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Texas Instruments TLV2548CPWG4
- Part No.:
- TLV2548CPWG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLV2548CPWG4.pdf
- Description:
- IC ADC 12BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,623
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Product details
Overview
TLV2548CPWG4 from Texas Instruments is a 12-bit, 200-KSPS successive-approximation analog-to-digital converter (ADC) with integrated reference, conversion clock, and 8-deep FIFO. It operates from a single 2.7-V to 5.5-V supply, supports SPI/DSP-compatible serial interface (up to 20-MHz SCLK), and features differential/integral nonlinearity of ±1 LSB for precision data acquisition in industrial sensor interfaces.
For engineers reviewing the TLV2548CPWG4 datasheet, TLV2548CPWG4 pinout, TLV2548CPWG4 application, or TLV2548CPWG4 equivalent, key selection considerations include its 8-channel analog multiplexer, programmable sampling period (12/24 SCLKs or hardware-controlled CSTART), internal 2-V/4-V reference options, and EOC/INT dual-function interrupt pin.
Technical Context
The TLV2548CPWG4 implements a charge-redistribution SAR architecture with break-before-make analog multiplexer for 8 analog inputs and three internal test voltages. Its control logic supports four conversion modes-single-shot, repeat, sweep, and repeat-sweep-with FIFO-triggered interrupt generation at configurable fill levels (1/4, 1/2, 3/4, or full).
Sampling is configurable via software (short/long SCLK-based) or hardware (CSTART pin), with conversion clock selectable as internal OSC, SCLK, SCLK/2, or SCLK/4. The device uses CPOL = 0, CPHA = 0 SPI timing and supports frame sync (FS) for TI DSP interfacing, while maintaining compatibility with microprocessor serial ports.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC with ±1 LSB differential/integral nonlinearity ensures accurate digital representation of analog signals across full scale. |
| Throughput | 200-KSPS maximum sampling rate enables real-time monitoring of fast-changing industrial or motor control signals. |
| SNR + Distortion | 70 dB at 12-kHz input frequency provides sufficient dynamic range for medium-fidelity sensor signal digitization. |
| Analog Input Range | 0 V to VCC (500-kHz bandwidth) allows direct connection to unipolar sensors without external level-shifting circuitry. |
| Supply Voltage | 2.7 V to 5.5 V single supply simplifies power design and supports battery-powered or mixed-voltage embedded systems. |
| Reference Options | Internal 2-V or 4-V reference (REFM tied to GND) or external reference (±10 µF/0.1 µF decoupling) enables flexible accuracy vs. headroom trade-offs. |
| Power Consumption | 1.0 mA at 3.3 V (external ref); 1 µA max in software/hardware/autopower-down mode reduces idle current in energy-sensitive applications. |
Pinout & Package
TLV2548CPWG4 is packaged in a 20-pin TSSOP (PW) with 0.65-mm pitch, RoHS-compliant, and rated for 0°C to 70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDO | Serial Data Output | 3-state MSB-first output; presents conversion result or FIFO content after CS↓ or FS↓, synchronized to SCLK edges per interface mode. |
| SDI | Serial Data Input | Accepts 16-bit command/data frames (4-bit CMR + 12-bit config); latched on rising (SPI) or falling (DSP) SCLK edges depending on FS state. |
| SCLK | Serial Clock Input | Up to 20-MHz clock source; configurable as conversion clock (OSC, SCLK, SCLK/2, SCLK/4) to optimize speed vs. sampling time. |
| EOC/(INT) | End-of-Conversion / Interrupt Output | Programmable as EOC (mode 00 only) or INT (all other modes); falling edge signals ready data for FIFO read or channel reselection. |
| VCC, GND | Power Supply | Single 2.7–5.5-V supply with dedicated analog ground; low-noise layout critical for 70-dB SNR performance. |
| A0–A7 | Analog Input Channels | 8-channel multiplexed inputs; source impedance ≤1 kΩ recommended; CSTART extends sampling for higher-impedance sources. |
| CSTART | Hardware Sampling Control | Asynchronous start/stop of sampling period; low-time defines acquisition window; required for extended sampling in repeat/sweep modes with internal reference. |
| CS | Chip Select | Active-low enable; resets internal counter and enables SDI/SDO; must transition with SCLK low for SPI compliance. |
| FS | Frame Sync Input | DSP interface trigger; resets counter and enables SDI when active low; tie to VCC if unused in microprocessor applications. |
| PWDN | Power-Down Control | Logic-low disables analog and reference circuits; device resumes on next active CS, FS, or CSTART edge. |
| REFP / REFM | Reference Inputs | External reference terminals (10 µF + 0.1 µF decoupling); REFM tied to GND when internal 2-V/4-V reference is selected. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 8× FIFO buffer | Reduces host processor polling overhead by storing up to eight 12-bit results; triggers INT 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) enable automatic multi-sensor scanning without host intervention between conversions. |
| Dual sampling control | Combines software-configurable 12/24-SCLK sampling with hardware CSTART pin for deterministic, source-impedance-agnostic acquisition timing. |
| Built-in reference & clock | Eliminates need for external reference IC or crystal oscillator; internal 2-V/4-V options and OSC reduce BOM count and board space. |
| Low-power operation | 1.0-mA active current at 3.3 V and 1-µA max in power-down mode support battery-backed data loggers and portable instrumentation. |
Applications
| Industrial Process Monitoring | Motor Control Feedback |
|---|---|
|
Use Scenario: Continuous voltage/current sensing from multiple temperature, pressure, and flow transducers in PLC I/O modules. IC Role / Device Role / Timing Role: 8-channel SAR ADC with FIFO and programmable sweep acquires synchronized samples across sensors at 200-KSPS. Use Value: Reduces host CPU load via interrupt-driven FIFO reads and eliminates external multiplexer timing complexity. |
