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Analog Devices Inc. AD9643BCPZ-250
- Part No.:
- AD9643BCPZ-250
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD9643BCPZ-250.pdf
- Description:
- IC ADC 14BIT PIPELINED 64LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,891
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Product details
Overview
AD9643BCPZ-250 from Analog Devices is a dual-channel, 14-bit analog-to-digital converter (ADC) optimized for IF sampling in communications infrastructure. It delivers 250 MSPS sample rate, 70.6 dBFS SNR at 185 MHz input, and 85 dBc SFDR - enabling high-fidelity digitization of wideband RF signals in LTE base stations and software-defined radios.
For engineers reviewing the AD9643BCPZ-250 datasheet, AD9643BCPZ-250 pinout, AD9643BCPZ-250 application, or AD9643BCPZ-250 equivalent, key selection considerations include its LVDS output interface, dual-channel synchronization capability via SYNC input, 1.8 V single-supply operation, and support for up to 400 MHz IF input frequencies with 95 dB channel isolation.
Technical Context
The AD9643BCPZ-250 implements two independent, multistage pipelined ADC cores with integrated error correction logic and a duty cycle stabilizer to maintain performance under clock jitter. Its differential analog inputs accept 1.4–2.0 Vp-p signals with 1.75 Vp-p nominal full-scale range and feature 2.5 pF input capacitance and 20 kΩ effective input resistance.
Digital control uses a 3-wire SPI interface (CSB, SCLK, SDIO) supporting register readback and configuration of power modes, output formatting (interleaved or channel-multiplexed), and overrange detection. Output data is delivered via 14-bit LVDS pairs with ANSI-644 compliant voltage levels and programmable reduced-swing mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - supports high dynamic range signal capture with ≥11.2 ENOB at 185 MHz input frequency. |
| Max Sample Rate | 250 MSPS - enables digitization of instantaneous bandwidths up to 125 MHz per Nyquist zone. |
| SNR @ 185 MHz | 70.6 dBFS - ensures >11-bit effective resolution for demanding wireless receiver applications. |
| SFDR @ 185 MHz | 85 dBc - suppresses spurious content critical for multi-carrier LTE and WCDMA demodulation. |
| Input Bandwidth | 1000 MHz full-power bandwidth - supports direct IF sampling up to 400 MHz without external filtering degradation. |
| Power Consumption | 785 mW at 250 MSPS - balances performance and thermal management in dense RF front-end layouts. |
| Supply Voltage | 1.8 V AVDD/DRVDD - simplifies power delivery with single low-voltage rail and eliminates level-shifting for LVDS outputs. |
| Channel Isolation | 95 dB - prevents crosstalk between dual channels in I/Q demodulation and diversity receiver architectures. |
Pinout & Package
The AD9643BCPZ-250 is housed in a 64-lead LFCSP (9 mm × 9 mm) package with exposed paddle requiring soldering to AGND for thermal and electrical integrity. Pin functions are defined for two LVDS output modes: interleaved parallel and channel-multiplexed (even/odd). The following table reflects the interleaved parallel LVDS configuration, which is the default and most widely used mode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK+, CLK− | Differential clock input | Accepts 625 MHz max LVDS/CMOS/LVPECL clocks; internal DCS compensates for duty cycle variation to preserve aperture accuracy. |
| VIN+A/VIN−A, VIN+B/VIN−B | Differential analog inputs (Ch A & Ch B) | Support 1.4–2.0 Vp-p input range; 20 kΩ/2.5 pF input impedance enables direct connection to baluns or transformer-coupled RF paths. |
| D0+ to D13+, D0− to D13− | LVDS data outputs (14-bit per channel) | Deliver interleaved or multiplexed 14-bit samples at 250 MSPS; ANSI-644 compliant swing (250–450 mV) ensures noise immunity on PCB traces. |
| DCO+, DCO− | Data clock output | Provides source-synchronous LVDS clock aligned to data edges; essential for timing-critical FPGA or ASIC capture interfaces. |
| SYNC | Multi-device synchronization input | Enables deterministic phase alignment across multiple AD9643BCPZ-250 devices in phased-array or MIMO systems. |
| CSB, SCLK, SDIO | 3-wire SPI interface | Allows runtime configuration of output format, power modes, and register readback without interrupting conversion. |
