Analog Devices Inc. AD9283BRSZ-50

Overview

AD9283BRSZ-50 from Analog Devices is an 8-bit, 50 MSPS monolithic analog-to-digital converter with on-chip track-and-hold, internal 1.25 V reference, and single 3.0 V supply operation (2.7–3.6 V). It delivers 46.5 dB SNR at 41 MHz input frequency, supports 1 V_p-p analog input range, and features TTL/CMOS-compatible digital outputs powered by a separate VDD pin for 2.5 V/3.3 V logic interfacing - used in handheld scopemeters and battery-powered instrumentation.

For engineers reviewing the AD9283BRSZ-50 datasheet, AD9283BRSZ-50 pinout, AD9283BRSZ-50 application, or AD9283BRSZ-50 equivalent, key selection considerations include its 50 MSPS sample rate, SSOP-20 package, power-down mode (4.2 mW), 475 MHz analog bandwidth, and offset binary output coding - all verified per Analog Devices REV. C datasheet.

Technical Context

The AD9283BRSZ-50 implements a bit-per-stage pipeline ADC architecture with switch-capacitor techniques, where five stages resolve the 5 MSBs and a flash converter encodes the 3 LSBs. Its on-chip track-and-hold operates with 5 ps rms aperture jitter and 0 ns aperture delay, enabling accurate sampling of high-frequency signals up to 475 MHz full-power bandwidth.

It uses a fully differential analog input structure with internal biasing at 0.3 × VD and supports both single-ended and differential modes. The ENCODE input is TTL/CMOS-compatible (1.5 V threshold), and digital outputs are latched with four-pipeline latency, tPD = 4.5–7.0 ns and tV = 2.0–3.0 ns, referenced to the rising edge of ENCODE.

Key Specifications

Pinout & Package

AD9283BRSZ-50 is housed in a 20-lead shrink small-outline plastic package (SSOP, RS-20), 7.64 mm × 5.38 mm footprint, 0.65 mm pitch, specified for –40°C to +85°C industrial operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit, medium-speed ADC applications.

Compared with AD9283BRSZ-50, AD9280ARSZ trades sample rate and integration for lower power and simpler timing, while MAX1186EEE+ sacrifices parallel output convenience for smaller footprint and programmable features - neither offers identical 50 MSPS + internal 1.25 V reference + SSOP-20 combination.

Availability

AD9283BRSZ-50 is available at Aetrix Electronics and suitable for battery-powered instruments, handheld scopemeters, and low-cost digital oscilloscopes requiring stable component supply, long-term industrial temperature support, and consistent SSOP-20 packaging.

Supply support for AD9283BRSZ-50 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 design and manufacturing expertise spanning precision converters, amplifiers, and RF solutions.

The AD9283 belongs to Analog Devices' low-power, high-speed ADC product line, engineered specifically for portable test equipment and cost-sensitive instrumentation where integration, power efficiency, and ease of use are primary design drivers.

FAQ

What is the maximum analog input frequency supported by the AD9283BRSZ-50?

The AD9283BRSZ-50 has a full-power analog bandwidth of 475 MHz, meaning it can accurately digitize signals with frequency content up to that limit before significant amplitude roll-off occurs. However, its 50 MSPS sample rate imposes a 25 MHz Nyquist limit for unaliased baseband sampling - so while high-frequency transients are captured, full reconstruction requires undersampling or bandpass sampling techniques validated per the datasheet's TPC 9 frequency response plot.

Does the AD9283BRSZ-50 require an external reference voltage?

No, the AD9283BRSZ-50 includes an internal 1.25 V reference (VREF OUT, Pin 2) that can be directly connected to VREF IN (Pin 3) to enable self-contained operation. External references are optional and only needed when adjusting full-scale range beyond ±5% of nominal - the internal reference is specified with ±130 ppm/°C tempco and requires a 0.1 µF bypass capacitor to ground per Pin 2.

How does the power-down mode affect the digital outputs of the AD9283BRSZ-50?

When PWRDWN (Pin 1) is asserted HIGH, the AD9283BRSZ-50 enters power-down mode consuming just 4.2 mW, and all eight digital outputs (D7–D0) transition to a high-impedance (Hi-Z) state within two clock cycles. This prevents bus contention in multi-ADC systems and eliminates switching current draw from the output buffers - recovery to full operation takes approximately 15 encode cycles after PWRDWN is deasserted LOW.

What logic family compatibility does the AD9283BRSZ-50 support for its digital interface?

The AD9283BRSZ-50 supports TTL/CMOS-compatible logic levels on both inputs and outputs: ENCODE accepts 0.8 V / 2.0 V thresholds, and digital outputs swing from 0.05 V (logic 0) to 2.95 V (logic 1) when VDD = 3.0 V. Critically, the VDD pin (Pin 15) is separate from analog VD, allowing direct interfacing with 2.5 V or 3.3 V logic families without level shifters - confirmed by output voltage specs across full industrial temperature range.

Is the AD9283BRSZ-50 pin-compatible with other members of the AD9283 family?

Yes, all AD9283 variants - including AD9283BRSZ-50, AD9283BRSZ-80, and AD9283BRSZ-100 - share identical 20-lead SSOP (RS-20) packaging and pinout. The only differences are guaranteed maximum sample rates (50/80/100 MSPS) and corresponding dynamic performance specifications (e.g., SNR degrades slightly at higher speeds); electrical and mechanical interfaces remain fully interchangeable in PCB layout.