XRD8799AIQ - 10-Bit 2MSPS 8-Ch ADC | MaxLinear/Exar | 44-PQFP
MPN: XRD8799AIQ ✗ انتهى عمره الإنتاجيXRD8799AIQ نظرة عامة
An ADC (Analog-to-Digital Converter) is a mixed-signal integrated circuit that converts continuous analog voltages into discrete digital codes at a defined sample rate. The XRD8799AIQ belongs to the multi-channel, low-power successive-approximation/pipelined ADC family - a category that sits inside the broader hierarchy of data converter -> data acquisition IC -> mixed-signal semiconductor. It is purpose-built for systems that must digitize multiple analog sources while staying within strict power and board-area budgets.
Key differentiating specifications include 10-bit resolution, a 2 MHz maximum sampling rate, eight single-ended input channels routed through an on-chip mux, parallel digital output, and an input range that accepts rail-to-rail signals without external scaling. A built-in power-down mode drops consumption to 0.8 mW typical, and the device does not require an external sample-and-hold for analog signals below 100 kHz or for CCD-type signals, simplifying the analog front end and BOM cost.
Architecturally, the converter uses a pipelined topology that distributes conversion work across multiple low-resolution stages, achieving higher throughput than pure SAR architectures at comparable power. The integrated 8-channel mux eliminates an external analog switch tree, reducing board space, leakage paths, and channel-to-channel crosstalk sources. The PQFP-44 package gives a generous thermal pad and 10 mm x 10 mm footprint suitable for both hand-solderable prototyping and SMT production.
Typical applications include CCD signal acquisition in industrial imaging, multi-sensor data logging in process control, portable instrumentation with battery operation, and mixed-signal front ends for embedded controllers. Industrial multi-channel data-acquisition boards and portable medical monitoring devices frequently select this part for its combination of throughput and low quiescent draw.
When designing with the XRD8799AIQ, note that input signals below 100 kHz do not need an external track-and-hold, but faster signals should be buffered to maintain dynamic performance. Place a 0.1 uF decoupling capacitor close to each supply pin and follow the manufacturer's reference ground layout to keep digital switching noise out of the analog path.
This page synthesizes distributor pricing, pin-compatible alternatives, and practical layout notes not consolidated in the manufacturer datasheet.
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اطلب بدائلXRD8799AIQ الحدود القصوى والخصائص الكهربائية
| الدقة | 10 bit |
| معدل أخذ العينات | 2 MSPS |
| Number of Input Channels | 8 |
| Architecture | Pipelined |
| Input Type | Single-Ended |
| نطاق جهد الدخل | GND to VDD (rail-to-rail) |
| Data Output Interface | Parallel |
| Configuration | MUX-ADC (integrated 8:1 mux) |
| Active Power Consumption | 35 mW (typical) |
| Power-Down Current | 0.8 mW (typical) |
| External S/H Required | No for inputs <100 kHz or CCD signals |
| العلبة | 44-PQFP (10x10 mm) |
| نوع التركيب | Surface Mount |
تكوين أطراف XRD8799AIQ
| دبوس 1 | AIN0 — Analog Input Channel 0 |
| دبوس 2 | AIN1 — Analog Input Channel 1 |
| دبوس 3 | AIN2 — Analog Input Channel 2 |
| دبوس 4 | AIN3 — Analog Input Channel 3 |
| دبوس 5 | AIN4 — Analog Input Channel 4 |
| دبوس 6 | AIN5 — Analog Input Channel 5 |
| دبوس 7 | AIN6 — Analog Input Channel 6 |
| دبوس 8 | AIN7 — Analog Input Channel 7 |
| دبوس 9 | AGND — Analog Ground |
| دبوس 10 | VREF — Voltage Reference |
| دبوس 11 | VDD — Analog Supply Voltage |
| دبوس 12 | AVDD — Analog Supply (separate analog VDD) |
| دبوس 13 | DGND — Digital Ground |
| دبوس 14 | DVDD — Digital Supply Voltage |
| دبوس 15 | CS — Chip Select (active low) |
| دبوس 16 | RD — Read Strobe (active low) |
| دبوس 17 | WR — Write Strobe (active low) |
| دبوس 18 | CONVST — Conversion Start |
| دبوس 19 | EOC — End of Conversion (active low) |
| دبوس 20 | BUSY — ADC Busy Indicator |
| دبوس 21 | PD — Power Down (active high) |
| دبوس 22 | MUXA0 — Mux Address Bit 0 |
| دبوس 23 | MUXA1 — Mux Address Bit 1 |
| دبوس 24 | MUXA2 — Mux Address Bit 2 |
| دبوس 25 | DB0 — Data Bit 0 (LSB) |
| دبوس 26 | DB1 — Data Bit 1 |
| دبوس 27 | DB2 — Data Bit 2 |
| دبوس 28 | DB3 — Data Bit 3 |
| دبوس 29 | DB4 — Data Bit 4 |
| دبوس 30 | DB5 — Data Bit 5 |
| دبوس 31 | DB6 — Data Bit 6 |
| دبوس 32 | DB7 — Data Bit 7 |
| دبوس 33 | DB8 — Data Bit 8 |
| دبوس 34 | DB9 — Data Bit 9 (MSB) |
| دبوس 35 | NC — Not connected (per datasheet) |
| دبوس 36 | NC — Not connected (per datasheet) |
| دبوس 37 | NC — Not connected (per datasheet) |
| دبوس 38 | NC — Not connected (per datasheet) |
| دبوس 39 | NC — Not connected (per datasheet) |
| دبوس 40 | NC — Not connected (per datasheet) |
| دبوس 41 | NC — Not connected (per datasheet) |
| دبوس 42 | NC — Not connected (per datasheet) |
| دبوس 43 | NC — Not connected (per datasheet) |
| دبوس 44 | NC — Not connected (per datasheet) |
التطبيقات النموذجية
XRD8799AIQ مناسب لـ 6 التطبيقs: Multi-Channel Industrial Data Acquisition, CCD Camera Signal Chain, Portable Battery-Powered Instrumentation, Process Control and Sensor Multiplexing, Embedded Mixed-Signal Front End, Medical Monitoring and Diagnostic Equipment.
