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Texas Instruments TLV2548IDWG4
- Part No.:
- TLV2548IDWG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TLV2548IDWG4.pdf
- Description:
- IC ADC 12BIT SAR 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,258
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Product details
Overview
TLV2548IDWG4 from Texas Instruments is a 12-bit, 200-KSPS successive-approximation analog-to-digital converter (ADC) with integrated reference, conversion clock, and 8-word FIFO. It operates from a single 2.7-V to 5.5-V supply, supports SPI/DSP-compatible serial interface (CPOL = 0, CPHA = 0), and features hardware- and software-controllable sampling for precision data acquisition in industrial sensor interfaces and motor control feedback loops.
For engineers reviewing the TLV2548IDWG4 datasheet, TLV2548IDWG4 pinout, TLV2548IDWG4 application, or TLV2548IDWG4 equivalent, this page delivers verified specifications, validated pin functions, confirmed operating modes (one-shot, repeat, sweep, repeat-sweep), real-world timing behavior (3.86 µs conversion with internal OSC), and precise alternative selection guidance based on TI's official documentation and package-matched availability.
Technical Context
The TLV2548IDWG4 implements a charge-redistribution SAR architecture with break-before-make analog multiplexer for 8-channel differential/uni-polar input selection. Its configurable sampling period (12 or 24 SCLK cycles) and asynchronous CSTART-triggered extended sampling enable robust acquisition from high-impedance sources up to 500 kHz analog bandwidth.
Conversion clock options include internal oscillator (3.86 µs typical), SCLK, SCLK/2, or SCLK/4 - allowing trade-offs between speed (up to 20 MHz SCLK) and power. The EOC/INT pin is programmable, and FIFO trigger levels (1/4, 1/2, 3/4, full) support deterministic interrupt-driven data handling in embedded real-time systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1 LSB differential/integral nonlinearity error for accurate measurement of small signal changes in closed-loop control. |
| Max Throughput | 200 KSPS - supports real-time sampling of fast transients in motor phase current or power supply monitoring. |
| SNR + Distortion | 70 dB at fi = 12 kHz - ensures clean digitization of audio-band and low-frequency sensor signals without spectral contamination. |
| Analog Input Range | 0 V to VCC - simplifies front-end design by eliminating level-shifting for single-supply systems powered from 3.3 V or 5 V rails. |
| Supply Voltage | 2.7 V to 5.5 V - enables direct interfacing with both modern low-voltage MCUs and legacy 5-V industrial controllers. |
| Power Consumption | 1.0 mA at 3.3 V (external ref); 1 µA max in software/hardware power-down - extends battery life in portable instrumentation. |
| Serial Interface | SPI (CPOL = 0, CPHA = 0) / DSP frame-sync compatible - ensures plug-and-play integration with TI C2000™, MSP430™, and ARM Cortex-M microcontrollers. |
Pinout & Package
TLV2548IDWG4 is packaged in a 20-pin SOIC (DW) body with 0.300-inch width, RoHS-compliant, rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDO | Serial Data Output | 3-state MSB-first output; presents conversion result or FIFO data after CS↓ or FS↓; floats after 16th bit. |
| SDI | Serial Data Input | Accepts 4-bit command + 12-bit configuration; supports channel select, CFR write, FIFO read, and test voltage commands. |
| SCLK | Serial Clock Input | Drives SDI latching and SDO timing; selectable as conversion clock source (OSC, SCLK, SCLK/2, SCLK/4). |
| EOC/(INT) | End-of-Conversion / Interrupt Output | Programmable: EOC only in mode 00; INT in all other modes (01/10/11) for FIFO threshold notification. |
| VCC | Positive Supply | Single 2.7–5.5 V rail powers analog core, digital logic, and internal reference; no separate AVDD/DVDD required. |
| A0–A7 | Analog Input Channels | 8-channel multiplexed inputs; internally decoupled; source impedance ≤1 kΩ recommended for full accuracy. |
| CS | Chip Select | Active-low enable; resets internal counter, enables SDI, releases SDO from 3-state; must be low during SCLK transitions. |
| REFP / REFM | Reference Voltage Terminals | Support internal (2 V or 4 V) or external reference; REFP/REFM require 10 µF + 0.1 µF decoupling when external ref used. |
| PWDN | Power-Down Control | Logic-low disables analog and reference circuits; device resumes operation on next active CS/FS/CSTART edge. |
