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Analog Devices Inc. AD9235BCPZRL7-20
- Part No.:
- AD9235BCPZRL7-20
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD9235BCPZRL7-20.pdf
- Description:
- IC ADC 12BIT PIPELINED 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,237
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Product details
Overview
AD9235BCPZRL7-20 from Analog Devices is a 12-bit, 20 MSPS analog-to-digital converter (ADC) with single 3 V supply operation (2.7 V to 3.6 V), differential input bandwidth up to 500 MHz, on-chip SHA and reference, DNL = ±0.4 LSB, and industrial temperature range (–40°C to +85°C). It serves as the front-end digitizer in ultrasound equipment and IF sampling receivers.
For engineers reviewing the AD9235BCPZRL7-20 datasheet, AD9235BCPZRL7-20 pinout, AD9235BCPZRL7-20 application, or AD9235BCPZRL7-20 equivalent, this page delivers verified specifications, package mapping, functional pin roles, real-world use cases, and validated alternative options for signal chain design and component selection.
Technical Context
The AD9235BCPZRL7-20 implements a multistage differential pipelined architecture with output error correction logic to guarantee 12-bit accuracy and no missing codes across its full operating temperature range. Its patented sample-and-hold amplifier supports both differential and single-ended inputs with user-selectable 1 Vp-p or 2 Vp-p ranges.
A dedicated clock duty cycle stabilizer (DCS) is disabled in the -20 variant per datasheet Table 3, distinguishing it from the -40/-65 versions. Digital outputs are configurable in offset binary or twos complement format, driven by a separate DRVDD supply (2.25 V to 3.6 V) compatible with 2.5 V or 3.3 V logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees 4096 distinct digital codes over full-scale input range |
| Max Sample Rate | 20 MSPS - defines maximum sustained conversion throughput without performance degradation |
| Supply Voltage | 2.7 V to 3.6 V AVDD - single analog supply simplifies power rail design vs. dual-supply ADCs |
| DNL | ±0.4 LSB - ensures monotonicity and absence of missing codes in all operating conditions |
| Input Bandwidth | 500 MHz - enables high-frequency IF sampling and wideband signal acquisition |
| SNR @ 2.4 MHz | 70.8 dBc - determines minimum detectable signal amplitude above quantization and thermal noise floor |
| Power Dissipation | 90 mW DC input - low static power supports battery-powered and thermally constrained systems |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including medical and communications infrastructure |
Pinout & Package
The AD9235BCPZRL7-20 is packaged in a 32-lead LFCSP (Lead Frame Chip Scale Package) with exposed paddle, optimized for thermal performance and high-density PCB layouts. Pin count and footprint match the AD9235BCPZ series family.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Clock Input | Single-ended timing reference controlling all internal conversion cycles; no DCS active in -20 variant |
| VIN+, VIN– | Differential Analog Input | High-bandwidth (500 MHz) input pair accepting 1 Vp-p or 2 Vp-p signals with common-mode flexibility |
| D0–D11 | Parallel Digital Output | 12-bit straight binary or twos complement data bus; latched on CLK edge with 7-cycle pipeline latency |
| OTR | Out-of-Range Indicator | Active-high flag signaling overflow beyond selected input span; used with MSB to distinguish high/low saturation |
| MODE | Data Format & Mode Control | Configures output coding (offset binary/twos complement); no DCS enable function in -20 version |
| SENSE, VREF, REFT, REFB | Reference Interface | Supports internal 1.0 V or 0.5 V reference; external reference option via SENSE pin; differential reference inputs |
| AVDD, AGND | Analog Power/Ground | 3 V analog supply domain; requires separate decoupling from digital domains to maintain SNR performance |
| DRVDD, DGND | Digital Output Supply/Ground | Independent 2.5 V/3.3 V driver supply enabling interface to mixed-voltage logic systems |
| PDWN | Power-Down Control | Active-high signal reducing power to 1.0 mW; wake-up time ≤3 ms with recommended 0.1 µF + 10 µF decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Single 3 V supply operation | Eliminates need for dual ±5 V or split-rail supplies, reducing BOM count and layout complexity |
| No missing codes guaranteed | Ensures deterministic behavior in closed-loop control and real-time processing applications |
| On-chip SHA and reference | Removes external op-amp and voltage reference components, shrinking solution size and calibration effort |
| Flexible analog input range | 1 Vp-p or 2 Vp-p selection adapts to varying signal chain gain stages without external attenuation |
| Separate digital driver supply | DRVDD independence allows direct interfacing to FPGA I/O banks or microcontroller GPIOs at 2.5 V or 3.3 V |
| Industrial temperature rating | Validated operation from –40°C to +85°C supports deployment in uncontrolled environments like field instruments |
Applications
| Ultrasound Equipment | IF Sampling Receivers |
|---|---|
|
Use Scenario: Digitizing RF echo signals from piezoelectric transducers after bandpass filtering and variable-gain amplification. IC Role / Device Role / Timing Role: Primary ADC capturing 5–15 MHz analog IF waveforms with <70 dBc SNR and minimal harmonic distortion. Use Value: 500 MHz input bandwidth preserves pulse fidelity; 12-bit resolution enables precise time-of-flight calculation for imaging depth accuracy. |
Use Scenario: Downconverting and digitizing intermediate frequency signals in CDMA-One and IMT-2000 base stations. IC Role / Device Role / Timing Role: High-fidelity IF sampling ADC operating at Nyquist zone 1 or 2, supporting multi-carrier detection. Use Value: SFDR ≥80 dBc at 32.5 MHz prevents adjacent-channel interference; low 90 mW power eases thermal management in dense RF modules. |
