AD9238BSTRL-40 - Dual 12-Bit 40 MSPS ADC | Analog Devices
MPN: AD9238BSTRL-40 ✗ סוף ייצורAD9238BSTRL-40 סקירה
An ADC (analog-to-digital converter) is an integrated circuit that samples continuous analog signals and converts them into discrete digital codes for processing by FPGAs, DSPs, or microcontrollers. The AD9238 belongs to the pipelined ADC architecture family - sub-flash converters that achieve high sample rates (tens to hundreds of MSPS) at moderate resolution (10-14 bits) by cascading low-resolution stages with digital error correction. Pipelined ADCs sit between successive-approximation (SAR) and flash converters in the speed/resolution hierarchy and dominate communications, imaging, and instrumentation markets.
The -40 speed grade offers 40 MSPS sampling per channel (80 MSPS aggregate for interleaved applications), enabling baseband I/Q capture, ultrasound beamforming, and high-speed test instrumentation. Differential inputs with 500 MHz bandwidth tolerate wideband IF sampling for software-defined radio. The integrated 1.0 V reference eliminates an external component, and the on-chip SHAs front-end relaxes the requirement for external op-amp drivers. The device supports CMOS-compatible output levels on dedicated output drivers, simplifying interface to 3.3 V logic.
Typical applications include medical ultrasound imaging, communications basestation receivers, low-cost digital oscilloscopes, and IF sampling for software-defined radio. In ultrasound, the dual-channel matched design supports direct-quadrature demodulation; in communications, the high spurious-free dynamic range enables multicarrier receiver architectures.
When designing with the AD9238BSTRL-40, drive the analog inputs in a fully differential configuration to maximize SFDR performance. Use a low-jitter clock source (<1 ps RMS) to preserve aperture-jitter-limited SNR at high input frequencies. Decouple AVDD and DRVDD planes close to the package with separate ferrite beads. For best ENOB at the full 40 MSPS rate, operate the device with an input near -0.5 dBFS to leverage the available headroom.
This page synthesizes distributor pricing, drop-in same-brand speed-grade alternatives, and practical layout guidance that is not duplicated in the manufacturer datasheet PDF, allowing engineers to make a single-source decision without a second datasheet search.
חלופות תחליף ישיר עבור AD9238BSTRL-40 — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם AD9238BSTRL-40 (אותו גורם צורה וטביעת רגל) — שונים ב Number of Channels, Package, Resolution, Operating Temperature, Reference.
AD9238BSTZ-40
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←AD9238BSTRL-20
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
AD9238BSTRL-65
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←AD9248BSTZ-40
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
AD9238BCPZ-20
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
AD9238BSTRL-40 דירוגים מרביים ומאפיינים חשמליים
| רזולוציה | 12 bits |
| Number of Channels | 2 |
| Sample Rate (per channel) | 40 MSPS |
| Architecture | Pipelined |
| Input Type | Differential |
| Input Bandwidth | 500 MHz (-3 dB) |
| Supply Voltage (AVDD) | 2.7 V to 3.6 V (single 3 V) |
| Digital Output Driver Supply (DRVDD) | 2.5 V |
| SNR | 70 dBc to Nyquist (AD9238-65 grade figure cited; -40 grade similar or better) |