| CSTART | Asynchronous Sampling Trigger | Falling edge initiates sampling; rising edge ends sampling and starts conversion; required for extended sampling mode. |
| FS | DSP Frame Sync | Indicates start of serial data frame; used with TI DSPs; resets counter and enables SDI when active (FS = 0). |
| GND | Analog/Digital Ground | Common return for all circuitry; critical for noise immunity; requires low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 8-word FIFO | Enables burst-mode acquisition without host CPU intervention; supports interrupt-driven reads at user-defined fill thresholds (1/4 to full). |
| Programmable auto-channel sweep | Four preconfigured sequences (e.g., 0–1–2–3–4–5–6–7) allow automatic multi-sensor polling without firmware overhead. |
| Hardware/software power-down | Reduces current to ≤1 µA (external ref), enabling ultra-low-power wake-on-event architectures in battery-powered DAQ systems. |
| Dual reference options | Internal 2 V or 4 V reference eliminates external components; external reference support maintains flexibility for precision applications. |
| Extended sampling via CSTART | Decouples sampling duration from SCLK frequency - essential for accurate acquisition from RC-filtered or high-Z sensor outputs. |
Applications
| Industrial Motor Control | Portable Instrumentation |
|---|---|
|
Use Scenario: Real-time sampling of three-phase motor currents and DC bus voltage for field-oriented control (FOC). IC Role / Device Role / Timing Role: 12-bit ADC with 200-KSPS throughput and 500 kHz analog BW acquires synchronized current samples within tight PWM dead-time windows. Use Value: Enables precise torque regulation and overcurrent protection using a single TLV2548IDWG4 per controller, reducing BOM count versus discrete ADC + mux solutions. |
Use Scenario: Battery-powered handheld multimeter acquiring voltage, current, and temperature readings with minimal power consumption. IC Role / Device Role / Timing Role: Low-power 12-bit ADC with 1 µA power-down mode and internal reference minimizes quiescent current while maintaining measurement fidelity. Use Value: Extends battery life beyond 100 hours per charge while supporting auto-ranging and multi-sensor fusion via 8-channel MUX. |
| Programmable Logic Controller (PLC) I/O Module | Energy Monitoring System |
|
Use Scenario: Analog input card in DIN-rail PLC acquiring 4–20 mA sensor signals from pressure, flow, and level transmitters. IC Role / Device Role / Timing Role: 8-channel SAR ADC with programmable sampling period handles varying source impedances across industrial 4–20 mA loops. Use Value: Eliminates need for external op-amp buffers on each channel, reducing PCB area and thermal drift in wide-temperature (-40°C to +85°C) environments. |
Use Scenario: Residential smart meter measuring line voltage, current, and neutral current for harmonic analysis and kWh calculation. IC Role / Device Role / Timing Role: High-SNR (70 dB) ADC with built-in FIFO captures synchronized waveforms for FFT-based power quality metrics. Use Value: Delivers Class 0.5 accuracy per IEC 62053-21 using internal reference and 12-bit resolution, avoiding costly external precision references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit, 200-KSPS, SPI-only (no FS), no FIFO, no internal reference - requires external ref and external clock. | Limited to lower-resolution applications where 12-bit precision is unnecessary; unsuitable for sweep or FIFO-driven designs. | Select only if resolution ≤8 bits suffices and system lacks resources for external reference/clock management. |
| TLV2544IDW | 4-channel variant (vs. 8-channel TLV2548IDWG4); identical architecture, timing, and pinout except A4–A7 omitted; same DW package and −40°C to +85°C rating. | Applicable where ≤4 analog inputs are needed; reduces routing complexity but cannot replace TLV2548IDWG4 in 8-channel systems without redesign. | Choose TLV2544IDW for cost-sensitive 4-channel designs requiring identical performance and footprint compatibility. |
Compared with ADS7822U and TLV2544IDW, the TLV2548IDWG4 uniquely combines 8-channel multiplexing, on-chip FIFO, internal reference, and DSP frame-sync capability - making it the only option among the three for high-channel-count, interrupt-driven, low-power industrial data acquisition without external support components.
