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Texas Instruments TLV2548QDWG4
- Part No.:
- TLV2548QDWG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TLV2548QDWG4.pdf
- Description:
- IC ADC 12BIT SAR 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,525
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Product details
Overview
TLV2548QDWG4 from Texas Instruments is a 12-bit, 200-kSPS automotive-grade SAR analog-to-digital converter with integrated reference, conversion clock, and 8-deep FIFO. It supports SPI/DSP serial interfaces up to 20 MHz, operates from 3 V to 5.5 V, and delivers ±1.2 LSB differential/integral nonlinearity over −40°C to 125°C - used in engine control units for high-accuracy sensor signal digitization.
For engineers reviewing the TLV2548QDWG4 datasheet, TLV2548QDWG4 pinout, TLV2548QDWG4 application, or TLV2548QDWG4 equivalent, key selection considerations include its Q-temp automotive qualification, programmable auto-channel sweep, hardware/software power-down modes (1 µA typ), extended sampling via CSTART pin, and dual internal reference options (2 V or 4 V).
Technical Context
The TLV2548QDWG4 implements a charge redistribution SAR architecture with break-before-make analog multiplexer for 8-channel input selection. Its configurable conversion clock source (internal OSC, SCLK, SCLK/2, or SCLK/4) enables conversion times as low as 3.5 µs at 20 MHz SCLK.
It supports four conversion modes - one-shot, repeat, sweep, and repeat-sweep - with FIFO-triggered interrupt generation and programmable sampling period (12 or 24 SCLK cycles). The EOC/INT pin is software-configurable, and CSTART provides asynchronous sampling control independent of SCLK timing.
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 with SCLK/4 clock source configuration |
| DNL/INL | ±1.2 LSB over −40°C to 125°C - ensures monotonicity and linearity in closed-loop feedback systems |
| SNR + Distortion | 65 dB at 12 kHz input - suitable for precision motor current sensing and battery voltage monitoring |
| Spurious Free DR | 75 dB at 12 kHz - minimizes harmonic interference in multi-sensor automotive subsystems |
| Supply Range | 3 V to 5.5 V single supply - compatible with both 3.3-V and 5-V microcontroller domains |
| 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
TLV2548QDWG4 is housed in a 20-pin SOIC (DW) package with 0.300-inch body width and standard JEDEC MS-013AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDO | Serial data output | 3-state MSB-first output; presents conversion result or CFR register content after CS↓ or FS↓ |
| SDI | Serial data input | Accepts 16-bit command/data frames (4-bit CMR + 12-bit payload) for channel select, configuration, or power control |
| SCLK | Serial clock input | Supports CPOL = 0 (idle low); serves as conversion clock source when configured for SCLK/4 or SCLK/2 |
| EOC/(INT) | End-of-conversion / interrupt output | Configurable as EOC (mode 00 only) or INT (all other modes); asserts on falling edge when data ready |
| VCC | Positive supply | 3–5.5 V analog/digital supply; powers internal reference, ADC core, and digital interface logic |
| A0–A7 | Analog input channels | 8 single-ended or 4 differential inputs; multiplexed via internal break-before-make switch to minimize crosstalk |
| CS | Chip select | Active-low enable; resets internal counter and enables SDI/SDO; must be low during SCLK transitions for SPI compliance |
| REFP / REFM | Reference terminals | Accept external reference or decouple internal 2-V/4-V reference; require 10-µF + 0.1-µF bypass capacitors |
| FS | Frame sync input | Indicates start of DSP serial frame; enables SDI and resets counter when active low; tied to VCC if unused |
| PWDN | Power-down control | Logic-low disables analog and reference circuits; device resumes operation on next CS/FS/CSTART activation |
| CSTART | Asynchronous sampling trigger | Falling edge initiates sampling; rising edge terminates sampling and starts conversion - enables precise timing control for high-Z sources |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 4-V or 2-V reference | Eliminates external reference IC and reduces BOM count while maintaining ±1.2 LSB linearity across temperature |
| Programmable auto-channel sweep | Four sweep sequences (e.g., 0–1–2–3–4–5–6–7) enable automatic multi-sensor polling without host CPU intervention |
| Hardware/software power-down | Reduces quiescent current to 1 µA typical - extends battery life in always-on vehicle subsystems |
| Extended sampling via CSTART | Decouples sampling duration from SCLK frequency - accommodates >1-kΩ source impedances without accuracy loss |
| 8× FIFO with programmable threshold | Stores up to eight conversions; generates INT at 1/4, 1/2, 3/4, or full level - enables burst acquisition with deterministic latency |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Digitizing throttle position, manifold pressure, and oxygen sensor signals in real time under harsh thermal conditions. IC Role / Device Role / Timing Role: Primary 12-bit ADC for closed-loop combustion control with synchronized sampling across multiple sensors. Use Value: ±1.2 LSB INL ensures consistent air-fuel ratio calculation across −40°C to 125°C, reducing emissions compliance risk. | Use Scenario: Acquiring ultrasonic parking sensor echo amplitudes and timing data for object detection algorithms. IC Role / Device Role / Timing Role: High-throughput analog front-end ADC with FIFO buffering for time-of-flight measurement pipelines. Use Value: 200-kSPS throughput and programmable sweep mode allow concurrent sampling of up to 8 transducers per frame. |
| Electric Power Steering (EPS) | Battery Management System (BMS) |
