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Texas Instruments TLV2542IDGKR
- Part No.:
- TLV2542IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TLV2542IDGKR.pdf
- Description:
- IC ADC 12BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,714
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Product details
Overview
TLV2542IDGKR from Texas Instruments is a 12-bit, dual-channel SAR analog-to-digital converter with autosweep capability, operating from 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, enabling high-fidelity signal acquisition in battery-powered sensor interfaces and industrial data loggers.
For engineers reviewing the TLV2542IDGKR datasheet, TLV2542IDGKR pinout, TLV2542IDGKR application, or TLV2542IDGKR equivalent, key selection considerations include its dual-channel autosweep operation, rail-to-rail 500 kHz analog input bandwidth, autopower-down current of 2 µA (2.7 V), MSOP-8 package compatibility, and SPI/DSP serial interface timing requirements.
Technical Context
The TLV2542IDGKR implements a successive approximation register (SAR) architecture with charge redistribution DAC and an integrated 4 MHz conversion clock, achieving a fixed 3.5 µs conversion time independent of SCLK frequency. Its dual-channel analog multiplexer toggles between AIN0 and AIN1 on each CS falling edge, with MUX reset capability via short CS pulses (4–7 SCLKs).
It supports three control modes: CS-only (SPI-compatible), CS-as-FS (TMS320 DSP interface), and dual CS/FS (TLV2541 only - not applicable). The device uses unipolar straight-binary output format (OD11–OD0), requires external VREF for full-scale definition, and features rail-to-rail analog input with 20 pF input capacitance and 600 Ω on-resistance at 2.7 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC with ±1 LSB INL and ±1 LSB DNL - ensures monotonicity and <0.025% full-scale linearity error across temperature. |
| Throughput Rate | Up to 200 kSPS at VDD = 4.5–5.5 V - supports real-time sampling of audio-band and control-loop signals without aliasing. |
| Analog Input | Rail-to-rail dual single-ended inputs (AIN0/AIN1), 500 kHz −1 dB bandwidth - accommodates DC-coupled sensors and fast transients without external amplification. |
| Power Consumption | 0.95 mA typical at 2.7 V active; 2 µA autopower-down current - enables >1-year battery life in intermittent-sampling IoT nodes. |
| Serial Interface | SPI/DSP-compatible 3-wire interface (CS, SCLK, SDO), MSB-first, 16-clock cycle per conversion - interoperable with MSP430, C2000, and TMS320C5x/DSP56K families. |
| Reference Input | External VREF (2 V to VDD), 20–25 kΩ dynamic impedance during conversion - requires low-noise, stable reference (e.g., REF3025) for ≤0.5 LSB drift. |
| Operating Temperature | −40°C to +85°C - qualified for industrial automation, motor control, and automotive body electronics environments. |
Pinout & Package
TLV2542IDGKR is housed in an 8-pin MSOP (DGK) package, 3.0 mm × 3.0 mm × 1.0 mm, with exposed thermal pad (not electrically connected). Pinout follows TI standard DGK footprint and is fully compatible with SOIC-8 PCB footprints using adapter layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | Chip Select / Frame Sync Input | Active-low digital control: falling edge initiates sampling; duration determines MUX channel reset (≤7 SCLKs → AIN0) or toggle (≥8 SCLKs → AIN1). |
| 2 - VREF | External Reference Voltage Input | Defines full-scale range (0 V to VREF); must be decoupled with 0.1 µF ceramic; impedance varies from 100 MΩ (static) to 25 kΩ (active). |
| 3 - GND | Analog and Digital Ground | Single ground return for internal SAR, logic, and reference circuitry; requires low-impedance connection to system AGND plane. |
| 4 - AIN0 | Analog Input Channel 0 | Primary single-ended input; rail-to-rail capable; 20 pF input capacitance necessitates source impedance ≤500 Ω for <0.5 LSB settling error. |
| 5 - AIN1 | Analog Input Channel 1 | Secondary single-ended input; shares same SAR core and timing as AIN0; autoswept after AIN0 in consecutive conversions. |