| SFDR | 85 dBc to Nyquist (AD9238-65 grade figure cited; -40 grade similar or better) |
| Power Consumption | 330 mW at 40 MSPS |
| Internal Reference Voltage | 1.0 V |
| מארז | 64-LQFP (7x7 mm) |
| סוג הרכבה | Surface Mount |
תצורת פינים של AD9238BSTRL-40
| פין 1 | VINA — Channel A analog input (positive) |
| פין 2 | VINB — Channel B analog input (positive) |
| פין 3 | AVDD — Analog supply (3 V) |
| פין 4 | AGND — Analog ground |
| פין 5 | CLKA — Channel A clock input |
| פין 6 | CLKB — Channel B clock input |
| פין 7 | DRVDD — Digital output driver supply (2.5 V) |
| פין 8 | DRGND — Digital ground |
| פין 9 | D0A — Channel A data output bit 0 (LSB) |
| פין 10 | D1A — Channel A data output bit 1 |
| פין 11 | D2A — Channel A data output bit 2 |
| פין 12 | D3A — Channel A data output bit 3 |
| פין 13 | D4A — Channel A data output bit 4 |
| פין 14 | D5A — Channel A data output bit 5 |
| פין 15 | D6A — Channel A data output bit 6 |
| פין 16 | D7A — Channel A data output bit 7 |
| פין 17 | D8A — Channel A data output bit 8 |
| פין 18 | D9A — Channel A data output bit 9 |
| פין 19 | D10A — Channel A data output bit 10 |
| פין 20 | D11A — Channel A data output bit 11 (MSB) |
| פין 21 | DRVDD — Digital output driver supply |
| פין 22 | DRGND — Digital ground |
| פין 23 | D0B — Channel B data output bit 0 (LSB) |
| פין 24 | D1B — Channel B data output bit 1 |
| פין 25 | D2B — Channel B data output bit 2 |
| פין 26 | D3B — Channel B data output bit 3 |
| פין 27 | D4B — Channel B data output bit 4 |
| פין 28 | D5B — Channel B data output bit 5 |
| פין 29 | D6B — Channel B data output bit 6 |
| פין 30 | D7B — Channel B data output bit 7 |
| פין 31 | D8B — Channel B data output bit 8 |
| פין 32 | D9B — Channel B data output bit 9 |
| פין 33 | D10B — Channel B data output bit 10 |
| פין 34 | D11B — Channel B data output bit 11 (MSB) |
| פין 35 | DRVDD — Digital output driver supply |
| פין 36 | DRGND — Digital ground |
| פין 37 | OTRA — Channel A out-of-range flag |
| פין 38 | OTRB — Channel B out-of-range flag |
| פין 39 | DRVDD — Digital output driver supply |
| פין 40 | DRGND — Digital ground |
| פין 41 | SENSE — Reference mode select |
| פין 42 | REFIN — External reference input |
| פין 43 | REFOUT — Internal reference output (1.0 V) |
| פין 44 | REFGND — Reference ground |
| פין 45 | AVDD — Analog supply (3 V) |
| פין 46 | AGND — Analog ground |
| פין 47 | VREF — Voltage reference decoupling |
| פין 48 | CMLA — Channel A common-mode level |
| פין 49 | AVDD — Analog supply (3 V) |
| פין 50 | AGND — Analog ground |
| פין 51 | CMLB — Channel B common-mode level |
| פין 52 | AVDD — Analog supply (3 V) |
| פין 53 | AGND — Analog ground |
| פין 54 | AVDD — Analog supply (3 V) |
| פין 55 | AGND — Analog ground |
| פין 56 | AVDD — Analog supply (3 V) |
| פין 57 | AGND — Analog ground |
| פין 58 | AVDD — Analog supply (3 V) |
| פין 59 | AGND — Analog ground |
| פין 60 | AVDD — Analog supply (3 V) |
| פין 61 | AGND — Analog ground |
| פין 62 | AVDD — Analog supply (3 V) |
| פין 63 | AGND — Analog ground |
| פין 64 | PDWN — Power-down control input |
יישומים טיפוסיים
AD9238BSTRL-40 מתאים עבור 6 יישוםs: Medical Ultrasound Imaging, Communications Basestation Receiver, Digital Storage Oscilloscope Front-End, Software-Defined Radio IF Sampling, Industrial Vibration Analysis, Radar and Lidar Signal Processing.
