My Inquiry
My Account
Texas Instruments TLV2548QDW
- Part No.:
- TLV2548QDW
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TLV2548QDW.pdf
- Description:
- IC ADC 12BIT SAR 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,444
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLV2548QDW from Texas Instruments is a 12-bit, 200-kSPS automotive-grade SAR analog-to-digital converter with integrated reference, on-chip 8× FIFO, SPI/DSP-compatible serial interface, and hardware-programmable sampling control. It operates from 3 V to 5.5 V, supports differential/nonlinearity error 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 TLV2548QDW datasheet, TLV2548QDW pinout, TLV2548QDW application, or TLV2548QDW equivalent, key selection considerations include its Q-temp automotive qualification, programmable auto-channel sweep capability, extended sampling via CSTART pin, internal/external reference flexibility, and 20-pin SOIC (DW) package compatibility with high-reliability embedded systems.
Technical Context
The TLV2548QDW implements a charge redistribution SAR architecture with break-before-make analog multiplexer supporting up to eight single-ended or four differential inputs. Its conversion clock is selectable between internal oscillator, SCLK, SCLK/2, or SCLK/4 - enabling conversion times as fast as 2.8 µs with 20-MHz SCLK.
It features four configurable conversion modes (one-shot, repeat, sweep, repeat-sweep), EOC/INT dual-function pin, and hardware/software power-down modes consuming only 1 µA typical in autopower-down. The built-in 4-V or 2-V internal reference and external reference support (REFP/REFM) provide design flexibility without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1 LSB = VREF/4096 quantization step for high-precision measurement of analog sensor outputs. |
| Max Throughput | 200 kSPS - supports real-time sampling of fast-changing signals such as crankshaft position or knock detection waveforms. |
| DNL/INL Error | ±1.2 LSB (−40°C to 125°C) - ensures monotonicity and linearity across full automotive temperature range without calibration. |
| SNR | 65 dB at fi = 12 kHz - enables accurate digitization of mid-bandwidth analog signals like throttle position or oxygen sensor outputs. |
| Supply Range | 3 V to 5.5 V - compatible with both 3.3-V and 5-V microcontroller domains without level-shifting circuitry. |
| Reference Options | Internal 2-V or 4-V shunt reference, or external reference via REFP/REFM - eliminates need for external voltage reference ICs in cost-sensitive designs. |
| Interface | SPI/DSP-compatible 4-wire serial (SDI/SDO/SCLK/CS) + FS frame sync - interoperable with TMS320 DSPs and ARM Cortex-M MCUs. |
| Power Consumption | 1.7 mA at 3.3 V (internal ref), 2.4 mA at 5.5 V (internal ref); 1 µA in autopower-down - reduces thermal load and extends battery life in always-on modules. |
Pinout & Package
TLV2548QDW is housed in a 20-pin SOIC (DW) package with 0.3-inch body width and standard JEDEC MS-013 footprint. Pin assignments are validated per TI SGLS119F datasheet Figure 1 (DW package top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SDO) | Serial data output | 3-state MSB-first output for conversion results or configuration register reads; tri-states when CS is high. |
| 2 (SDI) | Serial data input | Accepts 16-bit command + configuration data; MSB (D15) first; supports SPI and DSP frame-sync protocols. |
| 3 (SCLK) | Serial clock input | Drives SDI latching and SDO timing; also selectable as conversion clock source (SCLK, SCLK/2, SCLK/4). |
| 4 (EOC/(INT)) | End-of-conversion / interrupt output | Configurable as EOC (mode 00 only) or INT (all other modes); asserts low when FIFO threshold or conversion complete. |
| 5 (VCC) | Positive supply | Single 3–5.5 V rail powers analog and digital sections; no separate AVDD/DVDD required. |
| 6–9, 14–17 (A0–A7) | Analog input channels | Eight single-ended or four differential inputs; multiplexed internally; max 500-kHz analog bandwidth. |
| 10 (CSTART) | Asynchronous sampling trigger | Hardware-controlled start/stop of sampling period; independent of SCLK; enables extended sampling for high-Z sources. |
| 11 (GND) | Analog/digital ground | Common return for all circuitry; requires low-impedance connection to system ground plane. |
| 12 (PWDN) | Power-down control | Active-low enable for analog and reference circuits; enters 1-µA standby when pulled low. |
| 13 (FS) | DSP frame sync input | Indicates start of serial data frame; resets internal counter; required for TMS320 DSP interface mode. |
