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Texas Instruments TLV2542CDGKR
- Part No.:
- TLV2542CDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TLV2542CDGKR.pdf
- Description:
- IC ADC 12BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,030
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Product details
Overview
TLV2542CDGKR from Texas Instruments is a 12-bit, dual-channel successive approximation register (SAR) analog-to-digital converter with autosweep capability, operating from a single 2.7-V to 5.5-V supply. It delivers up to 200 kSPS throughput, ±1 LSB INL/DNL accuracy, and 72 dB SINAD at 20 kHz input frequency, targeting precision sensor signal acquisition in battery-powered industrial monitoring systems.
For engineers reviewing the TLV2542CDGKR datasheet, TLV2542CDGKR pinout, TLV2542CDGKR application, or TLV2542CDGKR equivalent, key selection considerations include its dual-channel autosweep mode, rail-to-rail 500 kHz analog input bandwidth, autopower-down current of 2 µA (at 2.7 V), SPI/DSP-compatible serial interface, and MSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The TLV2542CDGKR implements a charge redistribution SAR architecture with an integrated conversion clock oscillator (3.5 µs conversion time), eliminating external timing components. Its dual-input multiplexer toggles automatically between AIN0 and AIN1 on successive CS cycles, enabling synchronized sampling without host processor intervention.
Control is exclusively via the CS pin - no FS pin is used - supporting direct SPI microcontroller interfacing with CPOL = 0 and CPHA = 1 configuration. The device uses unipolar straight-binary output format (000h = GND, FFFh = VREF − 1 LSB) and requires an external reference applied to VREF, with input range bounded by GND and VDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC: delivers 4096 discrete digital codes for high-fidelity analog signal digitization. |
| Max Throughput | 200 kSPS at VDD = 4.5–5.5 V: supports real-time sampling of fast-changing sensor outputs (e.g., vibration, audio envelope). |
| INL / DNL | ±1 LSB max: ensures monotonicity and <0.025% full-scale linearity error for calibrated measurement systems. |
| SINAD | 72 dB at fi = 20 kHz, VDD = VREF = 5.5 V: enables >11.8 effective bits of dynamic resolution in noise-sensitive applications. |
| Supply Range | 2.7 V to 5.5 V single supply: simplifies power design and supports direct connection to Li-ion, 3.3 V, or 5 V rails. |
| Autopower-Down | 2 µA at 2.7 V: reduces quiescent current by >500× during idle intervals, extending battery life in portable instrumentation. |
| Analog BW | 500 kHz (−1 dB): accommodates anti-aliasing filter design with sufficient margin for 100-kHz signal content. |
Pinout & Package
TLV2542CDGKR is housed in an 8-pin MSOP (DGK) package - 3.0 mm × 3.0 mm × 1.0 mm body, 0.65 mm pitch - optimized for compact, high-density PCB layouts in portable and embedded systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low control initiating conversion cycle and releasing SDO from high-impedance; falling edge resets MUX to AIN0 if pulse ≤7 SCLKs, toggles channel if longer. |
| VREF (Pin 2) | Reference Voltage Input | External voltage (2 V to VDD) sets full-scale range; determines LSB size (VREF/4096) and defines analog input compliance limits. |
| GND (Pin 3) | Analog/Digital Ground | Common return for internal circuitry and reference; must be low-impedance and separated from noisy digital ground in mixed-signal layouts. |
| AIN0 (Pin 4) | Analog Input Channel 0 | Primary single-ended input; sampled during first conversion cycle after power-up or MUX reset; rail-to-rail capable. |
| AIN1 (Pin 5) | Analog Input Channel 1 | Secondary single-ended input; automatically selected on second CS cycle in autosweep mode; identical electrical specs to AIN0. |
| SCLK (Pin 7) | Serial Clock Input | Host-provided clock (100 kHz–20 MHz) synchronizing data transfer; controls sampling timing and SDO output validity edges. |
| VDD (Pin 6) | Positive Supply | Single 2.7–5.5 V supply powering analog core, digital logic, and reference buffer; requires local 1-µF + 0.1-µF decoupling. |