| 6 - VDD | Positive Supply Voltage | 2.7 V to 5.5 V operation; requires 1 µF + 0.1 µF local decoupling; power-supply rejection ratio (PSRR) is 70 dB at 1 kHz. |
| 7 - SCLK | Serial Clock Input | Accepts 100 kHz–20 MHz clock; duty cycle tolerance 40/60%; rising edge samples control signals, falling edge clocks SDO data. |
| 8 - SDO | Serial Data Output | 3-state, MSB-first, 12-bit result (OD11–OD0) padded with 4 don't-care bits; valid on first falling SCLK after CS fall; Hi-Z after 17th SCLK edge. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel autosweep with MUX reset | Eliminates need for external analog switches or microcontroller GPIO sequencing - automatic AIN0→AIN1 alternation simplifies firmware for dual-sensor monitoring. |
| Built-in conversion clock | Removes dependency on precise external clock source; 3.5 µs fixed conversion time enables deterministic timing for real-time control loops. |
| Rail-to-rail analog input | Supports direct connection to op-amp outputs, thermistor dividers, and current-sense amplifiers without level-shifting circuitry. |
| Autopower-down mode | Reduces quiescent current to 2 µA (2.7 V) between conversions - critical for energy harvesting and coin-cell applications. |
| SPI/DSP serial interface | Compatible with industry-standard microcontroller SPI peripherals (CPOL = 0, CPHA = 1) and TMS320 frame-sync protocols - no custom driver required. |
Applications
| Industrial Sensor Hub | Portable Data Logger |
|---|---|
|
Use Scenario: Simultaneous monitoring of temperature and pressure in factory-floor PLC I/O modules. IC Role / Device Role / Timing Role: Dual-channel SAR ADC acquiring synchronized samples from two isolated RTD/bridge sensors at 100 kSPS, with autosweep eliminating inter-channel skew. Use Value: Reduces BOM count by replacing two single-channel ADCs; 500 kHz input bandwidth captures transient overpressure events without aliasing. |
Use Scenario: Battery-powered environmental logger recording humidity and light intensity every 10 seconds over 12 months. IC Role / Device Role / Timing Role: Low-power ADC entering autopower-down (2 µA) between triggered conversions, waking on MCU GPIO pulse to sample both channels. Use Value: Extends CR2032 battery life beyond 4000 cycles; rail-to-rail input accepts direct output from photodiode transimpedance amplifier. |
| Motor Control Feedback | Medical Vital Sign Monitor |
|
Use Scenario: Acquisition of phase current and bus voltage in BLDC inverter gate-driver boards. IC Role / Device Role / Timing Role: High-speed dual sampling (200 kSPS) capturing current zero-crossings and DC-link ripple within single PWM period. Use Value: 72 dB SINAD ensures accurate current reconstruction for field-oriented control; 3.5 µs conversion enables sub-microsecond latency. |
Use Scenario: Portable ECG front-end digitizing lead-I and lead-II differential signals with baseline restoration. IC Role / Device Role / Timing Role: Dual-channel ADC sampling biopotential electrodes at 250 SPS with oversampling and digital filtering in host MCU. Use Value: ±1 LSB INL preserves diagnostic waveform fidelity; 2.7 V operation matches low-voltage lithium-polymer battery discharge profile. |
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 | 8-bit resolution, 200 kSPS, SPI interface, 2.7–5.25 V supply, no autopower-down | Limited to lower-precision control feedback (e.g., fan speed, basic temp sensing); lacks deep sleep for battery use | Select when cost sensitivity outweighs resolution needs and continuous sampling is acceptable. |
| ADS8320EB | 16-bit resolution, 100 kSPS, SPI interface, 2.7–5.25 V, 1.5 mW active power, no autosweep | Higher precision but halved throughput; requires external MUX or dual ADC configuration for two channels | Choose for high-accuracy medical or test equipment where dual-channel simultaneity is not mandatory. |
Compared with ADS7822U and ADS8320EB, TLV2542IDGKR uniquely balances 12-bit precision, dual-channel autosweep, and 2 µA autopower-down - making it optimal for space-constrained, battery-operated industrial and portable systems requiring moderate resolution and deterministic channel sequencing.
