AD9253BCPZ-105

Overview

The AD9253BCPZ-105 is a quad, 14-bit analog-to-digital converter (ADC) from Analog Devices Inc., operating at a maximum conversion rate of 105 MSPS. It features an on-chip sample-and-hold circuit and requires a single 1.8 V power supply with LVPECL/CMOS/LVDS-compatible clock inputs. The device provides serial LVDS outputs, supports individual channel power-down, and includes programmable output clocks and data alignment via SPI control. Packaged in a RoHS-compliant 48-lead LFCSP, it operates within an industrial temperature range of −40°C to +85°C.

Feature Summary

• Quad-channel architecture with integrated sample-and-hold circuitry for high-density applications.
• Supports flexible bit orientation, programmable output resolution, and digital test pattern generation.
• Enables low-power operation through full chip or individual channel power-down modes.
• Includes built-in common-mode voltage reference and eliminates the need for external driver components.

Applications

• Medical ultrasound imaging systems
• High-speed data acquisition and imaging equipment
• Quadrature and diversity radio receivers
• General-purpose test and measurement instrumentation

Procurement Notes

Verify the specific suffix 'BCPZ-105' against the manufacturer's current ordering guide to confirm availability and exact performance grade. Ensure that the procurement documentation matches the required 105 MSPS speed bin, as this variant differs from the standard 80 MSPS or 125 MSPS versions. Confirm package compliance and temperature ratings prior to finalizing orders.

Selection Notes

Select the AD9253BCPZ-105 when a balance between moderate sampling speed and high resolution is required. This model is suitable for systems where 105 MSPS meets bandwidth needs while maintaining 14-bit accuracy. Consider the pin compatibility with the AD9633 if upgrading from 12-bit solutions. Evaluate power consumption requirements, noting that per-channel power scales with the selected sampling rate.

Part Context

The AD9253 series comprises three speed variants: 80 MSPS, 105 MSPS, and 125 MSPS. The AD9253BCPZ-105 specifically denotes the 105 MSPS performance bin within the 14-bit quad ADC family. All variants share identical pinouts, packaging, and functional blocks, differing primarily in their maximum specified conversion rates and associated AC performance metrics.

Replacement Considerations

The AD9633 is a pin-compatible 12-bit quad ADC alternative. For direct replacement within the same family, consider the AD9253BCPZ-80 or AD9253BCPZ-125 depending on whether lower or higher sampling speeds are acceptable for the application design.

FAQ

Does the AD9253 require an external voltage reference?

No, the AD9253 includes an internal voltage reference. However, an external reference can be used by connecting it to the VREF pin if higher precision is required.

What is the typical power consumption per channel at 105 MSPS?

The datasheet specifies a typical power consumption of 110 mW per channel at 125 MSPS. Power consumption scales with the sampling rate, so the 105 MSPS variant will consume slightly less than this value.

How is the analog input common-mode voltage established?

The device features an on-chip common-mode voltage reference available at the VCM pin. This pin should be decoupled to ground with a 0.1 µF capacitor to set the optimal common-mode level for differential inputs.