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Analog Devices Inc. AD9642BCPZ-250
- Part No.:
- AD9642BCPZ-250
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD9642BCPZ-250.pdf
- Description:
- IC ADC 14BIT PIPELINED 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:391
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Product details
Overview
AD9642BCPZ-250 from Analog Devices is a 14-bit, 250 MSPS analog-to-digital converter designed for high-speed communications signal acquisition. It features LVDS DDR outputs, an integrated 1.8 V voltage reference, and supports differential analog inputs up to 350 MHz. Its 390 mW power consumption at full rate and duty cycle stabilizer enable robust I/Q demodulation in LTE and TD-SCDMA baseband receivers.
For engineers reviewing the AD9642BCPZ-250 datasheet, AD9642BCPZ-250 pinout, AD9642BCPZ-250 application, or AD9642BCPZ-250 equivalent, key selection criteria include SNR (71.0 dBFS @ 185 MHz), SFDR (83 dBc @ 185 MHz), input noise (−152.0 dBFS/Hz), 1.8 V dual-supply operation, and 32-lead LFCSP package compatibility with AD9634/AD6672.
Technical Context
The AD9642BCPZ-250 implements a multistage differential pipelined ADC architecture with integrated error correction logic and a clock duty cycle stabilizer that maintains performance across varying input clock duty cycles. Its analog front end supports 1.4–2.0 Vp-p differential input ranges and exhibits 2.5 pF input capacitance with 20 kΩ effective input resistance.
Digital interface includes a 3-wire SPI port (SCLK, SDIO, CSB) for register configuration and readback, alongside parallel DDR LVDS data outputs (D0±–D13±) and a dedicated LVDS data clock output (DCO±). The device operates from separate 1.8 V analog (AVDD) and digital driver (DRVDD) supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete amplitude levels for high-fidelity RF signal digitization. |
| Max Sample Rate | 250 MSPS - enables Nyquist sampling of IF signals up to 125 MHz or complex baseband bandwidths up to 250 MHz. |
| SNR @ 185 MHz | 71.0 dBFS - ensures >11.4 ENOB for accurate representation of wideband communication waveforms. |
| SFDR @ 185 MHz | 83 dBc - suppresses spurious content critical for adjacent-channel rejection in multi-carrier systems. |
| Input Noise Density | −152.0 dBFS/Hz - minimizes quantization-limited noise floor in high-gain receiver chains. |
| Total Power | 390 mW @ 250 MSPS - balances performance and thermal load in compact, air-cooled RF modules. |
| Analog Input BW | 1000 MHz full-power bandwidth - supports direct sampling of UHF and L-band signals without external filtering. |
Pinout & Package
The AD9642BCPZ-250 is housed in a 32-lead, 5 mm × 5 mm LFCSP package with exposed thermal paddle (AGND) requiring soldering to PCB ground plane for thermal and electrical integrity. Pin 25 is DNC (do not connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK+, CLK− | Differential clock input | Accepts CMOS/LVDS/LVPECL clocks up to 625 MHz; internal DCS compensates for duty cycle variation. |
| VIN+, VIN− | Differential analog input | Supports 1.4–2.0 Vp-p range; 20 kΩ/2.5 pF input impedance simplifies anti-alias filter design. |
| D0±–D13± | DDR LVDS data outputs | 14-bit parallel DDR LVDS bus (ANSI-644); LSB-to-MSB ordering enables synchronous capture with DCO±. |
| DCO+, DCO− | Data clock output | LVDS-sourced clock aligned to data edges; enables deterministic timing in FPGA-based capture interfaces. |
| SCLK, SDIO, CSB | SPI control interface | 3-wire serial port (1.8 V logic) for real-time gain/offset calibration, test mode, and power-state control. |
| AVDD, DRVDD | Power supplies | Separate 1.8 V analog and digital driver rails isolate noise-sensitive conversion core from LVDS switching transients. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated voltage reference | Eliminates external reference IC and associated layout complexity while maintaining ±0.6 LSB INL over temperature. |
| Duty cycle stabilizer (DCS) | Compensates for clock asymmetry without requiring external duty-cycle correction circuitry or PLL re-timing. |
| Flexible power-down modes | Reduces power to 5 mW in full power-down state, enabling rapid wake-up (<100 μs) for burst-mode receivers. |
| Pin compatibility with AD9634/AD6672 | Allows hardware reuse across 12-bit and 14-bit ADC tiers in same PCB footprint, reducing redesign effort. |
| Integer 1-to-8 clock divider | Enables use of lower-frequency, lower-jitter master clocks (e.g., 312.5 MHz ÷ 2 = 156.25 MHz) while achieving 250 MSPS sampling. |
Applications
| Direct RF Sampling Receiver | I/Q Demodulation System |
|---|---|
Use Scenario: Digitizing 300–500 MHz RF signals directly at antenna front-end without downconversion. IC Role / Device Role / Timing Role: High-speed ADC capturing instantaneous RF envelope and phase for digital predistortion and spectral analysis. Use Value: 1000 MHz full-power bandwidth and −152.0 dBFS/Hz noise density preserve signal fidelity across cellular/WiMAX bands. | Use Scenario: Converting quadrature-mixed IF outputs (e.g., 70–140 MHz) in software-defined radio transceivers. IC Role / Device Role / Timing Role: Simultaneous sampling of I and Q paths with matched latency (10-cycle pipeline) and skew <0.7 ns. Use Value: Matched channel gain/phase response and 71.0 dBFS SNR ensure <−70 dBc EVM in 256-QAM LTE uplinks. |
| Ultrasound Beamformer | Broadband Test Equipment |
