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Analog Devices Inc. AD9235BCP-65
- Part No.:
- AD9235BCP-65
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD9235BCP-65.pdf
- Description:
- IC ADC 12BIT 65MSPS 32-LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:11,929
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Product details
Overview
AD9235BCP-65 from Analog Devices is a 12-bit, 65 MSPS monolithic analog-to-digital converter (ADC) with integrated sample-and-hold amplifier and on-chip voltage reference. It operates from a single 3 V supply (2.7 V to 3.6 V), delivers 70 dBc SNR and 85 dBc SFDR at Nyquist, consumes 300 mW, and supports differential analog inputs up to 500 MHz bandwidth - enabling high-fidelity IF sampling in communications receivers.
For engineers reviewing the AD9235BCP-65 datasheet, AD9235BCP-65 pinout, AD9235BCP-65 application, or AD9235BCP-65 equivalent, this page provides verified technical context, exact pin functions, real-world use cases in ultrasound and battery-powered instrumentation, and two validated alternative ADCs for system-level design continuity.
Technical Context
The AD9235BCP-65 employs a multistage differential pipelined architecture with output error correction logic to guarantee 12-bit accuracy and no missing codes across –40°C to +85°C. Its patented SHA supports both differential and single-ended input configurations with user-selectable 1 Vp-p or 2 Vp-p ranges.
A dedicated clock duty cycle stabilizer (DCS) maintains performance across wide input clock duty cycle variations, while the OTR (out-of-range) flag signals overflow conditions for real-time signal monitoring. Digital outputs are configurable in offset binary or twos complement format, driven by a separate DRVDD supply (2.25 V to 3.6 V) for compatibility with 2.5 V or 3.3 V logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees 4096 discrete digital codes with no missing codes over full temperature range. |
| Max Sample Rate | 65 MSPS - enables digitization of IF signals up to 32.5 MHz (Nyquist) without aliasing. |
| SNR @ 65 MSPS | 70 dBc to Nyquist - ensures ≥11.4 ENOB for high-fidelity signal capture in ultrasound and comms. |
| SFDR @ 65 MSPS | 85 dBc to Nyquist - suppresses spurious tones critical for CDMA-One and IMT-2000 baseband processing. |
| Power Consumption | 300 mW at 65 MSPS - reduces thermal load and extends battery life in handheld scopemeters. |
| Analog Input Bandwidth | 500 MHz - supports wideband RF/IF sampling and undersampling applications beyond Nyquist. |
| Differential Nonlinearity | ±0.4 LSB max - ensures monotonic transfer function essential for closed-loop control and medical imaging. |
| Aperture Uncertainty | 0.5 ps rms - minimizes sampling jitter-induced noise floor degradation at high input frequencies. |
Pinout & Package
The AD9235BCP-65 is packaged in a 32-lead LFCSP (Lead Frame Chip Scale Package) with exposed paddle, optimized for thermal dissipation and high-frequency analog integrity. Pin 1 is located at the top-left corner adjacent to the marking dot; the exposed paddle must be soldered to AGND for optimal EMI suppression and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Clock Input | Single-ended timing reference controlling all conversion cycles; DCS active only on -65 variant. |
| VIN+, VIN– | Differential Analog Input | High-bandwidth (500 MHz) input pair accepting 1 Vp-p or 2 Vp-p differential signals. |
| REFT, REFB | Differential Reference | Provides precise 1.0 V or 0.5 V reference span; SENSE pin selects mode. |
| VREF | Reference I/O | Configurable as internal reference output or external reference input (1.0 V or 0.5 V). |
| MODE | Data Format & DCS Control | Selects offset binary/twos complement output and enables/disables clock duty cycle stabilizer. |
| OTR | Out-of-Range Flag | Active-high indicator signaling analog input exceeding selected full-scale range. |
| D0–D11 | Parallel Digital Outputs | 12-bit parallel CMOS outputs referenced to DRVDD; support 2.5 V or 3.3 V logic levels. |
| PDWN | Power-Down Control | Active-high signal reducing power to 1.0 mW; wake-up time ≤3 ms with recommended decoupling. |
| AVDD, AGND | Analog Power/Ground | 3.0 V ±10% analog supply; separate ground plane required to isolate analog noise from digital domains. |
| DRVDD, DGND | Digital Output Supply/Ground | Independent 2.5 V or 3.3 V driver supply; decoupling with 0.1 µF + 10 µF capacitors mandatory. |
Key Features
| Feature | Design Value |
|---|---|
| Single 3 V supply operation | Eliminates dual-supply complexity and reduces BOM count in portable medical and test equipment. |
| On-chip reference and SHA | Removes need for external precision reference and high-speed op-amp, simplifying layout and calibration. |
| Flexible analog input range | Supports 1 Vp-p or 2 Vp-p differential inputs via VREF/SENSE configuration - adaptable to sensor or mixer output levels. |
| Low power at 65 MSPS | 300 mW total consumption enables thermally constrained designs like hand-held scopemeters and battery-powered instruments. |
| DCS with wide duty cycle tolerance | Compensates for non-50% clock waveforms without degrading SNR/SFDR - critical for FPGA-driven or jittery clock sources. |
| Guaranteed no missing codes | Ensures monotonicity across industrial temperature range (–40°C to +85°C), vital for position feedback and safety-critical systems. |
Applications
| Ultrasound Imaging | IF Sampling in Communications Receivers |
|---|---|
|
Use Scenario: Digitizing 5–15 MHz echo return signals from piezoelectric transducers in portable ultrasound systems. IC Role / Device Role / Timing Role: High-speed ADC capturing baseband or low-IF ultrasound data with minimal quantization noise and distortion. Use Value: 70 dBc SNR preserves tissue contrast resolution; 500 MHz input bandwidth accommodates harmonics and broadband beamforming. |
Use Scenario: Downconverting and digitizing CDMA-One or IMT-2000 intermediate frequency signals in cellular base stations. IC Role / Device Role / Timing Role: IF-sampling ADC converting 45–70 MHz bandpass signals directly to digital domain for DSP demodulation. Use Value: 85 dBc SFDR suppresses adjacent-channel interference; 65 MSPS rate supports multi-carrier WCDMA channel bandwidths. |
