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Analog Devices Inc. AD9238BSTZRL-40
- Part No.:
- AD9238BSTZRL-40
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-LQFP
- Datasheet:
-
AD9238BSTZRL-40.pdf
- Description:
- IC ADC 12BIT PIPELINED 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,249
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Product details
Overview
AD9238BSTZRL-40 from Analog Devices is a dual-channel, 12-bit, 40 MSPS analog-to-digital converter (ADC) fabricated in advanced CMOS, featuring integrated sample-and-hold amplifiers, on-chip voltage reference, and differential input with 500 MHz bandwidth. It operates from a single 3 V supply (2.7–3.6 V), delivers 70.4 dB SNR and 80.5 dBc SFDR at 9.7 MHz input, and supports offset binary or twos complement output formats for ultrasound and IF-sampling receiver applications.
For engineers reviewing the AD9238BSTZRL-40 datasheet, AD9238BSTZRL-40 pinout, AD9238BSTZRL-40 application, or AD9238BSTZRL-40 equivalent, this page provides verified technical context, validated pin functions, confirmed AC/DC specifications at 40 MSPS, package mapping to 64-lead LQFP, and two industry-validated alternative parts with documented functional and application differences.
Technical Context
The AD9238BSTZRL-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 SHA enables flexible differential or single-ended analog inputs with user-selectable 1 Vp-p or 2 Vp-p full-scale ranges and ±0.5% gain matching between channels.
It integrates a clock duty cycle stabilizer (DCS) that maintains performance over wide duty cycle variation, supports independent or shared reference modes via SHARED_REF, and offers data multiplexing (MUX_SELECT) and per-channel power-down (PWDN_A/B) for system-level power management in time-interleaved or burst-mode acquisition systems.
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 - defines maximum sustained conversion throughput; supports Nyquist sampling up to 20 MHz baseband or IF signals. |
| SNR | 70.4 dB (typ, fIN = 2.4 MHz) - determines dynamic range for low-noise signal capture in medical imaging front-ends. |
| SFDR | 80.5 dBc (typ, fIN = 32.5 MHz) - specifies spurious-free resolution critical for multi-carrier wireless receivers. |
| Power Consumption | 330 mW (DC input, 40 MSPS) - enables thermal-aware PCB layout in space-constrained battery-powered instruments. |
| Analog Input Bandwidth | 500 MHz (3 dB) - supports direct sampling of IF signals up to ~200 MHz without external amplification. |
| Crosstalk | −85 dB - ensures channel isolation for simultaneous dual-channel acquisition in ultrasound beamforming. |
Pinout & Package
AD9238BSTZRL-40 is packaged in a Pb-free, 64-lead LQFP (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad requiring connection to AGND. Pin 1 identifier is marked; all DNC pins must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+_A / VIN−_A | Differential analog input for Channel A | Accepts 1 Vp-p or 2 Vp-p differential signal; high common-mode rejection enables noise-immune sensor interfacing. |
| CLK_A / CLK_B | Independent clock inputs for each ADC channel | Supports asynchronous sampling or time-interleaved operation; DCS circuit corrects duty cycle distortion. |
| D0_A–D11_A / D0_B–D11_B | 12-bit parallel digital outputs (LSB to MSB) | Configurable as offset binary or twos complement; OEB_A/B controls high-Z state for bus sharing. |
| PWDN_A / PWDN_B | Per-channel power-down control | Logic 1 disables respective channel (outputs static, not high-Z); enables dynamic power scaling in multi-mode systems. |
| OTR_A / OTR_B | Out-of-range flag per channel | Indicates overflow/underflow condition; used with MSB to distinguish high vs. low saturation in real-time processing. |
| SHARED_REF | Reference mode selection | Low = independent reference per channel; high = shared reference for improved inter-channel gain matching. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 12-bit ADC with pipelined architecture | Guarantees no missing codes and 11.4 ENOB at 9.7 MHz input-enables high-fidelity digitization in diagnostic ultrasound. |
| Integrated voltage reference and SENSE pin | Provides stable 1.0 V or 0.5 V internal reference; SENSE selects mode-eliminates need for external precision reference ICs. |
| Clock duty cycle stabilizer (DCS) | Compensates for clock duty cycles from 30% to 70%-allows use of low-cost crystal oscillators or FPGA clocks without external conditioning. |
| Multiplexed data output (MUX_SELECT) | Routes either Channel A or B data to a single 12-bit bus-reduces FPGA I/O count and PCB routing complexity in compact designs. |
| Flexible digital output format | DFS pin selects offset binary (default) or twos complement-simplifies interface to DSPs or FPGAs requiring signed arithmetic. |
Applications
| Ultrasound Beamforming | IF Sampling Receiver |
|---|---|
|
Use Scenario: Simultaneous digitization of echo signals from multiple transducer elements in portable ultrasound systems. IC Role / Device Role / Timing Role: Dual-channel ADC captures time-aligned RF echoes with <1 ps aperture jitter and >85 dB crosstalk suppression. Use Value: Enables real-time beam synthesis with sub-millimeter spatial resolution using 40 MSPS sampling of 15–20 MHz center-frequency signals. |
Use Scenario: Direct digitization of 70–100 MHz IF signals in CDMA2000/WiMAX baseband receivers. IC Role / Device Role / Timing Role: High-SFDR ADC resolves adjacent channel interference while maintaining 70+ dB SNR across wide IF bandwidth. Use Value: Eliminates analog IF filtering stages and supports software-defined radio architectures with 80.5 dBc SFDR at 32.5 MHz input. |
| Battery-Powered Scopemeter | Low-Cost Digital Oscilloscope |
|
