Texas Instruments TLV2541ID

Overview

TLV2541ID from Texas Instruments is a 12-bit, single-channel, successive-approximation analog-to-digital converter (SAR ADC) operating from 2.7 V to 5.5 V. It delivers up to 200 kSPS throughput with ±1 LSB INL/DNL, 72 dB SINAD at 20 kHz, and rail-to-rail analog input bandwidth of 500 kHz. It integrates a built-in conversion clock and supports SPI/DSP-compatible serial interface for microcontroller and TMS320 DSP interfacing in portable instrumentation and sensor signal conditioning.

For engineers reviewing the TLV2541ID datasheet, TLV2541ID pinout, TLV2541ID application, or TLV2541ID equivalent, key selection considerations include its industrial temperature range (−40°C to +85°C), autopower-down current as low as 2 μA at 2.7 V, 8-pin SOIC package, and compatibility with unipolar straight-binary output format using external reference voltage.

Technical Context

The TLV2541ID implements a charge redistribution SAR architecture with internal oscillator-based conversion clock (3.5 μs conversion time). Its control logic accepts chip-select (CS)-only mode for SPI hosts or CS/FS dual-mode for TMS320 DSP synchronization, enabling flexible host interface timing without external clock generation.

It features rail-to-rail analog input with 500 kHz full-power bandwidth and supports external reference voltage (2 V to VDD) applied at VREF. Autopower-down activates automatically after conversion completion, reducing supply current to 2 μA (2.7 V) or 5 μA (5 V) within 0.5 μs - critical for battery-powered data acquisition systems requiring low quiescent power between samples.

Key Specifications

Pinout & Package

TLV2541ID is housed in an 8-pin SOIC (D) package, measuring 3.91 mm × 4.9 mm × 1.75 mm, with standard JEDEC MS-012AC footprint and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit SAR ADC applications.

Compared with ADS7822U and MAX11131AUT+T, TLV2541ID uniquely combines industrial temperature rating, integrated conversion clock, DSP-compatible FS pin, and sub-5-μA autopower-down - making it optimal for rugged, low-power, mixed-host-interface applications.

Availability

TLV2541ID is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and medical device designs requiring stable component supply across −40°C to +85°C ambient conditions.

Supply support for TLV2541ID 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 ADC innovation.

The TLV2541ID belongs to TI's low-power SAR ADC product line, engineered for portable and battery-operated systems demanding high resolution, precision, and ultra-low standby current without sacrificing speed or interface flexibility.

FAQ

What is the maximum sampling rate of the TLV2541ID under industrial temperature conditions?

The TLV2541ID achieves up to 200 kSPS at VDD = 4.5–5.5 V and TA = −40°C to +85°C, as confirmed in Table 1 of the SLAS245E datasheet. At 2.7 V supply, throughput drops to 175 kSPS. This performance is maintained across the full industrial temperature range without derating, thanks to on-chip oscillator calibration and robust SAR architecture.

Does the TLV2541ID require an external clock for conversion timing?

No, the TLV2541ID does not require an external clock for conversion timing. It incorporates a built-in oscillator that generates the internal conversion clock, ensuring a fixed 3.5-μs conversion time regardless of SCLK frequency or jitter. The SCLK only governs serial data transfer and sample timing - not the core ADC conversion process.

Can the TLV2541ID operate with a 2.7-V supply and still meet its specified AC performance?

Yes, the TLV2541ID maintains full AC specifications at 2.7 V: SINAD is 71 dB (typical), SFDR is −84 dB (min), and ENOB is 11.6 bits at 150 kSPS and fi = 20 kHz. These values are explicitly guaranteed in the "AC Specifications" table of the SLAS245E datasheet for VDD = VREF = 2.7 V, confirming usable high-fidelity performance at minimum supply voltage.

How does the autopower-down feature of the TLV2541ID behave during intermittent sampling?

The TLV2541ID enters autopower-down immediately after conversion completion. With ≥0.5 μs inactive time, ICC drops to 2 μA (2.7 V) or 5 μA (5 V); with ≥2 ms inactive time, it reaches deep power-down of 1 μA. This behavior is automatic and requires no software command - ideal for microcontroller-gated sampling where CS is asserted only per acquisition cycle.

Is the TLV2541ID pin-compatible with other members of the TLV254x family?

No, the TLV2541ID is not pin-compatible with TLV2542ID or TLV2545ID. While all share the same 8-pin SOIC package, pin functions differ: TLV2541ID uses Pin 7 as FS, whereas TLV2542ID and TLV2545ID repurpose Pin 7 as AIN1 or AIN(−), respectively. PCB layout must match the exact variant - TLV2541ID requires FS functionality on Pin 7.