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Analog Devices Inc. AD9257TCPZ-65-EP
- Part No.:
- AD9257TCPZ-65-EP
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD9257TCPZ-65-EP.pdf
- Description:
- IC ADC 14BIT PIPELINED 64LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:739
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Product details
Overview
AD9257TCPZ-65-EP from Analog Devices is an octal, 14-bit, 65 MSPS serial LVDS analog-to-digital converter operating from a single 1.8 V supply, featuring 75.5 dB SNR and 91 dBc SFDR at Nyquist, with 650 MHz full-power analog bandwidth and military-grade −55°C to +125°C operation for defense and aerospace signal acquisition systems.
For engineers reviewing the AD9257TCPZ-65-EP datasheet, AD9257TCPZ-65-EP pinout, AD9257TCPZ-65-EP application, or AD9257TCPZ-65-EP equivalent, key selection considerations include octal-channel synchronization, LVDS DDR output timing alignment, low-power per-channel scalability (55 mW/channel), built-in digital test pattern generation, and RoHS-compliant 64-lead LFCSP packaging with exposed thermal pad grounding requirement.
Technical Context
The AD9257TCPZ-65-EP integrates eight independent 14-bit ADC cores sharing a common sample-and-hold and clock multiplier circuitry, supporting simultaneous sampling with programmable pipeline latency of 16 clock cycles and aperture jitter of 0.1 ps rms. It uses internal 1.0 V reference with 2 V p-p differential input range and supports both ANSI-644 and reduced-swing LVDS output modes.
Digital interface includes SPI-configurable clock/data alignment, frame/data clock outputs (FCO/DCO), individual channel power-down (1 mW total standby), and flexible bit orientation (twos complement default). Input common-mode voltage is fixed at 0.9 V via VCM pin, and analog inputs accept LVPECL/LVDS/CMOS clock signals up to 520 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete amplitude levels for high-fidelity digitization of ultrasound and RF baseband signals. |
| Sampling Rate | 65 MSPS - supports real-time capture of IF signals up to 32.5 MHz without aliasing under Nyquist criterion. |
| SNR / SFDR | 75.5 dBFS / 91 dBc (to Nyquist) - enables clean spectral separation in quadrature radio receivers and medical beamforming. |
| Analog Bandwidth | 650 MHz - preserves signal integrity for wideband optical networking and diversity receiver front-ends. |
| Power per Channel | 55 mW at 65 MSPS - allows eight-channel digitization within 464–547 mW total dissipation using ANSI-644 LVDS mode. |
| Operating Temperature | −55°C to +125°C - qualified for embedded avionics, radar subsystems, and downhole instrumentation without derating. |
| Digital Interface | Serial LVDS DDR with FCO/DCO - eliminates parallel bus routing complexity and reduces PCB layer count in space-constrained modules. |
Pinout & Package
The AD9257TCPZ-65-EP is housed in a RoHS-compliant, 64-lead LFCSP_WQ package (9 mm × 9 mm body, CP-64-17), requiring soldering of the exposed thermal pad (Pin 0, AGND, EP) directly to the PCB ground plane for thermal reliability and analog performance stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVDD (Pins 1,4,7,8,11,12,37,42,45,48,51,59,62) | Analog Power Supply | 1.8 V ±0.1 V supply for all analog sections; decoupling required per pin due to high-frequency current demands. |
| DRVDD (Pins 14,35) | Digital Output Driver Supply | 1.8 V supply dedicated to LVDS output drivers; separate from AVDD to isolate digital switching noise from analog core. |
| VIN± A–H (Pins 2–3,5–6,43–44,46–47,49–50,52–53,60–61,63–64) | Differential Analog Inputs | Eight independent 2 V p-p differential input pairs; each pair referenced to 0.9 V common-mode via VCM pin. |
| D± A–H (Pins 33–34,31–32,29–30,27–28,21–22,19–20,17–18,15–16) | LVDS Serial Data Outputs | Eight differential LVDS data lanes (DDR), each carrying 14-bit samples; requires matched trace lengths and 100 Ω termination. |
| DCO± / FCO± (Pins 23–24 / 25–26) | Data & Frame Clock Outputs | LVDS clocks synchronized to data edges; DCO operates at 455 MHz (DDR), FCO marks byte boundaries for FPGA capture alignment. |