Use Scenario: Hand-held scopemeters acquiring transient waveforms with 20–40 MSPS real-time sampling and deep memory buffering. IC Role / Device Role / Timing Role: Low-power dual ADC (330 mW @ 40 MSPS) extends battery life while delivering 12-bit vertical resolution. Use Value: Achieves 10 ns effective sampling interval and 500 MHz analog bandwidth-supports accurate rise-time measurement of fast digital edges. |
Use Scenario: Entry-level benchtop oscilloscopes requiring dual-channel synchronous acquisition at ≤40 MSPS with minimal BOM cost. IC Role / Device Role / Timing Role: Pin-compatible upgrade path from AD9248-40; shares layout and firmware infrastructure across product tiers. Use Value: Reduces design risk via proven LQFP footprint and eliminates need for external clock conditioning or reference buffers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9238BSTZ-40 | Same silicon, non-tape-and-reel packaging (tray vs. reel); identical electrical specs and pinout. | No difference in circuit function or layout; differs only in logistics handling and minimum order quantity. | Select AD9238BSTZRL-40 for automated SMT assembly; AD9238BSTZ-40 for prototyping or low-volume manual placement. |
| AD9248BSTZRL-40 | 14-bit resolution, same 40 MSPS rate, identical 64-lead LQFP package and pinout-but higher power (420 mW) and lower SNR (69.5 dB). | Preferred where higher resolution outweighs SNR/power trade-offs, e.g., precision instrumentation with low-frequency inputs. | Choose AD9238BSTZRL-40 when SNR >70 dB and power <330 mW are mandatory; AD9248BSTZRL-40 when 14-bit linearity is prioritized over dynamic range. |
Compared with AD9238BSTZRL-40, AD9238BSTZ-40 offers identical performance in tray packaging for NPI validation, while AD9248BSTZRL-40 trades 2 extra bits of resolution for 90 mW higher power and 0.5 dB lower SNR-making AD9238BSTZRL-40 optimal for battery-powered, high-dynamic-range applications like portable ultrasound.
Availability
AD9238BSTZRL-40 is available at Aetrix Electronics and suitable for ultrasound equipment, IF sampling receivers, and battery-powered scopemeters requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.
Supply support for AD9238BSTZRL-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, with R&D and manufacturing facilities worldwide.
The AD9238 product line delivers dual-channel, low-power, high-SFDR ADCs optimized for medical imaging, communications infrastructure, and portable test equipment where channel matching, thermal stability, and wide analog bandwidth are critical.
FAQ
What is the maximum analog input frequency supported by AD9238BSTZRL-40?
The AD9238BSTZRL-40 features a 500 MHz (3 dB) analog input bandwidth, enabling direct sampling of IF signals up to approximately 200 MHz. At 40 MSPS, its Nyquist frequency is 20 MHz, but the wide SHA bandwidth supports undersampling applications-verified in datasheet Figure 14 showing usable SNR out to 120 MHz with degradation beyond 100 MHz.
Does AD9238BSTZRL-40 require external reference components?
No. AD9238BSTZRL-40 integrates a precision voltage reference with 1.0 V or 0.5 V output selectable via the SENSE pin. The internal reference has ±35 mV output voltage error and 0.8 mV load regulation at 1.0 mA-sufficient for most applications without external trimming or buffering.
How does the clock duty cycle stabilizer (DCS) function in AD9238BSTZRL-40?
The DCS circuit in AD9238BSTZRL-40 actively corrects clock duty cycle deviations from 30% to 70%, maintaining SNR and SFDR performance without external duty cycle correction ICs. When DCS is enabled (DCS pin tied high), it stabilizes internal sampling timing-critical for preserving 70.4 dB SNR with low-cost oscillator sources.
Can AD9238BSTZRL-40 operate with separate power supplies for analog and digital sections?
Yes. AD9238BSTZRL-40 uses AVDD (2.7–3.6 V) for analog circuitry and DRVDD (2.25–3.6 V) for digital outputs, with separate AGND and DRGND planes. This separation minimizes digital switching noise coupling into sensitive analog paths-confirmed by >85 dB crosstalk and 70+ dB SNR performance in mixed-signal layouts.
What is the pipeline latency of AD9238BSTZRL-40 at 40 MSPS?
The AD9238BSTZRL-40 exhibits a fixed pipeline delay of 7 clock cycles at all sample rates, including 40 MSPS. This deterministic latency simplifies timing alignment in FPGA-based digital downconverters and enables precise synchronization between dual channels for coherent signal processing.
AD9238BSTZRL-40 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-LQFP
- 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-LQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD9238BSTZRL-40 FAQ
1.How can I place an order for AD9238BSTZRL-40 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9238BSTZRL-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 AD9238BSTZRL-40 reliable?
The price and inventory of AD9238BSTZRL-40 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9238BSTZRL-40 is usually 5 days.
3.What payment methods are accepted for AD9238BSTZRL-40?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9238BSTZRL-40 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9238BSTZRL-40?
AD9238BSTZRL-40 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9238BSTZRL-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 AD9238BSTZRL-40?
For technical support, including AD9238BSTZRL-40 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9238BSTZRL-40 requirements.
6.How does Aetrix verify that AD9238BSTZRL-40 is sourced from the original manufacturer or authorized distributors?
All AD9238BSTZRL-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 AD9238BSTZRL-40 meets industry standards.
7.What is the process for return or replacement of AD9238BSTZRL-40?
All AD9238BSTZRL-40 units undergo pre-shipment inspection (PSI). If there is an issue with AD9238BSTZRL-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 AD9238BSTZRL-40 part is unused and in its original packaging.
Return procedure for AD9238BSTZRL-40:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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