Use Scenario: Monitoring torque sensor outputs and motor phase currents for assist torque computation. IC Role / Device Role / Timing Role: Dual-role ADC supporting both precision DC measurements (torque) and dynamic AC waveforms (current). Use Value: 65 dB SNR + distortion at 12 kHz enables accurate current reconstruction even with PWM switching noise present. | Use Scenario: Measuring cell voltages and pack temperature gradients in 12S lithium-ion traction batteries. IC Role / Device Role / Timing Role: Automotive-qualified ADC with internal reference for isolated voltage monitoring chains. Use Value: Q-temp qualification and 75 dB SFDR suppress harmonics from DC-DC converters, improving voltage measurement fidelity. |
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 |
|---|---|---|---|
| ADS7953QDBTR | 12-bit, 1-MSPS SAR ADC with 16-channel MUX; requires external reference; no built-in FIFO | Higher throughput but lacks integrated FIFO and auto-sweep - demands more host CPU overhead for multi-channel sequencing | Select when sampling rate >200 kSPS is required and system has spare processing bandwidth for channel management |
| MAX11131ATJ+ | 12-bit, 500-kSPS SAR ADC; internal 4.096-V reference; 8-channel MUX; no CSTART pin or programmable sweep | Superior SNR (70 dB) but missing extended sampling control - unsuitable for high-impedance sensor interfaces without external op-amp buffering | Select when highest dynamic range is critical and all sensors have ≤1-kΩ source impedance |
Compared with ADS7953QDBTR and MAX11131ATJ+, the TLV2548QDWG4 uniquely combines automotive temperature range, integrated FIFO, hardware-controlled sampling via CSTART, and programmable auto-sweep - making it optimal for resource-constrained ECUs requiring deterministic multi-sensor acquisition with minimal firmware overhead.
Availability
TLV2548QDWG4 is available at Aetrix Electronics and suitable for engine control units, battery management systems, electric power steering modules, and ADAS sensor hubs requiring stable component supply across automotive production lifecycles.
Supply support for TLV2548QDWG4 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.
The TLV2548QDWG4 belongs to TI's Q-temp automotive ADC family, designed specifically for high-reliability signal acquisition in powertrain, chassis, and safety-critical vehicle subsystems.
FAQ
What is the operating temperature range of the TLV2548QDWG4?
The TLV2548QDWG4 is qualified for operation from −40°C to 125°C and meets automotive AEC-Q100 Grade 1 requirements. This range is explicitly specified in the official datasheet revision October 2009 and applies to the DW package variant. It supports deployment in under-hood environments including engine control units and transmission control modules where ambient temperatures exceed 105°C.
Does the TLV2548QDWG4 require an external reference voltage?
No, the TLV2548QDWG4 includes an internal reference that can be configured for either 2 V or 4 V via the CFR D10 bit. An external reference may be used by setting CFR D11 = 0, but it is not required. When using the internal reference, 10-µF and 0.1-µF capacitors must be placed between REFP and REFM as specified in the datasheet.
How does the CSTART pin function in the TLV2548QDWG4?
The CSTART pin provides asynchronous sampling control: its falling edge initiates sampling, and its rising edge terminates sampling and starts conversion. This decouples sampling duration from SCLK timing, enabling precise control for high-impedance sources (>1 kΩ). CSTART operation requires CS = 1 and internal reference selection for conversion modes 01, 10, and 11.
What are the supported serial interface modes for the TLV2548QDWG4?
The TLV2548QDWG4 supports both SPI-compatible (CS + SCLK + SDI + SDO) and DSP-compatible (FS + SCLK + SDI + SDO) serial interfaces. It uses CPOL = 0 (SCLK idle low) and accepts MSB-first 16-bit command/data frames. The FS pin is optional and should be tied to VCC if unused in microcontroller-based designs.
Can the TLV2548QDWG4 perform continuous channel scanning without host intervention?
Yes, the TLV2548QDWG4 supports programmable auto-channel sweep in sweep (mode 10) and repeat-sweep (mode 11) configurations. Four sweep sequences (e.g., 0–1–2–3–4–5–6–7) are selectable via CFR D(4,3), and the FIFO triggers an interrupt when filled to the programmed threshold - enabling autonomous multi-channel acquisition with minimal host CPU involvement.
TLV2548QDWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- -
TLV2548QDWG4 FAQ
1.How can I place an order for TLV2548QDWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2548QDWG4 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 TLV2548QDWG4 reliable?
The price and inventory of TLV2548QDWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2548QDWG4 is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2548QDWG4 transactions.
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TLV2548QDWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2548QDWG4 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 TLV2548QDWG4?
For technical support, including TLV2548QDWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2548QDWG4 requirements.
6.How does Aetrix verify that TLV2548QDWG4 is sourced from the original manufacturer or authorized distributors?
All TLV2548QDWG4 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 TLV2548QDWG4 meets industry standards.
7.What is the process for return or replacement of TLV2548QDWG4?
All TLV2548QDWG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLV2548QDWG4, 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 TLV2548QDWG4 part is unused and in its original packaging.
Return procedure for TLV2548QDWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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