| SDO (Pin 8) | Serial Data Output | 3-state MSB-first output presenting 12-bit result (D11–D0) aligned to SCLK falling edges; high-impedance when CS is high. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel autosweep | Automatic AIN0/AIN1 alternation per CS cycle eliminates software polling overhead and ensures deterministic interleaved sampling. |
| Rail-to-rail analog input | Supports full-scale signals from GND to VDD without external level-shifting, simplifying front-end design for unipolar sensors. |
| Built-in conversion clock | Internal oscillator enables fixed 3.5 µs conversion time independent of SCLK stability - critical for jitter-sensitive measurements. |
| SPI/DSP serial interface | 3-wire (CS/SCLK/SDO) protocol compatible with standard microcontroller SPI peripherals and TMS320 DSP frame sync modes. |
| Low-power autopower-down | 2 µA shutdown current at 2.7 V allows rapid entry/exit from low-power state between conversions - ideal for duty-cycled sensing. |
Applications
| Industrial Sensor Monitoring | Portable Data Loggers |
|---|---|
|
Use Scenario: Continuous acquisition of temperature, pressure, and humidity sensor outputs in factory-floor condition monitoring units. IC Role / Device Role / Timing Role: Dual-channel SAR ADC performing synchronized autosweep sampling at 100 kSPS to capture correlated multi-sensor transients. Use Value: Eliminates need for two separate ADCs or multiplexed single-channel designs, reducing BOM count and layout area while maintaining channel-to-channel timing coherence. |
Use Scenario: Battery-powered environmental logging in remote field deployments requiring multi-day operation on coin-cell or LiPo batteries. IC Role / Device Role / Timing Role: Low-quiescent-current ADC entering 2 µA autopower-down between 1-second sampling intervals to minimize average system current. Use Value: Extends operational lifetime by >3× compared to non-autopower-down 12-bit ADCs, directly enabling maintenance-free deployment. |
| Motor Control Feedback | Medical Instrumentation |
|
Use Scenario: Acquisition of current-sense and position feedback signals in BLDC motor drives for closed-loop commutation and fault detection. IC Role / Device Role / Timing Role: High-speed 200 kSPS ADC capturing phase current waveforms with 500 kHz analog bandwidth and minimal latency. Use Value: Enables accurate real-time current reconstruction and overcurrent response within <5 µs, improving torque ripple suppression and safety margins. |
Use Scenario: Signal conditioning in handheld ECG or pulse oximetry devices where size, power, and signal fidelity are tightly constrained. IC Role / Device Role / Timing Role: Precision 12-bit ADC delivering 72 dB SINAD for clean biopotential waveform digitization at clinically relevant bandwidths. Use Value: Meets IEC 60601-2-27 requirements for diagnostic-grade signal integrity without external op-amp buffering or calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit, 200 kSPS, single-supply 2.7–5.25 V, but only single-channel with external MUX required for dual inputs. | Lacks native autosweep; requires additional analog switch and timing control logic to emulate TLV2542CDGKR behavior. | Select when board space permits external MUX and firmware can manage channel sequencing. |
| MCP3202-I/P | 12-bit, 100 kSPS, 2.7–5.5 V, dual-channel but no autosweep - channels selected via dedicated address bit in SPI command. | Requires explicit SPI command per channel; introduces software-induced inter-channel delay variability not present in TLV2542CDGKR autosweep. | Select when deterministic channel timing is less critical than lowest-cost dual-channel solution in through-hole assembly. |
Compared with ADS7822U and MCP3202-I/P, TLV2542CDGKR uniquely integrates hardware-based autosweep, eliminating external components and firmware complexity for dual-channel acquisition - making it optimal for space- and power-constrained real-time monitoring where channel synchronization and minimal BOM are essential.
