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Analog Devices Inc. AD9634BCPZ-250
- Part No.:
- AD9634BCPZ-250
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD9634BCPZ-250.pdf
- Description:
- IC ADC 12BIT PIPELINED 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,830
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Product details
Overview
AD9634BCPZ-250 from Analog Devices is a 12-bit, 250 MSPS analog-to-digital converter optimized for high-bandwidth communications receivers. It features LVDS DDR outputs, integrated 1.8 V voltage reference, and a duty cycle stabilizer for clock jitter resilience. Its 69.7 dBFS SNR at 185 MHz input and 87 dBc SFDR support demanding I/Q demodulation in LTE and WiMAX baseband processing.
For engineers reviewing the AD9634BCPZ-250 datasheet, AD9634BCPZ-250 pinout, AD9634BCPZ-250 application, or AD9634BCPZ-250 equivalent, key selection criteria include its 250 MSPS sample rate, −150.6 dBFS/Hz input noise floor, 360 mW power consumption at full speed, LVDS output compliance (ANSI-644), and 32-lead LFCSP package with exposed thermal paddle.
Technical Context
The AD9634BCPZ-250 implements a multistage differential pipelined ADC architecture with integrated error correction logic and supports up to 350 MHz analog input bandwidth. Its integer 1-to-8 clock divider accepts up to 625 MHz input, enabling flexible system clocking while maintaining performance across 1.4–2.0 Vp-p analog input ranges.
Duty cycle stabilization compensates for clock asymmetry, preserving SNR/SFDR at high input frequencies. Serial port control uses a 3-wire SPI-compatible interface (CSB, SCLK, SDIO) for register configuration, overrange detection, and power mode management including standby (50 mW) and power-down (5 mW) states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete amplitude levels for high-fidelity signal digitization. |
| Max Sample Rate | 250 MSPS - enables Nyquist-limited capture of signals up to 125 MHz without aliasing. |
| SNR @ 185 MHz | 69.7 dBFS - ensures >11.1 effective bits (ENOB) for accurate wideband signal reconstruction. |
| SFDR @ 185 MHz | 87 dBc - suppresses spurious content critical for multi-carrier communication systems. |
| Input Noise Density | −150.6 dBFS/Hz - minimizes quantization-limited dynamic range loss in low-level RF sampling. |
| Power @ 250 MSPS | 360 mW - balances performance and thermal load in space-constrained wireless infrastructure designs. |
| Analog Supply | 1.8 V AVDD - simplifies power delivery using standard low-voltage DC/DC converters. |
| Digital Output | LVDS DDR - reduces EMI and supports high-speed data transfer over PCB traces up to 20 cm. |
Pinout & Package
The AD9634BCPZ-250 is housed in a 32-lead, 5 mm × 5 mm LFCSP package with an exposed thermal paddle that must be soldered to the PCB ground plane for proper operation and thermal reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK+, CLK− | Differential clock input | Accepts CMOS/LVDS/LVPECL clocks; DCS circuit corrects duty cycle distortion to maintain sampling accuracy. |
| VIN+, VIN− | Differential analog input | Supports 1.4–2.0 Vp-p input range; 20 kΩ input resistance and 2.5 pF capacitance define AC coupling network design. |
| VCM | Common-mode bias output | Provides 0.9 V reference for external input termination; requires 0.1 µF decoupling to AGND. |
| D0±/D1± to D10±/D11± | DDR LVDS data outputs | 12-bit parallel DDR LVDS bus (ANSI-644); LSB-to-MSB ordering enables direct FPGA interface with minimal serialization. |
| DCO± | Data clock output | LVDS clock synchronized to data edges; used for timing capture in receiving logic (e.g., FPGA IDELAY/ISERDES). |
| OR± | Overrange indicator | Differential flag signaling analog input saturation; allows real-time gain adjustment or clipping mitigation in closed-loop systems. |
| CSB, SCLK, SDIO | SPI control interface | 3-wire serial port for register read/write; supports configuration of DCS, power modes, and test patterns without external logic. |
| AVDD, DRVDD | Power supplies | Separate 1.8 V analog and digital driver rails reduce supply coupling; multiple AVDD pins improve PSRR. |
| AGND / Exposed Paddle | Analog ground | Primary return path for analog circuitry; exposed paddle must be solidly connected to PCB ground plane for thermal and noise integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated voltage reference | Eliminates external reference IC and associated layout complexity while maintaining ±0.4 LSB INL over temperature. |
| Duty cycle stabilizer (DCS) | Compensates for clock asymmetry up to ±20% duty cycle deviation, preserving SNR above 180 MHz input frequency. |
| Flexible input range | 1.4–2.0 Vp-p programmable span allows optimization for signal chain gain distribution and noise floor trade-offs. |
| Low-power operation modes | Standby (50 mW) and power-down (5 mW) states enable rapid wake-up (10 µs / 100 µs) for burst-mode or TDD applications. |
| Fast overrange detection | OR± outputs respond within 3 pipeline cycles (30 ns at 250 MSPS), enabling immediate AGC or gain switching in receiver front ends. |
Applications
| Communications Base Stations | I/Q Demodulation Systems |
|---|---|
Use Scenario: Digitizing downconverted RF signals in macrocell and small-cell LTE/WiMAX transceivers. IC Role / Device Role / Timing Role: Primary ADC in zero-IF or low-IF receiver chains, capturing complex baseband I/Q pairs at 2× symbol rate. Use Value: 87 dBc SFDR at 185 MHz prevents adjacent-channel interference in dense spectral deployments. | Use Scenario: Converting quadrature-mixed IF outputs for digital signal processing in software-defined radios. IC Role / Device Role / Timing Role: High-fidelity sampling engine feeding FPGA-based CORDIC, FFT, and channel estimation blocks. Use Value: 69.7 dBFS SNR ensures >11-bit ENOB across 100+ MHz instantaneous bandwidth for accurate phase/amplitude recovery. |
| Ultrasound Beamforming | Smart Antenna Systems |
