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Analog Devices Inc. AD9251BCPZRL7-20
- Part No.:
- AD9251BCPZRL7-20
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD9251BCPZRL7-20.pdf
- Description:
- IC ADC 14BIT PIPELINED 64LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,670
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Product details
Overview
AD9251BCPZRL7-20 from Analog Devices is a dual-channel, 14-bit, 20 MSPS analog-to-digital converter operating from a single 1.8 V analog supply with 2 Vp-p differential input, 74.3 dBFS SNR at 9.7 MHz, and ±0.45 LSB DNL. It integrates on-chip voltage reference, sample-and-hold, and serial port control for I/Q demodulation in diversity radio systems.
For engineers reviewing the AD9251BCPZRL7-20 datasheet, AD9251BCPZRL7-20 pinout, AD9251BCPZRL7-20 application, or AD9251BCPZRL7-20 equivalent, this page delivers verified specifications, package mapping, functional pin roles, real-world use cases, and validated alternative parts for communication receiver design, portable ultrasound, and battery-powered instrumentation.
Technical Context
The AD9251BCPZRL7-20 implements a multistage differential pipeline ADC architecture with output error correction logic to guarantee 14-bit accuracy and no missing codes across −40°C to +85°C. Its patented sample-and-hold supports full performance up to 200 MHz input frequency and 700 MHz analog input bandwidth.
It features a programmable integer 1-to-8 clock divider, optional duty cycle stabilizer (DCS), and configurable data output formats (offset binary, gray code, twos complement). Digital outputs are CMOS-compatible with selectable 1.8 V or 3.3 V DRVDD, and include dedicated DCOA/DCOB clocks per channel for timing-critical latch alignment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - guarantees monotonicity and no missing codes over full temperature range |
| Sample Rate | 20 MSPS - fixed maximum conversion rate for this variant; enables low-power operation in handheld instruments |
| SNR @ 9.7 MHz | 74.3 dBFS - defines dynamic range for narrowband RF signal capture in GSM/EDGE receivers |
| Differential Nonlinearity | ±0.45 LSB (typ) - ensures accurate amplitude fidelity in medical imaging and radar baseband digitization |
| Analog Input Bandwidth | 700 MHz - supports direct sampling of IF signals up to 200 MHz without external amplification |
| Power Consumption | 33 mW per channel - enables dual-channel digitization in battery-powered scope meters with thermal headroom |
| Supply Voltages | AVDD = 1.8 V, DRVDD = 1.8 V to 3.3 V - decouples analog noise sensitivity from digital interface voltage level |
Pinout & Package
The AD9251BCPZRL7-20 is housed in a 64-lead RoHS-compliant LFCSP (CP-64-17) with exposed paddle soldered to AGND for thermal and noise integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK+, CLK− | Differential clock input | Accepts CMOS/LVDS/LVPECL; drives internal pipeline timing with 0.1 ps rms aperture jitter |
| VIN+A, VIN−A / VIN+B, VIN−B | Differential analog inputs (Ch A/B) | 700 MHz bandwidth; 2 Vp-p full-scale; common-mode set by VCM pin |
| D0A–D13A, D0B–D13B | Parallel CMOS digital outputs | 14-bit data per channel; MSB-first; output voltage levels set by DRVDD (1.8 V or 3.3 V) |
| DCOA, DCOB | Data clock outputs | Source-synchronous clocks aligned to respective channel data for reliable FPGA/CPLD capture |
| PDWN, OEB, CSB, SCLK/DFS, SDIO/DCS | Control and SPI interface | Enable power-down, output tristate, serial configuration, and format selection without external logic |
| VREF, SENSE, RBIAS, VCM | Reference and bias control | Support internal 1.0 V reference or external reference; set input common-mode and analog bias current |
Key Features
| Feature | Design Value |
|---|---|
| Single 1.8 V analog supply | Reduces system power delivery complexity and eliminates analog rail sequencing in portable designs |
| On-chip voltage reference & sample-and-hold | Eliminates need for external reference IC and high-speed op-amp buffer in space-constrained layouts |
| Programmable clock divider (1–8) | Allows flexible master clock sourcing (e.g., 40 MHz crystal → 20 MSPS) without external dividers |
| Built-in test pattern generation | Enables production-line ADC validation using deterministic or pseudorandom patterns via SPI |
| Energy-saving power-down modes | Reduces total power to 2.2 mW during idle periods-critical for battery life in handheld scopes |
Applications
| Communications Receiver | Portable Ultrasound Imaging |
|---|---|
Use Scenario: Dual-channel I/Q digitization in LTE/W-CDMA base station diversity receivers with 20 MSPS IF sampling. IC Role / Device Role / Timing Role: Simultaneous sampling of in-phase and quadrature analog IF signals; provides synchronized 14-bit data streams with <0.1 ps jitter. Use Value: Enables high-fidelity channel estimation and MIMO processing without external clock distribution or gain matching circuitry. | Use Scenario: Beamforming front-end in handheld ultrasound devices requiring low-power, high-SNR digitization of echo return signals. IC Role / Device Role / Timing Role: Digitizes amplified analog echoes from transducer arrays with 74.3 dBFS SNR at 9.7 MHz and 700 MHz input bandwidth. Use Value: Supports real-time B-mode image reconstruction with minimal quantization noise, extending battery runtime via 33 mW/channel operation. |
| Handheld Oscilloscope | Radar/LIDAR Signal Acquisition |
Use Scenario: Dual-channel acquisition subsystem in battery-powered 100-MHz bandwidth oscilloscopes with 20 MSPS deep memory capture. IC Role / Device Role / Timing Role: High-fidelity analog waveform digitization with built-in offset binary output and DCO-aligned timing for FPGA-based trigger and display engine. Use Value: Eliminates external level-shifting and clock retiming, reducing PCB area and EMI while maintaining ±0.45 LSB DNL linearity. | Use Scenario: Baseband digitization of pulsed radar returns in compact automotive LIDAR modules operating at 200 MHz input frequency. IC Role / Device Role / Timing Role: Captures wideband chirp echoes with 71.5 dBFS SNR at 200 MHz and 80 dBc SFDR, leveraging on-chip DCS for robust clock tolerance. Use Value: Delivers sufficient ENOB (11.3 bits) for precise time-of-flight calculation without requiring external anti-alias filtering or clock conditioning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, 14-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9251BCPZRL7-40 | Higher 40 MSPS sample rate; identical 64-lead LFCSP package and pinout | Required for wider IF bandwidths (>20 MHz) in W-CDMA or TD-SCDMA receivers | Select when system clock budget allows higher throughput and SNR degradation at >40 MSPS is acceptable |
| AD9258BCPZ-20 | 14-bit, 20 MSPS, but with 1.25 V AVDD and different SPI register map; same LFCSP-64 footprint | Optimized for ultra-low power (<25 mW/channel); lacks DCS and clock divider features | Choose only if lowest possible power dominates over feature flexibility and clock robustness requirements |
Compared with AD9251BCPZRL7-40 and AD9258BCPZ-20, the AD9251BCPZRL7-20 uniquely balances low power (33 mW/channel), integrated clock management (DCS + divider), and production-ready test features-making it optimal for cost-sensitive, battery-operated instrumentation where 20 MSPS suffices.
