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Analog Devices Inc. AD9484BCPZ-500
- Part No.:
- AD9484BCPZ-500
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 56-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD9484BCPZ-500.pdf
- Description:
- IC ADC 8BIT PIPELINED 56LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:337
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Product details
Overview
AD9484BCPZ-500 from Analog Devices is an 8-bit, 500 MSPS monolithic analog-to-digital converter optimized for high dynamic performance in wideband communications systems. It features 1.8 V dual-supply operation (AVDD/DRVDD), integrated input buffer and on-chip reference, 1 GHz full-power analog bandwidth, LVDS SDR outputs, and clock duty cycle stabilization. It serves as the front-end digitizer in broadband cable reverse path receivers and RF test equipment.
For engineers reviewing the AD9484BCPZ-500 datasheet, AD9484BCPZ-500 pinout, AD9484BCPZ-500 application, or AD9484BCPZ-500 equivalent, key selection criteria include SNR at 250 MHz input (47 dBFS), ENOB (7.5 bits), SFDR (79 dBc), DNL/INL linearity (±0.1 LSB typical), and 56-lead LFCSP package thermal performance (θJA = 23.7°C/W).
Technical Context
The AD9484BCPZ-500 employs a pipelined switched-capacitor ADC architecture with sample-and-hold, digital error correction logic, and redundant-stage design to achieve 8-bit resolution at 500 MSPS. Its analog front end supports differential ac- or dc-coupled inputs with programmable 1.18–1.6 Vp-p range and internal 0.75 V reference.
Digital interface uses ANSI-644-compliant LVDS outputs (D0± to D7±, DCO±, OR±) with selectable offset binary/twos complement/Gray coding and integrated data capture clock. Serial port control (SPI via SDIO/SCLK/CSB) enables configuration of power-down, gain, data format, and test patterns without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - fixed word length enabling compact FPGA interface and low-latency processing pipelines. |
| Max Sample Rate | 500 MSPS - supports Nyquist-zone sampling up to 250 MHz input frequency with full dynamic performance. |
| SNR @ 250 MHz | 47 dBFS - enables >7-bit effective resolution in wideband IF sampling applications such as cable DOCSIS reverse path. |
| ENOB @ 250 MHz | 7.5 bits - confirms usable resolution under real-world wideband signal conditions at full speed. |
| Full-Power BW | 1 GHz - allows direct digitization of UHF signals without pre-filtering or downconversion in satellite subsystems. |
| Power Dissipation | 670 mW at 500 MSPS - low power for high-speed ADCs, reducing thermal load in dense RF front ends. |
| Analog Supply | 1.8 V AVDD - simplifies system-level power architecture by aligning with modern FPGA I/O voltage rails. |
Pinout & Package
The AD9484BCPZ-500 is housed in a 56-lead LFCSP_VQ (CP-56-5) package with exposed paddle soldered to AGND. Thermal resistance θJA = 23.7°C/W (4-layer board, still air). Pin 0 (exposed paddle) is AGND and must be connected to a quiet ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+, VIN− | Differential analog input | Accepts 1.18–1.6 Vp-p differential signal; internally biased to 1.7 V common-mode; requires matched source impedance for optimal SNR. |
| CLK+, CLK− | Differential clock input | Accepts CMOS/LVDS/LVPECL; internal 0.9 V common-mode bias; duty cycle stabilizer enables robust timing with ±15% duty cycle variation. |
| D0+ to D7+ | LVDS true data outputs | 8-bit parallel SDR output; ANSI-644 compliant; supports offset binary, twos complement, or Gray code formatting via SPI. |
| DCO+, DCO− | Data clock output | LVDS-aligned clock synchronized to output data edges; eliminates need for external strobe generation in FPGA capture logic. |
| OR+, OR− | Overrange indicator | Differential LVDS flag signaling input saturation; enables real-time clipping detection without additional logic. |
