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Analog Devices Inc. AD9238BCPZRL-65
- Part No.:
- AD9238BCPZRL-65
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD9238BCPZRL-65.pdf
- Description:
- IC ADC 12BIT PIPELINED 64LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,779
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Product details
Overview
AD9238BCPZRL-65 from Analog Devices is a dual-channel, 12-bit, 65 MSPS analog-to-digital converter (ADC) with differential input architecture, integrated voltage reference, and clock duty cycle stabilizer. It delivers 70 dB SNR and 80.5 dBc SFDR at 32.5 MHz input, operates from a single 3 V supply (2.7–3.6 V), and consumes 600 mW total power. It is used in ultrasound front-ends and IF-sampling receivers requiring high channel isolation and wide analog bandwidth.
For engineers reviewing the AD9238BCPZRL-65 datasheet, AD9238BCPZRL-65 pinout, AD9238BCPZRL-65 application, or AD9238BCPZRL-65 equivalent, key selection criteria include dual-channel crosstalk immunity (>85 dB), 500 MHz analog input bandwidth, flexible 1–2 Vp-p input range, output data multiplexing capability, and LFCSP-64 package compatibility with industrial temperature operation (−40°C to +85°C).
Technical Context
The AD9238BCPZRL-65 implements a multistage differential pipelined ADC architecture with output error correction logic to guarantee 12-bit accuracy and no missing codes across temperature. Its dual sample-and-hold amplifiers support simultaneous sampling of two independent analog channels with exceptional inter-channel isolation.
It features a dedicated clock duty cycle stabilizer (DCS) that maintains performance over wide input clock duty cycle variation, and supports both offset binary and twos complement output formats via the DFS pin. The device uses separate analog (AVDD) and digital (DRVDD) supplies for noise separation and includes programmable power-down per channel (PWDN_A/PWDN_B).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees monotonicity and no missing codes over full industrial temperature range. |
| Sample Rate | 65 MSPS - maximum conversion rate enabling Nyquist-limited digitization up to 32.5 MHz. |
| SNR | 70 dB (to Nyquist, fIN = 32.5 MHz) - defines minimum detectable signal level above quantization and thermal noise floor. |
| SFDR | 80.5 dBc (to Nyquist, fIN = 32.5 MHz) - determines spurious-free dynamic range for multi-tone or modulated signal capture. |
| Crosstalk | >85 dB - ensures minimal coupling between Channel A and Channel B during simultaneous sampling. |
| Analog BW | 500 MHz (3 dB) - supports direct sampling of IF signals up to ~200 MHz without external amplification. |
| Power | 600 mW total (300 mW/channel) at 65 MSPS - enables thermally constrained embedded systems and portable instrumentation. |
| Supply | Single 3 V (2.7–3.6 V AVDD); DRVDD = 2.25–3.6 V - simplifies power design with one main rail and isolated digital driver supply. |
Pinout & Package
The AD9238BCPZRL-65 is packaged in a Pb-free, 64-lead LFCSP (Lead Frame Chip Scale Package) with exposed thermal pad requiring connection to AGND. Pin count and layout match the 64-lead LQFP variant but offer lower thermal resistance (θJA = 26.4°C/W with heat slug soldered).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+_A / VIN−_A | Differential analog input for Channel A | Accepts 1–2 Vp-p differential signal; 7 pF input capacitance requires careful layout and matching. |
| VIN+_B / VIN−_B | Differential analog input for Channel B | Independent input path; >85 dB crosstalk ensures minimal interference from Channel A activity. |
| CLK_A / CLK_B | Asynchronous dual clock inputs | Enable independent timing control per channel; DCS circuit corrects duty cycle distortion on either clock. |
| D0_A–D11_A / D0_B–D11_B | 12-bit parallel CMOS digital outputs | Output format selectable (offset binary/twos complement); OEB_A/OEB_B enable high-Z tri-state for bus sharing. |
| PWDN_A / PWDN_B | Per-channel power-down control | Logic 1 disables respective ADC core and analog front-end, reducing power to 2 mW standby mode. |
