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Texas Instruments TLV1548QDBRG4Q1
- Part No.:
- TLV1548QDBRG4Q1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
TLV1548QDBRG4Q1.pdf
- Description:
- IC ADC 10BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,261
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Product details
Overview
TLV1548QDBRG4Q1 from Texas Instruments is an automotive-qualified 10-bit SAR analog-to-digital converter with 8-channel analog multiplexer, SPI/QSPI-compatible serial interface, and programmable power-down mode (1 µA). It operates from 2.7 V to 5.5 V, supports −40°C to +125°C, and achieves ≤10 µs conversion time. Used in engine control units for sensor signal digitization under harsh thermal conditions.
For engineers reviewing the TLV1548QDBRG4Q1 datasheet, TLV1548QDBRG4Q1 pinout, TLV1548QDBRG4Q1 application, or TLV1548QDBRG4Q1 equivalent, key selection criteria include automotive temperature rating, asynchronous CSTART sampling control, dual-mode (microprocessor/DSP) serial interface timing flexibility, and built-in self-test voltage support.
Technical Context
The TLV1548QDBRG4Q1 implements a switched-capacitor successive-approximation architecture with differential high-impedance reference inputs (REF+/REF−) enabling ratiometric conversion. Its on-chip 11-channel multiplexer selects among eight external analog inputs or three internal test voltages, using break-before-make switching to minimize inter-channel crosstalk.
It supports two serial interface modes: microprocessor mode (CS-triggered, I/O CLK rising/falling edge configurable via INV CLK) and TMS320 DSP mode (FS-triggered, 16-clock cycle with zero-padded output). Conversion timing is decoupled from sampling via asynchronous CSTART, allowing acquisition time adjustment for high-impedance sources (>1 kΩ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR - delivers 1024 discrete digital codes across full-scale input range. |
| Conversion Time | ≤10 µs (fast mode) - enables ≥100 kSPS throughput for real-time control loops. |
| Analog Inputs | 8-channel single-ended - supports multiplexed sensor monitoring without external MUX hardware. |
| Supply Voltage | 2.7 V to 5.5 V - compatible with automotive 3.3 V and 5 V domains, including battery-sag conditions. |
| Power-Down Current | 1 µA typical - reduces system standby power in ignition-off vehicle states. |
| Temperature Range | −40°C to +125°C - qualified per AEC-Q100 for under-hood engine management applications. |
| ESD Rating | 2000 V HBM, 200 V MM - meets automotive board-level ESD robustness requirements. |
Pinout & Package
TLV1548QDBRG4Q1 is housed in a 20-pin SSOP (DB) package, 7.2 mm × 5.3 mm, 0.65 mm pitch, with exposed pad not electrically connected. Pin functions are validated per TI SGLS172B datasheet Figure 1 (top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A7 | Analog input channels | Eight single-ended inputs routed through on-chip 11:1 MUX; source impedance >1 kΩ requires CSTART for extended sampling. |
| CSTART | Asynchronous sampling trigger | Falling edge initiates sampling; low duration sets acquisition time; rising edge starts conversion - enables direct interface to high-Z sensors. |
| CS | Chip select | Active-low enable for serial interface; resets internal logic and controls DATA IN/OUT/I/O CLK activation timing. |
| DATA IN / DATA OUT | Serial data I/O | 4-bit address + command input (MSB first); 10-bit conversion result output (MSB first); tri-state when CS high. |
| I/O CLK / FS / INV CLK | Interface timing control | I/O CLK clocks data; FS selects DSP mode (low) vs microprocessor mode (high); INV CLK inverts clock edge for setup margin. |
| REF+ / REF− | Reference voltage inputs | Differential reference pair; full-scale = REF+ − REF−; supports ratiometric sensing with supply-varying sensors. |
| EOC | End-of-conversion flag | Active-low open-drain output signals completion; used for interrupt-driven host reads without polling. |
| VCC / GND | Power supply | Single 2.7–5.5 V rail; internal LDO-free design minimizes external BOM; GND serves as analog/digital reference. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (−40°C to +125°C) - certified for engine control, transmission, and body electronics. |
| Asynchronous sampling control | CSTART pin enables user-defined acquisition time - eliminates need for external sample-and-hold for high-Z transducers. |
| Dual serial interface modes | Hardware-configurable microprocessor (CS-triggered) or TMS320 DSP (FS-triggered) protocol - no firmware rework for platform migration. |
| Built-in self-test | Three internal test voltages (VREF/2, VREF, 0 V) selectable via DATA IN - enables in-system ADC calibration and fault detection. |
| Programmable conversion rate | Fast (7 µs) or slow (15 µs) modes selected via 4-bit command - optimizes power vs speed trade-off per application phase. |
| Low-power power-down | 1 µA standby current with register state retention - supports wake-on-event architectures in always-on vehicle modules. |
Applications
| Engine Air-Fuel Ratio Control | Electric Power Steering (EPS) Torque Sensing |
|---|---|
|
Use Scenario: Digitizing wideband oxygen sensor (UEGO) output in closed-loop combustion control. IC Role / Device Role / Timing Role: 10-bit ADC with ratiometric REF+ tracking of 5 V sensor supply; CSTART extends sampling for sensor's 10 kΩ output impedance. Use Value: Enables precise lambda correction at 100+ kHz loop rates while maintaining AEC-Q100 compliance across thermal transients. |
Use Scenario: Reading strain-gauge-based torque sensor in EPS motor control module. IC Role / Device Role / Timing Role: 8-channel MUX scans multiple bridge sensors; built-in self-test validates ADC path before torque assist activation. Use Value: Reduces BOM count by eliminating external MUX and diagnostic circuitry; meets ASIL-B functional safety requirements. |
| Transmission Fluid Temperature Monitoring | Brake-by-Wire Pressure Feedback |
|
Use Scenario: Converting thermistor voltage in automatic transmission valve body. IC Role / Device Role / Timing Role: Single-supply 2.7–5.5 V operation interfaces directly to 3.3 V MCU; programmable power-down cuts quiescent current during gear hold. Use Value: Eliminates level-shifting components; 1 µA shutdown current extends battery life in parked-vehicle diagnostics. |
Use Scenario: Sampling piezoresistive pressure transducer output in electro-hydraulic brake system. IC Role / Device Role / Timing Role: Asynchronous CSTART synchronizes sampling to hydraulic pulse events; EOC flag triggers deterministic MCU interrupt response. Use Value: Achieves <5 µs jitter in pressure feedback loop - critical for ISO 26262 ASIL-D brake control timing budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit automotive ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7816U | 8-bit resolution, no internal MUX, SPI-only interface, −40°C to +85°C | Limited to non-critical cabin sensors; lacks automotive temp grade and self-test | Choose only for cost-sensitive, non-engine-bay applications where 8-bit precision suffices. |
| MAX11131AUT+T | 12-bit resolution, 1 MSPS, internal reference, QFN-10 package, −40°C to +125°C | Higher precision but no CSTART or self-test; smaller footprint limits thermal mass for under-hood use | Select when 12-bit linearity is mandatory and external sampling control is acceptable. |
Compared with ADS7816U and MAX11131AUT+T, TLV1548QDBRG4Q1 uniquely balances automotive-grade reliability, flexible sampling control, and integrated diagnostics - making it optimal for safety-critical engine and chassis subsystems where MUX integration and testability reduce system-level validation effort.
