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Texas Instruments TLV2548MFKB
- Part No.:
- TLV2548MFKB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-CLCC
- Datasheet:
-
TLV2548MFKB.pdf
- Description:
- TLV2548M 12-BIT 200 KSPS ADC SER
- Quantity:
- Payment:
- Shipping:
Inventory:197
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Product details
Overview
TLV2548MFKB from Texas Instruments is a 12-bit, 200-KSPS SAR analog-to-digital converter (ADC) with integrated 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 −55°C to 125°C - designed for high-reliability automotive sensor signal acquisition.
For engineers reviewing the TLV2548MFKB datasheet, TLV2548MFKB pinout, TLV2548MFKB application, or TLV2548MFKB equivalent, key selection considerations include its extended sampling via CSTART pin, programmable auto-channel sweep modes (sweep/repeat sweep), internal 2-V/4-V reference options, hardware/software power-down (1 µA typ), and Q-Temp automotive qualification.
Technical Context
The TLV2548MFKB uses a charge redistribution SAR architecture with break-before-make analog multiplexer supporting 8 single-ended or 4 differential inputs. Its configurable conversion clock source (internal OSC, SCLK, SCLK/2, or SCLK/4) enables conversion times as low as 2.8 µs when using a 20-MHz SCLK.
It implements four conversion modes (one-shot, repeat, sweep, repeat sweep) with FIFO-triggered interrupt generation and supports both microprocessor (SPI) and DSP (FS-synchronized) host interfaces. Sampling period is programmable (12 or 24 SCLKs) or fully hardware-controlled via CSTART for precise timing in high-impedance or variable-source applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1 LSB = VREF/4096 quantization step for precision sensor digitization. |
| Max Throughput | 200 KSPS - supports real-time monitoring of fast-changing analog signals like engine knock or motor phase current. |
| INL/DNL Error | ±1.2 LSB (−55°C to 125°C) - ensures monotonicity and minimal code missing across full automotive temperature range. |
| SNDR | 65 dB at fi = 12 kHz - sufficient for 10.7-bit effective resolution in noise-sensitive automotive control loops. |
| Supply Range | 3 V to 5.5 V - compatible with standard automotive 3.3-V and 5-V domains without level-shifting. |
| Power Consumption | 1.7 mA at 3.3 V (internal ref); 1 µA in software/hardware power-down - enables low-quiescent-current ECU subsystems. |
| Analog BW | 500 kHz - supports anti-aliasing filter design for signals up to Nyquist (100 kHz at 200 KSPS). |
Pinout & Package
TLV2548MFKB is housed in a 20-pin LCCC (FK) ceramic package with side-brazed leads, rated for high-reliability automotive operation and qualified per AEC-Q100.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDO | Serial data output | 3-state MSB-first output; presents conversion result or CFR content after CS/FS trigger - enables daisy-chaining or shared bus use. |
| SDI | Serial data input | Accepts 16-bit command + configuration data (e.g., A000h for initialization); supports both SPI (CS-triggered) and DSP (FS-triggered) protocols. |
| SCLK | Serial clock input | Up to 20 MHz; serves as interface clock and optional conversion clock source (SCLK, SCLK/2, SCLK/4) - decouples I/O speed from conversion timing. |
| EOC/(INT) | End-of-conversion / interrupt output | Configurable as EOC (mode 00 only) or INT (all other modes); asserts on data-ready - synchronizes host CPU reads without polling. |
| CS | Chip select | Active-low enable for serial interface; resets internal counter and enables SDI/SDO - required for SPI mode; can be held low in DSP mode with active FS. |
| CSTART | Asynchronous sampling start | Falling edge initiates sampling; rising edge ends sampling and starts conversion - provides deterministic, SCLK-independent timing for high-Z sources. |
| PWDN | Power-down control | Logic low disables analog and reference circuits; device resumes on CS/FS/CSTART activation - supports ultra-low-power sleep states. |
| 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 - ensures stable reference under EMI-prone conditions. |
| A0–A7 | Analog input channels | 8 single-ended inputs (or 4 differential pairs); multiplexed via internal MUX - enables multi-sensor acquisition (e.g., temp, pressure, position) with one ADC. |