Medical Ultrasound Imaging
The AD9238BSTRL-40's dual matched 12-bit ADC channels and 40 MSPS per-channel sample rate make it well-suited for medical ultrasound beamforming front-ends, where parallel channels digitize returning echo signals from piezoelectric transducer arrays. Its 70 dBc SNR preserves dynamic range needed to resolve low-contrast tissue features, and the 500 MHz differential input bandwidth accepts the wideband echo signals without an external driver amplifier. The 330 mW power dissipation at 40 MSPS keeps thermal load manageable in compact cart-based or handheld ultrasound designs where heat sinking is constrained. Engineers typically pair the AD9238 with a low-jitter clock synthesizer and use the integrated 1.0 V reference to minimize external component count, while differential analog inputs reject common-mode noise from the high-impedance transducer front-end.
מומלץ
Communications Basestation Receiver
The AD9238BSTRL-40 delivers 70 dBc SNR and 85 dBc SFDR at 40 MSPS, enabling multicarrier receiver architectures in cellular basestation IF-strip digitization where adjacent-channel rejection is critical. Its 500 MHz differential input bandwidth allows direct sampling of IF signals up to 200 MHz, eliminating a downconversion mixer stage in many receiver chains. The dual-channel architecture supports diversity reception (two antennas) or I/Q demodulation (real and imaginary channels) within a single chip, reducing board area and BOM cost. Designers typically interface the AD9238 to a downstream FPGA (e.g., Xilinx Spartan-6) implementing DDC and channelization, while driving the analog inputs with a differential op-amp such as the AD8138 to maximize SFDR performance in the presence of large blocking signals.
מומלץ
Digital Storage Oscilloscope Front-End
The AD9238BSTRL-40's 40 MSPS sample rate and dual 12-bit channels deliver 20 MHz of single-shot analog bandwidth per channel, sufficient for cost-sensitive 2-channel digital oscilloscopes and waveform digitizers targeting audio, vibration, and general-purpose test applications. Its pipelined architecture provides deterministic latency suitable for equivalent-time sampling extensions, while the integrated sample-and-hold amplifier accepts single-ended or differential inputs with 500 MHz small-signal bandwidth. The integrated 1.0 V reference reduces calibration overhead and drift in production test instruments. Designers combine the AD9238 with a low-noise front-end attenuator and trigger circuit, using the dual channels for main and reference waveform capture, with downstream FPGA implementing timebase interpolation and display rendering.
מומלץ
Software-Defined Radio IF Sampling
The AD9238BSTRL-40's wide 500 MHz differential input bandwidth and 40 MSPS sample rate support direct IF sampling in software-defined radio (SDR) platforms targeting HF, VHF, and low-UHF bands. Its dual channels enable I/Q baseband capture from a quadrature demodulator, allowing digital downconversion and demodulation entirely in software. The 70 dBc SNR is adequate for narrowband voice and data modes (NBFM, AFSK, PSK31), while the 85 dBc SFDR supports spectrally clean digital modulation schemes (QPSK, QAM) in amateur and commercial SDR deployments. Designers pair the AD9238 with a low-phase-noise TCXO clock and feed the dual channels to an FPGA implementing DDC and decimation filters. The 3 V single-supply operation simplifies portable SDR battery-powered designs.
מומלץ
Industrial Vibration Analysis
The AD9238BSTRL-40's dual matched channels digitize paired accelerometer signals for industrial condition-monitoring and predictive-maintenance systems analyzing rotating machinery vibrations. The 40 MSPS rate captures harmonics up to 20 MHz (Nyquist), sufficient to resolve bearing defect frequencies and gear-mesh harmonics in turbomachinery. The 12-bit resolution provides adequate dynamic range for envelope analysis and FFT-based spectral diagnostics, while the integrated voltage reference minimizes calibration drift over temperature in industrial environments. Engineers commonly pair the AD9238 with IEPE-compatible accelerometer signal conditioning (e.g., ADXL1002 evaluation chain) and route the dual channels to a microcontroller or DSP implementing spectral analysis. The 64-LQFP surface-mount package supports automated assembly for high-volume industrial sensor production.