| VREF | Reference voltage I/O | Nominally 0.75 V; can monitor internal reference or accept external reference when enabled via SPI register. |
| PWDN | Power-down control | Active-high digital input; reduces power from 670 mW to 2.5–7 mW; enables rapid sleep/wake cycles in burst-mode systems. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated sample-and-hold + voltage reference | Eliminates external components for signal conditioning and reference decoupling, reducing BOM count and layout area. |
| LVDS SDR outputs with DCO | Enables reliable high-speed interfacing to Xilinx/Kintex or Intel/Arria FPGAs without external deserializers or timing alignment circuits. |
| Duty cycle stabilizer (DCS) | Allows use of non-50% duty cycle clocks (e.g., from PLLs or crystal oscillators) without SNR/SFDR degradation-critical for system-level clock tree flexibility. |
| Programmable input voltage range | Supports 1.18–1.6 Vp-p via SPI, enabling optimization for varying signal chain gain distribution and noise floor trade-offs. |
| Serial port interface (SPI) | Permits runtime reconfiguration of data format, power modes, gain, and test patterns-essential for adaptive test equipment and multi-standard radios. |
Applications
| Cable Reverse Path Receiver | RF Test Equipment |
|---|---|
|
Use Scenario: Digitizing upstream DOCSIS signals in HFC networks with 5–42 MHz bandwidth and high composite distortion. IC Role / Device Role / Timing Role: Primary ADC in analog front end; samples composite QAM signals at ≥5× Nyquist rate to preserve spectral fidelity. Use Value: 47 dBFS SNR and 79 dBc SFDR at 250 MHz enable accurate constellation analysis and MER measurement down to 40 dB. |
Use Scenario: Real-time spectrum analysis and modulation accuracy testing in benchtop signal analyzers. IC Role / Device Role / Timing Role: High-speed digitizer capturing transient RF bursts and wideband modulated waveforms. Use Value: 1 GHz analog bandwidth and 500 MSPS rate support direct IF sampling of LTE/WiMAX signals up to 250 MHz without image-reject filtering. |
| Satellite Subsystem Digitizer | Power Amplifier Linearization |
|
Use Scenario: Onboard telemetry digitization and payload monitoring in LEO satellite transponders operating at C/X-band IFs. IC Role / Device Role / Timing Role: Radiation-tolerant (industrial temp range −40°C to +85°C) ADC for space-qualified receiver chains. Use Value: Low 670 mW power and 23.7°C/W thermal resistance allow integration into thermally constrained payload modules without active cooling. |
Use Scenario: Capturing PA output for digital predistortion (DPD) feedback loop in 5G massive MIMO base stations. IC Role / Device Role / Timing Role: Wideband observation ADC feeding FPGA-based DPD engine with sub-ns timing alignment via DCO. Use Value: DCO± output provides deterministic data-to-clock skew (±0.07 ns), enabling precise time-domain correlation between transmit and feedback paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9434BCPZ-500 | 12-bit, 500 MSPS; higher resolution but 1.25 W power; no integrated reference; requires external buffer. | Better suited for precision instrumentation where ENOB > 9 bits is required; less suitable for power-constrained cable headends. | Select AD9434BCPZ-500 only when 12-bit resolution and SFDR > 85 dBc are mandatory and thermal budget allows +530 mW overhead. |
| ADC3660IRSBT | 16-bit, 125 MSPS; lower speed but superior SNR (72 dBFS); JESD204B interface; 1.8 V supply. | Targets high-fidelity IF sampling in radar and medical imaging-not viable for 500 MSPS cable or test equipment use cases. | Choose ADC3660IRSBT only for applications requiring >14-bit ENOB at ≤125 MSPS; not a functional substitute for AD9484BCPZ-500's speed-class role. |
Compared with AD9484BCPZ-500, AD9434BCPZ-500 trades power and integration for resolution, while ADC3660IRSBT abandons speed entirely for precision-neither offers drop-in compatibility, and both require PCB redesign and firmware adaptation.