| FS | Frame sync input | Indicates start of serial data frame in DSP mode; resets internal counter - aligns ADC timing with TMS320-series processor DMA cycles. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable auto-channel sweep | Four sweep sequences (0–7, 0–2–4–6, etc.) with FIFO-triggered INT - reduces host CPU overhead in multi-sensor diagnostics. |
| Built-in reference & conversion clock | Selectable 2-V or 4-V internal reference; internal OSC or SCLK-derived conversion clock - eliminates external components and simplifies BOM. |
| Hardware-controlled extended sampling | CSTART pin enables user-defined sampling duration independent of SCLK - critical for accurate digitization of high-impedance thermistors or piezoelectric sensors. |
| 8× FIFO with configurable trigger levels | FIFO fill thresholds at 1/4, 1/2, 3/4, or full (levels 1, 3, 5, or 7) - allows flexible interrupt latency tuning for real-time control vs. data logging trade-offs. |
| Q-Temp automotive qualification | Tested and qualified from −55°C to 125°C with configuration control and print support - meets AEC-Q100 Grade 1 requirements for engine bay and transmission modules. |
Applications
| Engine Control Unit (ECU) Sensor Interface | Brake-by-Wire Pressure Monitoring |
|---|---|
Use Scenario: Digitizing analog outputs from manifold absolute pressure (MAP), throttle position (TPS), and coolant temperature sensors in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Central 12-bit ADC acquiring 8 sensor channels with programmable sweep and FIFO buffering to feed microcontroller ADC peripheral. Use Value: Eliminates need for multiple discrete ADCs; ±1.2 LSB INL ensures consistent air-fuel ratio calculation across temperature extremes. | Use Scenario: Real-time acquisition of dual redundant brake pressure transducers in electro-hydraulic brake systems. IC Role / Device Role / Timing Role: High-reliability ADC performing synchronized sampling of two pressure channels with CSTART-triggered extended sampling for settling accuracy. Use Value: 200-KSPS throughput and 65 dB SNDR support closed-loop pressure control with <100 µs latency; Q-Temp rating ensures operation at transmission-fluid temperatures. |
| Electric Power Steering (EPS) Motor Current Sensing | Onboard Charger (OBC) Voltage Monitoring |
Use Scenario: Measuring phase currents in 3-phase EPS motor inverters using shunt resistors and op-amp conditioning. IC Role / Device Role / Timing Role: SAR ADC with 500 kHz analog bandwidth capturing fast current transients during torque assist events. Use Value: Short/long sampling modes accommodate varying op-amp settling times; internal 4-V reference improves dynamic range for ±50 mV shunt signals. | Use Scenario: Monitoring DC-link, battery, and AC-input voltages in bidirectional OBCs for EVs. IC Role / Device Role / Timing Role: Multi-channel voltage monitor interfacing with isolation amplifiers and feeding safety-critical MCU for insulation monitoring and fault detection. Use Value: Hardware power-down (1 µA) minimizes standby loss; REFP/REFM differential reference rejection suppresses common-mode noise from switching converters. |
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 |
|---|---|---|---|
| ADS7816UB | 12-bit, 200-KSPS, SPI-only interface; no FIFO, no CSTART, no internal reference; requires external ref and clock. | Lacks auto-sweep, extended sampling, and power-down modes - suitable only for simple single-channel acquisition. | Choose ADS7816UB only if board space is constrained and system already provides precision reference/clock; TLV2548MFKB offers higher integration and automotive robustness. |
| MAX11131ATJ+ | 12-bit, 500-KSPS, internal reference, SPI interface; no FIFO, no CSTART, no automotive temp grade (−40°C to +125°C only). | Higher speed but lacks FIFO buffering and extended sampling - insufficient for multi-sensor sweep or high-Z sensor timing control. | MAX11131ATJ+ fits high-speed single-channel needs but cannot replace TLV2548MFKB in Q-Temp or FIFO-dependent automotive designs. |
Compared with ADS7816UB and MAX11131ATJ+, the TLV2548MFKB uniquely combines Q-Temp qualification, 8× FIFO, CSTART-controlled sampling, and dual internal references - making it the only option for production automotive systems requiring simultaneous multi-channel acquisition with deterministic timing and ultra-low-power sleep.
