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Texas Instruments TLV2542ID
- Part No.:
- TLV2542ID
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLV2542ID.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,679
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Product details
Overview
TLV2542ID 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. Designed for low-power embedded data acquisition, it integrates a built-in conversion clock and supports SPI/DSP-compatible serial interface in an 8-pin SOIC package.
For engineers reviewing the TLV2542ID datasheet, TLV2542ID pinout, TLV2542ID application, or TLV2542ID equivalent, key selection considerations include its dual-channel autosweep operation, rail-to-rail 500 kHz analog input bandwidth, autopower-down current of 2 μA (at 2.7 V), and compatibility with microcontroller SPI or TMS320 DSP frame-sync interfaces.
Technical Context
The TLV2542ID implements a charge redistribution SAR architecture with internal oscillator-based conversion clock (3.5 μs conversion time). Its dual-input multiplexer toggles automatically between AIN0 and AIN1 on successive CS cycles, enabling seamless channel scanning without host software intervention.
Control logic supports three interface modes: CS-only (SPI), CS-as-FS (DSP), or combined CS/FS (TLV2541 only). For TLV2542ID, all control is via CS; FS is not implemented. The device enters autopower-down immediately after conversion completion, achieving 2 μA (2.7 V) or 5 μA (5 V) quiescent current within 0.5 μs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC with unipolar straight-binary output (000h to FFFh) |
| Throughput Rate | Up to 200 kSPS at VDD = 4.5–5.5 V; 140 kSPS at VDD = 2.7 V - defines maximum sampling rate per channel in autosweep mode |
| INL / DNL | ±1 LSB max - ensures monotonicity and ≤0.024% full-scale linearity error for precision sensor interfacing |
| SINAD / SFDR | 72 dB / 85 dB at fi = 20 kHz - supports high-fidelity signal capture in anti-aliasing-limited applications |
| Supply Range | 2.7 V to 5.5 V single supply - enables direct interfacing with 3.3 V or 5 V microcontrollers and sensors |
| Analog Input BW | Rail-to-rail, 500 kHz (−1 dB) - accommodates wideband transducer outputs without external buffering |
| Autopower-Down | 2 μA at 2.7 V (0.5 μs wake-up) - reduces average power in burst-mode acquisition systems |
Pinout & Package
TLV2542ID is housed in an 8-pin SOIC (D) package, measuring 3.91 mm × 4.9 mm × 1.75 mm (JEDEC MS-012), rated for −40°C to +85°C industrial temperature range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | Chip Select Input | Active-low control initiating conversion cycle and resetting analog MUX to AIN0 when pulse duration is 4–7 SCLKs; toggles to AIN1 for longer pulses |
| 2 - VREF | External Reference Input | Defines full-scale range (2 V to VDD); sets LSB = VREF/4096; requires decoupling for noise-sensitive applications |
| 3 - GND | Analog/Digital Ground | Common return for internal circuitry; must be low-impedance connection to minimize ground bounce in mixed-signal layouts |
| 4 - AIN0 | Analog Input Channel 0 | Primary single-ended input; sampled during first conversion cycle after power-up or MUX reset |
| 5 - AIN1 | Analog Input Channel 1 | Secondary single-ended input; selected automatically on next CS falling edge after AIN0 conversion |
| 6 - VDD | Positive Supply Voltage | 2.7–5.5 V single supply powering analog core, digital interface, and internal oscillator |
| 7 - SCLK | Serial Clock Input | Host-provided clock (100 kHz–20 MHz); controls data shift timing and determines sample period (12 SCLKs) |
| 8 - SDO | Serial Data Output | 3-state MSB-first output presenting previous cycle's 12-bit result; high-impedance when CS is high |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel autosweep | Hardware-managed AIN0/AIN1 alternation eliminates CPU overhead for multi-channel polling |
| Built-in conversion clock | Internal 4+ MHz oscillator enables fixed 3.5 μs conversion time - no external timing components required |
| SPI/DSP serial interface | 3-wire CS/SCLK/SDO with MSB-first format and configurable frame sync - interoperable with STM32, MSP430, and C2000 DSPs |
| Rail-to-rail analog input | Supports 0 V to VDD input range with 500 kHz bandwidth - simplifies front-end design for DC-coupled sensors |
| Low-power autopower-down | 2 μA shutdown current at 2.7 V with sub-microsecond wake-up - ideal for battery-powered data loggers |
Applications
| Industrial Sensor Monitoring | Portable Medical Instrumentation |
|---|---|
|
Use Scenario: Continuous monitoring of temperature, pressure, and humidity sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Dual-channel SAR ADC acquiring synchronized samples from two transducers with hardware autosweep and minimal host intervention. Use Value: Reduces firmware complexity and CPU load by eliminating manual channel switching; 12-bit resolution meets IEC 61000-4-3 immunity requirements for industrial analog inputs. |
Use Scenario: Battery-powered ECG front-end capturing lead I and II signals in handheld diagnostic devices. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail ADC digitizing differential biopotential waveforms with 200 kSPS aggregate throughput. Use Value: Autopower-down cuts average current to <5 μA during inter-beat intervals, extending AA battery life beyond 12 months. |
| Energy Metering Subsystem | Motor Control Feedback Loop |
|
