Texas Instruments ADS5404IZAY

Overview

ADS5404IZAY from Texas Instruments is a dual-channel, 12-bit, 500 Msps analog-to-digital converter with differential analog inputs (INA_P/N, INB_P/N), DDR LVDS digital outputs (DA[11:0]P/N, DB[11:0]P/N), and integrated analog input buffering for >1.2 GHz input bandwidth. It delivers 60.6 dBFS SNR and 77 dBc SFDR at 230 MHz IF, targeting wideband receiver front ends in radar and SDR systems.

For engineers reviewing the ADS5404IZAY datasheet, ADS5404IZAY pinout, ADS5404IZAY application, or ADS5404IZAY equivalent, key selection considerations include its 196-pin BGA package, dual-channel interleaving correction, programmable decimation-by-2, low 100 fs rms aperture jitter, and support for synchronous multi-ADC timing via SYNCIN/SYNCOUT.

Technical Context

The ADS5404IZAY implements a pipeline ADC architecture with on-chip track-and-hold, analog input buffers isolating external sources from internal switching noise, and interleaving correction for gain/offset mismatch between its two 12-bit channels. It supports DDR LVDS output with programmable DACLKP/N and DBCLKP/N edge alignment.

Its clock interface accepts differential LVDS/LVPECL/sine-wave inputs at 0.9 V common-mode voltage, while analog inputs operate at 1.9 V common-mode with 1.0 Vpp full-scale range. Digital control uses a 3-wire SPI interface (SCLK, SDIO, SDENB) with register-programmable power modes including deep-sleep (20 µs wake-up) and shut-down (2.5 ms wake-up).

Key Specifications

Pinout & Package

The ADS5404IZAY is housed in a 196-ball nFBGA package (12 mm × 12 mm, ZAY designation) with 0.8 mm pitch and RoHS-compliant green finish. Thermal resistance is θJA = 37.6°C/W under JEDEC-standard conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS5407IZAY, the ADS5404IZAY trades extended temperature rating for lower cost and identical industrial-grade performance; versus AD9689BCPZ-500, it provides proven LVDS interoperability and lower latency (50 vs. 124 clock cycles) at the expense of resolution and serial interface flexibility.

Availability

ADS5404IZAY is available at Aetrix Electronics and suitable for radar systems, software-defined radio platforms, and test instrumentation requiring stable component supply across long production lifecycles and demanding RF performance specifications.

Supply support for ADS5404IZAY 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 high-performance data converters for industrial, automotive, and communications markets.

The ADS5404IZAY belongs to TI's high-speed ADC portfolio designed specifically for wideband receiver front ends in defense, communications, and instrumentation-emphasizing linearity, low jitter, and multi-device synchronization.

FAQ

What is the maximum input frequency supported by the ADS5404IZAY analog front end?

The ADS5404IZAY analog input bandwidth is specified at >1.2 GHz (3 dB point), allowing full-scale signal capture up to this frequency with minimal amplitude attenuation. This enables direct sampling of L-band and S-band IF signals without intermediate downconversion, as confirmed in the SLAS945B datasheet Figure 28 and electrical characteristics table.

Does the ADS5404IZAY support synchronous sampling across multiple devices?

Yes, the ADS5404IZAY supports deterministic multi-device synchronization via its SYNCP/N input and SYNCOUTP/N output pins. When driven with a common clock and SYNCIN signal, multiple ADS5404IZAY devices can achieve sub-cycle phase alignment for coherent array applications, as detailed in the "MULTICHIP SYNC" block diagram and timing section of SLAS945B.

What power supply voltages does the ADS5404IZAY require?

The ADS5404IZAY requires five independent supply rails: AVDD33 = 3.3 V (analog core), AVDDC = 1.8 V (clock buffer), AVDD18 = 1.8 V (analog frontend), DVDD = 1.8 V (digital logic), DVDDLVDS = 1.8 V (LVDS drivers), and IOVDD = 1.8 V (SPI interface). Each rail has specified tolerance ranges and current draw per the SLAS945B recommended operating conditions table.

Can the ADS5404IZAY operate with decimation enabled, and what is the resulting data rate?

Yes, the ADS5404IZAY supports programmable decimation-by-2 via SPI register control, reducing the output data rate from 500 Msps to 250 Msps per channel while maintaining full 12-bit resolution. This lowers FPGA interface bandwidth requirements and reduces system-level power consumption, as documented in the "Features" and "Electrical Characteristics" sections of SLAS945B.

What is the aperture jitter specification for the ADS5404IZAY, and how does it impact SNR?

The ADS5404IZAY has a typical aperture jitter of 100 fs rms, directly limiting SNR at high input frequencies. For example, at 700 MHz input, external clock jitter exceeding ~50 fs degrades SNR below the specified 59.4 dBFS. This value is measured and guaranteed per the SLAS945B electrical characteristics table and validated in the "SNR AND CLOCK JITTER" application note section.