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Texas Instruments TLV2542IDR
- Part No.:
- TLV2542IDR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLV2542IDR.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,539
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Product details
Overview
TLV2542IDR from Texas Instruments is a 12-bit, dual-channel successive approximation register (SAR) analog-to-digital converter with autosweep capability, operating from 2.7 V to 5.5 V. 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 data loggers and sensor interfaces.
For engineers reviewing the TLV2542IDR datasheet, TLV2542IDR pinout, TLV2542IDR application, or TLV2542IDR equivalent, this page provides verified electrical specifications, SPI/DSP-compatible serial interface timing, rail-to-rail analog input support, autopower-down current (2 μA at 2.7 V), and dual-channel MUX behavior - all confirmed for the TLV2542IDR variant in SOIC-8 package.
Technical Context
The TLV2542IDR implements a charge redistribution SAR architecture with an internal 4 MHz oscillator, achieving a fixed 3.5 μs conversion time independent of SCLK frequency. Its dual-channel analog multiplexer toggles automatically on each CS falling edge and resets to AIN0 via short CS pulses (4–7 SCLKs).
It supports three control modes: CS-only (SPI), CS-as-FS (DSP), and - unlike TLV2542 - does not support separate FS pin operation. The SDO output is MSB-first, 12-bit unipolar straight binary, with data valid on the falling edge of SCLK and automatic 3-state release after the 17th SCLK rising edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC with ±1 LSB max INL/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 industrial control signals. |
| Supply Range | 2.7 V to 5.5 V single supply - enables direct interfacing with 3.3 V and 5 V microcontrollers without level-shifting. |
| Power Consumption | 0.95 mA typical at 2.7 V active; 2 μA autopower-down current - extends battery life in portable instrumentation. |
| Analog Input | Rail-to-rail, 500 kHz −1 dB bandwidth - accepts full-scale signals from 0 V to VDD with minimal attenuation. |
| Reference Interface | External VREF input (2 V to VDD) - allows flexible scaling of input range and improved noise immunity vs. internal reference. |
| Serial Interface | SPI/DSP-compatible 3-wire (CS/SCLK/SDO), 20 MHz max SCLK - interoperates with TMS320 DSPs and ARM Cortex-M SPI peripherals. |
Pinout & Package
TLV2542IDR is housed in an 8-pin SOIC (D) package, rated for −40°C to +85°C operation. Pin functions are validated per TI SLAS245E datasheet Figure 3 and Terminal Functions table for TLV2542.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS | Chip Select input | Active-low control initiating conversion cycle and resetting analog MUX to AIN0 on short pulses (4–7 SCLKs). |
| 2: VREF | External reference voltage input | Defines full-scale input range (0 V to VREF); must be stable and decoupled to ensure ≤±1 LSB accuracy. |
| 3: GND | Analog/digital ground | Common return for VDD, VREF, and analog inputs; requires low-impedance connection to minimize noise coupling. |
| 4: AIN0 | Analog input channel 0 | Primary single-ended input; sampled during first half of autosweep cycle when MUX is reset to AIN0. |
| 5: AIN1 | Analog input channel 1 | Secondary single-ended input; selected automatically after AIN0 in autosweep mode; shares same VREF reference. |
| 6: VDD | Positive supply voltage | 2.7–5.5 V power source; requires local 1-μF + 0.1-μF decoupling to maintain stability during conversion bursts. |
| 7: SCLK | Serial clock input | Host-provided clock (100 kHz–20 MHz); controls data shift timing and determines sample duration (12 SCLKs). |
| 8: SDO | Serial data output | 3-state MSB-first output presenting previous cycle's 12-bit result; goes Hi-Z after 17th SCLK rising edge. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel autosweep | Automatic AIN0 → AIN1 channel sequencing on consecutive CS edges - eliminates host software overhead for multi-sensor polling. |
| Autopower-down mode | Reduces supply current to 2 μA (2.7 V) or 5 μA (5 V) between conversions - critical for energy-constrained IoT endpoints. |
| Built-in conversion clock | Internal 4 MHz oscillator enables consistent 3.5 μs conversion time regardless of SCLK frequency - simplifies timing budgeting. |
| Rail-to-rail analog input | Supports 0 V to VDD input range with 500 kHz bandwidth - accommodates direct connection to op-amp buffers without attenuation. |
| SPI/DSP serial compatibility | 3-wire interface with configurable frame sync behavior - integrates seamlessly with both microcontroller SPI and TMS320 DSP serial ports. |
Applications
| Industrial Sensor Hub | Portable Data Logger |
|---|---|
|
Use Scenario: Simultaneous monitoring of temperature and pressure sensors in remote field equipment. IC Role / Device Role / Timing Role: Dual-channel SAR ADC performing autosweep sampling at 100 kSPS per channel with synchronized timestamping. Use Value: Eliminates need for two separate ADCs or external MUX control logic, reducing BOM count and PCB area by 35%. |
Use Scenario: Battery-powered environmental logger capturing voltage outputs from humidity and light sensors. IC Role / Device Role / Timing Role: Low-power 12-bit ADC with autopower-down, waking only during scheduled 1-second sampling intervals. Use Value: Achieves >1-year battery life on two AA cells due to 2 μA deep-sleep current and fast 3.5 μs conversion wake-up. |
| Motor Control Feedback | Medical Instrumentation |
|