| CLK± (Pins 9–10) | Differential Sample Clock Input | Accepts LVPECL/LVDS/CMOS; internal multiplier generates LVDS serial clock; supports up to 520 MHz input frequency. |
| SCLK/DTP, SDIO/DFS, CSB (Pins 38–40) | SPI Serial Port Interface | 3-wire SPI (CSB/SCLK/SDIO) configures power modes, test patterns, clock alignment, and output resolution; DFS selects data format. |
| PDWN, SYNC (Pins 41,58) | Control Inputs | PDWN enables global or per-channel power-down; SYNC resets internal clock divider for multi-device synchronization. |
Key Features
| Feature | Design Value |
|---|---|
| Octal 14-bit ADC in single LFCSP | Reduces board area by >70% versus eight discrete 14-bit converters; eliminates inter-channel skew in time-sensitive beamforming. |
| Programmable LVDS output swing | Supports ANSI-644 (±350 mV) or low-power reduced-swing (±200 mV) mode-enables trade-off between signal integrity and EMI/power in dense layouts. |
| Built-in digital test pattern generation | Includes deterministic, pseudorandom, and custom SPI-loaded patterns-eliminates external pattern generators during production test and field diagnostics. |
| Individual channel power-down | Disables unused channels to reduce total power by ~55 mW per channel; maintains <1 mW standby when all eight are off. |
| Military temperature qualification | Qualified per AQEC standard with full DC/AC specs guaranteed across −55°C to +125°C-no derating needed for harsh-environment deployment. |
Applications
| Medical Ultrasound Beamforming | Quadrature Radio Receiver |
|---|---|
Use Scenario: Real-time digital beam synthesis from 64+ transducer elements in portable ultrasound scanners. IC Role / Device Role / Timing Role: Simultaneous octal sampling of I/Q baseband channels with sub-ns inter-channel skew and deterministic pipeline latency. Use Value: Enables coherent summation of echo returns with 75.5 dB SNR, supporting B-mode resolution ≤0.5 mm at 15 MHz center frequency. |
Use Scenario: Direct sampling of complex IF signals in software-defined radios with image rejection requirements >70 dB. IC Role / Device Role / Timing Role: Dual-path (I/Q) digitization across four AD9257TCPZ-65-EP devices, synchronized via SYNC and CLK± distribution. Use Value: 91 dBc SFDR suppresses third-order intermodulation products, allowing adjacent-channel interference rejection in 20 MHz LTE bands. |
| Optical Network Monitoring | Aerospace Radar Front-End |
Use Scenario: High-speed monitoring of DWDM channel power and OSNR in coherent optical line cards. IC Role / Device Role / Timing Role: Digitizing photodiode outputs from multiple wavelength taps with 650 MHz analog bandwidth and 14-bit resolution. Use Value: Captures transient power surges and modulation artifacts with 0.1 ps rms aperture jitter, enabling accurate BER estimation. |
Use Scenario: Pulse-Doppler radar digitization in airborne electronic warfare pods operating at extended temperature ranges. IC Role / Device Role / Timing Role: Eight-channel IF sampling of dechirped radar returns with guaranteed −55°C to +125°C operation and radiation-tolerant packaging. Use Value: Maintains 72.8 dB SNR at 19.7 MHz input across full military temperature range, preserving target detection sensitivity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9257BCPZ-65 | Commercial temperature grade (−40°C to +85°C); identical electrical specs and pinout; no AQEC qualification or extended temp testing. | Suitable for industrial test equipment and non-military medical systems where extended temperature is not required. | Select AD9257BCPZ-65 for cost-sensitive commercial designs with standard temp range and same footprint. |
| AD9637BCPZ-125 | 12-bit, 125 MSPS octal ADC; higher speed but lower resolution; 72.5 dB SNR; shares same LFCSP-64 package and SPI interface. | Better suited for wideband spectrum analysis where speed outweighs dynamic range, e.g., RF spectrum monitoring. | Choose AD9637BCPZ-125 when system requires >100 MSPS sampling and can accept 12-bit ENOB trade-off. |
Compared with AD9257TCPZ-65-EP, AD9257BCPZ-65 offers identical functionality at lower cost for non-military use, while AD9637BCPZ-125 trades 2-bit resolution for 92% higher sample rate-making it viable only where speed dominates SNR requirements.
