Analog Devices Inc. AD9235BRUZ-65

Overview

AD9235BRUZ-65 from Analog Devices is a 12-bit, 65 MSPS monolithic analog-to-digital converter (ADC) with integrated sample-and-hold amplifier and on-chip voltage reference. It operates from a single 3 V supply (2.7 V to 3.6 V), delivers 70 dBc SNR and 85 dBc SFDR at Nyquist, consumes 300 mW, and supports differential analog inputs up to 500 MHz bandwidth - used in ultrasound front-ends and IF sampling receivers.

For engineers reviewing the AD9235BRUZ-65 datasheet, AD9235BRUZ-65 pinout, AD9235BRUZ-65 application, or AD9235BRUZ-65 equivalent, key selection criteria include its 12-bit resolution at 65 MSPS, low-power 3 V operation, differential input flexibility (1–2 V_p-p range), clock duty cycle stabilizer (DCS), and OTR overflow flag for real-time signal integrity monitoring.

Technical Context

The AD9235BRUZ-65 employs a multistage differential pipelined architecture with output error correction logic to guarantee 12-bit accuracy and no missing codes across –40°C to +85°C. Its patented SHA supports both differential and single-ended configurations, maintaining <±0.4 LSB DNL up to 100 MHz input frequency.

It features a dedicated digital output driver supply (DRVDD = 2.25–3.6 V) for compatibility with 2.5 V or 3.3 V logic families, and includes a clock duty cycle stabilizer that preserves performance across wide duty cycle variations - critical for jitter-sensitive communications sampling.

Key Specifications

Pinout & Package

AD9235BRUZ-65 is packaged in a 28-lead TSSOP (RU-28) with exposed paddle, rated for industrial temperature range (–40°C to +85°C). Pin functions are validated per Analog Devices Rev. D datasheet Figure 3 and Table 6.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9235BRUZ-65, AD9233BCPZ-65 reduces power and size but sacrifices on-chip reference convenience, while ADS5272IPFP offers superior SNR and multi-channel sync at significantly higher power and cost - making AD9235BRUZ-65 optimal for cost-sensitive, single-channel, self-contained IF digitization.

Availability

AD9235BRUZ-65 is available at Aetrix Electronics and suitable for ultrasound equipment, IF sampling receivers, and battery-powered instruments requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature performance.

Supply support for AD9235BRUZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and healthcare markets since 1965.

The AD9235 product line delivers monolithic, low-power, high-speed ADCs optimized for portable medical imaging, wireless infrastructure, and test equipment - emphasizing integration, power efficiency, and ease of system-level design.

FAQ

What is the maximum analog input frequency supported by the AD9235BRUZ-65?

The AD9235BRUZ-65 features a 500 MHz analog input bandwidth, enabling accurate sampling of signals up to 100 MHz while maintaining specified SNR and SFDR performance. At 65 MSPS, its Nyquist frequency is 32.5 MHz; however, the wide SHA bandwidth supports undersampling applications such as IF digitization at 45–70 MHz, as confirmed in Figures 10–11 and Table 4 of the Rev. D datasheet.

Does the AD9235BRUZ-65 require an external voltage reference?

No, the AD9235BRUZ-65 includes an on-chip voltage reference configurable for 1.0 V or 0.5 V output, eliminating the need for external references in most applications. The SENSE pin selects the mode, and VREF serves as both input and output. External reference operation is supported via REFT/REFB pins if higher precision or temperature stability is required - detailed in the "Voltage Reference" section (Page 18) of the datasheet.

What is the purpose of the OTR pin on the AD9235BRUZ-65?

The OTR (Out-of-Range) pin on the AD9235BRUZ-65 is an active-high flag indicating analog input saturation beyond the selected full-scale range. When asserted, it signals overflow condition and - combined with the MSB - distinguishes between high-side and low-side clipping. This enables real-time signal integrity monitoring and automatic gain control in ultrasound and communications receivers, as described in the Functional Block Diagram (Figure 1) and Pin Function Descriptions (Table 6).

Can the AD9235BRUZ-65 operate with a 2.5 V digital interface?

Yes, the AD9235BRUZ-65 supports 2.5 V digital interfacing via its dedicated DRVDD supply pin (2.25 V to 3.6 V range), while AVDD remains at 3 V for analog circuitry. Digital outputs meet 2.5 V logic thresholds (VOH ≥ 2.45 V, VOL ≤ 0.2 V at IOL = 1.6 mA), ensuring reliable communication with 2.5 V FPGAs and microcontrollers - verified in Table 2 (Digital Specifications, Page 4) of the Rev. D datasheet.

Is the AD9235BRUZ-65 pin-compatible with other members of the AD9235 family?

Yes, the AD9235BRUZ-65 shares identical pinout and footprint with AD9235BRUZ-20 and AD9235BRUZ-40 in the same 28-lead TSSOP package (RU-28), enabling drop-in speed upgrades within the same PCB layout. This compatibility is explicitly stated in Product Highlight #4 and confirmed in Figure 3 (Pin Configuration) and Table 6 of the Rev. D datasheet.