Availability
AD9251BCPZRL7-20 is available at Aetrix Electronics and suitable for communications receivers, portable ultrasound systems, and handheld oscilloscopes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD9251BCPZRL7-20 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 AD9251 product line delivers dual-channel, high-SNR, low-power ADCs designed specifically for communications infrastructure, portable medical imaging, and test equipment where precision, power efficiency, and integration reduce system complexity.
FAQ
What is the maximum analog input frequency supported by the AD9251BCPZRL7-20?
The AD9251BCPZRL7-20 supports analog input frequencies up to 200 MHz while maintaining specified AC performance, including 71.5 dBFS SNR and 80 dBc SFDR. This is enabled by its 700 MHz analog input bandwidth and patented sample-and-hold circuit, making it suitable for direct IF sampling in LTE and radar applications. The AD9251BCPZRL7-20 achieves this performance without external buffering or gain stages.
Does the AD9251BCPZRL7-20 require an external voltage reference?
No, the AD9251BCPZRL7-20 includes a precision on-chip 1.0 V voltage reference with ±12 mV total error over temperature and load, eliminating the need for external reference components in most applications. It also supports external reference via the VREF pin, with SENSE pin selecting internal or external mode. The AD9251BCPZRL7-20's internal reference is factory-trimmed and stable across −40°C to +85°C.
How does the duty cycle stabilizer (DCS) function in the AD9251BCPZRL7-20?
The AD9251BCPZRL7-20's optional duty cycle stabilizer (DCS) corrects wide variations in input clock duty cycle-up to 30% to 70%-while preserving <0.1 ps rms aperture jitter and full AC performance. DCS is enabled via the SDIO/DCS pin in non-SPI mode and requires no configuration registers. This feature allows relaxed clock source requirements in battery-powered instruments where oscillator stability may vary with temperature or voltage.
What digital output formats does the AD9251BCPZRL7-20 support?
The AD9251BCPZRL7-20 supports three programmable digital output formats: offset binary, gray code, and twos complement-all selectable via SPI register or static pin control (SCLK/DFS). Output data is parallel CMOS, 14-bit per channel, with MSB-first ordering. The AD9251BCPZRL7-20 delivers each format with identical timing and drive strength, ensuring compatibility with FPGA, ASIC, or DSP interfaces across diverse system architectures.
Is the AD9251BCPZRL7-20 pin-compatible with other members of the AD92xx family?
Yes, the AD9251BCPZRL7-20 is pin-compatible with the AD9268 (16-bit), AD9258 (14-bit), AD9231 (12-bit), and AD9204 (10-bit) in the same 64-lead LFCSP package. This enables hardware reuse and migration paths across resolution and speed grades-from 10-bit/20 MSPS to 16-bit/125 MSPS-without PCB redesign. The AD9251BCPZRL7-20 shares identical pin functions, power domains, and layout constraints with these variants.
AD9251BCPZRL7-20 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 20M
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 1.7V ~ 1.9V
- Voltage - Supply, Digital:
- 1.7V ~ 3.6V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 64-LFCSP-VQ (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD9251BCPZRL7-20 FAQ
1.How can I place an order for AD9251BCPZRL7-20 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9251BCPZRL7-20 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 AD9251BCPZRL7-20 reliable?
The price and inventory of AD9251BCPZRL7-20 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9251BCPZRL7-20 is usually 5 days.
3.What payment methods are accepted for AD9251BCPZRL7-20?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9251BCPZRL7-20 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9251BCPZRL7-20?
AD9251BCPZRL7-20 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9251BCPZRL7-20 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 AD9251BCPZRL7-20?
For technical support, including AD9251BCPZRL7-20 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9251BCPZRL7-20 requirements.
6.How does Aetrix verify that AD9251BCPZRL7-20 is sourced from the original manufacturer or authorized distributors?
All AD9251BCPZRL7-20 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 AD9251BCPZRL7-20 meets industry standards.
7.What is the process for return or replacement of AD9251BCPZRL7-20?
All AD9251BCPZRL7-20 units undergo pre-shipment inspection (PSI). If there is an issue with AD9251BCPZRL7-20, 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 AD9251BCPZRL7-20 part is unused and in its original packaging.
Return procedure for AD9251BCPZRL7-20:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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