ISLA222S12IR1Z - Dual 12-bit 125 MSPS JESD204B ADC | Renesas
MPN： ISLA222S12IR1Z ✓ 啟用中ISLA222S12IR1Z 概覽
An ADC (analog-to-digital converter) is a data converter integrated circuit that samples continuous analog signals and quantizes them into discrete digital codes for downstream processing by FPGAs, ASICs, DSPs, or microcontrollers. High-speed dual-channel ADCs sit at the front end of digital signal chains in communications, defense, and test equipment, where they convert IF or baseband analog signals into digital streams. Within the data-converter taxonomy, the ISLA222S12IR1Z is a pipelined ADC -> successive-approximation/pipelined hybrid -> data converter -> signal-chain IC -> semiconductor.
Key features include 12-bit resolution, 125 MSPS maximum sampling rate per channel, two simultaneously-sampling channels, a JESD204B subclass 0/1/2 serial output interface, integrated input buffer, internal sample-and-hold, and a typical SNR of 69.5 dBFS at 70 MHz input. The QFN-EP package offers an exposed thermal pad with low thermal resistance suitable for continuous-conversion industrial environments.
The ISLA222S12IR1Z uses FemtoCharge switched-capacitor pipeline architecture, which reduces the number of comparators per stage relative to conventional flash front-ends, cutting power consumption while preserving linearity. Internal calibration corrects gain and offset drift across temperature, supporting the industrial -40C to +85C operating range.
Typical applications include radar and phased-array signal chains, software-defined radio (SDR) receivers, medical imaging front-ends, communications test equipment, and high-speed data acquisition systems. The JESD204B serial interface simplifies board routing by replacing parallel LVDS with one or two serialized lanes, reducing FPGA pin count and PCB trace congestion.
When designing with this part, follow the JESD204B link-setup procedure in the datasheet: configure the FPGA receiver to detect K28.5 commas, negotiate lane alignment via the SYNC~ signal, and use the SYSREF input for deterministic multi-device synchronization. Decouple AVDD/AVSS with low-ESL 100 nF + 10 uF ceramics adjacent to each pin pair.
This page synthesizes distributor pricing, drop-in alternatives from the same ISLA222S pin-compatible family, and practical design notes that complement the manufacturer datasheet.
直接替換替代品，適用於 ISLA222S12IR1Z — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ISLA222S12IR1Z （相同外形與佔位） — 差異在於 Architecture, Package, Number of Channels, Resolution, Sampling Rate (max).
ISLA222S20IR1Z
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ISLA222S25IR1Z
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ISLA224S12IR1Z
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ISLA224S25IR1Z
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADS42JB69IRGC25
✅ 直接替換聯絡詢價
查看資料表 →ISLA222S12IR1Z 最大額定值與電氣特性
| 解析度 | 12 bits |
| Number of Channels | 2 (dual, simultaneous sampling) |
| Sampling Rate (max) | 125 MSPS |
| Architecture | FemtoCharge switched-capacitor pipelined |
| Digital Output Interface | JESD204B subclass 0/1/2 (serial) |
| Input Type | Differential analog input |
| Power Supply (AVDD) | 1.8 V (typ) |
| Power Supply (DVDD) | 1.8 V (typ) |
| 工作溫度 | -40C to +85C (industrial) |
| 封裝 | 48-pin QFN-EP (7x7 mm) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
| Pin-Compatible Family | ISLA222S12/20/25, ISLA224S12/20/25 (12/14-bit, 125-250 MSPS) |
ISLA222S12IR1Z 48-pin qfn-ep (7x7 mm) 腳位配置指南
ISLA222S12IR1Z（48-pin qfn-ep (7x7 mm) 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： ISLA222S12IR1Z.
請參閱 資料表 以查看完整腳位配置。
典型應用
ISLA222S12IR1Z 適用於 6 應用s: Phased-Array Radar Signal Chain, Software-Defined Radio (SDR) Receiver, Medical Imaging Front-End, Communications Test & Measurement Equipment, High-Speed Data Acquisition Systems, Automotive & Industrial Sensor Digitization.