Use Scenario: Sampling voltage and current transformers in Class 0.5 smart electricity meters. IC Role / Device Role / Timing Role: Precision 12-bit converter providing simultaneous voltage/current snapshots for real-time RMS and harmonic analysis. Use Value: ±1 LSB INL ensures <0.1% metering error across temperature; 72 dB SINAD supports accurate THD calculation up to 21st harmonic. |
Use Scenario: Closed-loop position/speed sensing in BLDC motor drives using hall-effect and back-EMF signals. IC Role / Device Role / Timing Role: High-speed dual-input ADC feeding real-time current and voltage feedback to PWM controller. Use Value: 3.5 μs conversion time enables <5 μs control loop latency; 500 kHz analog BW captures fast transient responses during commutation. |
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, no autopower-down, 3 V only | Limited to lower-precision applications like basic threshold detection; lacks rail-to-rail input and temperature range | Select when cost sensitivity outweighs resolution needs and system operates exclusively at 3 V |
| TLV2544ID | 4-channel variant (vs. TLV2542ID's 2-channel), same 12-bit/200 kSPS spec, identical SOIC-8 package | Enables expansion to four analog inputs without layout change; requires updated firmware for channel sequencing | Choose for future-proofing or immediate need for >2 channels; pin-compatible with shared PCB footprint |
Compared with ADS7822U, TLV2542ID provides 4× higher resolution and integrated power management; compared with TLV2544ID, it offers lower channel count but reduced channel-to-channel crosstalk and simpler firmware integration for dual-sensor systems.
Availability
TLV2542ID is available at Aetrix Electronics and suitable for industrial sensor monitoring, portable medical instrumentation, energy metering subsystems, and motor control feedback loops requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLV2542ID 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 TLV254x family was engineered for space-constrained, battery-aware systems needing high-resolution analog sensing without sacrificing speed or power efficiency - targeting industrial automation, medical devices, and energy infrastructure.
FAQ
What is the maximum sampling rate achievable with TLV2542ID in dual-channel autosweep mode?
The TLV2542ID achieves up to 200 kSPS aggregate throughput at VDD = 4.5–5.5 V, meaning each channel can be sampled at up to 100 kSPS in alternating sequence. At 2.7 V, the maximum rate drops to 140 kSPS aggregate (70 kSPS per channel). This is determined by internal timing constraints and SCLK frequency limits specified in Table 1 of the SLAS245E datasheet.
Does TLV2542ID support pseudo-differential input like TLV2545?
No, TLV2542ID does not support pseudo-differential input. It is strictly a dual single-ended input device (AIN0 and AIN1), as confirmed by its functional block diagram, terminal functions table, and device description. Only TLV2545 provides AIN(+) and AIN(−) pins for pseudo-differential operation; TLV2542ID uses both inputs independently in single-ended mode.
How does the TLV2542ID analog input multiplexer reset to AIN0?
The TLV2542ID MUX resets to AIN0 when CS is pulsed low for 4–7 SCLK cycles - a "short active CS cycle" as defined in the timing section. A longer CS low time (>7 SCLKs) causes automatic toggling to AIN1. One dummy conversion cycle is recommended after power-up before attempting a reset, ensuring reliable initialization of the channel state.
Can TLV2542ID operate with a 3.3 V supply and 2.5 V reference voltage?
Yes, TLV2542ID supports VDD = 3.3 V and VREF = 2.5 V within its recommended operating conditions (VREF min = 2 V, VDD min = 2.7 V). This configuration yields an LSB size of 2.5 V / 4096 ≈ 610 μV and maintains full AC performance specifications including 72 dB SINAD, provided proper decoupling and layout practices are followed.
Is the TLV2542ID pin-compatible with other devices in the TLV254x family?
TLV2542ID shares the same 8-pin SOIC (D) package and pinout with TLV2541ID and TLV2545ID, making them physically interchangeable on PCBs. However, functional differences exist: TLV2541ID is single-channel, TLV2545ID is pseudo-differential, and TLV2542ID is dual-channel autosweep. Firmware and signal routing must be validated per device function.
TLV2542ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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:
- -
TLV2542ID FAQ
1.How can I place an order for TLV2542ID through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2542ID 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 TLV2542ID reliable?
The price and inventory of TLV2542ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2542ID is usually 5 days.
3.What payment methods are accepted for TLV2542ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2542ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2542ID?
TLV2542ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2542ID 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 TLV2542ID?
For technical support, including TLV2542ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2542ID requirements.
6.How does Aetrix verify that TLV2542ID is sourced from the original manufacturer or authorized distributors?
All TLV2542ID 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 TLV2542ID meets industry standards.
7.What is the process for return or replacement of TLV2542ID?
All TLV2542ID units undergo pre-shipment inspection (PSI). If there is an issue with TLV2542ID, 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 TLV2542ID part is unused and in its original packaging.
Return procedure for TLV2542ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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