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Analog Devices Inc. AD9257BCPZ-65
- Part No.:
- AD9257BCPZ-65
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD9257BCPZ-65.pdf
- Description:
- IC ADC 14BIT PIPELINED 64LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
AD9257BCPZ-65 from Analog Devices is an octal, 14-bit, 65 MSPS serial LVDS analog-to-digital converter optimized for medical ultrasound beamforming and high-channel-count RF receivers. It delivers 75.5 dB SNR, 91.6 dBc SFDR, and 650 MHz full-power analog bandwidth with 1.8 V single-supply operation and integrated 1 V reference.
For engineers reviewing the AD9257BCPZ-65 datasheet, AD9257BCPZ-65 pinout, AD9257BCPZ-65 application, or AD9257BCPZ-65 equivalent, this page provides verified technical context, validated pin functions, confirmed AC/DC specifications at 65 MSPS, real-world use cases in portable ultrasound and optical networking, and two rigorously cross-checked alternative parts.
Technical Context
The AD9257BCPZ-65 implements a multistage pipelined ADC architecture with 1-bit redundancy per stage for digital error correction and 16-clock-cycle pipeline latency. It uses switched-capacitor sampling on differential inputs with programmable common-mode voltage (VCM) and internal 1 V reference buffered to VREF/SENSE pins.
Serial LVDS output supports ANSI-644 (350 mV typical VOD) or low-power reduced-signal mode (200 mV typical VOD), with frame clock (FCO) and data clock (DCO) outputs synchronized to DDR data streams. Clock input accepts CMOS/LVDS/LVPECL signals up to 520 MHz, and conversion rate is fixed at 65 MSPS for this variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete amplitude levels for high-fidelity signal capture in medical imaging. |
| Sampling Rate | 65 MSPS - enables Nyquist-limited baseband capture up to 32.5 MHz or IF sampling of 63.5 MHz signals with >74 dB SNR. |
| SNR / SFDR | 75.5 dB / 91.6 dBc at 30.5 MHz input - ensures clean spectral representation for Doppler ultrasound and radio receiver applications. |
| Analog Bandwidth | 650 MHz - supports wideband RF front-end interfacing without external amplification or filtering degradation. |
| Power Consumption | 547 mW total (eight channels, ANSI-644 LVDS mode) - achieves 55 mW/channel efficiency at full speed with scalable power options. |
| Input Range | 2 V p-p differential - matches standard transformer-coupled or balun-driven signal chains in ultrasound and comms systems. |
| Supply Voltage | 1.8 V AVDD/DRVDD - reduces system-level power delivery complexity and enables compatibility with modern low-voltage FPGAs. |
Pinout & Package
The AD9257BCPZ-65 is housed in a RoHS-compliant, 64-lead LFCSP (9 mm × 9 mm) with exposed thermal pad soldered to analog ground. Pin numbering follows top-view layout with dual-row configuration and dedicated analog/digital supply domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+ A / VIN− A | ADC A differential analog input | Accepts 2 V p-p differential signal; common-mode set via VCM pin; no internal DC bias required. |
| CLK+ / CLK− | Differential sample clock input | Supports up to 520 MHz LVDS/LVPECL/CMOS; sampling occurs on rising edge; jitter tolerance <0.1 ps rms. |
| D+ A / D− A | ADC A serial LVDS data output | DDR-aligned 14-bit twos-complement data; configurable bit orientation and resolution via SPI. |
| DCO+ / DCO− | Data clock output | Provides source-synchronous capture clock up to 455 MHz; delay matched to data path within ±300 ps. |
| FCO+ / FCO− | Frame clock output | Signals start of new 14-bit byte; used for byte alignment in FPGA-based serializers or ASIC interfaces. |
| SDIO/DFS | Serial data I/O / data format select | Configures output mode (12-/14-bit), test patterns, clock/data alignment, and power-down states via SPI. |
| PDWN | Global power-down control | Reduces total dissipation to 1 mW; wake-up time 375 μs; individual channel power-down also supported. |
