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Analog Devices Inc. AD9238BCPZRL-40
- Part No.:
- AD9238BCPZRL-40
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD9238BCPZRL-40.pdf
- Description:
- IC ADC 12BIT PIPELINED 64LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,585
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Product details
Overview
AD9238BCPZRL-40 from Analog Devices is a dual-channel, 12-bit, 40 MSPS analog-to-digital converter (ADC) fabricated in advanced CMOS, operating from a single 3 V supply (2.7 V–3.6 V). It features differential input with 500 MHz 3 dB bandwidth, 70.2 dB SNR at 9.7 MHz input, 84.0 dBc SFDR, and 85 dB crosstalk isolation. It serves as the front-end digitizer in ultrasound equipment and IF-sampling receivers.
For engineers reviewing the AD9238BCPZRL-40 datasheet, AD9238BCPZRL-40 pinout, AD9238BCPZRL-40 application, or AD9238BCPZRL-40 equivalent, this page delivers verified specifications, validated LFCSP-64 pin mapping, real-world performance data (SNR/SFDR vs. frequency and input level), and confirmed drop-in alternatives for dual ADC signal chain design.
Technical Context
The AD9238BCPZRL-40 implements 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 dual sample-and-hold amplifiers support flexible analog input ranges (1 Vp-p or 2 Vp-p) and enable high-fidelity sampling beyond Nyquist, including IF and direct RF sampling.
Dual independent clock inputs (CLK_A/CLK_B) control conversion cycles, and an integrated duty cycle stabilizer (DCS) maintains performance over wide clock duty cycle variation (30%–70%). Output data format is selectable via DFS pin between offset binary and twos complement, with multiplexed data output option enabled by MUX_SELECT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees monotonicity and no missing codes over full industrial temperature range. |
| Sample Rate | 40 MSPS - supports IF sampling up to ~20 MHz Nyquist zone with sufficient processing margin. |
| SNR | 70.2 dB (typ, fIN = 9.7 MHz) - enables >11.3 ENOB for high-fidelity baseband digitization. |
| SFDR | 84.0 dBc (typ, fIN = 9.7 MHz) - suppresses spurious content critical for multi-carrier wireless receivers. |
| Crosstalk | −85 dB - ensures channel independence in time-interleaved or dual-path architectures. |
| Input Bandwidth | 500 MHz (3 dB) - allows direct sampling of IF signals up to 200+ MHz without external amplification. |
| Power Consumption | 330 mW total (165 mW/channel) at 40 MSPS - balances performance and thermal budget in portable instruments. |
Pinout & Package
The AD9238BCPZRL-40 is housed 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 LQFP variant but offer lower inductance and improved thermal performance (θJA = 26.4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+_A / VIN−_A | Differential analog input, Channel A | Accepts 1 Vp-p or 2 Vp-p differential signal; 7 pF input capacitance requires careful driver matching. |
| VIN+_B / VIN−_B | Differential analog input, Channel B | Independent channel with >85 dB isolation; enables true simultaneous sampling for I/Q or dual-band systems. |
| CLK_A / CLK_B | Asynchronous conversion clocks | Support independent timing; DCS circuit corrects duty cycle errors to preserve aperture uncertainty (<0.5 ps rms). |
| D0_A–D11_A / D0_B–D11_B | Parallel digital outputs (12-bit per channel) | LVCMOS-compatible; DRVDD = 2.25–3.6 V; OEB_A/OEB_B control high-Z state for bus sharing. |
| PDWN_A / PDWN_B | Channel power-down control | Logic 1 disables respective channel (outputs static, not high-Z); reduces power by ~165 mW per channel. |
| MUX_SELECT | Data multiplexing mode select | High = disable multiplexing (dual-port operation); low = enable single-port time-multiplexed output (D0–D11 shared). |
| DFS | Data format select | Low = offset binary; high = twos complement - determines sign interpretation in DSP/FPGA firmware. |
| OTR_A / OTR_B | Out-of-range indicator | Active-high flag signaling overflow; used with MSB to distinguish low/high saturation in real-time monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 12-bit pipelined ADC cores | Guarantees no missing codes and <±0.5 LSB INL over −40°C to +85°C, enabling metrology-grade measurement stability. |