Availability
TLV2542IDGKR is available at Aetrix Electronics and suitable for industrial sensor hubs, portable data loggers, and motor control feedback systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TLV2542IDGKR 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 TLV2542IDGKR belongs to TI's TLV254x family of low-power, miniature SAR ADCs engineered for battery-operated instrumentation, industrial process control, and portable medical devices demanding high accuracy and minimal quiescent current.
FAQ
What is the maximum sampling rate of the TLV2542IDGKR?
The TLV2542IDGKR achieves up to 200 kSPS at VDD = 4.5–5.5 V in CS-only mode with 20 MHz SCLK. At 2.7 V, maximum throughput drops to 175 kSPS. This rate applies to single-channel operation; dual-channel autosweep maintains the same aggregate rate, alternating between AIN0 and AIN1 per conversion cycle. The internal 4 MHz oscillator fixes conversion time at 3.5 µs regardless of SCLK frequency.
Does TLV2542IDGKR support pseudo-differential input like TLV2545?
No, TLV2542IDGKR does not support pseudo-differential input. It is strictly a dual single-ended ADC with dedicated AIN0 and AIN1 pins. The TLV2545 variant provides pseudo-differential operation using AIN(+) and AIN(−) pins, while TLV2542IDGKR's pin 5 is AIN1 - a true second single-ended input. Attempting pseudo-differential connection on TLV2542IDGKR will result in incorrect conversion results and potential input stage saturation.
How does the MUX reset function work on TLV2542IDGKR?
The TLV2542IDGKR resets its analog input multiplexer to AIN0 when CS is held low for 4–7 SCLK cycles - shorter than a full conversion (16+ SCLKs). A longer CS pulse (>7 SCLKs) causes the MUX to toggle to AIN1. This allows firmware to force AIN0 sampling before a measurement sequence. After power-up, one dummy conversion is recommended before relying on MUX state, as initial channel selection is undefined.
What is the minimum external reference voltage for TLV2542IDGKR?
The minimum external reference voltage for TLV2542IDGKR is 2 V, per TI's recommended operating conditions. Using VREF < 2 V violates specification and degrades INL/DNL performance, increases gain error, and may cause code transitions to compress below 2 V full-scale. For 12-bit resolution, VREF ≥ 2.5 V is strongly advised to maintain ≥0.6 LSB effective step size and minimize quantization noise impact on SNR.
Can TLV2542IDGKR operate with a 1.8-V digital interface?
No, TLV2542IDGKR does not support 1.8-V digital I/O. Its absolute maximum digital input voltage is VDD + 0.3 V, and VIH minimum is 2.1 V at VDD = 5.5 V or 0.7×VDD across the range. With VDD = 2.7 V, VIH must exceed 1.89 V. Direct connection to 1.8-V microcontrollers requires level-shifting on CS, SCLK, and SDO lines - TI recommends using SN74LVC1T45 or similar bidirectional translators to avoid logic misreads or damage.
TLV2542IDGKR 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:
- Active
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLV2542IDGKR FAQ
1.How can I place an order for TLV2542IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2542IDGKR 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 TLV2542IDGKR reliable?
The price and inventory of TLV2542IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2542IDGKR is usually 5 days.
3.What payment methods are accepted for TLV2542IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2542IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2542IDGKR?
TLV2542IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2542IDGKR 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 TLV2542IDGKR?
For technical support, including TLV2542IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2542IDGKR requirements.
6.How does Aetrix verify that TLV2542IDGKR is sourced from the original manufacturer or authorized distributors?
All TLV2542IDGKR 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 TLV2542IDGKR meets industry standards.
7.What is the process for return or replacement of TLV2542IDGKR?
All TLV2542IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with TLV2542IDGKR, 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 TLV2542IDGKR part is unused and in its original packaging.
Return procedure for TLV2542IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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