AD9237BCPZRL7-20 - 12-Bit 20 MSPS 3V Low Power ADC | Analog Devices
MPN: AD9237BCPZRL7-20 ✓ פעילAD9237BCPZRL7-20 סקירה
An ADC is a data converter that transforms continuous analog input signals into discrete digital codes for downstream processing by DSPs, FPGAs, or microcontrollers. The AD9237 family sits at the interface between the analog front-end (amplifiers, filters, sensors) and the digital signal-processing chain, and belongs to the broader category of Nyquist-rate, switched-capacitor, pipeline ADCs. The pipeline architecture uses multiple low-resolution flash stages with inter-stage residue gain and digital error correction, achieving both high sample rate and low latency while consuming milliwatts of power.
Key features include a differential analog input stage with selectable input spans from 1 V p-p to 4 V p-p, an on-chip high-performance sample-and-hold amplifier (SHA), an internal 1.0 V voltage reference, and a CMOS-compatible output stage with an Output Enable pin for bus multiplexing. The ADC consumes only 65 mW typical at 20 MSPS with AVDD = 3 V, making it one of the lowest-power 12-bit ADCs of its speed class. The pin-compatible AD9235 (12-bit, 20/40/65 MSPS) further simplifies system migration paths and reduces design complexity across product generations.
The AD9237 uses a differential switched-capacitor pipeline core with proprietary SHA architecture that minimizes distortion at the front-end and supports a wide common-mode input range, allowing direct DC-coupling from differential drivers such as the AD8138 or AD8352. The on-chip bandgap reference and reference buffer maintain low temperature drift, and the Output Enable pin allows multiple ADCs to share a digital bus, simplifying board routing in multi-channel systems.
Typical applications include portable and battery-powered imaging systems, medical ultrasound front-ends, low-cost I/Q baseband digitizers, hand-held oscilloscope input channels, and industrial inspection cameras. The wide input range scaling also makes it suitable for IF sampling in software-defined radio receivers.
When designing with the AD9237BCPZRL7-20, ensure the analog and digital grounds are star-connected to the exposed pad thermal/epitaxy paddle, which must be soldered to a low-impedance ground plane for electrical performance and thermal dissipation. Use a differential input drive topology with a balun or fully differential amplifier for optimum SFDR, and decouple AVDD and DRVDD with 0.1 uF and 10 uF ceramic capacitors placed within a few millimeters of each supply pin.
חלופות תחליף ישיר עבור AD9237BCPZRL7-20 — 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 AD9237BCPZRL7-20 (אותו גורם צורה וטביעת רגל) — שונים ב Architecture, Package, Analog Input Type, Analog Supply Voltage (AVDD), DNL.
AD9235BCPZRL7-20
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
AD9237BCPZ-40
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
AD9237BCPZ-65
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←AD9237BCPZ-20
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←AD9629BCPZRL7-20
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
AD9237BCPZRL7-20 דירוגים מרביים ומאפיינים חשמליים
| רזולוציה | 12 bits |
| Sample Rate (Grade -20) | 20 MSPS |
| Family Maximum Sample Rate | 65 MSPS |
| Architecture | Pipelined, single-channel |
| Number of Inputs | 1 |
| Analog Supply Voltage (AVDD) | 3 V |
| Digital Output Supply (DRVDD) | 2.5 V |
| Differential Input Span | 1 V p-p to 4 V p-p (selectable) |
| DNL (Differential Nonlinearity) | ±0.7 LSB |
| SNR to Nyquist (at 65 MSPS) | 66 dBc |
| SFDR to Nyquist (at 65 MSPS) | 80 dBc |
| Power Consumption at 20 MSPS | 65 mW typical |
| Input Type | Differential |
| Reference | Internal 1.0 V (external optional) |
| Output Enable Pin | Yes (for bus multiplexing) |
| מארז | 32-LFCSP-WQ (5 mm x 5 mm) with exposed pad |
| סוג הרכבה | Surface Mount |
| סטטוס RoHS | Compliant |
תצורת פינים של AD9237BCPZRL7-20
| פין 1 | AVDD — Analog supply voltage (3 V) |
| פין 2 | AIN+ — Differential analog input positive |