| 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 front-end ADC enabling 20 MSPS capture while maintaining >69 dBc SNR at 2.4 MHz. Use Value: 90 mW DC power consumption extends battery life; single 3 V supply eliminates level-shifting circuitry. |
Use Scenario: Compact field test tools performing real-time waveform analysis with FFT-based diagnostics. IC Role / Device Role / Timing Role: Time-domain digitizer feeding FPGA-based signal processing pipelines with deterministic 7-cycle latency. Use Value: Pipeline delay consistency enables precise trigger alignment; OTR flag supports automatic range adjustment during auto-scaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog-to-digital conversion applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9235BCPZ-20 | Same silicon, non-tape-and-reel packaging; no built-in reel logistics support for automated assembly | Preferred for prototyping and low-volume evaluation; lacks moisture-sensitive level (MSL) compliance for high-volume SMT lines | Select AD9235BCPZRL7-20 for production runs requiring tape-and-reel delivery and J-STD-020 MSL3 compliance. |
| AD9214BRSZ-65 | 10-bit, 65 MSPS ADC in 28-lead TSSOP; higher speed but lower resolution and no on-chip reference | Suitable for cost-sensitive, high-throughput applications where 10-bit precision suffices (e.g., basic spectrum monitoring) | Choose AD9235BCPZRL7-20 when 12-bit accuracy, integrated reference, and industrial temp range are mandatory. |
Compared with AD9235BCPZ-20, the RL7 variant adds tape-and-reel packaging and MSL3 handling for SMT production; versus AD9214BRSZ-65, it trades speed for resolution, on-chip reference, and superior SNR-making it optimal for precision IF digitization where dynamic range outweighs raw sample rate.
Availability
AD9235BCPZRL7-20 is available at Aetrix Electronics and suitable for ultrasound equipment, IF sampling receivers, and battery-powered instruments requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for AD9235BCPZRL7-20 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 product line delivers monolithic, low-power, high-speed ADCs targeting medical imaging, wireless infrastructure, and portable instrumentation where resolution, SNR, and integration are critical.
FAQ
What is the maximum input frequency supported by the AD9235BCPZRL7-20?
The AD9235BCPZRL7-20 features a 500 MHz differential input bandwidth, enabling accurate sampling of analog signals up to 100 MHz while maintaining 68.3 dBc SNR. This bandwidth supports undersampling architectures and high-Nyquist-zone IF digitization in communications systems without external amplification or filtering.
Does the AD9235BCPZRL7-20 include an on-chip voltage reference?
Yes, the AD9235BCPZRL7-20 integrates a precision voltage reference with selectable 0.5 V or 1.0 V output modes. Reference accuracy is ±5 mV (1 V mode) and ±2.5 mV (0.5 V mode), and it supports external reference override via the SENSE pin for improved system-level accuracy.
What is the power consumption of the AD9235BCPZRL7-20 at 20 MSPS?
At 20 MSPS with DC input, the AD9235BCPZRL7-20 consumes 90 mW total (IAVDD ≈ 30 mA, IDRVDD ≈ 2 mA). With a full-scale sine-wave input, power rises to 95 mW. In standby mode, power drops to 1.0 mW, making it suitable for intermittent acquisition systems.
Is the AD9235BCPZRL7-20 pin-compatible with other members of the AD9235 family?
Yes, the AD9235BCPZRL7-20 shares identical 32-lead LFCSP pinout and functionality with AD9235BCPZ-20, AD9235BCPZ-40, and AD9235BCPZ-65. All variants use the same footprint, register map, and interface protocol-only maximum sample rate and DCS capability differ between speed grades.
What digital output formats does the AD9235BCPZRL7-20 support?
The AD9235BCPZRL7-20 supports both offset binary and twos complement data formats, selected via the MODE pin. Output data is parallel 12-bit (D0–D11), with OTR flag indicating overflow. Data is valid after a fixed 7-cycle pipeline latency relative to the CLK edge.
AD9235BCPZRL7-20 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 20M
- 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-WQ (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD9235BCPZRL7-20 FAQ
1.How can I place an order for AD9235BCPZRL7-20 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9235BCPZRL7-20 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 AD9235BCPZRL7-20 reliable?
The price and inventory of AD9235BCPZRL7-20 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9235BCPZRL7-20 is usually 5 days.
3.What payment methods are accepted for AD9235BCPZRL7-20?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9235BCPZRL7-20 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9235BCPZRL7-20?
AD9235BCPZRL7-20 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9235BCPZRL7-20 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 AD9235BCPZRL7-20?
For technical support, including AD9235BCPZRL7-20 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9235BCPZRL7-20 requirements.
6.How does Aetrix verify that AD9235BCPZRL7-20 is sourced from the original manufacturer or authorized distributors?
All AD9235BCPZRL7-20 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 AD9235BCPZRL7-20 meets industry standards.
7.What is the process for return or replacement of AD9235BCPZRL7-20?
All AD9235BCPZRL7-20 units undergo pre-shipment inspection (PSI). If there is an issue with AD9235BCPZRL7-20, 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 AD9235BCPZRL7-20 part is unused and in its original packaging.
Return procedure for AD9235BCPZRL7-20:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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