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Analog Devices Inc. AD9235BCPZ-40
- Part No.:
- AD9235BCPZ-40
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD9235BCPZ-40.pdf
- Description:
- IC ADC 12BIT PIPELINED 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,617
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Product details
Overview
AD9235BCPZ-40 from Analog Devices is a 12-bit, 40 MSPS monolithic analog-to-digital converter (ADC) operating from a single 3 V supply (2.7 V to 3.6 V). It features a differential sample-and-hold amplifier with 500 MHz input bandwidth, on-chip reference, clock duty cycle stabilizer, and guarantees no missing codes over –40°C to +85°C. It delivers 70 dBc SNR and 85 dBc SFDR at Nyquist for IF sampling in communications receivers.
For engineers reviewing the AD9235BCPZ-40 datasheet, AD9235BCPZ-40 pinout, AD9235BCPZ-40 application, or AD9235BCPZ-40 equivalent, this page provides verified technical context, exact pin functions, real-world use cases in ultrasound and battery-powered instrumentation, and validated alternative parts for system-level design continuity.
Technical Context
The AD9235BCPZ-40 employs a multistage 1.5-bit pipeline architecture with output error correction logic to achieve 12-bit accuracy at 40 MSPS. Its differential SHA supports flexible analog input ranges (1 V p-p to 2 V p-p) and operates up to 100 MHz input frequency while maintaining ±0.4 LSB DNL and ±0.5 LSB INL across temperature.
A dedicated clock duty cycle stabilizer (DCS) compensates for wide pulse-width variations without degrading AC performance. Digital outputs are configurable in offset binary or twos complement format, with OTR flag indicating overflow beyond the selected input range - critical for real-time signal integrity monitoring in high-speed data acquisition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes for precise amplitude quantization in medical and comms systems. |
| Sampling Rate | 40 MSPS - supports Nyquist-limited IF sampling up to 20 MHz, suitable for CDMA-One and IS-95 baseband processing. |
| SNR / SFDR | 70 dBc / 85 dBc at Nyquist - enables clean spectral separation of adjacent channels in receiver front-ends. |
| Input Bandwidth | 500 MHz differential - allows wideband signal capture without external amplification in ultrasound beamforming. |
| Power Consumption | 165 mW at 40 MSPS - balances performance and thermal budget in handheld scopemeters and portable diagnostics. |
| Analog Supply | Single 3 V (2.7–3.6 V) - simplifies power architecture versus dual-supply ADCs and reduces BOM count. |
| Digital Driver Supply | DRVDD = 2.5 V or 3.3 V - ensures compatibility with FPGA or ASIC I/O standards without level-shifting. |
Pinout & Package
The AD9235BCPZ-40 is packaged in a 32-lead LFCSP (Lead Frame Chip Scale Package) with exposed paddle, optimized for thermal dissipation and high-frequency signal integrity in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Clock Input | Single-ended timing reference controlling all conversion cycles; accepts duty cycle variation due to internal DCS. |
| VIN+, VIN– | Differential Analog Input | High-bandwidth (500 MHz) input pair accepting 1–2 V p-p range; supports both differential and single-ended configurations via external biasing. |
| REFT, REFB | Differential Reference | Provides stable 1.0 V or 0.5 V reference span; enables precise full-scale definition independent of AVDD drift. |
| VREF | Reference I/O | Configurable as reference output (1.0 V/0.5 V) or external reference input; sets input span and noise floor. |
| OTR | Out-of-Range Flag | Active-high indicator signaling overflow beyond selected input range; used with MSB to distinguish low/high saturation. |
| MODE | Data Format & DCS Control | Selects offset binary/twos complement output and enables/disables clock duty cycle stabilizer. |
| SENSE | Reference Mode Selection | Determines internal reference voltage (1.0 V or 0.5 V); sets full-scale input range to 2 V p-p or 1 V p-p respectively. |
| D0–D11 | Parallel Digital Outputs | 12-bit parallel CMOS outputs; DRVDD-decoupled to support 2.5 V or 3.3 V logic families directly. |
| PDWN | Power-Down Control | Active-high signal reducing power to 1.0 mW; enables rapid wake-up (<3 ms) for burst-mode acquisition. |
