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Analog Devices Inc. AD9258BCPZ-125
- Part No.:
- AD9258BCPZ-125
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD9258BCPZ-125.pdf
- Description:
- IC ADC 14BIT PIPELINED 64LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,283
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Product details
Overview
AD9258BCPZ-125 from Analog Devices is a dual, 14-bit, 125 MSPS analog-to-digital converter designed for high-performance communications receivers. It features differential analog inputs with 650 MHz bandwidth, 77.6 dBFS SNR at 70 MHz, 88 dBc SFDR at 70 MHz, and operates from a single 1.8 V analog supply. It supports I/Q demodulation in LTE and W-CDMA baseband receivers.
For engineers reviewing the AD9258BCPZ-125 datasheet, AD9258BCPZ-125 pinout, AD9258BCPZ-125 application, or AD9258BCPZ-125 equivalent, key selection criteria include sampling rate headroom for IF digitization up to 300 MHz, channel isolation of 95 dB, on-chip dither for SFDR enhancement, and flexible 1.8 V CMOS/LVDS output interface compatibility.
Technical Context
The AD9258BCPZ-125 employs a multistage differential pipelined ADC architecture with integrated error correction logic per channel. Its duty cycle stabilizer compensates for clock asymmetry, enabling stable performance without external clock conditioning.
It supports integer 1-to-8 input clock division and provides two independent 14-bit parallel data paths with programmable output format (offset binary, two's complement, gray code). Synchronization across multiple devices is enabled via the SYNC pin and multichip sync logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete amplitude levels for high-fidelity signal capture in wideband receivers. |
| Max Sampling Rate | 125 MSPS - supports Nyquist-sampled IF signals up to 62.5 MHz or undersampled RF signals up to 300 MHz. |
| SNR @ 70 MHz | 77.6 dBFS - enables detection of low-level signals in dense spectral environments such as cellular base stations. |
| SFDR @ 70 MHz | 88 dBc - suppresses spurious tones critical for adjacent-channel interference rejection in LTE/W-CDMA. |
| Analog Input Bandwidth | 650 MHz - preserves signal integrity for wideband IF sampling without external anti-alias filtering. |
| Power Consumption | 750 mW @ 125 MSPS - balances performance and thermal management in compact, multi-ADC systems. |
| Channel Isolation | 95 dB - minimizes crosstalk between I/Q channels, essential for accurate quadrature demodulation. |
| Digital Output Interface | 1.8 V CMOS or LVDS - allows direct interfacing with FPGA I/O banks or ASIC serializers without level-shifting. |
Pinout & Package
The AD9258BCPZ-125 is housed in a 64-lead LFCSP (Lead Frame Chip Scale Package) with exposed thermal pad, specified for −40°C to +85°C industrial operation. The package requires soldering of the exposed pad to PCB ground for proper thermal dissipation and analog reference stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK+, CLK− | Differential clock input | Accepts CMOS/LVDS/LVPECL clocks; internal bias sets common-mode at 0.9 V for robust timing margin. |
| VIN+A, VIN−A / VIN+B, VIN−B | Differential analog inputs (Ch A/B) | 650 MHz bandwidth; support 1–2 Vp-p input range; require matched 50 Ω termination for optimal SFDR. |
| D0A–D13A, D0B–D13B | Parallel digital outputs | 14-bit per channel; configurable as 1.8 V CMOS or LVDS; LSB-aligned, MSB-marked for deterministic FPGA capture. |
| DCOA, DCOB | Data clock outputs | Source-synchronous strobes aligned to data edges; enable precise timing capture in FPGA input registers. |
| SYNC | Multi-device synchronization | Enables deterministic phase alignment across multiple AD9258 units for coherent array processing. |
| PDWN, OEB | Power-down & output enable | Hardware-controlled low-latency power gating (0.5 mW standby) and output tri-state for shared bus architectures. |
| CSB, SCLK/DFS, SDIO/DCS | SPI serial interface | 3-wire configuration port supporting register read/write, dither enable, reference mode, and BIST control. |