| פין 3 | AIN- — Differential analog input negative |
| פין 4 | VREF — Voltage reference input/output (1.0 V internal) |
| פין 5 | AGND — Analog ground |
| פין 6 | SENSE — Reference mode select (internal/external) |
| פין 7 | DRVDD — Digital output driver supply (2.5 V) |
| פין 8 | DRGND — Digital ground |
| פין 9 | D0 — Data output bit 0 (LSB) |
| פין 10 | D1 — Data output bit 1 |
| פין 11 | D2 — Data output bit 2 |
| פין 12 | D3 — Data output bit 3 |
| פין 13 | D4 — Data output bit 4 |
| פין 14 | D5 — Data output bit 5 |
| פין 15 | D6 — Data output bit 6 |
| פין 16 | D7 — Data output bit 7 |
| פין 17 | D8 — Data output bit 8 |
| פין 18 | D9 — Data output bit 9 |
| פין 19 | D10 — Data output bit 10 |
| פין 20 | D11 — Data output bit 11 (MSB) |
| פין 21 | OTR — Out-of-range indicator |
| פין 22 | DRVDD — Digital output driver supply (2.5 V) |
| פין 23 | CLK+ — Clock input positive |
| פין 24 | CLK- — Clock input negative (complementary) |
| פין 25 | AGND — Analog ground |
| פין 26 | AVDD — Analog supply voltage (3 V) |
| פין 27 | PDWN — Power-down control (active high) |
| פין 28 | OE — Output enable (active high, for bus multiplexing) |
| פין 29 | AGND — Analog ground |
| פין 30 | AVDD — Analog supply voltage (3 V) |
| פין 31 | DRGND — Digital ground |
| פין 32 | EP — Exposed pad (connect to AGND/DRGND) |
יישומים טיפוסיים
AD9237BCPZRL7-20 מתאים עבור 6 יישוםs: Portable Medical Ultrasound Imaging, Industrial Inspection Cameras and Machine Vision, Handheld Oscilloscope Input Channels, IF Sampling in Software-Defined Radio Receivers, Battery-Powered Data Acquisition Systems, Low-Cost Multi-Channel Ultrasound Beamformer.
Portable Medical Ultrasound Imaging
The AD9237BCPZRL7-20's 12-bit resolution, 20 MSPS sample rate, and 65 mW typical power consumption make it well-suited for handheld and portable ultrasound imaging front-ends where per-channel power budget is critical. Multi-channel arrays parallel multiple AD9237 devices with the Output Enable pin simplifying bus multiplexing; the selectable 1-4 V p-p differential input range accommodates the variable output levels from ultrasound preamplifiers without external attenuators. Unlike higher-speed ADCs, the -20 grade keeps thermal load low across 32+ channel probe heads, extending battery runtime in cart-based systems.
מומלץ
Industrial Inspection Cameras and Machine Vision
The AD9237BCPZRL7-20 provides the 12-bit dynamic range and 20 MSPS throughput needed to digitize CCD/CIS sensor outputs in line-scan and area-scan industrial inspection cameras. The 66 dBc SNR to Nyquist preserves subtle intensity gradients critical for defect detection, while the LFCSP-32 (5x5 mm) footprint fits compact camera head enclosures. The differential input stage rejects common-mode noise from factory floor environments, and the Output Enable pin allows pixel-synchronous bus arbitration when multiple ADCs share a controller bus.
מומלץ
Handheld Oscilloscope Input Channels
Battery-powered handheld oscilloscopes benefit from the AD9237BCPZRL7-20's 65 mW power dissipation and 20 MSPS sample rate, which extends battery life while delivering 12-bit vertical resolution for low-amplitude waveform capture. The selectable 1-4 V p-p input range allows direct coupling from front-end attenuators without intermediate gain stages, simplifying BOM and reducing calibration complexity. The LFCSP-32 package with exposed pad provides low thermal resistance for sustained acquisition bursts in compact handheld form factors.
מומלץ
IF Sampling in Software-Defined Radio Receivers
The AD9237BCPZRL7-20's 12-bit resolution and 20 MSPS sample rate make it suitable for low-IF sampling in narrowband SDR receivers, including Ham radio, public-safety, and shortwave applications. The 80 dBc SFDR preserves spurious-free dynamic range needed for weak-signal demodulation, and the differential input stage rejects common-mode LO leakage. Its lower sample rate (vs the -65 grade) reduces power consumption, which is critical for portable SDR designs where battery life and heat dissipation dominate design trade-offs.
