AD9238BSTRL-40 - Dual 12-Bit 40 MSPS ADC | Analog Devices
MPN: AD9238BSTRL-40 ✗ Akhir HidupAD9238BSTRL-40 Ringkasan
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.
Alternatif penggantian untuk AD9238BSTRL-40 — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian AD9238BSTRL-40 (sama faktor bentuk dan footprint) — berbeda di dalam Number of Channels, Package, Resolution, Operating Temperature, Reference.
AD9238BSTZ-40
✅ Drop-InKontak untuk harga
Lihat Datasheet →AD9238BSTRL-20
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
AD9238BSTRL-65
✅ Drop-InKontak untuk harga
Lihat Datasheet →AD9248BSTZ-40
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
AD9238BCPZ-20
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
AD9238BSTRL-40 Rating Maksimal & Karakteristik Listrik
| Resolusi | 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 |
| Paket | 64-LQFP (7x7 mm) |
| Tipe Mounting | Surface Mount |
Konfigurasi Pin AD9238BSTRL-40
| Pin produk 1 | VINA — Channel A analog input (positive) |
| Pin produk 2 | VINB — Channel B analog input (positive) |
| Pin produk 3 | AVDD — Analog supply (3 V) |
| Pin produk 4 | AGND — Analog ground |
| Pin produk 5 | CLKA — Channel A clock input |
| Pin produk 6 | CLKB — Channel B clock input |
| Pin produk 7 | DRVDD — Digital output driver supply (2.5 V) |
| Pin produk 8 | DRGND — Digital ground |
| Pin produk 9 | D0A — Channel A data output bit 0 (LSB) |
| Pin produk 10 | D1A — Channel A data output bit 1 |
| Pin produk 11 | D2A — Channel A data output bit 2 |
| Pin produk 12 | D3A — Channel A data output bit 3 |
| Pin produk 13 | D4A — Channel A data output bit 4 |
| Pin produk 14 | D5A — Channel A data output bit 5 |
| Pin produk 15 | D6A — Channel A data output bit 6 |
| Pin produk 16 | D7A — Channel A data output bit 7 |
| Pin produk 17 | D8A — Channel A data output bit 8 |
| Pin produk 18 | D9A — Channel A data output bit 9 |
| Pin produk 19 | D10A — Channel A data output bit 10 |
| Pin produk 20 | D11A — Channel A data output bit 11 (MSB) |
| Pin produk 21 | DRVDD — Digital output driver supply |
| Pin produk 22 | DRGND — Digital ground |
| Pin produk 23 | D0B — Channel B data output bit 0 (LSB) |
| Pin produk 24 | D1B — Channel B data output bit 1 |
| Pin produk 25 | D2B — Channel B data output bit 2 |
| Pin produk 26 | D3B — Channel B data output bit 3 |
| Pin produk 27 | D4B — Channel B data output bit 4 |
| Pin produk 28 | D5B — Channel B data output bit 5 |
| Pin produk 29 | D6B — Channel B data output bit 6 |
| Pin produk 30 | D7B — Channel B data output bit 7 |
| Pin produk 31 | D8B — Channel B data output bit 8 |
| Pin produk 32 | D9B — Channel B data output bit 9 |
| Pin produk 33 | D10B — Channel B data output bit 10 |
| Pin produk 34 | D11B — Channel B data output bit 11 (MSB) |
| Pin produk 35 | DRVDD — Digital output driver supply |
| Pin produk 36 | DRGND — Digital ground |
| Pin produk 37 | OTRA — Channel A out-of-range flag |
| Pin produk 38 | OTRB — Channel B out-of-range flag |
| Pin produk 39 | DRVDD — Digital output driver supply |
| Pin produk 40 | DRGND — Digital ground |
| Pin produk 41 | SENSE — Reference mode select |
| Pin produk 42 | REFIN — External reference input |
| Pin produk 43 | REFOUT — Internal reference output (1.0 V) |
| Pin produk 44 | REFGND — Reference ground |
| Pin produk 45 | AVDD — Analog supply (3 V) |
| Pin produk 46 | AGND — Analog ground |
| Pin produk 47 | VREF — Voltage reference decoupling |
| Pin produk 48 | CMLA — Channel A common-mode level |
| Pin produk 49 | AVDD — Analog supply (3 V) |
| Pin produk 50 | AGND — Analog ground |
| Pin produk 51 | CMLB — Channel B common-mode level |
| Pin produk 52 | AVDD — Analog supply (3 V) |
| Pin produk 53 | AGND — Analog ground |
| Pin produk 54 | AVDD — Analog supply (3 V) |
| Pin produk 55 | AGND — Analog ground |
| Pin produk 56 | AVDD — Analog supply (3 V) |
| Pin produk 57 | AGND — Analog ground |
| Pin produk 58 | AVDD — Analog supply (3 V) |
| Pin produk 59 | AGND — Analog ground |
| Pin produk 60 | AVDD — Analog supply (3 V) |
| Pin produk 61 | AGND — Analog ground |
| Pin produk 62 | AVDD — Analog supply (3 V) |
| Pin produk 63 | AGND — Analog ground |
| Pin produk 64 | PDWN — Power-down control input |
Aplikasi Umum
AD9238BSTRL-40 cocok untuk 6 aplikasis: 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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk AD9238BSTRL-40 — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | 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 |
Diferensiator Kunci
- Matched dual 12-bit ADC channels with integrated SHAs and reference (vsAD9051BRSRL-2V (single-channel 10-bit ADC))
- 40 MSPS speed grade offers lower power than 65 MSPS option (vsAD9238BSTRL-65)
- Pin-compatible 12-bit to 14-bit upgrade path (vsAD9248BSTZ-40 (14-bit ADC))
Catatan Desain
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).
Informasi Konformitas
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.