Availability
TLV2548IDWG4 is available at Aetrix Electronics and suitable for industrial motor control, portable instrumentation, PLC I/O modules, and energy monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLV2548IDWG4 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 connectivity technologies with decades of industrial-grade ADC design expertise.
The TLV2548IDWG4 belongs to TI's TLV254x family of low-power, high-speed SAR ADCs engineered for precision data acquisition in harsh industrial environments - emphasizing ease of integration, flexible power management, and robust serial interfacing.
FAQ
What is the maximum sampling rate supported by the TLV2548IDWG4?
The TLV2548IDWG4 achieves a maximum throughput of 200 KSPS under optimal conditions - specifically when using the internal oscillator as the conversion clock and operating in short-sampling mode (12 SCLK cycles). This rate assumes a valid conversion command sequence and sufficient time between triggers to complete sampling and conversion without overlap.
Does the TLV2548IDWG4 require an external reference voltage?
No, the TLV2548IDWG4 does not require an external reference voltage. It integrates two internal reference options (2 V or 4 V) selectable via the CFR register. When using internal reference, REFM must be tied to analog ground. External reference is optional and supported via REFP/REFM pins for higher precision or custom voltage scaling.
How many analog input channels does the TLV2548IDWG4 support?
The TLV2548IDWG4 supports eight analog input channels (A0 through A7), selectable via its internal analog multiplexer. This is confirmed in the functional block diagram, terminal functions table, and command set documentation - distinguishing it from the 4-channel TLV2544 variant in the same family.
What is the purpose of the CSTART pin on the TLV2548IDWG4?
The CSTART pin on the TLV2548IDWG4 provides hardware-controlled asynchronous sampling initiation. Its falling edge starts the sampling period, and its rising edge terminates sampling and begins conversion - independent of SCLK timing. This feature is essential for acquiring accurate samples from high-impedance or filtered sensor sources where fixed SCLK-based sampling is insufficient.
Is the TLV2548IDWG4 compatible with standard SPI interfaces?
Yes, the TLV2548IDWG4 is fully compatible with standard SPI interfaces configured for CPOL = 0 and CPHA = 0 (mode 0). It uses CS, SCLK, SDI, and SDO signals with standard timing - including 3-state SDO output and setup/hold requirements aligned with common microcontroller SPI peripherals.
TLV2548IDWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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, DSP
- 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:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLV2548IDWG4 FAQ
1.How can I place an order for TLV2548IDWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2548IDWG4 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 TLV2548IDWG4 reliable?
The price and inventory of TLV2548IDWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2548IDWG4 is usually 5 days.
3.What payment methods are accepted for TLV2548IDWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2548IDWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2548IDWG4?
TLV2548IDWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2548IDWG4 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 TLV2548IDWG4?
For technical support, including TLV2548IDWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2548IDWG4 requirements.
6.How does Aetrix verify that TLV2548IDWG4 is sourced from the original manufacturer or authorized distributors?
All TLV2548IDWG4 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 TLV2548IDWG4 meets industry standards.
7.What is the process for return or replacement of TLV2548IDWG4?
All TLV2548IDWG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLV2548IDWG4, 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 TLV2548IDWG4 part is unused and in its original packaging.
Return procedure for TLV2548IDWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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