| Battery-Powered Instruments | Hand-Held Scopemeters |
|
Use Scenario: Portable oscilloscopes and spectrum analyzers requiring extended runtime on Li-ion batteries. IC Role / Device Role / Timing Role: Low-power, high-performance ADC enabling real-time waveform capture without active cooling. Use Value: 300 mW at 65 MSPS reduces thermal load and extends battery life; 12-bit resolution supports 4096-point FFT analysis. |
Use Scenario: Field-deployable diagnostic tools measuring transient electrical events in industrial automation and power electronics. IC Role / Device Role / Timing Role: Precision ADC capturing fast edge transitions and harmonic content in motor drives and inverters. Use Value: ±0.4 LSB DNL ensures accurate amplitude measurement of distorted waveforms; OTR flag detects overvoltage faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9233BCP-65 | 12-bit, 65 MSPS, but uses 3.3 V AVDD and lacks on-chip reference; requires external REF. | Higher power (380 mW), lower SNR (69.5 dBc), and no DCS - less suitable for battery-powered or jitter-prone clock environments. | Choose when external reference control is preferred and board space allows extra components. |
| ADS5271IPFP | 12-bit, 65 MSPS, 3.3 V supply, integrated LVDS outputs, and higher SFDR (88 dBc), but no on-chip SHA or reference. | Requires external front-end amplification and reference; LVDS interface increases routing complexity vs. CMOS parallel outputs. | Prefer for high-noise environments where differential signaling improves noise immunity and timing margin. |
Compared with AD9235BCP-65, AD9233BCP-65 trades integration for flexibility, while ADS5271IPFP prioritizes noise robustness over ease of analog interface - making AD9235BCP-65 optimal for compact, self-contained IF sampling and portable medical designs.
Availability
AD9235BCP-65 is available at Aetrix Electronics and suitable for ultrasound imaging systems, IF sampling in communications receivers, and battery-powered instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature grade performance.
Supply support for AD9235BCP-65 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 cost-sensitive, power-constrained high-speed digitization in medical ultrasound, wireless infrastructure, and portable test equipment - emphasizing integration, low power, and guaranteed performance across temperature.
FAQ
What is the maximum analog input frequency supported by the AD9235BCP-65?
The AD9235BCP-65 features a 500 MHz analog input bandwidth, enabling direct sampling of IF signals up to 100 MHz while maintaining 68.3 dBc SNR. This supports undersampling architectures in communications and radar, where input frequencies exceed the Nyquist rate of the 65 MSPS clock.
Does the AD9235BCP-65 require an external voltage reference?
No - the AD9235BCP-65 integrates a precision voltage reference that can be configured for 0.5 V or 1.0 V output. The SENSE pin selects the mode, and REFT/REFB pins provide differential reference connections. External reference is optional but not required for standard operation.
How does the clock duty cycle stabilizer (DCS) function in the AD9235BCP-65?
The DCS in the AD9235BCP-65 actively corrects input clock duty cycle deviations to maintain ADC performance. It is enabled via the MODE pin and is unique to the -65 variant - not present in AD9235BRU/BCP-20 or -40. This allows reliable operation with FPGA-generated clocks or other non-50% duty cycle sources.
What is the purpose of the OTR (out-of-range) pin on the AD9235BCP-65?
The OTR pin on the AD9235BCP-65 is an active-high flag indicating analog input overflow beyond the selected full-scale range. Used with the MSB (D11), it distinguishes between high and low overflow conditions - critical for automatic gain control and signal clipping detection in ultrasound and comms receivers.
Can the AD9235BCP-65 operate with a 2.5 V digital output supply?
Yes - the AD9235BCP-65 supports DRVDD from 2.25 V to 3.6 V, including 2.5 V. Its digital outputs meet CMOS specifications at 2.5 V (e.g., VOL ≤ 0.2 V at IOL = 1.6 mA), ensuring compatibility with 2.5 V FPGAs and ASICs without level-shifting circuitry.
AD9235BCP-65 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad, CSP
- Packaging:
- Bag
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 65M
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- Parallel
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 3
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 32-LFCSP-VQ (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD9235BCP-65 FAQ
1.How can I place an order for AD9235BCP-65 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9235BCP-65 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 AD9235BCP-65 reliable?
The price and inventory of AD9235BCP-65 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9235BCP-65 is usually 5 days.
3.What payment methods are accepted for AD9235BCP-65?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9235BCP-65 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9235BCP-65?
AD9235BCP-65 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9235BCP-65 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 AD9235BCP-65?
For technical support, including AD9235BCP-65 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9235BCP-65 requirements.
6.How does Aetrix verify that AD9235BCP-65 is sourced from the original manufacturer or authorized distributors?
All AD9235BCP-65 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 AD9235BCP-65 meets industry standards.
7.What is the process for return or replacement of AD9235BCP-65?
All AD9235BCP-65 units undergo pre-shipment inspection (PSI). If there is an issue with AD9235BCP-65, 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 AD9235BCP-65 part is unused and in its original packaging.
Return procedure for AD9235BCP-65:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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