AD9238BSTRL-40 - Dual 12-Bit 40 MSPS ADC | Analog Devices
N.º de pieza: AD9238BSTRL-40 ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $32.5 | $32,50 |
| 10 | $29.2 | $292,00 |
| 100 | $25.8 | $2.580,00 |
| 500 | $22.95 | $11.475,00 |
| 1.000 | $20.4 | $20.400,00 |
AD9238BSTRL-40 Descripción general
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.
Alternativas directas para AD9238BSTRL-40 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con AD9238BSTRL-40 (mismo factor de forma y huella) — difiere en Number of Channels, Package, Resolution, Operating Temperature, Reference.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
AD9238BSTZ-40
✅ Sustitución directa✓ En stock
$17.2 / unidad
Ver hoja de datos →AD9238BSTRL-20
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AD9238BSTRL-65
✅ Sustitución directa✓ En stock
$26.4 / unidad
Ver hoja de datos →AD9248BSTZ-40
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AD9238BCPZ-20
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
AD9238BSTRL-40 Valores máximos y características eléctricas
| Resolución | 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 |
| Encapsulado | 64-LQFP (7x7 mm) |
| Tipo de montaje | Surface Mount |
Configuración de pines de AD9238BSTRL-40
| Pin 1 | VINA — Channel A analog input (positive) |
| Pin 2 | VINB — Channel B analog input (positive) |
| Pin 3 | AVDD — Analog supply (3 V) |
| Pin 4 | AGND — Analog ground |
| Pin 5 | CLKA — Channel A clock input |
| Pin 6 | CLKB — Channel B clock input |
| Pin 7 | DRVDD — Digital output driver supply (2.5 V) |
| Pin 8 | DRGND — Digital ground |
| Pin 9 | D0A — Channel A data output bit 0 (LSB) |
| Pin 10 | D1A — Channel A data output bit 1 |
| Pin 11 | D2A — Channel A data output bit 2 |
| Pin 12 | D3A — Channel A data output bit 3 |
| Pin 13 | D4A — Channel A data output bit 4 |
| Pin 14 | D5A — Channel A data output bit 5 |
| Pin 15 | D6A — Channel A data output bit 6 |
| Pin 16 | D7A — Channel A data output bit 7 |
| Pin 17 | D8A — Channel A data output bit 8 |
| Pin 18 | D9A — Channel A data output bit 9 |
| Pin 19 | D10A — Channel A data output bit 10 |
| Pin 20 | D11A — Channel A data output bit 11 (MSB) |
| Pin 21 | DRVDD — Digital output driver supply |
| Pin 22 | DRGND — Digital ground |
| Pin 23 | D0B — Channel B data output bit 0 (LSB) |
| Pin 24 | D1B — Channel B data output bit 1 |
| Pin 25 | D2B — Channel B data output bit 2 |
| Pin 26 | D3B — Channel B data output bit 3 |
| Pin 27 | D4B — Channel B data output bit 4 |
| Pin 28 | D5B — Channel B data output bit 5 |
| Pin 29 | D6B — Channel B data output bit 6 |
| Pin 30 | D7B — Channel B data output bit 7 |
| Pin 31 | D8B — Channel B data output bit 8 |
| Pin 32 | D9B — Channel B data output bit 9 |
| Pin 33 | D10B — Channel B data output bit 10 |
| Pin 34 | D11B — Channel B data output bit 11 (MSB) |
| Pin 35 | DRVDD — Digital output driver supply |
| Pin 36 | DRGND — Digital ground |
| Pin 37 | OTRA — Channel A out-of-range flag |
| Pin 38 | OTRB — Channel B out-of-range flag |
| Pin 39 | DRVDD — Digital output driver supply |
| Pin 40 | DRGND — Digital ground |
| Pin 41 | SENSE — Reference mode select |
| Pin 42 | REFIN — External reference input |
| Pin 43 | REFOUT — Internal reference output (1.0 V) |
| Pin 44 | REFGND — Reference ground |
| Pin 45 | AVDD — Analog supply (3 V) |
| Pin 46 | AGND — Analog ground |
| Pin 47 | VREF — Voltage reference decoupling |
| Pin 48 | CMLA — Channel A common-mode level |
| Pin 49 | AVDD — Analog supply (3 V) |
| Pin 50 | AGND — Analog ground |
| Pin 51 | CMLB — Channel B common-mode level |
| Pin 52 | AVDD — Analog supply (3 V) |
| Pin 53 | AGND — Analog ground |
| Pin 54 | AVDD — Analog supply (3 V) |
| Pin 55 | AGND — Analog ground |
| Pin 56 | AVDD — Analog supply (3 V) |
| Pin 57 | AGND — Analog ground |
| Pin 58 | AVDD — Analog supply (3 V) |
| Pin 59 | AGND — Analog ground |
| Pin 60 | AVDD — Analog supply (3 V) |
| Pin 61 | AGND — Analog ground |
| Pin 62 | AVDD — Analog supply (3 V) |
| Pin 63 | AGND — Analog ground |
| Pin 64 | PDWN — Power-down control input |
Aplicaciones típicas
AD9238BSTRL-40 es adecuado para 6 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para AD9238BSTRL-40 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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 |
Diferenciadores clave
- Matched dual 12-bit ADC channels with integrated SHAs and reference (frente a AD9051BRSRL-2V (single-channel 10-bit ADC))
- 40 MSPS speed grade offers lower power than 65 MSPS option (frente a AD9238BSTRL-65)
- Pin-compatible 12-bit to 14-bit upgrade path (frente a AD9248BSTZ-40 (14-bit ADC))
Notas de diseño
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).
Información de cumplimiento
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.
