Analog Devices Inc. AD9231BCPZ-65

Overview

AD9231BCPZ-65 from Analog Devices is a dual-channel, 12-bit, 65 MSPS analog-to-digital converter operating from a single 1.8 V analog supply with separate 1.8 V–3.3 V digital output drivers. It delivers 71.3 dBFS SNR at 9.7 MHz input and 69.0 dBFS at 200 MHz, supports differential 700 MHz analog input bandwidth, and features on-chip voltage reference and sample-and-hold circuitry. It is used in I/Q demodulation systems for LTE and W-CDMA receivers.

For engineers reviewing the AD9231BCPZ-65 datasheet, AD9231BCPZ-65 pinout, AD9231BCPZ-65 application, or AD9231BCPZ-65 equivalent, key selection criteria include its 65 MSPS sampling rate, 12-bit resolution with guaranteed no missing codes, dual-channel interleaving capability, and LFCSP-64 package compatibility with AD9258/AD9251/AD9204 family members.

Technical Context

The AD9231BCPZ-65 implements a multistage differential pipeline ADC architecture with output error correction logic to ensure 12-bit accuracy and monotonicity across −40°C to +85°C. Its patented sample-and-hold circuit maintains performance up to 200 MHz input frequency while enabling low-power operation (71 mW per channel at 65 MSPS).

Dual independent channels share a common differential clock input (CLK+/CLK−) supporting CMOS/LVDS/LVPECL levels, with optional duty cycle stabilizer (DCS) and integer 1-to-8 clock divider. Digital outputs are configurable in offset binary, gray code, or twos complement format, with programmable DCO/data alignment and multiplexed bus support.

Key Specifications

Pinout & Package

The AD9231BCPZ-65 is housed in a 64-lead RoHS-compliant LFCSP (9 mm × 9 mm) with exposed paddle soldered to AGND for thermal and noise performance. Pin 0 is the exposed paddle (GND), and all AVDD pins (49,50,53,54,59,60,63,64) must be decoupled locally.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, 12-bit ADC applications.

Compared with AD9231BCPZ-65, AD9258BCPZ-65 offers 2 extra bits of resolution at identical speed and pinout, while AD9204BCPZ-80 trades 2 bits for 15 MSPS higher sampling-enabling trade-offs between precision, bandwidth, and FPGA resource usage in receiver design.

Availability

AD9231BCPZ-65 is available at Aetrix Electronics and suitable for communications infrastructure, portable medical imaging, and handheld test equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for AD9231BCPZ-65 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, with R&D and manufacturing operations worldwide.

The AD9231 product line delivers high-speed, low-power, dual-channel ADCs optimized for communications, instrumentation, and medical imaging-designed to replace discrete ADC solutions with integrated reference, clocking, and digital interface functions.

FAQ

What is the maximum analog input frequency supported by the AD9231BCPZ-65?

The AD9231BCPZ-65 supports analog input frequencies up to 200 MHz while maintaining specified AC performance (69.0 dBFS SNR). Its 700 MHz small-signal analog input bandwidth enables sampling of signals in the second and third Nyquist zones, making it suitable for IF sampling in wireless receivers. This bandwidth is measured differentially across VIN+A/VIN−A and VIN+B/VIN−B pairs.

Does the AD9231BCPZ-65 require an external voltage reference?

No, the AD9231BCPZ-65 includes an on-chip 1.0 V voltage reference with ±1.5% tolerance and 2 mV load regulation error. It can operate in internal reference mode (default) or accept an external reference via the VREF pin. The internal reference eliminates BOM cost and layout complexity while delivering 71.3 dBFS SNR at 9.7 MHz input, as verified in the AD9231 Rev. C datasheet Figure 18.

How does the power consumption of the AD9231BCPZ-65 compare across sample rates?

At 65 MSPS, the AD9231BCPZ-65 consumes 71 mW per channel (142 mW total) with DRVDD = 1.8 V. Power scales approximately linearly: 32 mW/channel at 20 MSPS and 71 mW/channel at 65 MSPS. Standby mode draws 37 mW, and power-down mode reduces consumption to 2.2 mW. These values are measured under full-scale sine-wave input conditions per Table 1 in the AD9231 Rev. C datasheet.

Is the AD9231BCPZ-65 pin-compatible with other members of the AD92xx family?

Yes, the AD9231BCPZ-65 uses a 64-lead LFCSP package that is pin-compatible with the AD9268 (16-bit), AD9258 (14-bit), AD9251 (14-bit), and AD9204 (10-bit) ADCs. This enables hardware reuse and migration paths between 10-bit and 16-bit converters sampling from 20 MSPS to 125 MSPS, as explicitly stated in the AD9231 Rev. C Product Highlights section.

What digital output formats does the AD9231BCPZ-65 support?

The AD9231BCPZ-65 supports offset binary (default), gray code, and twos complement data formats. Format selection is configurable via SPI register writes or hardware pins (SCLK/DFS): DFS high selects twos complement; DFS low selects offset binary. Gray code requires SPI configuration. All formats deliver 12-bit parallel data on D0A–D11A and D0B–D11B with MSB-first ordering.