Texas Instruments ADS5407IZAY

Overview

ADS5407IZAY from Texas Instruments is a dual-channel, 12-bit, 500 Msps analog-to-digital converter (ADC) designed for wideband receiver front ends in microwave and RF systems. It features differential analog inputs (INA_P/N, INB_P/N), DDR LVDS digital outputs (DA[11:0]P/N, DB[11:0]P/N), 1.25 Vpp full-scale input swing, >1.0 GHz analog input bandwidth, and operates across –40°C to +85°C. It is used in ultra-wideband software-defined radio and radar signal acquisition.

For engineers reviewing the ADS5407IZAY datasheet, ADS5407IZAY pinout, ADS5407IZAY application, or ADS5407IZAY equivalent, key selection considerations include its 500 Msps dual-channel sampling rate, 12-bit resolution with 63.7 dBFS SNR at 230 MHz, DDR LVDS interface timing (tsuA/thA ≤ 800 ps), and support for optional 2× decimation with programmable FIR filtering.

Technical Context

The ADS5407IZAY employs a pipeline ADC architecture with on-chip track-and-hold and analog input buffers that provide high-impedance (>1 kΩ differential DC input resistance), 1.9 V common-mode biasing, and >1.0 GHz 3dB input bandwidth. Its digital block includes interleaving correction, gain/offset calibration, and configurable 2× decimation with low-pass or high-pass FIR filters.

It supports DDR LVDS output with programmable DACLKP/N and DBCLKP/N edge alignment, synchronous multi-ADC operation via SYNCP/N and SYNCOUTP/N, and fast overrange detection (12-cycle latency) on OVRAP/N and OVRBP/N. Clock distribution uses internal clock buffer with 0.9 V common-mode bias and 100 fs rms aperture jitter.

Key Specifications

Pinout & Package

The ADS5407IZAY is housed in a 196-pin nFBGA package (12 mm × 12 mm, ZAY designation), with 0.8 mm pitch and exposed thermal pad. Pin assignments are defined for DDR LVDS output mode per SLAS934B Rev. January 2014.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS5404IZAY, the ADS5407IZAY adds on-chip decimation and interleaving correction-reducing FPGA resource usage and improving channel matching. Compared with ADS5409IZAY, it trades peak speed for lower power and relaxed layout, making it optimal for 250 MHz bandwidth systems requiring robustness over raw speed.

Availability

ADS5407IZAY is available at Aetrix Electronics and suitable for ultra-wideband SDR, radar signal acquisition, and power amplifier linearization requiring stable component supply, long-term industrial temperature support (–40°C to +85°C), and traceable sourcing.

Supply support for ADS5407IZAY 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 high-performance data converters and signal chain solutions.

The ADS5407IZAY belongs to TI's high-speed ADC product line, engineered specifically for demanding wideband communications, defense electronics, and test instrumentation where linearity, bandwidth, and multi-channel synchronization are critical.

FAQ

What is the maximum input frequency supported by the ADS5407IZAY?

The ADS5407IZAY has an analog input bandwidth of >1.0 GHz (3 dB point), enabling direct sampling of RF signals up to L-band (1–2 GHz) with acceptable amplitude flatness. At 450 MHz input frequency, it achieves 63.6 dBFS SNR and 77 dBc SFDR (auto correction disabled), confirming usable performance well into S-band. The device is not rated for continuous operation above its specified 500 Msps sampling rate.

Does the ADS5407IZAY support pin-compatible alternatives within the same package?

No, the ADS5407IZAY does not have a pin-compatible alternative in the 196-pin nFBGA ZAY package. While ADS5404IZAY shares the same package footprint and pinout, it lacks key features including on-chip 2× decimation and interleaving correction. ADS5409IZAY uses a different package variant and is not pin-compatible. System-level redesign is required for substitution.

How does the ADS5407IZAY handle clock jitter sensitivity?

The ADS5407IZAY specifies 100 fs rms aperture jitter, limiting SNR degradation at high input frequencies. External clock jitter dominates SNR roll-off beyond ~230 MHz; for example, 100 fs external jitter reduces SNR by ~1.5 dB at 450 MHz. TI recommends low-jitter clock sources (<50 fs) and proper PCB layout (short traces, matched lengths, controlled impedance) to maintain >63 dBFS SNR.

Can the ADS5407IZAY operate with single-ended analog inputs?

No-the ADS5407IZAY requires fully differential analog input signals on INA_P/N and INB_P/N. Its internal analog input buffer is optimized for differential drive with 1.9 V common-mode bias and 1.25 Vpp full-scale swing. Single-ended drive causes common-mode imbalance, degrading SNR and SFDR; external baluns or differential amplifiers are mandatory for single-ended source interfacing.

What power supply sequencing is required for reliable ADS5407IZAY startup?

The ADS5407IZAY requires monotonic ramp-up of all supplies: AVDD33 (3.3 V), AVDD18/AVDDC/DVDD/DVDDLVDS/IOVDD (1.8 V). TI specifies no strict sequencing order, but recommends powering AVDD33 first, followed by analog 1.8 V supplies (AVDD18, AVDDC), then digital 1.8 V supplies (DVDD, DVDDLVDS, IOVDD). Violating monotonicity risks latch-up or initialization failure; SRESETB must be held low for ≥100 ns after supplies stabilize.