Phased-Array Radar Signal Chain
The ISLA222S12IR1Z is well suited to phased-array radar digitizers that demand deterministic multi-channel synchronization. Its JESD204B subclass 1 interface accepts an external SYSREF pulse to align sample instants across hundreds of ADC channels within picoseconds, critical for coherent beamforming. The 12-bit / 125 MSPS rate captures IF bandwidths up to ~60 MHz, sufficient for many surveillance and weather radar profiles. Per-channel power of roughly 250 mW (estimated at 1.8 V AVDD) is acceptable for densely populated array tiles. Designers should follow the datasheet's recommended SYSREF distribution topology (matched-length fan-out) to preserve timing alignment across channels.
推薦
Software-Defined Radio (SDR) Receiver
For wideband SDR receivers covering HF through L-band, the ISLA222S12IR1Z provides dual simultaneous sampling channels suitable for I/Q digitization directly behind an analog quadrature demodulator. The JESD204B serial output eliminates parallel LVDS routing congestion, freeing FPGA pins for digital down-conversion logic. At 125 MSPS, the part digitizes up to ~62.5 MHz of Nyquist bandwidth per channel, covering most narrowband and many wideband waveforms. The 12-bit resolution delivers approximately 69 dB SNR (estimated), adequate for amateur, commercial, and many defense waveforms. Power consumption stays below 0.5 W per channel, enabling portable battery-powered SDR designs.
推薦
Medical Imaging Front-End
Ultrasound and other medical imaging front-ends digitize multi-channel transducer arrays where the ISLA222S12IR1Z's dual-channel density, JESD204B output, and -40C to +85C industrial temperature range fit cleanly. The FemtoCharge architecture provides the low-aperture-jitter (~150 fs typical, estimated) required for harmonic imaging and contrast-agent detection modes. Two channels per package reduce PCB area for high-channel-count probes. Designers must observe medical device IEC 60601 isolation requirements separately from the ADC itself. Pair the ADC with a low-noise front-end LNA and time-gain compensation in the FPGA.
推薦
Communications Test & Measurement Equipment
Vector signal analyzers, spectrum analyzers, and protocol testers benefit from the ISLA222S12IR1Z's 12-bit linearity and JESD204B simplicity. Two matched channels enable true differential I/Q capture of modulated signals for EVM (error vector magnitude) analysis on LTE, 5G NR, and Wi-Fi waveforms. The 125 MSPS sample rate covers signal bandwidths up to ~60 MHz at baseband. Deterministic latency via JESD204B subclass 1 simplifies calibration of multi-instrument testbeds. Use a precision clock such as an SiTime or Crystek oscillator to keep aperture jitter below 1 ps for best SNR.
推薦
High-Speed Data Acquisition Systems
Multi-channel data acquisition systems for industrial vibration analysis, sonar, and scientific instrumentation can use the ISLA222S12IR1Z for synchronous sampling of multiple sensor channels. The JESD204B interface routes serialized data to an FPGA or SoC for storage to NVMe or streaming over Ethernet, dramatically reducing cable and connector pin count compared to parallel LVDS architectures. At 125 MSPS per channel, two channels digitize sensor bandwidths up to ~62.5 MHz per channel, covering most accelerometer, geophone, and hydrophone signals. Industrial -40C to +85C operation supports factory-floor deployments.
推薦
Automotive & Industrial Sensor Digitization
Although not AEC-Q100 qualified, the ISLA222S12IR1Z serves industrial sensor digitization such as LiDAR, machine vision illumination feedback, and motor-control current sensing where 12-bit resolution at 125 MSPS is sufficient. The JESD204B interface connects to industrial-grade FPGAs such as the Xilinx Spartan-7 or Intel Cyclone V. Robust operating range of -40C to +85C supports factory-floor installations. For automotive AEC-Q100 qualified applications, designers should verify part qualification status directly with Renesas or select an AEC-Q100 alternative such as TI's ADS42JB69 automotive variant.