Availability
TLV2542CDGKR is available at Aetrix Electronics and suitable for industrial sensor monitoring, portable data loggers, motor control feedback, and medical instrumentation requiring stable component supply across extended production lifecycles.
Supply support for TLV2542CDGKR 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 low-power design.
The TLV2542CDGKR belongs to TI's TLV254x family of low-power, miniature SAR ADCs engineered for battery-operated and space-constrained measurement systems demanding high accuracy without sacrificing efficiency.
FAQ
What is the maximum sampling rate of the TLV2542CDGKR and under what conditions?
The TLV2542CDGKR achieves a maximum throughput of 200 kSPS when operated at VDD = 4.5 V to 5.5 V with SCLK up to 20 MHz. At 2.7 V supply, the maximum rate drops to 140 kSPS due to internal timing constraints. This performance is enabled by its built-in oscillator and optimized SAR architecture - no external clock is needed for conversion timing.
How does the autosweep function work on the TLV2542CDGKR?
The TLV2542CDGKR's autosweep toggles the analog input channel between AIN0 and AIN1 on each falling edge of CS. A short CS pulse (4–7 SCLKs) resets the MUX to AIN0; a full 16-SCLK conversion cycle advances it to AIN1. This hardware-controlled sequencing eliminates software overhead and ensures precise inter-channel timing alignment - a feature not replicated in most competing dual-channel ADCs.
Does the TLV2542CDGKR require an external reference voltage?
Yes, the TLV2542CDGKR requires an external reference voltage applied to the VREF pin, ranging from 2 V to VDD. The reference sets the full-scale input range and directly determines LSB size (VREF/4096). Unlike some integrated-reference ADCs, TLV2542CDGKR offers flexibility to use precision external references (e.g., REF5025) for metrology-grade accuracy or cost-optimized internal bandgap sources via external buffering.
What package type is used for the TLV2542CDGKR and what are its layout advantages?
The TLV2542CDGKR uses an 8-pin MSOP (DGK) package measuring 3.0 mm × 3.0 mm × 1.0 mm with 0.65 mm lead pitch. Its small footprint and exposed thermal pad (though not electrically connected in this variant) enable high-density routing in portable and wearable electronics. The pinout separates analog (AIN0/AIN1/VREF/GND) and digital (CS/SCLK/SDO/VDD) sections to simplify noise isolation and ground partitioning.
Can the TLV2542CDGKR interface directly with a standard SPI microcontroller?
Yes, the TLV2542CDGKR supports direct SPI interface using CS, SCLK, and SDO pins only - no FS pin required. It operates in CPOL = 0 / CPHA = 1 mode: data is sampled on the falling edge of SCLK, and the MSB appears on SDO immediately after CS goes low. This matches common microcontroller SPI configurations (e.g., STM32, MSP430, PIC) without protocol translation or glue logic.
TLV2542CDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 2
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLV2542CDGKR FAQ
1.How can I place an order for TLV2542CDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2542CDGKR 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 TLV2542CDGKR reliable?
The price and inventory of TLV2542CDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2542CDGKR is usually 5 days.
3.What payment methods are accepted for TLV2542CDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2542CDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2542CDGKR?
TLV2542CDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2542CDGKR 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 TLV2542CDGKR?
For technical support, including TLV2542CDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2542CDGKR requirements.
6.How does Aetrix verify that TLV2542CDGKR is sourced from the original manufacturer or authorized distributors?
All TLV2542CDGKR 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 TLV2542CDGKR meets industry standards.
7.What is the process for return or replacement of TLV2542CDGKR?
All TLV2542CDGKR units undergo pre-shipment inspection (PSI). If there is an issue with TLV2542CDGKR, 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 TLV2542CDGKR part is unused and in its original packaging.
Return procedure for TLV2542CDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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