AD9244BSTZ-40 - 14-Bit 40 MSPS ADC, 5V, LQFP-48 | Analog Devices
MPN: AD9244BSTZ-40 ✓ فعالAD9244BSTZ-40 نمای کلی
An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that converts continuous analog voltages into discrete digital codes, serving as the critical bridge between the analog front end and the digital signal processing domain. The AD9244 belongs to the pipeline ADC family, which interleaves multiple low-resolution stages to achieve high sample rates while maintaining low power dissipation. In the broader component taxonomy, ADCs fall under data converters, which in turn are part of the signal chain and mixed-signal IC hierarchy within power management and signal processing subsystems.
Key differentiating features include 73 dBc SNR and 80 dBc SFDR at 40 MSPS, an integrated high-performance sample-and-hold that accepts differential or single-ended inputs, and a flexible CMOS-compatible digital output bus. The on-chip reference simplifies the external BOM, while the dc-coupled differential clock input supports backward compatibility with the legacy AD9226 single-pin clock scheme.
Architecturally, the AD9244 uses a multi-stage pipelined architecture with proprietary input SHA design, allowing it to maintain spurious-free dynamic range across the second and third Nyquist zones. The device operates from a single 5 V analog supply, drawing approximately 380 mW at 40 MSPS, with separate digital and analog grounds that must be joined at a single point on the PCB.
Typical applications include cellular basestation IF receivers, medical imaging front ends, instrumentation digitizers, and broadband communications where the device's wide analog input bandwidth makes it suitable for undersampling IF signals well above the Nyquist frequency. The wide input bandwidth also makes it a common choice for radar and sonar digitizer boards.
When designing with this ADC, pay close attention to analog input common-mode voltage and use a differential driver such as the AD8138 to maximize SFDR. Decouple AVDD and DRVDD supplies separately and route them with low-impedance ground pours to avoid coupling digital switching noise into the analog front end.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and PCB layout design notes not consolidated in the manufacturer datasheet, providing a practical reference for hardware engineers evaluating the AD9244BSTZ-40.
جایگزین‌های drop-in برای AD9244BSTZ-40 — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
AD9244BSTZ-65
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
AD9244BSTZ-40 حداکثر مقادیر مجاز و مشخصات الکتریکی
| رزولوشن | 14 bits |
| نرخ نمونه‌برداری | 40 MSPS |
| Number of Input Channels | 1 |
| Architecture | Pipelined |
| Input Type | Differential or Single-Ended |
| Analog Supply Voltage | 4.75 V to 5.25 V |
| Analog Input Bandwidth | 750 MHz |
| SNR | >73 dBc to Nyquist at 65 MSPS |
| SFDR | 80 dBc typical |
| On-chip Reference | Yes (internal) |
| Sample-and-Hold | Yes (integrated SHA) |
| Data Interface | Parallel CMOS |
| بسته‌بندی | 48-LQFP (7x7 mm) |
| نوع نصب | Surface Mount |
| سطح MSL | 3 (168 hours) |
| وضعیت RoHS | ROHS3 Compliant |
| REACH Status | REACH Unaffected |
| Lead-Free | Yes |
| 1ku List Price (Starting) | $34.73 |
پیکربندی پین AD9244BSTZ-40
| پین 1 | AVDD — Analog 5V supply |
| پین 2 | VREF — Voltage reference decoupling |
| پین 3 | CAPT — Reference decoupling capacitor |
| پین 4 | CAPB — Reference decoupling capacitor |
| پین 5 | VINA — Analog input A (positive) |
| پین 6 | VINB — Analog input B (negative) |
| پین 7 | AGND — Analog ground |
| پین 8 | AVDD — Analog 5V supply |
| پین 9 | CLK+ — Clock input positive |
| پین 10 | CLK- — Clock input negative |
| پین 11 | DRVDD — Digital 5V output supply |
| پین 12 | DRGND — Digital ground |
| پین 13 | D13 — Data output bit 13 (MSB) |
| پین 14 | D12 — Data output bit 12 |
| پین 15 | D11 — Data output bit 11 |
| پین 16 | D10 — Data output bit 10 |
| پین 17 | D9 — Data output bit 9 |
| پین 18 | D8 — Data output bit 8 |
| پین 19 | D7 — Data output bit 7 |
| پین 20 | D6 — Data output bit 6 |
| پین 21 | D5 — Data output bit 5 |
| پین 22 | D4 — Data output bit 4 |
