Analog Devices Inc. AD9245BCPZ-20

Overview

AD9245BCPZ-20 from Analog Devices is a 14-bit, 20 MSPS analog-to-digital converter (ADC) with single 3 V supply operation, differential input (500 MHz bandwidth), on-chip reference and sample-and-hold, DNL = ±0.5 LSB, and SNR = 72.7 dBc to Nyquist - used in handheld scopemeters and battery-powered instrumentation requiring low power and high DC/AC accuracy.

For engineers reviewing the AD9245BCPZ-20 datasheet, AD9245BCPZ-20 pinout, AD9245BCPZ-20 application, or AD9245BCPZ-20 equivalent, key selection criteria include sampling rate tolerance at 20 MSPS, 32-lead LFCSP thermal performance, differential input configuration flexibility, and compatibility with 2.5 V/3.3 V digital logic via separate DRVDD supply.

Technical Context

The AD9245BCPZ-20 employs a multistage differential pipelined 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 amplifier supports both differential and single-ended inputs up to 100 MHz full-scale.

It features a clock duty-cycle stabilizer (DCS) for robust timing margining, out-of-range (OTR) overflow detection, and flexible data formatting (offset binary or twos complement). The ADC uses separate AVDD (analog) and DRVDD (digital driver) supplies to isolate noise-sensitive analog circuitry from digital switching transients.

Key Specifications

Pinout & Package

AD9245BCPZ-20 is housed in a 32-lead LFCSP (Lead Frame Chip Scale Package) with exposed paddle, optimized for thermal dissipation and low-inductance grounding. The package requires soldering the exposed pad to the PCB ground plane per Analog Devices' thermal guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ADC applications.

Compared with AD9245BCPZ-40, the AD9245BCPZ-20 reduces power by 75 mW and relaxes clock jitter requirements, while AD9235BCPZ-20 trades 2 bits of resolution for lower cost and smaller die size - making each variant optimal for distinct signal fidelity, thermal, and cost constraints.

Availability

AD9245BCPZ-20 is available at Aetrix Electronics and suitable for handheld test equipment, portable medical diagnostics, and battery-operated signal analyzers requiring stable component supply, long-lifecycle availability, and guaranteed industrial temperature grade performance.

Supply support for AD9245BCPZ-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 AD9245 product line delivers high-speed, high-resolution ADCs optimized for communications infrastructure, medical imaging, and portable instrumentation - emphasizing low power, integrated references, and robust AC performance across temperature.

FAQ

What is the maximum analog input frequency supported by AD9245BCPZ-20?

The AD9245BCPZ-20 supports analog input frequencies up to 100 MHz with maintained performance, as confirmed by its 500 MHz analog input bandwidth and tested SNR/SFDR specifications at 100 MHz input. This capability enables undersampling of IF signals in communications receivers without external amplification or filtering.

Does AD9245BCPZ-20 include an internal voltage reference?

Yes, AD9245BCPZ-20 integrates an internal voltage reference configurable for 0.5 V or 1.0 V output. When enabled, it provides ±35 mV output voltage error over temperature and supports differential reference inputs via REFT/REFB pins for improved gain accuracy in precision applications.

Is AD9245BCPZ-20 pin-compatible with other members of the AD9245 family?

Yes, AD9245BCPZ-20 is pin-compatible with AD9245BCPZ-40, AD9245BCPZ-65, and AD9245BCPZ-80 - all share identical 32-lead LFCSP packaging and pin functions. This allows hardware reuse across sampling rate variants during platform development and production scaling.

What digital output format options does AD9245BCPZ-20 support?

AD9245BCPZ-20 supports both offset binary and twos complement data formats, selected via the MODE pin. This flexibility simplifies integration with FPGA-based processing pipelines or DSPs requiring signed arithmetic without external format conversion logic.

How does the OTR (out-of-range) signal function in AD9245BCPZ-20?

The OTR signal in AD9245BCPZ-20 is an active-high indicator that asserts when the analog input exceeds the selected full-scale range. Used alongside the MSB, it distinguishes between high-overflow (positive saturation) and low-overflow (negative saturation), enabling robust AGC and fault-handling algorithms in real-time signal chains.