| OEB, PDWN | Output enable and power-down control | Active-low OEB gates LVDS outputs; PDWN places device in 10 mW power-down state for rapid wake-up (250 µs). |
Key Features
| Feature | Design Value |
|---|---|
| Dual 14-bit ADC cores | Enables simultaneous I/Q sampling or diversity reception without external multiplexing, reducing system latency and board area. |
| Internal voltage reference | Eliminates need for external precision reference ICs, simplifying layout and improving temperature stability of full-scale calibration. |
| Integer 1-to-8 clock divider | Permits use of lower-frequency, lower-jitter master clocks (e.g., 312.5 MHz ÷ 2 = 156.25 MHz) while maintaining 250 MSPS sampling. |
| Flexible power-down modes | Reduces power to 10 mW (power-down) or 90 mW (standby), enabling dynamic power scaling in burst-mode receivers and battery-constrained test equipment. |
| 95 dB channel isolation | Ensures minimal signal leakage between ADC channels during concurrent wideband signal acquisition, critical for accurate beamforming algorithms. |
| LVDS output with DCO | Provides deterministic, low-skew data capture timing for FPGAs without requiring external clock forwarding circuitry or complex deskew logic. |
Applications
| Base Station Digital Front-End | LTE/WCDMA Multimode Receiver |
|---|---|
Use Scenario: Digitizing 120 MHz instantaneous bandwidth IF signals from zero-IF or low-IF radio transceivers in macrocell and small-cell base stations. IC Role / Device Role / Timing Role: Dual-channel ADC performing synchronized I/Q sampling at 250 MSPS with 95 dB isolation to preserve signal orthogonality. Use Value: Enables real-time processing of 4×20 MHz LTE carriers within a single device, reducing component count versus discrete single-channel solutions. |
Use Scenario: Supporting multimode operation across TD-SCDMA, WCDMA, and LTE bands in portable test instruments and network analyzers. IC Role / Device Role / Timing Role: High-SFDR ADC capturing wideband spectrum with 85 dBc spurious suppression to resolve adjacent-channel interference. Use Value: Maintains >70 dBFS SNR across 185 MHz input frequency, ensuring accurate EVM measurement for 64-QAM and 256-QAM modulation analysis. |
| Phased Array Radar Receiver | Ultrasound Beamformer |
Use Scenario: Acquiring time-aligned RF echoes from multiple antenna elements in X-band radar systems with sub-nanosecond inter-channel skew requirements. IC Role / Device Role / Timing Role: Dual ADC providing deterministic synchronization via SYNC input and matched pipeline latency (10 cycles) for coherent beam synthesis. Use Value: Achieves <0.1 ps rms aperture jitter and 95 dB crosstalk, enabling precise phase coherence across 16+ element arrays. |
Use Scenario: Digitizing 10–15 MHz analog ultrasound echo signals from 128-channel transducer arrays in portable diagnostic systems. IC Role / Device Role / Timing Role: Low-power dual ADC operating at 250 MSPS with 785 mW total consumption to meet thermal constraints in handheld enclosures. Use Value: Delivers 70.6 dBFS SNR at 185 MHz-equivalent baseband frequencies, preserving contrast resolution for deep-tissue imaging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9680BCPZ-500 | Higher 500 MSPS sample rate, 14-bit resolution, same LFCSP-64 package but requires 2.5 V DRVDD for LVDS outputs. | Targets wider instantaneous bandwidths (>250 MHz) and higher-order modulation schemes (1024-QAM) in 5G NR FR1. | Select when >250 MSPS sampling or extended IF bandwidth beyond 400 MHz is required; verify 2.5 V digital supply compatibility. |
| AD9625BCPZ-250 | Single-channel 14-bit, 250 MSPS ADC; identical analog performance and 1.8 V supply, but lacks dual-channel synchronization and interleaved output mode. | Suitable for cost-sensitive, space-constrained applications where only one signal path must be digitized. | Choose for simplified design when dual-channel functionality is unnecessary; saves PCB area and reduces SPI configuration complexity. |
Compared with AD9643BCPZ-250, AD9680BCPZ-500 offers double the sampling rate at the cost of higher power and stricter supply requirements, while AD9625BCPZ-250 provides identical per-channel performance in a smaller footprint but eliminates multi-channel coordination capabilities essential for I/Q and MIMO systems.