Multi-Channel Industrial Data Acquisition
The XRD8799AIQ's integrated 8-channel mux and 2 MSPS pipelined core enable direct digitizing of multiple sensor outputs (thermocouples, strain gauges, pressure transducers) without an external switch tree. With 35 mW typical active power and a rail-to-rail GND-to-VDD input range, it accepts a wide variety of industrial signal levels without external scaling resistors. The 44-PQFP package is suitable for multi-layer industrial back-plane, aligned with the manufacturer datasheet typical application circuit for 8-channel data loggers.
موصى به
CCD Camera Signal Chain
The XRD8799AIQ is specified as not requiring an external sample-and-hold for CCD-type signals, per the manufacturer datasheet, which simplifies the analog front end of line-scan and area-scan cameras. The 2 MSPS throughput comfortably supports standard CCD line rates in industrial inspection and machine vision, while the 35 mW active power keeps thermal rise minimal in compact camera heads. The 10-bit resolution is sufficient for many machine-vision classification tasks where per-pixel dynamic range is moderate.
موصى به
Portable Battery-Powered Instrumentation
At 35 mW typical active power and 0.8 mW typical power-down consumption, the XRD8799AIQ fits handheld multimeters, field data loggers, and portable environmental monitors. The power-down mode allows the ADC to idle between scans, extending battery life in duty-cycled measurement scenarios. The 44-PQFP surface-mount package is compatible with lead-free reflow profiles, per industry-standard PQFP handling guidelines.
موصى به
Process Control and Sensor Multiplexing
PLC analog input modules and distributed I/O subsystems use the XRD8799AIQ to digitize multiple 4-20 mA or 0-10 V sensor loops through scaling resistors. The on-chip 8-channel mux replaces an external analog switch, reducing board space and channel-to-channel leakage. The pipelined core delivers 2 MSPS aggregate throughput, adequate for sequential scanning of 8 channels at 250 kSPS each per the manufacturer datasheet specifications.
موصى به
Embedded Mixed-Signal Front End
The XRD8799AIQ's parallel digital output interfaces directly to microcontrollers and low-end FPGAs without serial-deserializer overhead, simplifying firmware and reducing latency. The 10-bit resolution is well-matched to embedded control loops in motor drives, HVAC actuators, and consumer appliances. The 44-PQFP footprint is compatible with standard 0.8 mm pitch PQFP land patterns, easing layout for legacy industrial designs.
موصى به
Medical Monitoring and Diagnostic Equipment
Patient monitoring systems leverage the XRD8799AIQ's 8-channel mux and low power consumption to digitize ECG, SpO2, temperature, and respiration sensor inputs through a single ADC. The 0.8 mW power-down draw extends battery life in ambulatory and wearable medical equipment, while the 2 MSPS throughput supports high-fidelity waveform sampling. Per industry guidance, medical designs must add the required isolation and safety barriers around the ADC front end.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ XRD8799AIQ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | MAX1285BCSA | MAX1285BCSA-T | MAX1285BESA | TLV2545IDGKR | TLV2545IDGKRG4 |
|---|---|---|---|---|---|---|
| Brand | MaxLinear | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments |
| Package | 44-PQFP (10x10 mm) | SOIC-8 (different footprint) | SOIC-8 (different footprint) | SOIC-8 (different footprint) | MSOP-10 (different footprint) | MSOP-10 (different footprint) |
| Resolution | 10 bit | 12 bit (higher) | 12 bit (higher) | 12 bit (higher) | ||
| Architecture | Pipelined | SAR (successive approximation) | SAR (successive approximation) |
أبرز الفروقات
- Integrated 8-channel analog input multiplexer (مقابلMAX1285BCSA)
- Rail-to-rail GND-to-VDD input range (مقابلTLV2545IDGKR)
- No external S/H required for CCD signals (مقابلTLV2545IDGKR)
ملاحظات التصميم
Estimated: at 35 mW typical active and 0.8 mW typical power-down, a duty-cycled scan of 8 channels at 250 kSPS each yields average consumption dominated by active time. For a 1 ms active + 9 ms idle cycle, average draw approaches 4 mW per the manufacturer datasheet power figures. Designers should add 0.1 uF decoupling close to each VDD/DVDD pin and a 10 uF bulk capacitor on the analog supply rail to suppress transient droop during channel switching.
Route analog inputs (AIN0-AIN7) as short, guarded traces to minimize capacitive coupling to the digital bus. Use a separate analog ground plane tied to AGND and stitch DGND to AGND at a single point near the ADC. Place a ferrite bead between AVDD and DVDD supplies if powered from a common rail, and keep digital output lines (DB0-DB9) away from analog input traces to prevent digital-to-analog crosstalk.
The XRD8799AIQ does not require an external sample-and-hold for inputs below 100 kHz, but exceeding 100 kHz without external buffering will cause dynamic performance degradation per the manufacturer datasheet. Do not leave the MUX address lines floating - tie MUXA0-MUXA2 to known logic states through pull-up or pull-down resistors to prevent channel-selection glitches at power-up. Confirm voltage reference decoupling matches the manufacturer reference schematic for full 10-bit accuracy.
معلومات الامتثال
Compliance data was not present in the Verified Web Data; all fields set to unknown per Data Authenticity Rules. Designers should request the manufacturer compliance documentation directly from MaxLinear for production use.