| Integrated voltage reference & SENSE pin | 1.0 V or 0.5 V internal reference selectable via SENSE; ±5 mV output error eliminates need for external precision reference in cost-sensitive designs. |
| Flexible analog input interface | Supports both differential and single-ended configurations via external resistor networks; 500 MHz bandwidth preserves transient fidelity in fast-edge applications. |
| Output datamux option | Reduces FPGA I/O count by 50% when only one processing path is active - ideal for handheld scopemeters with space-constrained PCBs. |
| Low-power standby mode | 2.0 mW consumption with clocks inactive - extends battery life in portable instrumentation without sacrificing wake-up latency (2.5 ms). |
Applications
| Ultrasound Beamforming | IF Sampling Receiver |
|---|---|
Use Scenario: Simultaneous digitization of 64+ transducer channel echoes at 40 MSPS for real-time beam synthesis and Doppler processing. IC Role / Device Role / Timing Role: Dual-channel ADC providing synchronized sampling with <0.5 ps aperture jitter and matched gain/offset (<±0.05% gain error) across channels. Use Value: Enables sub-millimeter spatial resolution and accurate velocity estimation without inter-channel calibration overhead. |
Use Scenario: Digitizing 70–100 MHz IF signals from quadrature downconverters in WB-CDMA base stations. IC Role / Device Role / Timing Role: High-SFDR front-end ADC rejecting adjacent channel interference while preserving EVM-critical signal integrity. Use Value: Achieves >84 dBc SFDR at 32.5 MHz input, meeting 3GPP ACLR requirements without additional analog filtering. |
| Battery-Powered Scopemeter | Low-Cost Digital Oscilloscope |
Use Scenario: Portable 2-channel 100 MHz bandwidth scope with 40 MSPS sampling and real-time FFT display on embedded ARM processor. IC Role / Device Role / Timing Role: Dual ADC delivering 12-bit resolution at 40 MSPS with 330 mW total power and integrated reference for compact, self-contained design. Use Value: Eliminates external reference and clock conditioning ICs, reducing BOM count by 3 parts and PCB area by >15 mm². |
Use Scenario: Entry-level bench oscilloscope requiring two independent 100 MHz analog front-ends with simultaneous sampling capability. IC Role / Device Role / Timing Role: Pin-compatible dual ADC replacing discrete single-channel solutions, simplifying layout and firmware synchronization. Use Value: Reduces design cycle time by reusing AD9238-40 evaluation board schematics and layout guidelines for LFCSP thermal management. |
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-65 | Higher sample rate (65 MSPS), higher power (600 mW), identical pinout and feature set. | Required for >32.5 MHz IF sampling or wider Nyquist bandwidth; not suitable where 40 MSPS suffices and thermal headroom is constrained. | Select AD9238BCPZRL-65 only if system demands >40 MSPS throughput; otherwise AD9238BCPZRL-40 offers optimal power/performance trade-off. |
| AD9248BCPZRL-40 | 14-bit resolution, same 40 MSPS rate, pin-compatible, higher SNR (74 dB), higher power (420 mW). | Used where dynamic range >80 dB is mandatory (e.g., high-end spectrum analyzers); overkill for 70 dB SNR ultrasound or CDMA receivers. | Choose AD9238BCPZRL-40 for cost-sensitive, power-constrained 12-bit applications; reserve AD9248BCPZRL-40 for 14-bit precision requirements. |
Compared with AD9238BCPZRL-65, the AD9238BCPZRL-40 reduces power by 45% while retaining identical interface, timing, and layout compatibility; versus AD9248BCPZRL-40, it trades 2 bits of resolution for 21% lower power and lower system cost-ideal for applications where 70 dB SNR meets specification.
Availability
AD9238BCPZRL-40 is available at Aetrix Electronics and suitable for ultrasound beamforming, IF sampling receivers, and battery-powered scopemeters requiring stable component supply and long-term industrial temperature support (−40°C to +85°C).
Supply support for AD9238BCPZRL-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 medical imaging, communications infrastructure, and portable test equipment-designed to replace discrete ADC + reference + clock conditioning solutions with single-chip integration.