| AVDD, AGND | Analog Power/Ground | Separate analog domain supply (3 V) and ground plane required to minimize noise coupling into sensitive analog path. |
| DRVDD, DGND | Digital Output Power/Ground | Independent digital driver supply decoupled with 0.1 µF + 10 µF capacitors; isolates switching noise from analog section. |
Key Features
| Feature | Design Value |
|---|---|
| Single 3 V supply operation | Eliminates need for negative or auxiliary supplies - reduces PCB layer count and improves reliability in portable instruments. |
| Differential input with 500 MHz bandwidth | Enables direct RF/IF sampling without intermediate amplification, preserving SNR in ultrasound transducer arrays. |
| On-chip reference and SHA | Removes external reference IC and op-amp buffer, cutting component count and layout sensitivity in space-constrained designs. |
| Flexible analog input range (1–2 V p-p) | Supports multiple sensor interfaces (e.g., piezoelectric transducers, mixer outputs) without redesigning front-end gain stages. |
| Clock duty cycle stabilizer (DCS) | Maintains full AC performance despite >40% duty cycle variation - relaxes clock generator requirements in FPGA-based systems. |
| No missing codes guaranteed | Ensures monotonicity and deterministic behavior in closed-loop control applications like real-time beam steering. |
Applications
| Ultrasound Equipment | IF Sampling in Communications Receivers |
|---|---|
Use Scenario: Digitizing echo signals from phased-array transducers operating at 2–15 MHz carrier frequencies. IC Role / Device Role / Timing Role: High-fidelity ADC capturing time-domain waveforms with minimal harmonic distortion for beamforming and Doppler processing. Use Value: 70 dBc SNR and 500 MHz input bandwidth preserve signal fidelity across wide dynamic range, enabling early detection of subtle tissue anomalies. |
Use Scenario: Downconverting and digitizing intermediate frequency (IF) signals in CDMA-One and IS-95 base stations. IC Role / Device Role / Timing Role: Direct IF sampling ADC converting 45–70 MHz bandpass signals at 40 MSPS for digital demodulation. Use Value: 85 dBc SFDR suppresses adjacent-channel interference, improving bit error rate in multi-user cellular environments. |
| Battery-Powered Instruments | Hand-Held Scopemeters |
Use Scenario: Portable diagnostic tools requiring long runtime and low thermal signature, such as ECG analyzers or impedance meters. IC Role / Device Role / Timing Role: Low-power 12-bit ADC acquiring physiological waveforms at ≤40 kSPS with oversampling capability. Use Value: 165 mW power consumption extends battery life while maintaining resolution sufficient for clinical-grade waveform analysis. |
Use Scenario: Compact field test equipment capturing transient electrical events up to 20 MHz bandwidth. IC Role / Device Role / Timing Role: Core sampling engine synchronizing trigger, memory buffer, and display subsystems in real time. Use Value: Pipeline latency of only 7 clock cycles enables accurate edge placement and jitter-free waveform reconstruction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9233BCPZ-40 | 12-bit, 40 MSPS, but uses 1.8 V digital supply (DRVDD) and lacks on-chip reference - requires external REF195 or ADR435. | Better suited for ultra-low-power systems where 1.8 V logic integration is mandatory; less ideal for rapid prototyping due to external reference dependency. | Choose AD9233BCPZ-40 only when system-level power budget mandates 1.8 V digital I/O and reference flexibility outweighs board area savings. |
| ADS5272IPFP | 12-bit, 40 MSPS, but offers 8-channel interleaved architecture and LVDS outputs - higher channel density but larger 64-pin HTQFP package. | Targeted at multi-channel acquisition (e.g., MRI front-ends), not single-channel IF sampling; LVDS interface increases routing complexity vs. CMOS. | Select ADS5272IPFP when scaling to ≥4 simultaneous analog inputs is required, and LVDS infrastructure already exists in the host processor. |
Compared with AD9235BCPZ-40, AD9233BCPZ-40 trades integrated reference for lower digital supply voltage, while ADS5272IPFP sacrifices single-channel simplicity for multi-channel throughput - making AD9235BCPZ-40 optimal for cost-sensitive, space-constrained, single-channel high-fidelity sampling.