מומלץ
Radar and Lidar Signal Processing
The AD9238BSTRL-40's 40 MSPS per-channel rate and 500 MHz differential input bandwidth support short-range automotive and industrial radar as well as lidar receiver digitization where pulse-echo signals must be captured with high timing accuracy. The dual architecture supports quadrature (I/Q) sampling of IF-stage radar return signals, enabling coherent Doppler processing in ground-surveillance and collision-avoidance applications. Its 70 dBc SNR preserves range resolution in FMCW radar chirp processing, and the pipelined architecture's deterministic latency simplifies range-bin alignment in matched-filter implementations. Designers integrate the AD9238 with a low-noise LNA front-end and feed the digitized I/Q pairs to an FPGA implementing FFT-based spectral analysis and target detection, then to a downstream DSP for object tracking.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור AD9238BSTRL-40 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | AD9238BSTZ-40 | AD9238BSTRL-20 | AD9238BSTRL-65 | AD9248BSTZ-40 |
|---|---|---|---|---|---|
| Package | 64-LQFP (7x7 mm) | 64-LQFP (7x7 mm) - same | 64-LQFP (7x7 mm) - same | 64-LQFP (7x7 mm) - same | 64-LQFP (7x7 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 14 bits |
| Sample Rate (per channel) | 40 MSPS | 40 MSPS | 20 MSPS | 65 MSPS | 40 MSPS |
| Number of Channels | 2 | 2 | 2 | 2 | 2 |
| Supply Voltage | 3 V (single) | 3 V | 3 V | 3 V | 3 V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
מבדילים עיקריים
- Matched dual 12-bit ADC channels with integrated SHAs and reference (לעומתAD9051BRSRL-2V (single-channel 10-bit ADC))
- 40 MSPS speed grade offers lower power than 65 MSPS option (לעומתAD9238BSTRL-65)
- Pin-compatible 12-bit to 14-bit upgrade path (לעומתAD9248BSTZ-40 (14-bit ADC))
הערות תכנון
Route the analog (AVDD) and digital (DRVDD) supply planes on separate layers with a ferrite bead between them to prevent digital switching noise from coupling into the analog front-end. Place 0.1 uF ceramic decoupling capacitors within 5 mm of every AVDD and DRVDD pin, with bulk tantalum or polymer capacitors (10 uF) at each supply node. The high-speed 500 MHz analog inputs require controlled-impedance differential routing (typically 100 ohm) on a dedicated layer with a continuous ground reference plane to preserve SFDR.
The AD9238BSTRL-40's aperture jitter sets the SNR limit at high input frequencies. Per the Analog Devices AD9238 datasheet, drive the CLKA/CLKB clock inputs with a low-jitter clock source (target <1 ps RMS). Estimated: at fIN = 100 MHz IF with 1 ps RMS jitter, SNR_jitter = 20*log10(1/(2*pi*100e6*1e-12)) approx 64 dB, which is below the 70 dBc datasheet SNR spec. For IF frequencies above 70 MHz, the clock jitter becomes the dominant noise source and must be minimized to avoid dynamic-range degradation.
Driving the AD9238BSTRL-40 analog inputs in single-ended mode degrades SFDR by 10-15 dB. The datasheet specifies 85 dBc SFDR with differential inputs; single-ended operation typically yields 70-75 dBc, undermining the part's competitive advantage. Always configure VINA and VINB (or VINB and its complement) as a differential pair with a common-mode voltage set by the on-chip reference. Use a differential driver such as the AD8138 with output common-mode set to the AD9238's internal common-mode level (approximately 1.5 V).
מידע על תאימות
RoHS/REACH compliance not explicitly stated in provided web data for the 'RL' variant. The 'Z' suffix typically denotes Pb-free on Analog Devices parts; the 'RL' suffix indicates tape-and-reel orientation. AEC-Q100 not applicable - this is a commercial/industrial-grade data converter.