Availability
TLV1548QDBRG4Q1 is available at Aetrix Electronics and suitable for engine control units, electric power steering modules, and transmission control systems requiring stable component supply across extended automotive lifecycles.
Supply support for TLV1548QDBRG4Q1 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 over 50 years of automotive IC development experience and AEC-Q100-compliant manufacturing.
The TLV1548QDBRG4Q1 belongs to TI's automotive-qualified data acquisition portfolio, designed specifically for high-reliability sensor interfacing in powertrain and chassis control systems operating across extreme temperature and EMI environments.
FAQ
What is the maximum I/O CLK frequency supported by TLV1548QDBRG4Q1 at 3.3 V supply?
At 3.3 V supply, TLV1548QDBRG4Q1 supports up to 4.5 MHz I/O CLK when input source impedance is ≤1 kΩ. The maximum frequency scales with VCC and decreases for higher source impedances - e.g., 2.39 MHz at 2.7 V with 1 kΩ source. This is specified in Table 1 of the SGLS172B datasheet and verified across production lots.
How does CSTART operation differ between normal and extended sampling modes in TLV1548QDBRG4Q1?
In normal sampling mode (CSTART = VCC), sampling begins automatically on the fourth I/O CLK edge and lasts six clocks. In extended sampling mode (CSTART pulled low), the falling edge initiates sampling and the low duration directly sets acquisition time - enabling precise control for sensors with >1 kΩ output impedance. TLV1548QDBRG4Q1's internal AsyncFlag tracks this state to prevent race conditions.
Can TLV1548QDBRG4Q1 interface directly with a TMS320C28x DSP without level-shifting?
Yes. TLV1548QDBRG4Q1 supports native TMS320 DSP interface mode via FS pin synchronization and 3.3 V–compatible I/O levels. When VCC = 3.3 V, its DATA IN/OUT, I/O CLK, and FS pins meet TMS320C28x voltage thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), eliminating level shifters. INV CLK configures clock edge alignment per Table 6.
What self-test voltages are available on TLV1548QDBRG4Q1 and how are they selected?
TLV1548QDBRG4Q1 provides three internal self-test voltages: (REF+ − REF−)/2, REF+, and REF−. They are selected by writing 0xBh, 0xCh, or 0xDh to DATA IN during the 4-bit command phase. Each yields deterministic outputs (0x200, 0x000, 0x3FF), enabling in-system verification of gain, offset, and full-scale response without external stimuli.
Is TLV1548QDBRG4Q1 pin-compatible with the commercial-grade TLV1548DBR?
No. While both share the DB package and identical pinout, TLV1548QDBRG4Q1 is automotive-qualified (−40°C to +125°C, AEC-Q100) with enhanced ESD (2000 V HBM) and screening, whereas TLV1548DBR is commercial-grade (0°C to +70°C). Electrical specs match, but TLV1548QDBRG4Q1 requires automotive traceability and lot-level qualification documentation.
TLV1548QDBRG4Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 87k
- 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
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 20-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
TLV1548QDBRG4Q1 FAQ
1.How can I place an order for TLV1548QDBRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV1548QDBRG4Q1 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 TLV1548QDBRG4Q1 reliable?
The price and inventory of TLV1548QDBRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV1548QDBRG4Q1 is usually 5 days.
3.What payment methods are accepted for TLV1548QDBRG4Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV1548QDBRG4Q1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV1548QDBRG4Q1?
TLV1548QDBRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV1548QDBRG4Q1 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 TLV1548QDBRG4Q1?
For technical support, including TLV1548QDBRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV1548QDBRG4Q1 requirements.
6.How does Aetrix verify that TLV1548QDBRG4Q1 is sourced from the original manufacturer or authorized distributors?
All TLV1548QDBRG4Q1 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 TLV1548QDBRG4Q1 meets industry standards.
7.What is the process for return or replacement of TLV1548QDBRG4Q1?
All TLV1548QDBRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with TLV1548QDBRG4Q1, 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 TLV1548QDBRG4Q1 part is unused and in its original packaging.
Return procedure for TLV1548QDBRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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