FAQ
What is the maximum analog input frequency supported by the AD9238BCPZRL-40?
The AD9238BCPZRL-40 has a 500 MHz (3 dB) analog input bandwidth, enabling faithful digitization of signals up to ~200 MHz within the first Nyquist zone. At 40 MSPS, its usable input frequency range extends well beyond 20 MHz-critical for IF sampling in wireless receivers. Performance data (Figure 14) confirms SNR >69 dB and SFDR >80 dBc up to 100 MHz input, validating robust wideband operation. The AD9238BCPZRL-40 achieves this with differential SHA architecture and on-chip reference stability.
Does the AD9238BCPZRL-40 require an external voltage reference?
No, the AD9238BCPZRL-40 integrates a precision voltage reference with selectable 1.0 V or 0.5 V output (via SENSE pin), eliminating the need for external reference components. The internal reference exhibits ±5 mV output voltage error in 1 V mode and ±2.5 mV in 0.5 V mode, with load regulation of ≤0.8 mV at 1.0 mA. This integration reduces BOM count, PCB area, and calibration complexity-key advantages for space- and cost-constrained designs using the AD9238BCPZRL-40.
How does the duty cycle stabilizer (DCS) function in the AD9238BCPZRL-40?
The DCS circuit in the AD9238BCPZRL-40 actively corrects clock duty cycle deviations, maintaining high ADC performance even with asymmetric clocks (30%–70% duty cycle). When enabled (DCS pin tied high), it reduces sensitivity to clock source imperfections-preserving aperture uncertainty at <0.5 ps rms and sustaining SNR/SFDR within specification. This allows use of low-cost crystal oscillators or PLLs without external duty cycle correction, simplifying clock tree design for the AD9238BCPZRL-40.
Can the AD9238BCPZRL-40 operate with independent clock inputs for each channel?
Yes, the AD9238BCPZRL-40 accepts fully asynchronous clock signals on CLK_A and CLK_B pins, enabling independent sampling control per channel. This supports flexible timing schemes such as staggered sampling, channel-specific power-down sequencing, or separate clock domains in FPGA-based systems. However, for coherent dual-channel operation (e.g., I/Q demodulation), synchronous clocks are recommended-and the DCS circuit ensures jitter resilience in that configuration. The AD9238BCPZRL-40's functional block diagram explicitly shows dual clock inputs feeding independent SHA/ADC paths.
What package type is used for the AD9238BCPZRL-40, and how does it differ from the LQFP version?
The AD9238BCPZRL-40 uses a 64-lead LFCSP (Lead Frame Chip Scale Package) with an exposed thermal pad that must be soldered to AGND. Compared to the 64-lead LQFP variant, the LFCSP offers lower thermal resistance (θJA = 26.4°C/W vs. 54°C/W), reduced lead inductance, and smaller footprint-improving high-frequency signal integrity and thermal management in dense layouts. Both packages share identical pin numbering and functionality, making them drop-in compatible at the board level for the AD9238BCPZRL-40.
AD9238BCPZRL-40 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):
- 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:
- -
AD9238BCPZRL-40 FAQ
1.How can I place an order for AD9238BCPZRL-40 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9238BCPZRL-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 AD9238BCPZRL-40 reliable?
The price and inventory of AD9238BCPZRL-40 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9238BCPZRL-40 is usually 5 days.
3.What payment methods are accepted for AD9238BCPZRL-40?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9238BCPZRL-40 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9238BCPZRL-40?
AD9238BCPZRL-40 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9238BCPZRL-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 AD9238BCPZRL-40?
For technical support, including AD9238BCPZRL-40 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9238BCPZRL-40 requirements.
6.How does Aetrix verify that AD9238BCPZRL-40 is sourced from the original manufacturer or authorized distributors?
All AD9238BCPZRL-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 AD9238BCPZRL-40 meets industry standards.
7.What is the process for return or replacement of AD9238BCPZRL-40?
All AD9238BCPZRL-40 units undergo pre-shipment inspection (PSI). If there is an issue with AD9238BCPZRL-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 AD9238BCPZRL-40 part is unused and in its original packaging.
Return procedure for AD9238BCPZRL-40:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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