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Analog Devices Inc. AD9238BCPZ-40
- Part No.:
- AD9238BCPZ-40
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD9238BCPZ-40.pdf
- Description:
- IC ADC 12BIT PIPELINED 64LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,293
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Product details
Overview
AD9238BCPZ-40 from Analog Devices is a dual-channel, 12-bit, 40 MSPS analog-to-digital converter (ADC) fabricated in advanced CMOS. It features integrated sample-and-hold amplifiers, on-chip voltage reference, and differential analog inputs with 500 MHz bandwidth. Operating from a single 3 V supply (2.7–3.6 V), it delivers 70.4 dB SNR and 80.5 dBc SFDR at 9.7 MHz input, targeting IF sampling in wireless receivers and ultrasound front-ends.
For engineers reviewing the AD9238BCPZ-40 datasheet, AD9238BCPZ-40 pinout, AD9238BCPZ-40 application, or AD9238BCPZ-40 equivalent, key selection criteria include guaranteed no missing codes over −40°C to +85°C, channel isolation >85 dB, clock duty cycle stabilizer support, flexible 1–2 Vp-p input range, and multiplexed output mode for space-constrained PCB layouts.
Technical Context
The AD9238BCPZ-40 implements a multistage differential pipelined architecture with output error correction logic to ensure 12-bit accuracy and monotonicity across industrial temperature range. Its dual SHA supports simultaneous sampling of two independent analog signals with exceptional crosstalk immunity.
It accepts dual single-ended clock inputs (CLK_A/CLK_B), includes a duty cycle stabilizer (DCS) to maintain performance under wide clock duty cycle variation, and offers configurable data format (offset binary or twos complement) plus out-of-range (OTR) flags per channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees monotonic transfer function and no missing codes over full temperature range. |
| Sample Rate | 40 MSPS - enables digitization of IF signals up to ~20 MHz without aliasing in undersampling applications. |
| SNR / SFDR | 70.4 dB / 80.5 dBc at 9.7 MHz - supports high-fidelity signal capture in WB-CDMA and WiMAX baseband processing. |
| Analog Input Bandwidth | 500 MHz - allows direct sampling of RF/IF signals with minimal external filtering. |
| Power Consumption | 330 mW total (165 mW/channel) at 40 MSPS - optimized for battery-powered instruments and portable medical devices. |
| Input Range | 1 Vp-p to 2 Vp-p differential - configurable via reference settings to match signal chain gain stages. |
| Channel Isolation | >85 dB at 10 MHz - ensures minimal inter-channel interference in time-interleaved or dual-path systems. |
Pinout & Package
The AD9238BCPZ-40 is housed in a Pb-free, 64-lead LFCSP (Lead Frame Chip Scale Package) with exposed thermal pad requiring connection to AGND. Package dimensions: 9 mm × 9 mm × 0.85 mm, pitch 0.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+_A / VIN−_A VIN+_B / VIN−_B |
Differential analog inputs (Ch A & Ch B) | Accepts 1–2 Vp-p differential signals; high 500 MHz bandwidth enables IF sampling without external amplification. |
| CLK_A / CLK_B | Independent channel clock inputs | Supports asynchronous or synchronized sampling; DCS circuit compensates for duty cycle distortion up to ±25%. |
| D0_A–D11_A / D0_B–D11_B | 12-bit parallel digital outputs (Ch A & Ch B) | Configurable offset binary/twos complement; OEB_A/OEB_B enable high-Z tri-state for shared bus interfacing. |
| PWDN_A / PWDN_B | Per-channel power-down control | Logic 1 powers down respective channel, reducing power to 2 mW standby while preserving configuration state. |
| MUX_SELECT | Data multiplexing control | Enables single-port output mode: interleaves Ch A/Ch B data on one 12-bit bus to reduce FPGA I/O count. |
| OTR_A / OTR_B | Out-of-range indicator flags | Asserts when input exceeds full-scale range; used with MSB to distinguish low/high overflow conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent ADC channels | Enables simultaneous sampling of two analog signals (e.g., I/Q paths or dual-sensor inputs) with matched gain/offset <±0.05% FSR. |
| Integrated voltage reference | 1.0 V internal reference (±35 mV error) eliminates need for external precision reference; SENSE pin selects 0.5 V or 1.0 V mode. |
| Clock duty cycle stabilizer (DCS) | Compensates for clock duty cycles from 30% to 70%, enabling use of low-cost crystal oscillators or PLLs without external duty cycle correction. |
| Flexible digital interface | Offset binary or twos complement output format selectable via DFS pin; OEB pins allow dynamic bus sharing without glue logic. |
| Low-power standby mode | 2.0 mW total standby power with both channels powered down-critical for handheld scopemeters with wake-on-event capability. |
Applications
| Ultrasound Beamforming | Direct-Conversion Receiver |
|---|---|
|
Use Scenario: Digitizing echo return signals from multiple transducer elements in real time. IC Role / Device Role / Timing Role: Dual-channel ADC captures I/Q baseband outputs from quadrature demodulators at 40 MSPS for digital beam synthesis. Use Value: 85 dB channel isolation prevents cross-talk between adjacent receive channels, preserving spatial resolution in B-mode imaging. |
Use Scenario: Sampling RF signals directly at zero-IF or low-IF in cellular infrastructure receivers. IC Role / Device Role / Timing Role: Simultaneous digitization of I and Q paths after quadrature downconversion, supporting WB-CDMA and CDMA2000 standards. Use Value: 500 MHz analog input bandwidth allows direct sampling of 20–30 MHz IF signals without image-reject filtering, simplifying front-end design. |
| Battery-Powered Scopemeter | Low-Cost Digital Oscilloscope |
|
Use Scenario: Portable field test equipment capturing transient waveforms with 20+ MHz bandwidth. IC Role / Device Role / Timing Role: Dual ADC serves as main acquisition engine-Ch A for trigger source, Ch B for signal capture-with 40 MSPS sustaining 10 MHz real-time bandwidth. Use Value: 330 mW total power enables >4 hours operation on Li-ion battery; standby mode extends idle time without losing calibration state. |