Availability
TLV2548MFKB is available at Aetrix Electronics and suitable for engine control units, brake-by-wire systems, electric power steering modules, and onboard chargers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLV2548MFKB 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 ICs, with decades of experience in high-reliability signal chain solutions.
The TLV2548MFKB belongs to TI's Q-Temp automotive ADC family, engineered specifically for under-hood and transmission-control applications demanding extended temperature operation, functional safety readiness, and long-term supply stability.
FAQ
What is the operating temperature range of the TLV2548MFKB?
The TLV2548MFKB is characterized for operation from −55°C to 125°C and is Q-Temp qualified for high-reliability automotive applications. This extended range exceeds standard industrial grades and supports placement in engine compartments, transmissions, and powertrain control modules where ambient temperatures exceed 105°C.
Does the TLV2548MFKB require an external reference voltage?
No, the TLV2548MFKB includes selectable internal reference voltages of 2 V or 4 V, eliminating the need for external reference components in most applications. External reference operation is supported via REFP/REFM pins when higher precision or custom voltage scaling is required, but internal reference usage simplifies design and reduces BOM cost.
How does the CSTART pin function in the TLV2548MFKB?
The CSTART pin provides asynchronous, hardware-controlled sampling initiation in the TLV2548MFKB. Its falling edge starts sampling; rising edge ends sampling and triggers conversion - enabling precise, SCLK-independent timing for high-impedance sensors. This feature is essential for accurate acquisition from thermistors, RTDs, or piezoelectric elements where source impedance exceeds 1 kΩ.
What are the supported conversion modes in the TLV2548MFKB?
The TLV2548MFKB supports four conversion modes: one-shot (single conversion), repeat (repeated sampling of one channel), sweep (sequential sampling of programmed channel list), and repeat sweep (cyclic multi-channel acquisition). All modes except one-shot use the 8× FIFO and generate interrupts upon reaching configurable fill thresholds - optimizing host CPU efficiency in sensor-rich automotive systems.
Is the TLV2548MFKB pin-compatible with other devices in the TLV254x family?
Yes, the TLV2548MFKB shares identical pinout and functionality with the TLV2548QDW (20-SOIC) and TLV2544QD (16-SOIC), differing only in package type (20-LCCC FK) and temperature qualification (−55°C to 125°C vs. −40°C to 125°C). The pin mapping, register structure, command set, and electrical behavior are fully consistent across the family - enabling drop-in replacement in Q-Temp designs.
TLV2548MFKB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-CLCC
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 8
- Input Type:
- Single Ended
- Data Interface:
- 4-Wire Serial, SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- -
- 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:
- Internal Oscillator
- Operating Temperature:
- -55°C ~ 125°C
- Supplier Device Package:
- 20-LCCC (8.89x8.89)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLV2548MFKB FAQ
1.How can I place an order for TLV2548MFKB through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2548MFKB 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 TLV2548MFKB reliable?
The price and inventory of TLV2548MFKB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2548MFKB is usually 5 days.
3.What payment methods are accepted for TLV2548MFKB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2548MFKB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2548MFKB?
TLV2548MFKB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2548MFKB 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 TLV2548MFKB?
For technical support, including TLV2548MFKB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2548MFKB requirements.
6.How does Aetrix verify that TLV2548MFKB is sourced from the original manufacturer or authorized distributors?
All TLV2548MFKB 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 TLV2548MFKB meets industry standards.
7.What is the process for return or replacement of TLV2548MFKB?
All TLV2548MFKB units undergo pre-shipment inspection (PSI). If there is an issue with TLV2548MFKB, 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 TLV2548MFKB part is unused and in its original packaging.
Return procedure for TLV2548MFKB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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