| VREF, SENSE, RBIAS | Reference subsystem | Supports internal 1.0 V reference (±12 mV error) or external reference; SENSE selects mode; RBIAS sets bias current. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip dither | Improves SFDR by >15 dB at −23 dBFS input when enabled, mitigating harmonic distortion from low-amplitude signals. |
| Proprietary differential input | Maintains 77.6 dBFS SNR up to 70 MHz and 75.1 dBFS at 200 MHz, enabling direct IF sampling without transformer-based front-ends. |
| Duty cycle stabilizer (DCS) | Compensates for ±25% clock duty cycle variation, eliminating need for external clock conditioners in FPGA-driven systems. |
| Built-in self-test (BIST) | Generates known ramp/square wave patterns internally, allowing production test and field diagnostics without external stimulus. |
| Pin compatibility | Shares identical 64-lead LFCSP footprint and signal mapping with AD9251, AD9231, AD9204, and AD9268-enabling scalable design reuse. |
| Flexible power modes | Three states: full operation (750 mW), standby (45 mW), and power-down (0.5 mW), supporting dynamic power scaling in battery-aware systems. |
Applications
| Communications Base Station Receiver | Ultrasound Beamforming System |
|---|---|
Use Scenario: Digitizing dual-channel IF signals from quadrature downconverters in LTE macrocell base stations operating at 180–220 MHz IF. IC Role / Device Role / Timing Role: Dual-channel ADC capturing synchronized I/Q data at 125 MSPS with 95 dB inter-channel isolation to preserve phase coherence. Use Value: Enables real-time digital predistortion and MIMO processing with <1 ps channel skew, reducing FPGA resource overhead for deskew logic. | Use Scenario: High-speed acquisition of echo return signals from 128-element transducer arrays in portable ultrasound machines. IC Role / Device Role / Timing Role: Simultaneous sampling of two receive channels per chip, supporting 15 MHz bandwidth imaging with 14-bit dynamic range. Use Value: Delivers 77.6 dBFS SNR at 70 MHz input, improving contrast resolution for tissue differentiation without analog gain staging. |
| Software-Defined Radio (SDR) Front-End | Defense Radar Digital Receiver |
Use Scenario: Wideband spectrum sensing across 20–500 MHz using undersampling in cognitive radio platforms with FPGA-based DSP. IC Role / Device Role / Timing Role: Dual ADC providing 125 MSPS sampling with 650 MHz analog input bandwidth and programmable clock divider for flexible tuning. Use Value: Eliminates need for multiple narrowband ADCs; on-chip dither ensures clean SFDR across instantaneous bandwidths up to 125 MHz. | Use Scenario: Digitizing pulsed Doppler radar returns in electronic warfare systems requiring high spurious-free dynamic range. IC Role / Device Role / Timing Role: High-isolation dual ADC capturing time-aligned I/Q samples for pulse compression and Doppler FFT analysis. Use Value: 88 dBc SFDR at 70 MHz and −83 dBc worst harmonic enable detection of weak targets masked by strong clutter. |
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 |
|---|---|---|---|
| AD9258BCPZ-105 | Lower maximum sample rate (105 MSPS vs. 125 MSPS); identical pinout, AC specs scaled accordingly. | Suitable for cost-sensitive designs where 105 MSPS meets IF bandwidth requirements (e.g., GSM/EDGE). | Select AD9258BCPZ-105 when system clocking constraints or thermal budget preclude 125 MSPS operation. |
| AD9268BCPZ-125 | 16-bit resolution (vs. 14-bit), same 125 MSPS rate, pin-compatible LFCSP package, higher power (1.25 W). | Used in applications demanding higher ENOB (>12 bits) at high input frequencies, e.g., precision instrumentation or radar calibration. | Choose AD9268BCPZ-125 when additional 2-bit resolution justifies increased power and FPGA data path width. |
Compared with AD9258BCPZ-105 and AD9268BCPZ-125, the AD9258BCPZ-125 uniquely balances 14-bit fidelity, 125 MSPS throughput, and 750 mW power in a pin-compatible footprint-making it optimal for LTE/W-CDMA infrastructure where SNR/SFDR trade-offs favor mid-resolution speed.