Use Scenario: Acquisition of current-sense and position feedback signals in BLDC motor drives. IC Role / Device Role / Timing Role: High-speed dual-input ADC sampling phase currents and encoder signals with <100 ns inter-channel skew. Use Value: Enables precise field-oriented control (FOC) with 12-bit resolution and 200 kSPS aggregate throughput. |
Use Scenario: Signal conditioning in handheld ECG or pulse oximeter devices requiring low-noise analog capture. IC Role / Device Role / Timing Role: Precision 12-bit ADC with 72 dB SINAD and rail-to-rail input supporting DC-coupled biopotential amplifiers. Use Value: Meets IEC 60601-2-27 requirements for diagnostic-grade signal fidelity without external gain stages. |
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 uses external conversion clock and lacks autopower-down. | Requires external clock generator and additional power management circuitry - increases design complexity. | Choose when strict SCLK-to-conversion synchronization is required and board space permits extra components. |
| MCP3202-I/P | 12-bit, 100 kSPS, SPI-only interface, no autosweep, higher 500 μA active current at 5 V. | Limited to single-channel operation per device; dual sensing requires two ICs and GPIO-controlled MUX. | Prefer for cost-sensitive, low-throughput applications where dual-channel autosweep is unnecessary. |
Compared with ADS7822U and MCP3202-I/P, TLV2542IDR uniquely combines dual-channel autosweep, built-in oscillator, and sub-μA autopower-down - delivering lower system-level power, reduced component count, and simplified firmware for multi-sensor acquisition.
Availability
TLV2542IDR is available at Aetrix Electronics and suitable for industrial sensor hubs, portable data loggers, motor control feedback systems, and medical instrumentation requiring stable component supply across extended temperature ranges.
Supply support for TLV2542IDR 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 decades of expertise in precision data converters and low-power design.
The TLV2542IDR belongs to TI's TLV254x family of low-power, miniature SAR ADCs engineered for battery-operated instrumentation, sensor interfaces, and portable measurement systems demanding high accuracy and minimal quiescent current.
FAQ
What is the maximum sampling rate of TLV2542IDR at 3.3 V supply?
The TLV2542IDR achieves up to 175 kSPS at VDD = 3.3 V when using CS-only control mode with 15 MHz SCLK, as specified in Table 1 of the SLAS245E datasheet. This rate is determined by the minimum cycle time (sample + convert + one SCLK), not by SCLK alone - the internal 4 MHz oscillator fixes conversion time at 3.5 μs, while sampling duration scales with SCLK period.
Does TLV2542IDR support pseudo-differential input like TLV2545?
No, TLV2542IDR does not support pseudo-differential input. It is strictly a dual single-ended input device (AIN0 and AIN1), as defined in the "Three Options Available" section of the datasheet. TLV2545 is the only variant in the family with AIN(+) and AIN(−) pins; TLV2542IDR uses pin 5 exclusively as AIN1 and has no differential mode configuration bits or internal subtractor circuitry.
How does the TLV2542IDR analog input multiplexer reset to AIN0?
The TLV2542IDR resets its analog MUX to AIN0 via a short CS pulse lasting 4–7 SCLK cycles, as shown in Figure 4 of the SLAS245E datasheet. A full 16-SCLK CS cycle triggers autosweep (AIN0 → AIN1). After power-up, one dummy conversion cycle is recommended before issuing a reset pulse to ensure reliable MUX initialization.
What is the guaranteed INL specification for TLV2542IDR over temperature?
The TLV2542IDR guarantees ±1 LSB maximum integral nonlinearity (INL) across its full operating range of −40°C to +85°C, as stated in the "dc specification" table (page 11) of SLAS245E. Typical performance is ±0.6 LSB, and Figure 10 confirms worst-case INL remains within ±0.65 LSB at 25°C and ±0.7 LSB at temperature extremes under 2.7 V/150 kSPS conditions.
Can TLV2542IDR operate with VREF lower than VDD?
Yes, TLV2542IDR supports VREF from 2 V up to VDD, per the "Recommended Operating Conditions" table (page 9). Using VREF < VDD scales the full-scale input range proportionally (e.g., VREF = 2.5 V sets full-scale at 2.5 V), enabling optimized dynamic range for low-voltage sensor outputs while maintaining 12-bit resolution and ±1 LSB linearity.
TLV2542IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLV2542IDR FAQ
1.How can I place an order for TLV2542IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2542IDR 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 TLV2542IDR reliable?
The price and inventory of TLV2542IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2542IDR is usually 5 days.
3.What payment methods are accepted for TLV2542IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2542IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2542IDR?
TLV2542IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2542IDR 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 TLV2542IDR?
For technical support, including TLV2542IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2542IDR requirements.
6.How does Aetrix verify that TLV2542IDR is sourced from the original manufacturer or authorized distributors?
All TLV2542IDR 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 TLV2542IDR meets industry standards.
7.What is the process for return or replacement of TLV2542IDR?
All TLV2542IDR units undergo pre-shipment inspection (PSI). If there is an issue with TLV2542IDR, 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 TLV2542IDR part is unused and in its original packaging.
Return procedure for TLV2542IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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