推薦
推薦產品摘要
工程參考資料，適用於 ISLA222S12IR1Z — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ISLA222S20IR1Z | ISLA222S25IR1Z | ISLA224S12IR1Z | ISLA224S25IR1Z | ADS42JB69IRGC25 |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Texas Instruments |
| Package | 48-pin QFN-EP (7x7 mm) | 48-pin QFN-EP (7x7 mm) - same | 48-pin QFN-EP (7x7 mm) - same | 48-pin QFN-EP (7x7 mm) - same | 48-pin QFN-EP (7x7 mm) - same | 64-pin QFN (RGZ) - DIFFERENT |
| Resolution | 12 bits | 12 bits | 12 bits | 14 bits (+2 bits) | 14 bits (+2 bits) | 16 bits (+4 bits) |
| Max Sample Rate | 125 MSPS | 200 MSPS (+60%) | 250 MSPS (+100%) | 125 MSPS | 250 MSPS (+100%) | 250 MSPS (+100%) |
| Channels | 2 | 2 | 2 | 2 | 2 | 2 |
| Digital Output Interface | JESD204B subclass 0/1/2 | JESD204B subclass 0/1/2 | JESD204B subclass 0/1/2 | JESD204B subclass 0/1/2 | JESD204B subclass 0/1/2 | JESD204B |
| Architecture | FemtoCharge switched-capacitor pipelined | FemtoCharge switched-capacitor pipelined | FemtoCharge switched-capacitor pipelined | FemtoCharge switched-capacitor pipelined | FemtoCharge switched-capacitor pipelined | TI proprietary pipelined |
| Operating Temperature Range | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| Approximate Unit Price (qty 1) | $38.50 | $48.00 | $55.00 | $52.00 | $68.00 | $45.00 |
主要差異化特點
- FemtoCharge architecture in 48-pin QFN-EP (對比ADS42JB69IRGC25)
- Pin-compatible family across speed grades and resolutions (對比Discrete competitive parts)
- JESD204B subclass 0/1/2 compliance with deterministic latency (對比Parallel LVDS ADCs)
設計說明
Power the ISLA222S12IR1Z from clean, low-noise 1.8 V LDO regulators for both AVDD (analog) and DVDD/DRVDD (digital) rails. Per datasheet recommendations, decouple each AVDD/AVSS pin pair with a 100 nF X7R ceramic placed within 2 mm of the pin, plus a shared 10 uF bulk capacitor near the package. Estimated: at 125 MSPS and 1.8 V AVDD, total consumption is approximately 0.4-0.5 W; verify with actual measurement on your hardware.
Route the JESD204B serial lanes as 100 ohm differential stripline or microstrip with length-matched traces (within 0.5 mm between lanes of the same link) and continuous ground reference underneath. Place the AC-coupling capacitors (typically 100 nF X7R) at the receiver end of each lane, not the ADC end. Keep the SYSREF and SYNC~ traces short and isolated from the high-speed serial lanes to avoid coupling. The exposed thermal pad must be soldered to a continuous ground plane with multiple thermal vias for heat dissipation.
Common pitfalls include: (1) failing to drive the differential clock input (CLKIN+/CLKIN-) with a low-jitter LVDS/LVPECL source - jitter above 1 ps rms directly degrades SNR; (2) omitting the SYSREF signal in subclass 1 mode, which causes deterministic-latency failure and link-establishment errors; (3) exceeding the maximum AVDD ramp rate recommended in the datasheet, which can trigger internal calibration faults at power-up; (4) not following the recommended power-up sequence (AVDD before DVDD before DRVDD) which can cause latch-up. Always perform a software reset via the SPI port after power-up before initiating JESD204B link training.
Maintain 100 ohm differential impedance on the JESD204B serial lanes, and use a series AC-coupling capacitor of 100 nF on each lane at the FPGA receiver side. For multi-ADC synchronization via SYSREF, distribute the SYSREF signal with matched-length traces and a low-skew buffer such as the CDCE62005 or LMK04828. Estimated: with proper layout, the ISLA222S12IR1Z achieves approximately 69-70 dBFS SNR at 70 MHz input - measured numbers vary with clock jitter and input drive level.
合規資訊
RoHS and lead-free per Renesas ISLA222S datasheet and product page. Not AEC-Q100 qualified - this part targets industrial/commercial, not automotive. Halogen-free status not explicitly confirmed in retrieved web data.
