Texas Instruments ADS5401IZAY

Overview

ADS5401IZAY from Texas Instruments is a single-channel, 12-bit, 800-Msps analog-to-digital converter with >1.2-GHz analog input bandwidth, 1.0-Vpp full-scale differential input, and DDR LVDS data output interface. It features an integrated analog input buffer with high-impedance input and supports optional 2× decimation with lowpass or highpass filtering-enabling simplified front-end filter design in ultra-wideband microwave receivers.

For engineers reviewing the ADS5401IZAY datasheet, ADS5401IZAY pinout, ADS5401IZAY application, or ADS5401IZAY equivalent, this page delivers verified technical context, validated pin functions, confirmed spectral performance at 230 MHz and 700 MHz IF, real-world latency values (50 clock cycles with auto-correction), and two manufacturer-validated alternative parts for wideband ADC selection.

Technical Context

The ADS5401IZAY employs a high-linearity track-and-hold architecture with on-chip analog input buffering to isolate signal sources from internal switching noise. Its differential clock input (CLKINP/N) accepts 40–800 MHz signals with 2-Vpp amplitude and 40%–60% duty cycle, while SYNCIN enables multi-device synchronization via programmable reset and SYNCOUT generation.

Digital output uses DDR LVDS signaling across DA[11:0]P/N and DACLKP/N, with configurable data alignment and 230–450 ps setup/hold timing relative to DACLK zero-crossing. Internal auto-correction reduces offset error to ±1 mV and improves SFDR by up to 5 dBc at 700 MHz compared to disabled mode.

Key Specifications

Pinout & Package

The ADS5401IZAY is housed in a 196-pin NFBGA package (12 mm × 12 mm, ZAY suffix), with exposed thermal pad for enhanced heat dissipation. Pin functions are validated per TI SLAS946B Rev B (January 2016).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed ADC applications.

Compared with ADS5402IZAY and ADS5409IZAY, the ADS5401IZAY delivers the lowest power consumption and highest SFDR at 700 MHz among TI's 12-bit 800-Msps family-making it the preferred choice for thermally constrained, high-dynamic-range IF receivers where single-channel operation suffices.

Availability

ADS5401IZAY is available at Aetrix Electronics and suitable for radar systems, signal intelligence platforms, ultra-wideband SDRs, and microwave receivers requiring stable component supply and long-term production continuity.

Supply support for ADS5401IZAY 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 over 90 years of innovation in high-performance data converters and signal chain solutions.

The ADS5401IZAY belongs to TI's high-speed ADC product line, engineered specifically for wideband communications, defense electronics, and test equipment demanding >1-GHz analog bandwidth and sub-100-fs jitter performance.

FAQ

What is the maximum sampling rate supported by the ADS5401IZAY?

The ADS5401IZAY supports a maximum sampling rate of 800 Msps, validated across the full industrial temperature range (–40°C to +85°C) with 50% clock duty cycle and proper power supply decoupling. At this rate, the device achieves 61.3-dBFS SNR and 74-dBc SFDR at 230 MHz input frequency, as specified in the SLAS946B datasheet. The ADS5401IZAY maintains functional stability up to 800 Msps without derating under recommended operating conditions.

Does the ADS5401IZAY include an analog input buffer, and what is its benefit?

Yes, the ADS5401IZAY integrates an analog input buffer with high-impedance differential input (1 kΩ at DC). This buffer isolates the internal track-and-hold circuit from source impedance variations and switching noise, enabling stable 1.0-Vpp full-scale operation without external driving amplifiers in many IF sampling applications. The buffer also fixes input common-mode voltage at 1.9 V, simplifying AC-coupled front-end design for the ADS5401IZAY.

What are the key timing parameters for the DDR LVDS interface of the ADS5401IZAY?

The ADS5401IZAY DDR LVDS interface specifies 230–450 ps setup time (tsu) and 230–410 ps hold time (th) relative to DACLK zero-crossing, with 100–200 ps rise/fall times. Data latency is 50 clock cycles when auto-correction is enabled, and DACLK edges are programmably aligned to center within the data valid window. These parameters ensure reliable capture by Xilinx or Intel FPGAs with LVDS input receivers, as confirmed in TI's application note SBAA222.

How does auto-correction affect the performance of the ADS5401IZAY?

Auto-correction in the ADS5401IZAY reduces offset error from ±6 mV to ±1 mV and improves SFDR by up to 5 dBc at 700 MHz (69 dBc → 74 dBc). It increases total power dissipation by ~0.11 W (from 1.22 W to 1.33 W) and adds 12 clock cycles to data latency (50 vs 38 cycles). The feature is register-controllable and recommended for applications prioritizing spurious-free dynamic range over minimal latency, such as spectrum analyzers and radar signal processors using the ADS5401IZAY.

What package type and thermal characteristics apply to the ADS5401IZAY?

The ADS5401IZAY uses a 196-pin NFBGA package (ZAY) measuring 12 mm × 12 mm with an exposed thermal pad. Its junction-to-ambient thermal resistance (RθJA) is 37.6°C/W under JEDEC-standard high-K board conditions. To maintain TJ ≤ 105°C at full 1.33-W dissipation, a 4-layer PCB with ≥4 thermal vias under the pad and 2-in² copper pour is recommended-verified in TI's thermal simulation report SPRUHZ6.