Use Scenario: Entry-level bench oscilloscopes requiring dual-channel 100+ kSa/s waveform capture. IC Role / Device Role / Timing Role: Provides 12-bit resolution at 40 MSPS with no missing codes, enabling accurate amplitude measurement and harmonic analysis. Use Value: Integrated reference and SHAs eliminate 6–8 external components per channel, reducing BOM cost and PCB area by ~35% vs discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, 12-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9238BCPZ-65 | Higher 65 MSPS sample rate; 600 mW power; identical pinout and feature set. | Required for >32.5 MHz IF sampling or higher Nyquist bandwidth applications. | Select AD9238BCPZ-65 only if system demands ≥50 MSPS sustained throughput; otherwise AD9238BCPZ-40 offers optimal power/performance trade-off. |
| AD9248BCPZ-40 | 14-bit resolution, same 40 MSPS rate, pin-compatible but higher 450 mW power and reduced SFDR (76.1 dBc). | Suitable where higher DC accuracy and ENOB (>12 bits) outweigh SNR/SFDR requirements. | Choose AD9248BCPZ-40 for applications prioritizing static linearity (INL/DNL) over dynamic performance-e.g., precision instrumentation over communications. |
Compared with AD9238BCPZ-65, the AD9238BCPZ-40 reduces power by 45% while maintaining identical noise floor and channel matching; versus AD9248BCPZ-40, it trades 2-bit resolution for 26% lower power and 4.4 dBc better SFDR-making it optimal for IF-sampling receivers where spurious-free dynamic range is critical.
Availability
AD9238BCPZ-40 is available at Aetrix Electronics and suitable for ultrasound beamforming, direct-conversion receivers, and battery-powered scopemeters requiring stable component supply and long-term industrial-grade availability.
Supply support for AD9238BCPZ-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 AD9238 product line delivers dual-channel, high-speed ADCs optimized for communications infrastructure, medical imaging, and portable test equipment-designed to replace discrete SHA + ADC + reference subsystems with single-chip integration.
FAQ
What is the maximum analog input frequency supported by the AD9238BCPZ-40?
The AD9238BCPZ-40 features a 500 MHz small-signal analog input bandwidth, enabling direct sampling of IF signals up to ~200 MHz in undersampling configurations. At 40 MSPS, its Nyquist frequency is 20 MHz; however, with proper anti-alias filtering and layout, it maintains usable SNR up to 100 MHz input per AC specifications in the datasheet.
Does the AD9238BCPZ-40 require an external voltage reference?
No. The AD9238BCPZ-40 integrates a precision 1.0 V voltage reference with ±35 mV output error over temperature. The SENSE pin allows selection between 1.0 V and 0.5 V reference modes. External reference is optional only if higher accuracy or custom scaling is required.
How does the clock duty cycle stabilizer (DCS) function in the AD9238BCPZ-40?
The DCS circuit in the AD9238BCPZ-40 actively corrects clock duty cycle distortion, maintaining ADC performance across input duty cycles from 30% to 70%. When enabled (DCS pin tied high), it eliminates need for external duty cycle correction circuits-reducing BOM count and jitter sensitivity in systems using low-cost oscillators or PLLs with poor duty cycle control.
Can the AD9238BCPZ-40 operate with a single 2.5 V supply?
No. The AD9238BCPZ-40 requires AVDD = 2.7–3.6 V (typical 3.0 V) for analog circuitry and DRVDD = 2.25–3.6 V (typical 2.5 V) for digital outputs. Supplying AVDD below 2.7 V violates absolute maximum ratings and risks missing codes, increased INL, or failure to meet AC specs. DRVDD may be 2.5 V, but AVDD must remain within its specified range.
What is the pipeline latency of the AD9238BCPZ-40, and how does it affect system synchronization?
The AD9238BCPZ-40 has a fixed pipeline latency of 7 clock cycles from sample edge to valid output data. This deterministic delay enables precise timing alignment in multi-ADC systems or FPGA-based digital downconverters-allowing predictable phase relationships between I/Q channels or synchronized triggering across sensor arrays without additional calibration.
AD9238BCPZ-40 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad, CSP
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 40M
- Number of Inputs:
- 2
- Input Type:
- Differential, Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.25V ~ 3.6V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 64-LFCSP-VQ (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD9238BCPZ-40 FAQ
1.How can I place an order for AD9238BCPZ-40 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9238BCPZ-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 AD9238BCPZ-40 reliable?
The price and inventory of AD9238BCPZ-40 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9238BCPZ-40 is usually 5 days.
3.What payment methods are accepted for AD9238BCPZ-40?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9238BCPZ-40 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9238BCPZ-40?
AD9238BCPZ-40 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9238BCPZ-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 AD9238BCPZ-40?
For technical support, including AD9238BCPZ-40 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9238BCPZ-40 requirements.
6.How does Aetrix verify that AD9238BCPZ-40 is sourced from the original manufacturer or authorized distributors?
All AD9238BCPZ-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 AD9238BCPZ-40 meets industry standards.
7.What is the process for return or replacement of AD9238BCPZ-40?
All AD9238BCPZ-40 units undergo pre-shipment inspection (PSI). If there is an issue with AD9238BCPZ-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 AD9238BCPZ-40 part is unused and in its original packaging.
Return procedure for AD9238BCPZ-40:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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