| 16 (CS) | Chip select | Active-low enables serial interface; must be low during SCLK transitions; falling edge initiates command decode. |
| 18 (REFM) | Reference negative terminal | Ground reference for internal reference or negative input for external reference; decoupled with 10 µF + 0.1 µF. |
| 19 (REFP) | Reference positive terminal | Positive reference input; sets full-scale range (VREFP − VREFM); supports external reference up to VCC. |
| 20 (A3) | Analog input channel 3 | Part of 8-channel analog multiplexer; shares pin with A3 function in TLV2548Q; not used in TLV2544Q. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Q-temp qualification | Specified and tested for −40°C to 125°C operation with configuration control and automotive AEC-Q100 alignment. |
| Programmable auto-channel sweep | Four sweep sequences (e.g., 0–1–2–3–4–5–6–7) configurable via CFR bits D4–D3; enables automatic multi-sensor polling without host intervention. |
| Built-in 8× FIFO buffer | Reduces host CPU overhead by storing up to eight conversion results; triggers INT at user-defined fill levels (1/4, 1/2, 3/4, full). |
| Extended sampling via CSTART | Hardware-triggered sampling period controlled by CSTART low time; decouples sampling duration from SCLK frequency for high-impedance sensors. |
| Flexible reference architecture | Selectable 2-V or 4-V internal reference, or external reference via REFP/REFM; eliminates BOM cost and board space for external refs. |
| Multiple power-down modes | Software/hardware/autopower-down options reduce current to 1 µA typical; enables ultra-low-power wake-on-event architectures. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
|
Use Scenario: Digitizing analog outputs from wideband oxygen sensors, MAP sensors, and knock detection piezoelectric elements in real time. IC Role / Device Role / Timing Role: Primary ADC for closed-loop combustion control; samples at 200 kSPS with programmable sweep across 8 sensor channels. Use Value: Enables precise air-fuel ratio calculation using 12-bit resolution and ±1.2 LSB INL across full automotive temperature range. |
Use Scenario: Acquiring analog video signals from radar front-end IF stages or camera sensor bias voltages in lane departure warning modules. IC Role / Device Role / Timing Role: High-speed analog interface for sensor preprocessing; uses FIFO and INT to offload MCU during burst capture. Use Value: Reduces host interrupt latency via programmable FIFO threshold and supports 65 dB SNR for clean IF signal digitization. |
| Electric Power Steering (EPS) | Onboard Diagnostics (OBD-II) |
|
Use Scenario: Monitoring torque sensor bridge outputs and motor phase currents in real time for assist torque computation. IC Role / Device Role / Timing Role: Dual-role ADC handling both high-accuracy DC torque sensing and dynamic current monitoring with extended sampling. Use Value: CSTART pin enables stable sampling of high-impedance torque sensor bridges without external op-amp buffering. |
Use Scenario: Reading multiple analog diagnostic signals (fuel tank pressure, coolant temp, exhaust gas recirculation valve position) for emissions compliance reporting. IC Role / Device Role / Timing Role: Multi-channel data acquisition hub; uses auto-sweep mode to cycle through 8 OBD-II analog inputs without software polling. Use Value: Internal 4-V reference provides stable full-scale range across battery voltage fluctuations (9–16 V), ensuring consistent diagnostic accuracy. |
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 |
|---|---|---|---|
| ADS7822U | 8-bit, 200-kSPS, single-ended only, no FIFO, no internal reference, 10-pin MSOP package | Lacks multi-channel sweep, FIFO, and reference integration; suitable only for simple single-signal monitoring | Choose ADS7822U only if 8-bit resolution suffices and board space constraints favor MSOP over SOIC. |
| MAX11131ATJ+ | 12-bit, 500-kSPS, internal reference, SPI-only (no FS), 16-pin TQFN, −40°C to +125°C | Higher speed but no CSTART pin, no auto-sweep, and no Q-temp documentation or automotive qualification process | Select MAX11131ATJ+ only when throughput >200 kSPS is mandatory and automotive qualification is not required. |
Compared with TLV2548QDW, ADS7822U trades resolution and integration for size, while MAX11131ATJ+ offers higher speed but lacks automotive qualification, CSTART control, and programmable sweep - making TLV2548QDW uniquely suited for Q-temp-compliant, multi-sensor automotive subsystems.