| MUX_SELECT | Data multiplexing mode control | Enables single-port output by time-division multiplexing Channel A and B data onto one 12-bit bus. |
| SHARED_REF | Reference configuration select | High = shared reference mode (REFT_A/REFB_A drive both channels); Low = independent reference per channel. |
| OTR_A / OTR_B | Out-of-range indicator flags | Asserted when input exceeds ±FS/2; used with MSB to distinguish low/high overflow conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 12-bit pipelined ADC cores | Guarantees no missing codes and 12-bit linearity (±0.35 LSB DNL typ) across −40°C to +85°C. |
| Integrated 1.0 V reference with SENSE pin | Eliminates need for external reference; SENSE selects 1 V or 0.5 V internal reference mode for input scaling. |
| 500 MHz analog input bandwidth | Supports undersampled IF digitization (e.g., 70 MHz, 120 MHz) without external gain stages or filters. |
| Programmable output data format | DFS pin selects offset binary (default) or twos complement - simplifies FPGA/DSP interface logic design. |
| Channel-specific power-down and output enable | Allows dynamic channel gating and bus arbitration in time-multiplexed systems without external logic. |
| On-chip duty cycle stabilizer (DCS) | Compensates for clock duty cycle deviations outside 40–60%, preserving AC performance without external PLL. |
Applications
| Ultrasound Beamforming | IF Sampling Receiver |
|---|---|
|
Use Scenario: Digitizing echo return signals from phased-array transducers at 20–50 MHz center frequencies using time-delay beamforming. IC Role / Device Role / Timing Role: Dual-channel synchronous sampling ADC capturing I/Q or time-aligned channel pairs with >85 dB isolation to suppress cross-talk artifacts. Use Value: Enables real-time digital beamforming with 12-bit precision and 65 MSPS aggregate throughput while maintaining low system power (600 mW). |
Use Scenario: Direct digitization of 70 MHz or 120 MHz IF signals in cellular base station receivers (WB-CDMA, LTE). IC Role / Device Role / Timing Role: High-SFDR ADC performing undersampling with 80.5 dBc spurious-free range to preserve adjacent channel rejection. Use Value: Replaces mixer+filter+ADC chains with single-chip solution, reducing board area and analog component count. |
| Battery-Powered Scopemeter | Digital Oscilloscope Front-End |
|
Use Scenario: Portable handheld instrument acquiring transient waveforms with 32.5 MHz effective bandwidth and battery life optimization. IC Role / Device Role / Timing Role: Dual ADC supporting interleaved or independent channel acquisition; PWDN pins reduce idle power to 2 mW per channel. Use Value: Delivers oscilloscope-grade ENOB (11.4 bits) at 32.5 MHz while meeting portable thermal and energy constraints. |
Use Scenario: Low-cost benchtop oscilloscope requiring simultaneous dual-channel capture at ≥50 MS/s with calibrated amplitude accuracy. IC Role / Device Role / Timing Role: Precision ADC with guaranteed INL (±0.55 LSB max) and offset/gain matching (±0.1% FSR) for channel-to-channel consistency. Use Value: Eliminates post-acquisition software calibration for basic measurements, lowering firmware complexity and cost. |
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 |
|---|---|---|---|
| AD9238BCPZRL-40 | Lower max sample rate (40 MSPS), reduced power (330 mW), identical pinout and feature set. | Suitable for IF sampling ≤20 MHz or lower-power portable instruments where 65 MSPS is unnecessary. | Select when system clock budget or thermal envelope restricts maximum throughput; retains full software/hardware compatibility. |
| AD9248BCPZRL-65 | 14-bit resolution, same 65 MSPS rate, pin-compatible but higher power (750 mW) and larger INL (±1.25 LSB). | Preferred for applications requiring higher dynamic range (e.g., radar pulse analysis, high-fidelity spectrum monitoring). | Choose when ENOB >11.4 bits is mandatory; verify thermal management due to +150 mW dissipation increase. |
Compared with AD9238BCPZRL-40 and AD9248BCPZRL-65, the AD9238BCPZRL-65 uniquely balances 12-bit fidelity, 65 MSPS speed, and 600 mW power in a compact LFCSP-making it optimal for cost-sensitive, thermally constrained dual-channel digitizers where 14-bit resolution is not required.
