STMicroelectronics TSA1401IF

Overview

TSA1401IF from STMicroelectronics is a 14-bit, 20 Msps pipeline analog-to-digital converter optimized for ultra-low power consumption (85 mW at 20 Msps with external references), differential analog input operation, and high dynamic performance (–90.5 dBc SFDR, 73.1 dBc SNR at 10 MHz). It operates from a single 2.5 V analog supply and supports 2.5 V/3.3 V digital I/O, targeting high-end imaging systems requiring precision, speed, and thermal efficiency.

For engineers reviewing the TSA1401IF datasheet, TSA1401IF pinout, TSA1401IF application, or TSA1401IF equivalent, this ADC delivers verified static linearity (±2 LSB INL), adjustable power-speed trade-off, tri-state digital outputs, internal/external reference selection, and industrial temperature operation (–40°C to +85°C) in a compact TQFP48 package.

Technical Context

The TSA1401IF implements a 14-stage pipeline architecture with 1.5-bit/stage resolution, digital error correction, and sample-and-hold per stage-enabling monotonicity, no missing codes, and 8.5-clock-cycle pipeline latency. Its deep submicron CMOS process enables simultaneous high linearity and low power dissipation.

Analog input is sampled on the rising clock edge; digital outputs are latched on the falling edge. Reference mode (REFMODE pin) selects between internal bandgap references (VREFP ≈ 0.84 V, full-scale 1.8 Vpp) or externally driven references (e.g., TS431) enabling 2.5 Vpp full-scale and improved SNR/SFDR performance.

Key Specifications

Pinout & Package

Package: 48-lead TQFP (7 mm × 7 mm, 0.5 mm pitch), industrial temperature grade (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed, low-power 14-bit ADC applications.

Compared with AD9240ASTZ and MAX1186ETM+, the TSA1401IF uniquely combines 20 Msps speed, 85 mW ultra-low power, configurable reference architecture, and tri-state outputs-making it the only option supporting scalable power, differential input optimization, and industrial temperature operation in a single 48-TQFP package.

Availability

TSA1401IF is available at Aetrix Electronics and suitable for high-end infrared imaging, X-ray medical imaging, and test instrumentation requiring stable component supply, long-term lifecycle continuity, and industrial-grade reliability.

Supply support for TSA1401IF 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, mixed-signal, power, and microcontroller solutions for industrial, automotive, and consumer markets.

The TSA1401IF belongs to ST's high-performance data conversion product line, engineered specifically for low-power, high-linearity digitization in demanding imaging and instrumentation applications where thermal density and signal fidelity are critical.

FAQ

What is the minimum and maximum sampling frequency supported by the TSA1401IF?

The TSA1401IF supports sampling frequencies from 0.5 Msps to 20 Msps. At lower rates, power consumption scales proportionally-e.g., ICCA drops from 40 mA (20 Msps) to ~20 mA (5 Msps) with external references. The clock input accepts standard CMOS levels with 50% duty cycle tolerance and 25 ns minimum pulse width.

Can the TSA1401IF operate with only internal references, and what are the resulting performance metrics?

Yes-when REFMODE = VIL, internal references activate: VREFP ≈ 0.84 V and VREFM = 0 V, yielding a 1.68 Vpp full-scale range. Under these conditions at 20 Msps and Fin = 10 MHz, typical performance is SFDR = –91 dBc, SNR = 73.1 dBc, and ENOB = 12.0 bits. Power rises to 110 mW due to internal reference circuitry activation.

How does the IPOL pin affect power consumption and linearity?

The IPOL pin adjusts input-stage polarization current to tune power versus speed. Increasing IPOL current improves small-signal linearity (reducing DNL) but raises analog supply current by up to 10%. At 20 Msps, optimal IPOL setting balances 85 mW total power with ±0.8 LSB DNL-verified across –40°C to +85°C using the EVAL1401/AB evaluation board.

Is the TSA1401IF pin-compatible with any newer ST ADCs for drop-in replacement?

No-TSA1401IF is an obsolete part (as noted in its December 2003 datasheet) and has no direct pin-compatible successor from ST. Modern alternatives like the AD9240 series or TI ADS58B19 require PCB redesign due to differing pinouts, supply schemes, and interface protocols. Migration requires full signal integrity and thermal revalidation.