Use Scenario: Real-time acquisition of phase currents and DC bus voltage in 3-phase inverter drives. IC Role / Device Role / Timing Role: High-speed 12-bit ADC with CSTART-controlled sampling captures fast transient waveforms with precise timing alignment. Use Value: Enables accurate field-oriented control (FOC) by delivering low-latency, jitter-free current samples to the MCU. |
| Portable Data Acquisition | Test & Measurement Equipment |
|
Use Scenario: Battery-powered handheld multimeter or environmental logger with multi-sensor inputs. IC Role / Device Role / Timing Role: Low-power 12-bit ADC with software/hardware power-down modes extends operating life between charges. Use Value: Achieves 70-dB SNR and ±1 LSB linearity while consuming only 1.0 mA at 3.3 V, enabling compact form factors. |
Use Scenario: Benchtop oscilloscope front-end or automated test system digitizing analog stimulus responses. IC Role / Device Role / Timing Role: SPI/DSP-compatible ADC with 20-MHz SCLK support interfaces directly to FPGA or DSP controllers. Use Value: Delivers 200-KSPS throughput with built-in reference and clock, reducing external component count and calibration effort. |
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 resolution, no FIFO, 200-KSPS, 2.7–5.5-V supply, SPI-only (no FS), no CSTART pin. | Limited to lower-accuracy applications; lacks multi-channel sweep and hardware sampling control. | Select when cost sensitivity outweighs resolution/FIFO requirements and DSP interface is unnecessary. |
| TLV2544CPW | 4-channel variant of same family; identical architecture, timing, and register map; shares same 16-pin TSSOP package. | Fewer analog inputs; reduced PCB footprint but requires external mux for >4 sensors. | Choose for space-constrained designs with ≤4 analog sources where pin compatibility and firmware reuse are priorities. |
Compared with TLV2548CPWG4, ADS7822U trades resolution and flexibility for lower cost and smaller size, while TLV2544CPW retains full feature parity but halves channel count-making it suitable for scaled-down implementations without redesigning firmware or layout.
Availability
TLV2548CPWG4 is available at Aetrix Electronics and suitable for industrial process monitoring, motor control feedback, portable data acquisition, and test & measurement equipment requiring stable component supply and long-term production continuity.
Supply support for TLV2548CPWG4 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 expertise in precision data converters and industrial-grade ICs.
The TLV2548CPWG4 belongs to TI's TLV254x family of low-power, high-performance SAR ADCs designed specifically for embedded industrial sensing, motor control, and portable instrumentation where integration, accuracy, and power efficiency are critical.
FAQ
What is the maximum sampling rate of the TLV2548CPWG4?
The TLV2548CPWG4 achieves a maximum throughput of 200 KSPS under optimal conditions-using SCLK as the conversion clock source (SCLK/1), short sampling period (12 SCLKs), and internal OSC disabled. At 20-MHz SCLK, conversion time drops to 3.86 µs, enabling this peak rate. Actual sustained rate depends on interface timing, FIFO management, and host processor latency.
Does the TLV2548CPWG4 require an external reference voltage?
No, the TLV2548CPWG4 does not require an external reference voltage. It includes selectable internal references of 2 V or 4 V-activated by setting CFR bit D11 = 1 and tying REFM to GND. External reference operation is optional and supported via REFP/REFM pins with 10-µF + 0.1-µF decoupling, offering greater flexibility for precision applications.
How many analog input channels does the TLV2548CPWG4 support?
The TLV2548CPWG4 supports eight single-ended analog input channels (A0 through A7), selectable via the 4-bit command register. It also integrates three internal test voltages ((REFP+REFM)/2, REFM, and REFP) for self-calibration and diagnostics-accessible through dedicated commands without external signal routing.
What is the function of the CSTART pin on the TLV2548CPWG4?
The CSTART pin on the TLV2548CPWG4 provides hardware-controlled, asynchronous sampling initiation and termination. Its falling edge starts the sampling period; rising edge ends sampling and begins conversion. This enables precise, source-impedance-independent acquisition timing-critical for high-Z sensors-and is required for extended sampling in repeat/sweep modes when using the internal reference.
Can the TLV2548CPWG4 interface directly with a TI DSP processor?
Yes, the TLV2548CPWG4 supports direct interface with TI DSP processors via its FS (frame sync) pin. When FS is used as the active-low trigger, it resets the internal counter and enables SDI, allowing seamless synchronization with DSP serial ports. The device accepts MSB-first data on SCLK falling edges in FS-active mode, matching standard TI DSP timing requirements.
TLV2548CPWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLV2548CPWG4 FAQ
1.How can I place an order for TLV2548CPWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2548CPWG4 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 TLV2548CPWG4 reliable?
The price and inventory of TLV2548CPWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2548CPWG4 is usually 5 days.
3.What payment methods are accepted for TLV2548CPWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2548CPWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2548CPWG4?
TLV2548CPWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2548CPWG4 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 TLV2548CPWG4?
For technical support, including TLV2548CPWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2548CPWG4 requirements.
6.How does Aetrix verify that TLV2548CPWG4 is sourced from the original manufacturer or authorized distributors?
All TLV2548CPWG4 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 TLV2548CPWG4 meets industry standards.
7.What is the process for return or replacement of TLV2548CPWG4?
All TLV2548CPWG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLV2548CPWG4, 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 TLV2548CPWG4 part is unused and in its original packaging.
Return procedure for TLV2548CPWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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