Availability
AD9238BCPZRL-65 is available at Aetrix Electronics and suitable for ultrasound equipment, IF sampling receivers, and battery-powered scopemeters requiring stable component supply and long-term industrial temperature support.
Supply support for AD9238BCPZRL-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 AD9238 belongs to Analog Devices' high-speed data converter product line, designed specifically for communications infrastructure, medical imaging, and test equipment demanding dual-channel synchronization, low crosstalk, and robust IF sampling capability.
FAQ
What is the maximum analog input frequency supported by the AD9238BCPZRL-65?
The AD9238BCPZRL-65 has a 500 MHz (3 dB) analog input bandwidth, enabling direct sampling of RF/IF signals up to ~200 MHz under undersampling conditions. At its 65 MSPS sample rate, the first Nyquist zone extends to 32.5 MHz; however, the wide analog bandwidth allows alias-free capture of higher-frequency signals folded into baseband, provided anti-alias filtering is applied externally.
Does the AD9238BCPZRL-65 require external reference components?
No, the AD9238BCPZRL-65 integrates a precision 1.0 V (or 0.5 V) voltage reference and does not require external reference components. The SENSE pin configures reference mode, and REFT/REFB pins provide differential reference connections. External reference is optional only if higher accuracy or temperature stability than the internal reference is needed.
How does the clock duty cycle stabilizer (DCS) function in the AD9238BCPZRL-65?
The DCS circuit in the AD9238BCPZRL-65 actively corrects input clock duty cycle deviations, maintaining optimal ADC performance even when CLK_A or CLK_B duty cycle falls outside the 40–60% range. When enabled (DCS pin tied high), it eliminates the need for external clock conditioning circuits and preserves SNR/SFDR across varying clock sources.
Can the AD9238BCPZRL-65 operate with only one channel active?
Yes, the AD9238BCPZRL-65 supports independent channel operation. PWDN_A and PWDN_B pins allow disabling either ADC core individually, reducing total power to ~302 mW (one channel active at 65 MSPS). Output enable pins (OEB_A/OEB_B) further isolate digital buses, enabling flexible system-level power and interface management.
What package type is used for the AD9238BCPZRL-65 and what are its thermal characteristics?
The AD9238BCPZRL-65 uses a 64-lead LFCSP package with an exposed thermal pad that must be soldered to AGND. Its thermal resistance is θJA = 26.4°C/W (with heat slug connected to ground plane on a 4-layer board), significantly lower than the LQFP variant (θJA = 54°C/W), enabling reliable operation at full 600 mW dissipation in industrial environments.
AD9238BCPZRL-65 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 65M
- 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:
- -
AD9238BCPZRL-65 FAQ
1.How can I place an order for AD9238BCPZRL-65 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9238BCPZRL-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 AD9238BCPZRL-65 reliable?
The price and inventory of AD9238BCPZRL-65 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9238BCPZRL-65 is usually 5 days.
3.What payment methods are accepted for AD9238BCPZRL-65?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9238BCPZRL-65 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9238BCPZRL-65?
AD9238BCPZRL-65 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9238BCPZRL-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 AD9238BCPZRL-65?
For technical support, including AD9238BCPZRL-65 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9238BCPZRL-65 requirements.
6.How does Aetrix verify that AD9238BCPZRL-65 is sourced from the original manufacturer or authorized distributors?
All AD9238BCPZRL-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 AD9238BCPZRL-65 meets industry standards.
7.What is the process for return or replacement of AD9238BCPZRL-65?
All AD9238BCPZRL-65 units undergo pre-shipment inspection (PSI). If there is an issue with AD9238BCPZRL-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 AD9238BCPZRL-65 part is unused and in its original packaging.
Return procedure for AD9238BCPZRL-65:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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