| پین 23 | D3 — Data output bit 3 |
| پین 24 | D2 — Data output bit 2 |
| پین 25 | D1 — Data output bit 1 |
| پین 26 | D0 — Data output bit 0 (LSB) |
| پین 27 | OTR — Out-of-range indicator |
| پین 28 | DRVDD — Digital 5V output supply |
| پین 29 | DRGND — Digital ground |
| پین 30 | NC — Not connected (per datasheet) |
| پین 31 | NC — Not connected (per datasheet) |
| پین 32 | NC — Not connected (per datasheet) |
| پین 33 | NC — Not connected (per datasheet) |
| پین 34 | NC — Not connected (per datasheet) |
| پین 35 | NC — Not connected (per datasheet) |
| پین 36 | NC — Not connected (per datasheet) |
| پین 37 | NC — Not connected (per datasheet) |
| پین 38 | NC — Not connected (per datasheet) |
| پین 39 | NC — Not connected (per datasheet) |
| پین 40 | NC — Not connected (per datasheet) |
| پین 41 | NC — Not connected (per datasheet) |
| پین 42 | NC — Not connected (per datasheet) |
| پین 43 | NC — Not connected (per datasheet) |
| پین 44 | NC — Not connected (per datasheet) |
| پین 45 | AVDD — Analog 5V supply |
| پین 46 | AGND — Analog ground |
| پین 47 | AVDD — Analog 5V supply |
| پین 48 | AGND — Analog ground |
کاربردهای معمول
AD9244BSTZ-40 مناسب است برای 7 کاربردs: Cellular Basestation IF Receiver, Medical Imaging Digitizer, Industrial Instrumentation Data Acquisition, Broadband Communications Receiver, Radar and Sonar Signal Digitization, Portable Test and Measurement Equipment, Set-Top Box and Digital Video IF Sampling.
Cellular Basestation IF Receiver
The AD9244BSTZ-40 is well matched to cellular basestation IF receiver designs because of its 750 MHz full-power analog input bandwidth, which allows direct IF sampling of 70-200 MHz intermediate frequencies without preceding downconversion stages. At 40 MSPS, it covers the full GSM, CDMA, and WCDMA channel bandwidths. The 73 dBc SNR to Nyquist and 80 dBc SFDR support QPSK and 16-QAM demodulation with margin. The 5 V single-supply operation simplifies the basestation power tree. Place the ADC directly after the SAW filter and use an AD8138 differential driver to maximize SFDR; the AD9244 datasheet application section includes a complete IF sampling reference design.
پیشنهادی
Medical Imaging Digitizer
The AD9244BSTZ-40 is a strong candidate for medical ultrasound and MRI digitizer boards where 14-bit resolution at 40 MSPS provides sufficient dynamic range for tissue harmonic imaging and pre-beamform sampling. The wide analog input bandwidth allows direct sampling of ultrasound echo signals in the 1-15 MHz range. The internal sample-and-hold eliminates the need for an external SHA, reducing board area in compact probe-head assemblies. Per the AD9244 datasheet, SNR performance above 70 dBc supports penetration-depth dynamic range required for abdominal and cardiac imaging. Use a low-noise LDO for AVDD and provide a substantial ground pour under the analog inputs.
پیشنهادی
Industrial Instrumentation Data Acquisition
The AD9244BSTZ-40 suits high-channel-count industrial data acquisition systems where 14-bit resolution at 40 MSPS captures transient waveforms from vibration sensors, piezoelectric accelerometers, and high-speed process control signals. The parallel CMOS output simplifies FPGA or DSP interface with zero glue logic. Industrial users value the wide operating temperature range and ROHS3 compliance, while the integrated voltage reference reduces per-channel BOM cost. Per ADI documentation, the part is suitable for ATE (automatic test equipment) digitizer cards where hundreds of channels must share a common footprint.
پیشنهادی
Broadband Communications Receiver
The AD9244BSTZ-40's 750 MHz input bandwidth enables undersampling of broadband communications signals in software-defined radio and point-to-point microwave links. At 40 MSPS, it captures channel bandwidths up to 20 MHz, sufficient for many licensed microwave bands. The 14-bit dynamic range accommodates the high peak-to-average ratio of OFDM waveforms common in modern wireless systems. ADI's AD9244 datasheet provides reference clock distribution and PLL filtering guidance specific to broadband receivers. Pair with the AD9516 clock generator for jitter-cleaned sampling.