Availability
AD9258BCPZ-125 is available at Aetrix Electronics and suitable for communications infrastructure, medical ultrasound, and defense radar applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for AD9258BCPZ-125 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 AD9258 belongs to Analog Devices' high-speed ADC product line, engineered for communications and instrumentation systems demanding wide bandwidth, low noise, and deterministic timing in compact form factors.
FAQ
What is the maximum analog input frequency supported by the AD9258BCPZ-125?
The AD9258BCPZ-125 supports analog input frequencies up to 300 MHz via undersampling, enabled by its 650 MHz analog input bandwidth and 125 MSPS sampling rate. At 70 MHz input, it achieves 77.6 dBFS SNR and 88 dBc SFDR-key metrics validated in the datasheet for communications IF sampling. Performance degrades gradually beyond 200 MHz, with 75.1 dBFS SNR measured at 200 MHz.
Does the AD9258BCPZ-125 support both CMOS and LVDS digital outputs?
Yes, the AD9258BCPZ-125 supports configurable 1.8 V CMOS or LVDS parallel outputs via the DRVDD supply and SPI register settings. In CMOS mode, outputs drive 1.8 V logic with 1.75 V high-level voltage at 0.5 mA load; in LVDS mode, differential output voltage is 290–400 mV (ANSI) with 1.15–1.35 V offset. Both modes maintain identical 12-cycle pipeline latency.
How does the on-chip dither function improve SFDR in the AD9258BCPZ-125?
The AD9258BCPZ-125's optional on-chip dither injects controlled noise into the ADC core to randomize quantization distortion, raising SFDR by up to 15 dB at −23 dBFS input. At 70 MHz, SFDR improves from 89 dBFS (no dither) to 106 dBFS (with dither), directly enhancing spurious tone suppression in low-level signal detection scenarios.
What is the purpose of the SYNC pin on the AD9258BCPZ-125?
The SYNC pin on the AD9258BCPZ-125 enables deterministic multi-chip synchronization for coherent sampling across multiple ADCs. When asserted synchronously with the ADC clock, it resets internal pipeline stages and aligns sample timing across devices-critical for phased-array radar, MIMO base stations, and beamforming systems requiring sub-picosecond channel alignment.
Can the AD9258BCPZ-125 operate with an external voltage reference?
Yes, the AD9258BCPZ-125 supports both internal (1.0 V ±12 mV) and external voltage references. The SENSE pin selects mode: grounded for internal reference, open or pulled high for external. VREF pin serves as input/output; when external reference is used, it must be low-noise, ≤1.25 V, and capable of sinking 100 µA bias current per the datasheet's RBIAS specification.
AD9258BCPZ-125 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):
- 125M
- 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:
- External, 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:
- -
AD9258BCPZ-125 FAQ
1.How can I place an order for AD9258BCPZ-125 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9258BCPZ-125 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 AD9258BCPZ-125 reliable?
The price and inventory of AD9258BCPZ-125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9258BCPZ-125 is usually 5 days.
3.What payment methods are accepted for AD9258BCPZ-125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9258BCPZ-125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9258BCPZ-125?
AD9258BCPZ-125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9258BCPZ-125 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 AD9258BCPZ-125?
For technical support, including AD9258BCPZ-125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9258BCPZ-125 requirements.
6.How does Aetrix verify that AD9258BCPZ-125 is sourced from the original manufacturer or authorized distributors?
All AD9258BCPZ-125 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 AD9258BCPZ-125 meets industry standards.
7.What is the process for return or replacement of AD9258BCPZ-125?
All AD9258BCPZ-125 units undergo pre-shipment inspection (PSI). If there is an issue with AD9258BCPZ-125, 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 AD9258BCPZ-125 part is unused and in its original packaging.
Return procedure for AD9258BCPZ-125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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