Renesas IMS82C55AZ

Overview

KAD5612P-25Q72 from Renesas (formerly Intersil) is a dual-channel, 12-bit, 250MSPS analog-to-digital converter using FemtoCharge™ technology on standard CMOS. It delivers 66.0dBFS SNR at 105MHz input, 86.0dBc SFDR, and 60fs RMS aperture jitter, operating from single 1.8V supplies across –40°C to +85°C. It serves high-speed digitization in radar front-ends and broadband communications receivers.

For engineers reviewing the KAD5612P-25Q72 datasheet, KAD5612P-25Q72 pinout, KAD5612P-25Q72 application, or KAD5612P-25Q72 equivalent, key selection criteria include dual-channel synchronization, LVDS/CMOS output format flexibility, programmable gain/offset/skew matching, 1.3GHz analog input bandwidth, and support for nap/sleep power states in demanding RF signal chains.

Technical Context

The KAD5612P-25Q72 implements a pipelined successive approximation ADC architecture with integrated digital error correction. Its dual cores share a common clock tree and support independent configuration via SPI for channel-specific gain, offset, and skew calibration.

It features a fully differential analog input path with 1.47VP-P full-scale range, 1.3GHz small-signal bandwidth, and 90ppm/°C full-scale drift. Clock inputs accept 1.8V LVPECL-compatible differential signals, and the internal DLL supports ÷1/÷2/÷4 division with phase selection.

Key Specifications

Pinout & Package

72-lead QFN (10mm × 10mm, exposed paddle), RoHS-compliant, thermal pad connected to AVSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS52J90IRGCT and AD9680BCPZ-500, the KAD5612P-25Q72 uniquely balances 250MSPS speed, 12-bit linearity, and factory-trimmed inter-channel skew control in a single 1.8V supply QFN package-making it optimal for cost-sensitive, thermally constrained radar and broadband comms designs where pin-level synchronization is critical.

Availability

KAD5612P-25Q72 is available at Aetrix Electronics and suitable for radar signal processing, WiMAX base station development, and high-speed test equipment requiring stable component supply and long-term industrial temperature support.

Supply support for KAD5612P-25Q72 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

Renesas Electronics acquired Intersil in 2017 and maintains its high-performance analog and mixed-signal product lines, including precision data converters for RF and communications infrastructure.

The KAD5612P-25Q72 belongs to Renesas' high-speed ADC family designed specifically for direct RF sampling, digital beamforming, and wideband communications systems requiring low power, high linearity, and deterministic latency.

FAQ

What is the maximum analog input frequency supported by the KAD5612P-25Q72?

The KAD5612P-25Q72 specifies a 1.3GHz analog input bandwidth, enabling direct sampling of RF signals up to S-band frequencies. At 995MHz input, it maintains 62.5dBFS SNR and 50.2dBc SFDR - sufficient for undersampled digitization in radar and satellite receivers where anti-alias filtering is relaxed.

Does the KAD5612P-25Q72 support independent configuration of its two ADC channels?

Yes, the KAD5612P-25Q72 supports per-channel SPI-accessible registers for gain, offset, and skew adjustment. This allows fine-tuning of inter-channel matching to <1ps skew, critical for coherent signal processing in phased arrays and I/Q demodulators where image rejection depends on channel balance.

What output formats does the KAD5612P-25Q72 support, and how are they selected?

The KAD5612P-25Q72 supports DDR LVDS and LVCMOS outputs, selected via the OUTMODE pin. Data format (two's complement, gray code, or offset binary) is configured via the OUTFMT pin. LVDS mode requires external 100Ω differential termination; LVCMOS mode drives standard CMOS logic with 1.8V swing and 1.4ns fall time.

How does the nap mode affect latency and wake-up time in the KAD5612P-25Q72?

In nap mode, the KAD5612P-25Q72 reduces power to 148mW while retaining register state and reference bias. Wake-up time is 1µs with sample clock running - preserving pipeline latency (7.5 cycles) upon resumption. This enables rapid duty-cycled operation in pulsed radar or TDD systems without reinitialization delay.

Is the KAD5612P-25Q72 pin-compatible with other members of the KAD5612P family?

Yes, the KAD5612P-25Q72 is fully pin-compatible with KAD5612P-21Q72, KAD5612P-17Q72, and KAD5612P-12Q72 - all housed in the same 72-lead QFN package. Speed grade differences are implemented internally; no PCB redesign is needed when scaling sample rate across this family for prototyping or variant management.