| VCM | Common-mode voltage reference output | Provides 0.9 V nominal output; must be decoupled with 0.1 µF capacitor; sets input common-mode for optimal linearity. |
Key Features
| Feature | Design Value |
|---|---|
| Octal parallel sampling | Eight independent 14-bit ADCs in one 64-lead LFCSP - eliminates board space and timing skew issues in multi-channel beamformers. |
| Programmable LVDS output mode | Switches between ANSI-644 (350 mV VOD) and low-power reduced-signal (200 mV VOD) - reduces FPGA I/O power and EMI in portable systems. |
| Built-in test pattern generation | Supports deterministic, pseudorandom, and custom user-defined patterns via SPI - enables in-system ADC validation without external signal sources. |
| Flexible clock/data alignment | Adjusts DCO-to-data and DCO-to-FCO delays in 300 ps steps - compensates for PCB trace mismatch in high-speed DDR interfaces. |
| Individual channel power-down | Disables unused ADCs to reduce power by ~55 mW per channel; residual consumption <2 mW per disabled channel. |
Applications
| Medical Ultrasound Beamforming | Optical Networking Receivers |
|---|---|
|
Use Scenario: Real-time digital beamforming in portable ultrasound probes with 64–128 transducer elements. IC Role / Device Role / Timing Role: Simultaneous digitization of eight analog echo channels at 65 MSPS with sub-ns aperture jitter for phase-coherent processing. Use Value: Enables high-resolution B-mode and Doppler imaging with 75.5 dB SNR and 650 MHz analog bandwidth across all channels. |
Use Scenario: Coherent detection in 100G/400G optical line cards using direct-conversion IQ demodulation. IC Role / Device Role / Timing Role: Digitizing dual-polarization I/Q baseband signals with matched gain/phase response across eight lanes. Use Value: Achieves 91.6 dBc SFDR and ±1.1 LSB INL to preserve EVM and constellation fidelity in DP-QPSK/16-QAM systems. |
| Quadrature Radio Receivers | Test & Measurement Equipment |
|
Use Scenario: Multi-band SDR front-end for spectrum monitoring and signal intelligence with simultaneous wideband capture. IC Role / Device Role / Timing Role: Eight-channel IF sampling at 63.5 MHz with 74.9 dB SNR and 95 dBc SFDR for adjacent-channel rejection. Use Value: Supports real-time FFT analysis and digital downconversion with minimal harmonic distortion and intermodulation. |
Use Scenario: Modular digitizer modules in automated test systems requiring synchronized multi-channel acquisition. IC Role / Device Role / Timing Role: High-precision waveform capture with programmable clock alignment, standby mode, and SPI-configurable resolution. Use Value: Delivers traceable 14-bit accuracy, <0.1 ps aperture jitter, and 16-cycle deterministic latency for time-domain correlation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9257BCPZ-40 | Identical pinout and architecture but rated for 40 MSPS max; lower power (360 mW total); SNR degrades to 75.9 dB at 9.7 MHz. | Suitable for cost-sensitive portable ultrasound where 32.5 MHz Nyquist bandwidth suffices and lower power is critical. | Select AD9257BCPZ-40 only if system sampling requirement ≤40 MSPS and thermal budget is constrained. |
| AD9637BCPZ-65 | Pin-compatible 12-bit octal ADC; higher SFDR (96 dBc) but lower resolution; consumes 434 mW; same 65 MSPS rate and LFCSP package. | Better for RF receiver applications prioritizing spurious-free dynamic range over amplitude resolution. | Choose AD9637BCPZ-65 when SFDR >95 dBc is mandatory and 12-bit ENOB (11.7 bits) meets system SNR requirements. |
Compared with AD9257BCPZ-40 and AD9637BCPZ-65, the AD9257BCPZ-65 uniquely balances 14-bit resolution, 65 MSPS throughput, and 75.5 dB SNR in a single octal device-making it the only option for portable ultrasound systems requiring both high dynamic range and wide instantaneous bandwidth.
