI/DSP compatibility allows seamless integration with TI C2000™ real-time MCUs, reducing firmware development time for OBC certification.

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
ADS7953QDBTR	12-bit, 1-MSPS, 16-channel, SPI interface; no internal reference; requires external REF; higher power (3.5 mA @ 3.3 V).	Higher throughput and channel count, but lacks built-in FIFO and CSTART; better suited for high-speed data loggers than deterministic ECU sampling.	Select ADS7953QDBTR when >200-KSPS or >8 channels are required, and external reference design is acceptable.
MAX11131AUT+T	12-bit, 500-KSPS, 8-channel, SPI interface; internal 2.048-V reference; no CSTART pin; FIFO depth = 16 words.	Higher speed and deeper FIFO, but not AEC-Q100 qualified; rated only to −40°C to +125°C without automotive process controls.	Select MAX11131AUT+T for non-automotive industrial applications requiring faster sampling and deeper buffering.

Compared with TLV2548QDWR, ADS7953QDBTR offers higher speed and channel count but requires external reference and lacks CSTART timing control, while MAX11131AUT+T provides deeper FIFO and higher throughput but lacks AEC-Q100 qualification and hardware sampling control - making TLV2548QDWR the optimal choice for deterministic, automotive-qualified 8-channel acquisition.

Availability

TLV2548QDWR is available at Aetrix Electronics and suitable for engine control units, electric power steering systems, and ADAS sensor modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV2548QDWR 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 automotive electronics, with decades of automotive qualification expertise and broad portfolio of AEC-Q100 devices.

The TLV2548QDWR belongs to TI's Q-Temp automotive ADC family, designed specifically for high-reliability engine management, transmission control, and chassis electronics where precision, timing determinism, and extended temperature operation are mandatory.

FAQ

What is the maximum sampling rate achievable with TLV2548QDWR?

The TLV2548QDWR achieves a maximum throughput of 200 KSPS when using a 20-MHz SCLK with conversion clock set to SCLK/1 and short sampling (12 SCLKs). This yields a total conversion cycle time of 30 SCLKs (≈1.5 µs), confirmed in the SGLS119F datasheet Figure 7 and timing table. The device maintains ±1.2 LSB linearity and 65 dB SNR at this rate within its −40°C to 125°C operating range.

Does TLV2548QDWR support external reference voltage?

Yes, TLV2548QDWR supports external reference voltage applied between REFP and REFM pins. Configuration bit D11 in the CFR register selects external reference mode. When enabled, the full-scale range becomes 0 V to (V_REFP − V_REFM), and the device requires 0.1 µF + 10 µF decoupling capacitors between REFP and REFM as specified in the Terminal Functions section of the datasheet.

How does the CSTART pin function in TLV2548QDWR?

The CSTART pin on TLV2548QDWR provides hardware-controlled asynchronous sampling: a falling edge initiates sampling, and a rising edge terminates sampling and starts conversion. This allows precise, SCLK-independent aperture control - critical for high-impedance sources. Minimum CSTART low time must meet t_SAMPLE requirements, and it functions only when internal reference is selected in repeat/sweep modes per datasheet Section 8.

What are the supported conversion modes in TLV2548QDWR?

TLV2548QDWR supports four conversion modes defined by CFR bits D6–D5: one-shot (00), repeat (01), sweep (10), and repeat-sweep (11). Sweep mode automatically cycles through up to eight analog inputs in programmable sequences (e.g., 0–1–2–3–4–5–6–7), storing results in the 8-word FIFO. All modes except one-shot generate INT (not EOC) upon FIFO threshold reach.

Is TLV2548QDWR qualified for automotive applications?

Yes, TLV2548QDWR is explicitly characterized and qualified for automotive use: it is labeled "Q-Temp Automotive" in the datasheet, rated for −40°C to 125°C, and meets AEC-Q100 Grade 2 requirements. It includes configuration control, qualification documentation, and high-reliability process enhancements - making it suitable for engine control, transmission, and chassis systems per the device description on page 1.

TLV2548QDWR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

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:: -

TLV2548QDWR FAQ

1.How can I place an order for TLV2548QDWR through Aetrix?

Please submit a Request for Quotation (RFQ) for TLV2548QDWR 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 TLV2548QDWR reliable?

The price and inventory of TLV2548QDWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2548QDWR is usually 5 days.

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TLV2548QDWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLV2548QDWR 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 TLV2548QDWR?

For technical support, including TLV2548QDWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2548QDWR requirements.

6.How does Aetrix verify that TLV2548QDWR is sourced from the original manufacturer or authorized distributors?

All TLV2548QDWR 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 TLV2548QDWR meets industry standards.

7.What is the process for return or replacement of TLV2548QDWR?

All TLV2548QDWR units undergo pre-shipment inspection (PSI). If there is an issue with TLV2548QDWR, 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 TLV2548QDWR part is unused and in its original packaging.

Return procedure for TLV2548QDWR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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