Availability
AD9484BCPZ-500 is available at Aetrix Electronics and suitable for wireless infrastructure, cable access equipment, and communications test instrumentation requiring stable component supply across extended production lifecycles.
Supply support for AD9484BCPZ-500 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 DSP technologies, serving industrial, automotive, communications, and aerospace markets with precision signal processing solutions.
The AD9484 belongs to Analog Devices' high-speed ADC product line, designed specifically for wideband digitization in cost-sensitive, power-constrained RF systems including cable modems, spectrum analyzers, and satellite telemetry receivers.
FAQ
What is the maximum analog input frequency supported by the AD9484BCPZ-500 while maintaining full dynamic performance?
The AD9484BCPZ-500 maintains 47 dBFS SNR and 7.5-bit ENOB up to 250 MHz input frequency at 500 MSPS. Its 1 GHz full-power analog bandwidth permits sampling beyond the second Nyquist zone, but dynamic specifications degrade above 250 MHz-verified in Figure 9 of the Rev. A datasheet.
Does the AD9484BCPZ-500 require external decoupling capacitors on the VREF pin?
No. The AD9484BCPZ-500 includes an on-chip reference with no external decoupling required. The VREF pin can be used to monitor the internal 0.75 V reference or accept an external reference when enabled via SPI register configuration-both modes are validated in the General Description section.
Can the AD9484BCPZ-500 operate with a single-ended clock input?
Yes, the AD9484BCPZ-500 supports single-ended 1.8 V CMOS clock input up to 200 MHz using CLK+ driven directly and CLK− bypassed to ground via 0.1 µF capacitor and 39 kΩ resistor (Figure 34). For full 500 MSPS performance, differential clocking is required.
What is the latency of the AD9484BCPZ-500, and how is it defined?
The AD9484BCPZ-500 has a fixed latency of 15 clock cycles from sample edge to valid LVDS output data, as specified in Table 4 (Switching Specifications). This deterministic delay enables precise timing alignment in FPGA-based DPD and real-time signal processing pipelines.
How does the duty cycle stabilizer (DCS) in the AD9484BCPZ-500 improve system design flexibility?
The DCS in the AD9484BCPZ-500 retimes the nonsampling clock edge to produce an internal 50% duty cycle signal, allowing input clock duty cycles from 30% to 70% without SNR or SFDR degradation-enabling use of standard PLLs and crystal oscillators without external duty cycle correction circuitry.
AD9484BCPZ-500 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad, CSP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 500M
- 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:
- External, Internal
- Voltage - Supply, Analog:
- 1.75V ~ 1.9V
- Voltage - Supply, Digital:
- 1.75V ~ 1.9V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 56-LFCSP-VQ (8x8)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD9484BCPZ-500 FAQ
1.How can I place an order for AD9484BCPZ-500 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9484BCPZ-500 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 AD9484BCPZ-500 reliable?
The price and inventory of AD9484BCPZ-500 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9484BCPZ-500 is usually 5 days.
3.What payment methods are accepted for AD9484BCPZ-500?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9484BCPZ-500 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9484BCPZ-500?
AD9484BCPZ-500 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9484BCPZ-500 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 AD9484BCPZ-500?
For technical support, including AD9484BCPZ-500 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9484BCPZ-500 requirements.
6.How does Aetrix verify that AD9484BCPZ-500 is sourced from the original manufacturer or authorized distributors?
All AD9484BCPZ-500 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 AD9484BCPZ-500 meets industry standards.
7.What is the process for return or replacement of AD9484BCPZ-500?
All AD9484BCPZ-500 units undergo pre-shipment inspection (PSI). If there is an issue with AD9484BCPZ-500, 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 AD9484BCPZ-500 part is unused and in its original packaging.
Return procedure for AD9484BCPZ-500:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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