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Analog Devices Inc. AD9235BCPZ-65
- Part No.:
- AD9235BCPZ-65
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD9235BCPZ-65.pdf
- Description:
- IC ADC 12BIT PIPELINED 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,666
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Product details
Overview
AD9235BCPZ-65 from Analog Devices is a 12-bit, 65 MSPS monolithic analog-to-digital converter (ADC) with integrated sample-and-hold amplifier (SHA), on-chip voltage reference, and clock duty cycle stabilizer (DCS). 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 input up to 500 MHz bandwidth - used in IF sampling for CDMA-One and IMT-2000 baseband receivers.
For engineers reviewing the AD9235BCPZ-65 datasheet, AD9235BCPZ-65 pinout, AD9235BCPZ-65 application, or AD9235BCPZ-65 equivalent, key selection criteria include guaranteed no missing codes over –40°C to +85°C, flexible 1 Vp-p to 2 Vp-p input range, offset binary/twos complement output format, 7-cycle pipeline latency, and LFCSP-32 package compatibility with industrial-grade thermal performance (θJA = 32.5°C/W).
Technical Context
The AD9235BCPZ-65 employs a multistage differential pipelined architecture with output error correction logic to achieve 12-bit accuracy at 65 MSPS while ensuring no missing codes across temperature. Its patented SHA supports both differential and single-ended inputs, maintains <±0.4 LSB DNL, and sustains 70 dBc SNR up to 100 MHz input frequency.
A dedicated clock duty cycle stabilizer (DCS) compensates for wide clock pulse-width variation without degrading AC performance; digital outputs are driven by a separate DRVDD supply (2.25 V to 3.6 V) to interface with 2.5 V or 3.3 V logic families, and the OTR (out-of-range) flag provides overflow detection synchronized to the data stream.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees 4096 distinct output codes with no missing codes over full industrial temperature range. |
| Max Sample Rate | 65 MSPS - enables digitization of IF signals up to 32.5 MHz (Nyquist) with validated 70 dBc SNR performance. |
| SNR / SFDR | 70 dBc / 85 dBc to Nyquist - measured at fIN = 2.4 MHz, 65 MSPS, 2 Vp-p differential input; supports high-fidelity signal capture in communications receivers. |
| Power Consumption | 300 mW at 65 MSPS - split as 100 mA AVDD (3 V) and 7 mA DRVDD (2.5 V); standby power is 1.0 mW for low-power system states. |
| Analog Input Bandwidth | 500 MHz - supports wideband sampling including undersampling of RF/IF signals beyond Nyquist. |
| Differential Nonlinearity | ±0.4 LSB - ensures monotonic transfer function critical for closed-loop control and precision measurement systems. |
| Pipeline Latency | 7 cycles - fixed deterministic delay enabling precise timing alignment in synchronous digital signal processing chains. |
Pinout & Package
The AD9235BCPZ-65 is packaged in a 32-lead LFCSP (Lead Frame Chip Scale Package) with exposed paddle, optimized for thermal dissipation (θJA = 32.5°C/W) and high-density PCB layouts. The exposed paddle must be soldered to the ground plane for reliability and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Clock Input | Single-ended CMOS-compatible input controlling all conversion cycles; duty cycle stabilizer active for robust timing margin. |
| VIN+, VIN– | Differential Analog Input | High-bandwidth (500 MHz) fully differential input pair supporting 1 Vp-p to 2 Vp-p range; accepts single-ended signals via internal biasing. |
| D0–D11 | Parallel Digital Output | 12-bit straight binary or twos complement data bus; output drivers powered by DRVDD (2.25 V–3.6 V) for flexible logic interfacing. |
| OTR | Out-of-Range Indicator | Active-high flag signaling input overflow; used with MSB to distinguish low/high saturation conditions in real-time signal monitoring. |
| MODE | Data Format & DCS Control | Selects output format (offset binary/twos complement) and enables/disables clock duty cycle stabilizer function. |
| SENSE, VREF, REFT, REFB | Reference Interface | Supports internal 1.0 V or 0.5 V reference; external reference option via differential REFT/REFB pins with 7 kΩ input resistance. |
| AVDD, AGND, DGND, DRVDD | Power & Ground | Separate analog/digital supplies isolate noise; DRVDD decoupling requires 0.1 µF + 10 µF capacitors per datasheet layout guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Single 3 V supply operation | Eliminates dual-supply design complexity while maintaining 70 dBc SNR and 300 mW power at 65 MSPS. |
| On-chip SHA with 500 MHz bandwidth | Enables direct sampling of IF signals up to 100 MHz without external amplification or filtering in communications front-ends. |
| Integrated voltage reference | 1.0 V or 0.5 V internal reference with ±5 mV output error reduces BOM count and improves system-level accuracy vs. external references. |
| Flexible input range selection | 1 Vp-p to 2 Vp-p differential span accommodates varying signal chain gain stages without external attenuation or amplification. |
| Clock duty cycle stabilizer (DCS) | Compensates for >30% clock duty cycle variation while preserving 70 dBc SNR - critical for FPGA-driven or jitter-prone clock sources. |
Applications
| Ultrasound Imaging Front-End | CDMA-One Baseband Receiver |
|---|---|
Use Scenario: Digitizing echo return signals from piezoelectric transducers operating at 2–15 MHz carrier frequencies. IC Role / Device Role / Timing Role: High-speed ADC capturing time-domain ultrasound waveforms with minimal harmonic distortion for beamforming and image reconstruction. Use Value: 70 dBc SNR and 85 dBc SFDR preserve weak echo amplitudes amid strong near-field reflections; 65 MSPS supports 12-bit sampling of 10+ MHz bandwidth signals. |
Use Scenario: Intermediate frequency (IF) sampling in CDMA-One cellular base station receivers at 70–140 MHz. IC Role / Device Role / Timing Role: Direct IF digitization stage converting analog quadrature IF signals into digital baseband for DSP demodulation. Use Value: 500 MHz analog input bandwidth enables undersampling of 130 MHz IF signals; DCS ensures stable performance despite clock jitter from PLL synthesizers. |