Use Scenario: Sampling echo return signals from phased-array transducers operating at 5–15 MHz center frequencies. IC Role / Device Role / Timing Role: Channel ADC in multi-element receive paths, requiring matched gain/phase response across parallel channels. Use Value: 0.4 LSB DNL and ±0.6 LSB INL guarantee consistent beam pattern fidelity and sidelobe suppression. | Use Scenario: Digitizing spatially diverse antenna element outputs for adaptive nulling and DOA estimation. IC Role / Device Role / Timing Role: Synchronized sampling node in distributed MIMO front end with deterministic latency (10-cycle pipeline delay). Use Value: LVDS DDR outputs and DCO± clock simplify timing alignment across 8–64 channel arrays without external deserializers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9642BCPZ-250 | 14-bit resolution, identical 250 MSPS rate and pinout; higher 74.5 dBFS SNR but 500 mW power. | Better dynamic range for low-SNR radar or medical imaging; less suitable for power-constrained portable radios. | Select when ENOB >12.2 bits is required and thermal budget allows +140 mW. |
| AD6672BCPZ-250 | 11-bit resolution, 250 MSPS, same LFCSP package; lower 66.5 dBFS SNR but 275 mW power and integrated DDC. | Targeted at direct RF sampling with on-chip NCO and decimation; lacks DCS and flexible input range. | Select when digital downconversion is needed on-die and 11-bit ENOB suffices for wideband monitoring. |
Compared with AD9642BCPZ-250 and AD6672BCPZ-250, the AD9634BCPZ-250 delivers optimal balance of 12-bit precision, 69.7 dBFS SNR, and 360 mW efficiency-making it ideal for cost-sensitive, thermally constrained communications receivers where 11-bit resolution is insufficient and 14-bit overhead is unjustified.
Availability
AD9634BCPZ-250 is available at Aetrix Electronics and suitable for communications infrastructure, ultrasound equipment, and broadband data acquisition systems requiring stable component supply across extended production lifecycles.
Supply support for AD9634BCPZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD9634 product line delivers high-speed, low-power ADCs for communications, instrumentation, and medical imaging-designed to replace legacy flash and sigma-delta architectures with pipelined performance at reduced power and cost.
FAQ
What is the maximum analog input frequency supported by the AD9634BCPZ-250?
The AD9634BCPZ-250 supports analog input frequencies up to 350 MHz while maintaining specified SNR and SFDR performance. Its full power bandwidth is rated at 1000 MHz, and typical SNR remains above 67.8 dBFS even at 220 MHz input under −1 dBFS conditions, making it suitable for undersampled RF applications in direct-conversion receivers.
Does the AD9634BCPZ-250 require an external voltage reference?
No, the AD9634BCPZ-250 integrates a precision internal voltage reference, eliminating the need for external reference components. This simplifies board layout and reduces bill-of-materials cost while ensuring stable 1.75 Vp-p full-scale input range and <±0.4 LSB INL over the industrial temperature range (−40°C to +85°C).
How does the duty cycle stabilizer (DCS) improve ADC performance in the AD9634BCPZ-250?
The DCS in the AD9634BCPZ-250 actively corrects clock duty cycle distortion, allowing the ADC to maintain 69.7 dBFS SNR and 87 dBc SFDR even with highly asymmetric input clocks. Without DCS enabled, aperture uncertainty increases significantly-especially above 100 MHz-degrading ENOB and introducing harmonic distortion in wideband sampling.
What is the pipeline latency of the AD9634BCPZ-250, and why does it matter?
The AD9634BCPZ-250 has a fixed pipeline latency of 10 clock cycles, which is deterministic and independent of sample rate or configuration. This predictability is essential for time-critical applications like digital predistortion (DPD) feedback loops and real-time beamforming, where precise alignment between transmit and receive data paths must be maintained across FPGA or ASIC logic stages.
Can the AD9634BCPZ-250 operate with a 1.4 Vp-p analog input range?
Yes, the AD9634BCPZ-250 supports a user-selectable analog input range from 1.4 Vp-p to 2.0 Vp-p, with 1.75 Vp-p nominal. Configuring for 1.4 Vp-p lowers full-scale sensitivity, improving headroom for high-PAPR signals such as OFDM waveforms-while retaining 12-bit resolution and specified DNL/INL performance per the datasheet.
AD9634BCPZ-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:
- 12
- 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:
- -
AD9634BCPZ-250 FAQ
1.How can I place an order for AD9634BCPZ-250 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9634BCPZ-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 AD9634BCPZ-250 reliable?
The price and inventory of AD9634BCPZ-250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9634BCPZ-250 is usually 5 days.
3.What payment methods are accepted for AD9634BCPZ-250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9634BCPZ-250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9634BCPZ-250?
AD9634BCPZ-250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9634BCPZ-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 AD9634BCPZ-250?
For technical support, including AD9634BCPZ-250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9634BCPZ-250 requirements.
6.How does Aetrix verify that AD9634BCPZ-250 is sourced from the original manufacturer or authorized distributors?
All AD9634BCPZ-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 AD9634BCPZ-250 meets industry standards.
7.What is the process for return or replacement of AD9634BCPZ-250?
All AD9634BCPZ-250 units undergo pre-shipment inspection (PSI). If there is an issue with AD9634BCPZ-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 AD9634BCPZ-250 part is unused and in its original packaging.
Return procedure for AD9634BCPZ-250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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