מומלץ
Battery-Powered Data Acquisition Systems
Portable field data acquisition systems (DAQ) in environmental monitoring, structural health, and remote telemetry leverage the AD9237BCPZRL7-20's 65 mW typical power consumption and 20 MSPS sample rate to digitize sensor signals while extending battery life over multi-day field deployments. The 12-bit resolution is sufficient for vibration, strain gauge, and temperature-sensor digitisation, while the LFCSP-32 footprint fits pocket-sized form factors. The Output Enable pin enables bus sharing between multiple ADC instances for synchronized multi-channel acquisition.
מומלץ
Low-Cost Multi-Channel Ultrasound Beamformer
The AD9237BCPZRL7-20 enables low-cost beamformer front-ends in diagnostic ultrasound by combining its 12-bit vertical resolution with low per-channel power at 20 MSPS. Designers can parallel 16, 32, or 64 AD9237 devices with shared digital buses using the Output Enable pin for time-multiplexed data transfer to a downstream FPGA. The selectable 1-4 V p-p input range accommodates TGC (time-gain-compensated) transducer signals without range switching, and the small 5x5 mm LFCSP package supports dense array layouts.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור AD9237BCPZRL7-20 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | AD9235BCPZRL7-20 | AD9237BCPZ-40 | AD9237BCPZ-65 | AD9237BCPZ-20 | AD9629BCPZRL7-20 |
|---|---|---|---|---|---|---|
| Package | 32-LFCSP-WQ (5x5) | 32-LFCSP-WQ (5x5) - same | 32-LFCSP-WQ (5x5) - same | 32-LFCSP-WQ (5x5) - same | 32-LFCSP-WQ (5x5) - same | 32-LFCSP (5x5) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Sample Rate | 20 MSPS | 20 MSPS | 40 MSPS | 65 MSPS | 20 MSPS | 20 MSPS |
| Analog Supply Voltage | 3 V | 3 V | 3 V | 3 V | 3 V | 3 V |
| Power Consumption | 65 mW at 20 MSPS | 65 mW at 20 MSPS | 135 mW at 40 MSPS | 190 mW at 65 MSPS | 65 mW at 20 MSPS | 70 mW at 20 MSPS |
| Differential Input Span | 1 V p-p to 4 V p-p | Fixed (per AD9235 datasheet) | 1 V p-p to 4 V p-p | 1 V p-p to 4 V p-p | 1 V p-p to 4 V p-p | 1 V p-p to 4 V p-p |
| Output Enable Pin | Yes | Yes | Yes | Yes | Yes | Yes |
מבדילים עיקריים
- Lowest power consumption in the AD9237 family at 20 MSPS grade (לעומתAD9237BCPZ-65)
- Pin-compatible upgrade path for AD9235 designs (לעומתAD9235BCPZRL7-20)
- Output Enable pin enables bus multiplexing (לעומתNon-bus-enabled ADCs)
הערות תכנון
The 32-LFCSP-WQ package uses an exposed thermal pad (EP, pin 32) that MUST be soldered to a low-impedance analog ground plane on the PCB. Use 0.1 uF and 10 uF ceramic decoupling capacitors placed within 2-3 mm of each AVDD and DRVDD pin pair. Star-connect analog and digital grounds at the EP to prevent digital switching noise from coupling into the analog front-end.
Drive the ADC with a differential amplifier such as AD8138 or AD8352 for optimum SFDR (80 dBc to Nyquist). Use a balun if single-ended-to-differential conversion is acceptable and adequate. Route the CLK+/CLK- differential clock traces as a matched-length, impedance-controlled pair (typically 100 ohm differential) and keep them short to minimize jitter.
Do not exceed the maximum analog input swing beyond 4 V p-p differential, as this will cause saturation and degrade linearity. Always enable the internal reference (SENSE pin tied to AGND) or apply a clean external reference to VREF - floating SENSE will cause unstable reference voltage. The Output Enable (OE) pin must be driven high for normal operation; leaving it floating may cause unpredictable output behavior.
מידע על תאימות
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified - this is a commercial/industrial grade ADC. Halogen-free status not explicitly confirmed in available data.