| Battery-Powered Scopemeter | Low-Cost Digital Oscilloscope |
Use Scenario: Portable handheld instrument acquiring transient electrical waveforms with 100 MHz effective bandwidth. IC Role / Device Role / Timing Role: Core ADC in mixed-signal acquisition path, interfacing directly to front-end attenuators and anti-alias filters. Use Value: 300 mW power at 65 MSPS extends battery life; on-chip reference and SHA reduce external component count and board area. |
Use Scenario: Entry-level benchtop oscilloscope requiring ≥50 MS/s real-time sampling and ≥100 MHz analog bandwidth. IC Role / Device Role / Timing Role: Primary digitizer feeding FPGA-based trigger and memory management subsystems. Use Value: Guaranteed no missing codes and ±0.4 LSB DNL ensure accurate amplitude measurement across full dynamic range; LFCSP-32 package supports compact, thermally efficient layout. |
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-65 | 12-bit, 65 MSPS, but uses 1.8 V/3.3 V dual supply; no integrated reference; lower power (140 mW); no DCS. | Suitable for low-power, externally referenced systems where clock duty cycle is tightly controlled. | Choose AD9233BCPZ-65 when system already provides precision external reference and clock source has stable duty cycle. |
| ADS5272IPFP | 12-bit, 65 MSPS, 3.3 V supply only; includes JESD204B serial interface; higher power (520 mW); no on-chip reference. | Designed for high-channel-count, FPGA-connected systems requiring reduced pin count and deterministic latency. | Choose ADS5272IPFP when migrating to serial interface architecture or scaling to multi-channel synchronized acquisition. |
Compared with AD9235BCPZ-65, AD9233BCPZ-65 reduces power and simplifies supply sequencing but requires external reference and stable clock; ADS5272IPFP trades parallel interface simplicity for JESD204B scalability and FPGA integration - neither offers the same combination of integrated reference, DCS, and single 3 V supply.
Availability
AD9235BCPZ-65 is available at Aetrix Electronics and suitable for ultrasound imaging front-ends, CDMA-One baseband receivers, and battery-powered scopemeters requiring stable component supply with guaranteed long-term industrial temperature support.
Supply support for AD9235BCPZ-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 targets cost-sensitive, power-constrained communications and medical imaging systems requiring high-speed, high-accuracy digitization with minimal external components and robust industrial temperature operation.
FAQ
What is the maximum analog input frequency supported by the AD9235BCPZ-65?
The AD9235BCPZ-65 features a 500 MHz analog input bandwidth, enabling direct sampling of signals up to 100 MHz while maintaining 70 dBc SNR performance. This supports undersampling applications such as IF digitization in CDMA-One receivers where the input frequency exceeds the Nyquist rate of the 65 MSPS sampling clock.
Does the AD9235BCPZ-65 require an external voltage reference?
No, the AD9235BCPZ-65 includes an on-chip 1.0 V or 0.5 V reference with ±5 mV output error. External reference is optional via REFT/REFB pins, but most designs use the internal reference to reduce component count and improve system accuracy without external trimming.
How does the clock duty cycle stabilizer (DCS) function in the AD9235BCPZ-65?
The DCS in the AD9235BCPZ-65 actively corrects clock pulse-width asymmetry, allowing reliable operation even with duty cycles ranging from 30% to 70%. It preserves 70 dBc SNR and 85 dBc SFDR at 65 MSPS - a key advantage when driven by FPGA-generated clocks or PLLs with variable duty cycle.
What is the meaning of the OTR (out-of-range) signal on the AD9235BCPZ-65?
The OTR signal on the AD9235BCPZ-65 is an active-high flag indicating analog input overflow beyond the selected full-scale range. It synchronizes with the data output and, when combined with the MSB, distinguishes between low-side (negative saturation) and high-side (positive saturation) clipping events in real-time signal analysis.
Is the AD9235BCPZ-65 pin-compatible with other members of the AD9235 family?
Yes, the AD9235BCPZ-65 shares identical pinout and footprint with AD9235BCPZ-20 and AD9235BCPZ-40 in the same LFCSP-32 package. This allows hardware reuse across speed grades, simplifying design migration and inventory management for systems targeting multiple performance tiers.
AD9235BCPZ-65 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):
- 65M
- 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-65 FAQ
1.How can I place an order for AD9235BCPZ-65 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9235BCPZ-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 AD9235BCPZ-65 reliable?
The price and inventory of AD9235BCPZ-65 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9235BCPZ-65 is usually 5 days.
3.What payment methods are accepted for AD9235BCPZ-65?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9235BCPZ-65 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9235BCPZ-65?
AD9235BCPZ-65 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9235BCPZ-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 AD9235BCPZ-65?
For technical support, including AD9235BCPZ-65 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9235BCPZ-65 requirements.
6.How does Aetrix verify that AD9235BCPZ-65 is sourced from the original manufacturer or authorized distributors?
All AD9235BCPZ-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 AD9235BCPZ-65 meets industry standards.
7.What is the process for return or replacement of AD9235BCPZ-65?
All AD9235BCPZ-65 units undergo pre-shipment inspection (PSI). If there is an issue with AD9235BCPZ-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 AD9235BCPZ-65 part is unused and in its original packaging.
Return procedure for AD9235BCPZ-65:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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