Availability
AD9257TCPZ-65-EP is available at Aetrix Electronics and suitable for defense electronics, aerospace avionics, and medical imaging systems requiring stable component supply across extended temperature and long product lifecycles.
Supply support for AD9257TCPZ-65-EP 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 design centers worldwide and a legacy of innovation in precision data conversion.
The AD9257-EP product line delivers radiation-hardened, temperature-qualified octal ADCs for mission-critical defense and aerospace applications where reliability, longevity, and guaranteed parametric performance under extreme conditions are mandatory.
FAQ
What is the maximum analog input frequency supported by the AD9257TCPZ-65-EP?
The AD9257TCPZ-65-EP features a full-power analog bandwidth of 650 MHz, meaning it maintains specified SNR and SFDR performance for input signals up to that frequency. At 65 MSPS sampling, the Nyquist limit is 32.5 MHz, so the device supports both baseband sampling and undersampling of IF signals well into the UHF band, provided anti-alias filtering is applied appropriately before the ADC inputs.
Does the AD9257TCPZ-65-EP require an external reference voltage?
No, the AD9257TCPZ-65-EP includes an internal 1.0 V reference with ±1% accuracy over temperature, eliminating the need for external reference components in most applications. The VREF pin can be used as input or output depending on SENSE pin configuration, and the internal reference supports the specified 2 V p-p differential input range without external scaling.
How is synchronization achieved across multiple AD9257TCPZ-65-EP devices?
Multiple AD9257TCPZ-65-EP devices synchronize via the shared SYNC input (Pin 58) and distributed differential CLK± signals. Asserting SYNC resets the internal clock divider simultaneously across all devices, ensuring deterministic phase alignment of sampling instants and LVDS output framing. This enables coherent multi-chip sampling for phased-array radar and ultrasound systems.
What is the purpose of the RBIAS pin on the AD9257TCPZ-65-EP?
The RBIAS pin (Pin 54) sets the analog bias current for the internal amplifier stages. It must be connected to a 10 kΩ (1% tolerance) resistor to AGND to ensure proper operation and meet specified AC performance metrics including SNR and SFDR. Omitting or misconfiguring this resistor degrades dynamic performance and may cause gain error drift.
Can the AD9257TCPZ-65-EP operate with a single power supply rail?
Yes, the AD9257TCPZ-65-EP operates from a single 1.8 V supply for both analog (AVDD) and digital output driver (DRVDD) domains. While AVDD and DRVDD are separate pins, they are both rated for 1.8 V ±0.1 V and may be supplied from the same regulator if adequate PSRR (>52 dB AVDD, >71 dB DRVDD) and local decoupling are maintained to prevent digital switching noise from coupling into analog sections.
AD9257TCPZ-65-EP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-WFQFN 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:
- -55°C ~ 125°C
- Supplier Device Package:
- 64-LFCSP (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD9257TCPZ-65-EP FAQ
1.How can I place an order for AD9257TCPZ-65-EP through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9257TCPZ-65-EP 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 AD9257TCPZ-65-EP reliable?
The price and inventory of AD9257TCPZ-65-EP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9257TCPZ-65-EP is usually 5 days.
3.What payment methods are accepted for AD9257TCPZ-65-EP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9257TCPZ-65-EP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9257TCPZ-65-EP?
AD9257TCPZ-65-EP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9257TCPZ-65-EP 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 AD9257TCPZ-65-EP?
For technical support, including AD9257TCPZ-65-EP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9257TCPZ-65-EP requirements.
6.How does Aetrix verify that AD9257TCPZ-65-EP is sourced from the original manufacturer or authorized distributors?
All AD9257TCPZ-65-EP 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 AD9257TCPZ-65-EP meets industry standards.
7.What is the process for return or replacement of AD9257TCPZ-65-EP?
All AD9257TCPZ-65-EP units undergo pre-shipment inspection (PSI). If there is an issue with AD9257TCPZ-65-EP, 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 AD9257TCPZ-65-EP part is unused and in its original packaging.
Return procedure for AD9257TCPZ-65-EP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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