Availability
AD9643BCPZ-250 is available at Aetrix Electronics and suitable for LTE base station development, phased array radar prototyping, and ultrasound beamformer design requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for AD9643BCPZ-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 communications, industrial, automotive, and healthcare markets with precision data converters and RF solutions.
The AD9643 product line delivers dual-channel, high-speed ADCs designed specifically for broadband communications infrastructure - emphasizing low power, high SNR/SFDR, and deterministic synchronization in compact LFCSP packages.
FAQ
What is the maximum analog input frequency supported by the AD9643BCPZ-250?
The AD9643BCPZ-250 has a full-power bandwidth of 1000 MHz and supports IF sampling frequencies up to 400 MHz while maintaining specified AC performance including 70.6 dBFS SNR and 85 dBc SFDR. This allows direct digitization of second- or third-Nyquist zone signals without image-reject filtering, simplifying RF front-end design in wireless infrastructure applications. The AD9643BCPZ-250 achieves this using proprietary differential input architecture optimized for wideband linearity.
Does the AD9643BCPZ-250 require an external voltage reference?
No, the AD9643BCPZ-250 integrates a precision internal voltage reference, eliminating the need for external reference components and associated decoupling circuitry. This simplifies board layout, reduces BOM cost, and improves temperature stability of the full-scale range across the −40°C to +85°C industrial operating range. The AD9643BCPZ-250 maintains 1.75 Vp-p nominal input span with ±0.75 LSB DNL and ±3.5 LSB INL over temperature.
How does the SYNC input function in multi-device configurations?
The SYNC input on the AD9643BCPZ-250 enables deterministic phase alignment across multiple devices by resetting internal clock dividers and pipeline stages simultaneously upon assertion. When used with matched trace lengths and common clock distribution, it achieves sub-cycle inter-device skew - critical for coherent beamforming in radar and MIMO systems. The AD9643BCPZ-250 specifies tSSYNC = 0.3 ns setup and tHSYNC = 0.4 ns hold relative to CLK, ensuring robust synchronization at 250 MSPS.
What LVDS output modes does the AD9643BCPZ-250 support?
The AD9643BCPZ-250 supports two LVDS output formats selectable via SPI register configuration: interleaved parallel mode (14-bit A, 14-bit B, alternating per sample clock) and channel-multiplexed (even/odd) mode (all Channel A samples followed by all Channel B samples per frame). Both modes use ANSI-644 compliant differential outputs with programmable reduced-swing option (150–280 mV) to lower power and EMI. The AD9643BCPZ-250 delivers data with 10-cycle pipeline latency and DCO-synchronized timing.
What power-saving features are available on the AD9643BCPZ-250?
The AD9643BCPZ-250 offers three power states: active (785 mW at 250 MSPS), standby (90 mW with CLK inactive), and power-down (10 mW with all circuits disabled). Power-down mode retains register settings and wakes in 250 µs, while standby mode preserves analog bias points for faster resumption. These modes are controlled via the PDWN pin and SPI-configurable registers, allowing dynamic adaptation to traffic load in wireless infrastructure and portable test equipment. The AD9643BCPZ-250 also supports individual channel shutdown for further optimization.
AD9643BCPZ-250 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):
- 250M
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- LVDS - Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- 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:
- -
AD9643BCPZ-250 FAQ
1.How can I place an order for AD9643BCPZ-250 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9643BCPZ-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 AD9643BCPZ-250 reliable?
The price and inventory of AD9643BCPZ-250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9643BCPZ-250 is usually 5 days.
3.What payment methods are accepted for AD9643BCPZ-250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9643BCPZ-250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9643BCPZ-250?
AD9643BCPZ-250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9643BCPZ-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 AD9643BCPZ-250?
For technical support, including AD9643BCPZ-250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9643BCPZ-250 requirements.
6.How does Aetrix verify that AD9643BCPZ-250 is sourced from the original manufacturer or authorized distributors?
All AD9643BCPZ-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 AD9643BCPZ-250 meets industry standards.
7.What is the process for return or replacement of AD9643BCPZ-250?
All AD9643BCPZ-250 units undergo pre-shipment inspection (PSI). If there is an issue with AD9643BCPZ-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 AD9643BCPZ-250 part is unused and in its original packaging.
Return procedure for AD9643BCPZ-250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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