Use Scenario: Digitizing echo returns from phased-array transducers operating at 5–15 MHz center frequencies. IC Role / Device Role / Timing Role: High dynamic range digitizer for time-of-flight measurement and synthetic aperture processing. Use Value: 83 dBc SFDR and ±0.6 LSB INL at 25°C enable detection of weak echoes amid strong near-field reflections. | Use Scenario: Signal acquisition stage in vector signal analyzers and high-speed oscilloscopes targeting >100 MHz analog bandwidth. IC Role / Device Role / Timing Role: Primary digitization engine delivering calibrated, low-jitter samples to FPGA-based FFT engines. Use Value: 250 MSPS rate with deterministic 10-cycle latency and LVDS DCO synchronization simplifies real-time spectrum computation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9643BCPZ-250 | 14-bit, 250 MSPS, JESD204B serial output instead of LVDS; higher power (495 mW); no internal reference. | Targets FPGA platforms with JESD204B IP support; requires external reference and serializer/deserializer logic. | Select when board space is constrained and FPGA has native JESD204B PHY; avoid if legacy LVDS interface or reference integration is required. |
| ADS54J60IRGCT | 14-bit, 500 MSPS, 1.8 V supply, but uses JESD204B v1.1; higher SFDR (85 dBc @ 185 MHz); no DCS or integrated reference. | Designed for ultra-wideband radar and electronic warfare; demands higher clock quality and external reference management. | Choose for >250 MSPS throughput needs; not suitable as drop-in replacement due to different pinout, interface, and power sequencing. |
Compared with AD9643BCPZ-250 and ADS54J60IRGCT, the AD9642BCPZ-250 offers superior ease of integration via LVDS parallel output, built-in reference, and duty cycle stabilization-critical for cost-sensitive, space-constrained communications equipment where FPGA resources are limited.
Availability
AD9642BCPZ-250 is available at Aetrix Electronics and suitable for LTE infrastructure, medical ultrasound imaging, and broadband test equipment requiring stable component supply across extended production lifecycles.
Supply support for AD9642BCPZ-250 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 technologies, serving precision instrumentation, communications, and industrial markets.
The AD9642 product line delivers high-speed, high-resolution ADCs optimized for communications infrastructure and instrumentation, emphasizing low power, small form factor, and seamless FPGA interfacing.
FAQ
What is the maximum analog input frequency supported by the AD9642BCPZ-250?
The AD9642BCPZ-250 specifies a full-power bandwidth of 1000 MHz, meaning it can accurately digitize analog signals with fundamental frequencies up to 1 GHz while maintaining full-scale amplitude response. This capability supports direct RF sampling in L- and S-band applications without requiring external bandpass filtering prior to the ADC input.
Does the AD9642BCPZ-250 require an external voltage reference?
No, the AD9642BCPZ-250 integrates a precision internal voltage reference, eliminating the need for external reference components. This simplifies system design, reduces board area, and improves long-term stability-verified by ±0.6 LSB integral nonlinearity at 25°C and ±2.5 LSB over the full −40°C to +85°C industrial temperature range.
How does the duty cycle stabilizer (DCS) in the AD9642BCPZ-250 improve system performance?
The DCS in the AD9642BCPZ-250 actively corrects input clock duty cycle variations, ensuring consistent sampling aperture timing regardless of clock source asymmetry. This preserves SNR and SFDR performance-measured at 71.0 dBFS and 83 dBc respectively at 185 MHz-without requiring external clock conditioning circuits or high-cost jitter-optimized oscillators.
What is the power consumption of the AD9642BCPZ-250 at its maximum sample rate?
At 250 MSPS, the AD9642BCPZ-250 consumes 390 mW total power: 360 mW from AVDD (136 mA) and DRVDD (67 mA) supplies combined. Standby mode draws 50 mW, and full power-down reduces consumption to just 5 mW-enabling energy-efficient operation in battery-powered or thermally constrained systems.
Is the AD9642BCPZ-250 pin-compatible with other Analog Devices ADCs?
Yes, the AD9642BCPZ-250 shares the same 32-lead LFCSP package and pinout with the AD9634 (12-bit, 250 MSPS) and AD6672 (11-bit, 250 MSPS), enabling straightforward migration paths between resolution tiers without PCB redesign. This compatibility extends to power, ground, clock, analog input, and SPI control pins.
AD9642BCPZ-250 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad, CSP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 250M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- LVDS - Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Pipelined
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 1.7V ~ 1.9V
- Voltage - Supply, Digital:
- 1.7V ~ 1.9V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 32-LFCSP (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD9642BCPZ-250 FAQ
1.How can I place an order for AD9642BCPZ-250 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9642BCPZ-250 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 AD9642BCPZ-250 reliable?
The price and inventory of AD9642BCPZ-250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9642BCPZ-250 is usually 5 days.
3.What payment methods are accepted for AD9642BCPZ-250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9642BCPZ-250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9642BCPZ-250?
AD9642BCPZ-250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9642BCPZ-250 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 AD9642BCPZ-250?
For technical support, including AD9642BCPZ-250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9642BCPZ-250 requirements.
6.How does Aetrix verify that AD9642BCPZ-250 is sourced from the original manufacturer or authorized distributors?
All AD9642BCPZ-250 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 AD9642BCPZ-250 meets industry standards.
7.What is the process for return or replacement of AD9642BCPZ-250?
All AD9642BCPZ-250 units undergo pre-shipment inspection (PSI). If there is an issue with AD9642BCPZ-250, 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 AD9642BCPZ-250 part is unused and in its original packaging.
Return procedure for AD9642BCPZ-250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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