Availability
TLV2548QDW is available at Aetrix Electronics and suitable for engine control units, ADAS sensor interfaces, electric power steering systems, and onboard diagnostics modules requiring stable component supply under automotive qualification requirements.
Supply support for TLV2548QDW 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-grade product development and manufacturing expertise.
The TLV2548QDW belongs to TI's Q-temp automotive ADC family, designed specifically for high-reliability signal acquisition in powertrain, chassis, and safety-critical vehicle subsystems operating across extended temperature ranges.
FAQ
What is the maximum sampling rate supported by the TLV2548QDW?
The TLV2548QDW achieves a maximum throughput of 200 kSPS under specified conditions. This rate is attainable using the SCLK-as-conversion-clock mode (CFR D8–D7 = 01) with a 20-MHz SCLK, yielding a 2.8-µs conversion time. Actual sustained rate depends on interface protocol overhead, FIFO management, and sampling period configuration (short vs. long).
Does the TLV2548QDW require an external reference voltage?
No, the TLV2548QDW does not require an external reference voltage. It integrates selectable 2-V or 4-V internal references, configurable via CFR bit D11 and D10. External reference operation is optional and enabled by setting CFR D11 = 0, connecting precision voltage between REFP and REFM terminals.
How many analog input channels does the TLV2548QDW support?
The TLV2548QDW supports eight single-ended analog input channels (A0–A7), as confirmed by its DW-package pinout and functional description in the SGLS119F datasheet. It also supports four pseudo-differential input pairs (e.g., A0–A1, A2–A3) using the internal multiplexer, but does not implement true fully differential input architecture.
What is the purpose of the CSTART pin on the TLV2548QDW?
The CSTART pin on the TLV2548QDW provides hardware-controlled asynchronous sampling initiation and duration. Its falling edge starts sampling; rising edge ends sampling and begins conversion. This enables precise, SCLK-independent sampling periods - critical for high-impedance sensor sources where fixed SCLK-based sampling would cause settling errors.
Is the TLV2548QDW qualified for automotive applications?
Yes, the TLV2548QDW is explicitly characterized and qualified for automotive use. It carries the "Q" suffix denoting Q-temp automotive grade, is specified for operation from −40°C to +125°C, and undergoes configuration control, print support, and qualification to automotive reliability standards per TI's documentation.
TLV2548QDW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- -
TLV2548QDW FAQ
1.How can I place an order for TLV2548QDW through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2548QDW 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 TLV2548QDW reliable?
The price and inventory of TLV2548QDW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2548QDW is usually 5 days.
3.What payment methods are accepted for TLV2548QDW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2548QDW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2548QDW?
TLV2548QDW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2548QDW 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 TLV2548QDW?
For technical support, including TLV2548QDW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2548QDW requirements.
6.How does Aetrix verify that TLV2548QDW is sourced from the original manufacturer or authorized distributors?
All TLV2548QDW 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 TLV2548QDW meets industry standards.
7.What is the process for return or replacement of TLV2548QDW?
All TLV2548QDW units undergo pre-shipment inspection (PSI). If there is an issue with TLV2548QDW, 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 TLV2548QDW part is unused and in its original packaging.
Return procedure for TLV2548QDW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLV2548QDW Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