پیشنهادی
Radar and Sonar Signal Digitization
The AD9244BSTZ-40 is used in radar and sonar digitizer boards where 40 MSPS sampling and 750 MHz input bandwidth capture baseband or low-IF return signals with sufficient resolution for pulse compression. The 14-bit dynamic range supports high-clutter environments where target-to-clutter ratio demands wide spurious-free dynamic range. Per the AD9244 datasheet, the pipelined architecture provides consistent latency, simplifying beamforming across multiple synchronized channels. Use matched-length differential clock routing to maintain channel-to-channel phase coherence.
پیشنهادی
Portable Test and Measurement Equipment
The AD9244BSTZ-40 fits portable oscilloscope and spectrum analyzer designs requiring 14-bit resolution at 40 MSPS in a compact 48-LQFP footprint. The 7x7 mm package enables dense PCB layouts for multi-channel instruments. Combined with an FPGA downstream, the parallel CMOS output supports real-time FFT processing for spectrum analysis. The internal voltage reference eliminates an external component, reducing both BOM count and calibration complexity. Per ADI application notes, this ADC supports portable measurement tools where board area and power budget are constrained.
پیشنهادی
Set-Top Box and Digital Video IF Sampling
The AD9244BSTZ-40 supports IF sampling in legacy set-top box receivers and digital video broadcast demodulators. Its 750 MHz input bandwidth covers the 36-44 MHz cable TV IF band, allowing direct digitization without analog demodulation. At 14-bit resolution, it captures both analog and QAM digital channels with margin for signal variations. The single 5 V supply matches the existing set-top box power rails. Per the AD9244 datasheet, the CMOS output bus interfaces directly with MPEG decoder ASICs from earlier-generation designs.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای AD9244BSTZ-40 — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | AD9244BSTZ-65 |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Package | 48-LQFP (7x7) | 48-LQFP (7x7) - same |
| Resolution | 14 bits | 14 bits |
| Sampling Rate | 40 MSPS | 65 MSPS |
| Analog Supply Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
| Analog Input Bandwidth | 750 MHz | 750 MHz |
| SNR to Nyquist | >73 dBc at 65 MSPS | >73 dBc at 65 MSPS |
| On-chip Reference | Yes | Yes |
| RoHS Compliance | ROHS3 Compliant | ROHS3 Compliant |
تفاوت‌های کلیدی
- Wide 750 MHz analog input bandwidth enables IF undersampling without preceding downconversion (در مقابلAD9226BCPZ-40)
- 14-bit resolution provides 73 dBc SNR, suitable for cellular communications (در مقابلAD9226BCPZ-40)
- Single 5 V supply operation simplifies power tree design (در مقابلAD9226BCPZ-40)
یادداشت‌های طراحی
Decouple AVDD and DRVDD with separate 0.1 microfarad ceramic capacitors within 3 mm of each supply pin, plus a 10 microfarad tantalum bulk capacitor on each rail. If AVDD and DRVDD are tied to the same 5 V supply, place a ferrite bead between them to prevent digital switching noise from coupling into the analog front end. Per the AD9244 datasheet, total power dissipation at 40 MSPS is approximately 380 mW; ensure the supply can deliver at least 100 mA.
Route analog input traces as a 100-ohm differential pair with matched lengths to within 1 mm. Place a continuous ground pour under the analog inputs to provide a low-impedance return path for the input driver. Connect the analog and digital grounds at a single point near the ADC, typically at the exposed pad or AGND/DRGND pin pair. Avoid routing digital output traces (D0-D13, OTR) under the analog input section to minimize coupling.
For optimal SFDR performance, drive the analog inputs differentially using an AD8138 or similar ADC driver. Single-ended input operation reduces SFDR by 5-10 dBc compared to differential drive. Clock jitter directly degrades SNR; use a low-jitter clock source such as the AD9516 or a clean crystal oscillator. Estimated: clock jitter of 1 ps RMS at 40 MSPS limits SNR to approximately 68 dB - well below the 73 dBc datasheet spec.
Do not exceed the 5.25 V absolute maximum on AVDD or DRVDD. The OTR (out-of-range) output must be monitored by the downstream FPGA to detect input overload and prevent downstream signal processing errors. Per the AD9244 datasheet, the on-chip reference requires the CAPT and CAPB pins to be decoupled with 10 microfarad capacitors to AGND - omitting these capacitors degrades linearity and increases noise.
اطلاعات انطباق
ROHS3 compliant and REACH unaffected per partgenie.ai analysis as of 2026-10-06. Not AEC-Q100 qualified; this is an industrial/consumer grade ADC. Halogen-free status and conflict minerals declaration not stated in available web data.