Availability
AD9235BCPZ-40 is available at Aetrix Electronics and suitable for ultrasound equipment, IF sampling in communications receivers, and battery-powered instrumentation requiring stable component supply and industrial temperature grade (–40°C to +85°C).
Supply support for AD9235BCPZ-40 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD9235 family was designed specifically for medium-speed, high-resolution data acquisition in communications, medical imaging, and portable test equipment - prioritizing SNR, power efficiency, and ease of integration over raw speed.
FAQ
What is the maximum analog input frequency supported by the AD9235BCPZ-40?
The AD9235BCPZ-40 has a 500 MHz differential analog input bandwidth, allowing it to accurately digitize signals up to 100 MHz while maintaining specified SNR and SFDR performance. This makes AD9235BCPZ-40 suitable for undersampling applications such as IF digitization at 45–70 MHz in CDMA receivers, where aliasing is intentionally managed in the signal chain.
Does the AD9235BCPZ-40 require an external reference voltage?
No - the AD9235BCPZ-40 integrates a precision voltage reference that can be configured for either 1.0 V or 0.5 V output, setting the full-scale input range to 2 V p-p or 1 V p-p respectively. While AD9235BCPZ-40 supports external reference via the VREF pin, its on-chip reference eliminates the need for external components in most standard implementations.
How does the clock duty cycle stabilizer (DCS) function in the AD9235BCPZ-40?
The DCS in AD9235BCPZ-40 actively corrects clock pulse-width asymmetry to maintain optimal aperture jitter and SNR performance. It is enabled via the MODE pin and is functional only at the 40 MSPS and 65 MSPS variants - not active in the -20 version. For AD9235BCPZ-40, DCS ensures stable performance even with clock sources exhibiting 30–70% duty cycle variation.
What is the meaning of the OTR (Out-of-Range) signal on the AD9235BCPZ-40?
The OTR signal on AD9235BCPZ-40 is an active-high flag indicating that the analog input exceeded the selected full-scale range - either above +VFS/2 or below –VFS/2. When asserted, OTR works with the MSB to distinguish between high and low overflow conditions, enabling robust clipping detection in real-time signal processing pipelines using AD9235BCPZ-40.
Is the AD9235BCPZ-40 pin-compatible with other members of the AD9235 family?
Yes - all AD9235 variants (AD9235BCPZ-20, AD9235BCPZ-40, AD9235BCPZ-65) share identical 32-lead LFCSP pinouts and footprint. This allows drop-in replacement across sampling rates without PCB revision, provided thermal and power delivery margins accommodate the higher current draw of the -65 variant.
AD9235BCPZ-40 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad, CSP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 40M
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.25V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 32-LFCSP-VQ (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD9235BCPZ-40 FAQ
1.How can I place an order for AD9235BCPZ-40 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9235BCPZ-40 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD9235BCPZ-40 reliable?
The price and inventory of AD9235BCPZ-40 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9235BCPZ-40 is usually 5 days.
3.What payment methods are accepted for AD9235BCPZ-40?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9235BCPZ-40 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9235BCPZ-40?
AD9235BCPZ-40 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9235BCPZ-40 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD9235BCPZ-40?
For technical support, including AD9235BCPZ-40 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9235BCPZ-40 requirements.
6.How does Aetrix verify that AD9235BCPZ-40 is sourced from the original manufacturer or authorized distributors?
All AD9235BCPZ-40 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD9235BCPZ-40 meets industry standards.
7.What is the process for return or replacement of AD9235BCPZ-40?
All AD9235BCPZ-40 units undergo pre-shipment inspection (PSI). If there is an issue with AD9235BCPZ-40, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD9235BCPZ-40 part is unused and in its original packaging.
Return procedure for AD9235BCPZ-40:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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