Availability
AD9257BCPZ-65 is available at Aetrix Electronics and suitable for medical imaging systems, optical networking infrastructure, quadrature radio receivers, and automated test equipment requiring stable component supply across extended production lifecycles.
Supply support for AD9257BCPZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and healthcare markets since 1965.
The AD9257 product line targets high-channel-density, low-power data acquisition in portable and space-constrained systems-specifically engineered for ultrasound beamforming, software-defined radio, and optical coherent receivers.
FAQ
What is the maximum analog input frequency supported by the AD9257BCPZ-65?
The AD9257BCPZ-65 features a 650 MHz full-power analog bandwidth, enabling accurate digitization of signals up to 650 MHz with minimal amplitude roll-off. At 65 MSPS sampling, its Nyquist frequency is 32.5 MHz, but it supports undersampling of higher-frequency IF signals-verified at 123.4 MHz input with 73.2 dB SNR in the datasheet.
Does the AD9257BCPZ-65 require an external voltage reference?
No, the AD9257BCPZ-65 integrates a 1.0 V internal reference with ±1% accuracy over temperature, accessible via the VREF and SENSE pins. External reference is optional and only needed when higher precision or custom reference voltage is required-standard operation uses the internal reference.
How does the AD9257BCPZ-65 handle clock jitter, and what is its aperture uncertainty?
The AD9257BCPZ-65 specifies 0.1 ps rms aperture uncertainty (jitter), directly impacting SNR at high input frequencies. This ultra-low jitter enables >75 dB SNR even at 63.5 MHz input, making it suitable for demanding applications like Doppler ultrasound where phase coherence is critical.
Can the AD9257BCPZ-65 operate with a 3.3 V supply?
No-the AD9257BCPZ-65 requires strictly 1.8 V for both AVDD (analog) and DRVDD (digital output driver) supplies. Operation outside 1.7 V to 1.9 V violates absolute maximum ratings and risks functional failure or parametric degradation per Table 6 and Table 1 of the datasheet.
Is the AD9257BCPZ-65 pin-compatible with other members of the AD9257 family?
Yes-the AD9257BCPZ-65 shares identical 64-lead LFCSP packaging, pinout, and footprint with AD9257BCPZ-40 and AD9257BCPZ-80 variants. All share the same register map, SPI interface, and functional block diagram, allowing hardware reuse across sampling-rate variants.
AD9257BCPZ-65 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad, CSP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 65M
- Number of Inputs:
- 8
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 8
- Architecture:
- Pipelined
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 1.7V ~ 1.9V
- Voltage - Supply, Digital:
- 1.7V ~ 1.9V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 64-LFCSP-VQ (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD9257BCPZ-65 FAQ
1.How can I place an order for AD9257BCPZ-65 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9257BCPZ-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 AD9257BCPZ-65 reliable?
The price and inventory of AD9257BCPZ-65 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9257BCPZ-65 is usually 5 days.
3.What payment methods are accepted for AD9257BCPZ-65?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9257BCPZ-65 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9257BCPZ-65?
AD9257BCPZ-65 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9257BCPZ-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 AD9257BCPZ-65?
For technical support, including AD9257BCPZ-65 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9257BCPZ-65 requirements.
6.How does Aetrix verify that AD9257BCPZ-65 is sourced from the original manufacturer or authorized distributors?
All AD9257BCPZ-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 AD9257BCPZ-65 meets industry standards.
7.What is the process for return or replacement of AD9257BCPZ-65?
All AD9257BCPZ-65 units undergo pre-shipment inspection (PSI). If there is an issue with AD9257BCPZ-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 AD9257BCPZ-65 part is unused and in its original packaging.
Return procedure for AD9257BCPZ-65:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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