Analog Devices Inc. AD9283BRS-80

Overview

AD9283BRS-80 from Analog Devices is an 8-bit, 80 MSPS monolithic analog-to-digital converter with on-chip track-and-hold, single 3.0 V supply operation, 475 MHz analog bandwidth, and TTL/CMOS-compatible digital outputs. It delivers 46.5 dB SNR at 41 MHz input frequency and supports battery-powered digital oscilloscopes and hand-held scopemeters.

For engineers reviewing the AD9283BRS-80 datasheet, AD9283BRS-80 pinout, AD9283BRS-80 application, or AD9283BRS-80 equivalent, key selection criteria include sampling rate (80 MSPS), power dissipation (90 mW typical), reference integration (1.25 V internal), analog input range (±512 mV p-p), and SSOP-20 package compatibility for space-constrained embedded signal acquisition systems.

Technical Context

The AD9283BRS-80 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 enables stable sampling up to 475 MHz analog bandwidth without external support circuitry.

It uses a single 3.0 V analog supply (VD) and separate digital output supply (VDD, 2.5–3.6 V), with ENCODE clock sampled on rising edge and four-pipeline-stage latency. Power-down mode reduces consumption to 4.2 mW and places digital outputs in high-impedance state.

Key Specifications

Pinout & Package

AD9283BRS-80 is housed in a 20-lead shrink small outline plastic package (SSOP, RS-20), specified for industrial temperature range (–40°C to +85°C), with 0.65 mm lead pitch and 7.50 mm × 5.38 mm body dimensions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9283BRS-80, AD9280ARSZ-80 trades integrated reference convenience for marginally better DC accuracy, while MAX1186EEE+ sacrifices 3 V operation and power efficiency to maintain pin-compatible legacy compatibility-neither offers drop-in replacement without schematic or layout revision.

Availability

AD9283BRS-80 is available at Aetrix Electronics and suitable for battery-powered instruments, hand-held scopemeters, and low-cost digital oscilloscopes requiring stable component supply, long-term lifecycle assurance, and industrial temperature grade performance.

Supply support for AD9283BRS-80 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 centers worldwide and ISO 9001-certified manufacturing.

The AD9283 product line targets cost-sensitive, portable instrumentation applications demanding low power, small footprint, and minimal external components-enabling rapid deployment of high-fidelity signal acquisition subsystems.

FAQ

What is the maximum analog input frequency supported by the AD9283BRS-80 before aliasing occurs?

The AD9283BRS-80 has a maximum sampling rate of 80 MSPS, so its Nyquist frequency is 40 MHz. Signals above 40 MHz will alias into the baseband unless filtered by an anti-aliasing filter. Its 475 MHz analog bandwidth ensures minimal amplitude roll-off up to 40 MHz, preserving signal integrity for accurate reconstruction.

Does the AD9283BRS-80 require an external reference voltage, or can it operate using its internal reference?

The AD9283BRS-80 can operate using its internal 1.25 V reference by connecting Pin 2 (VREF OUT) to Pin 3 (VREF IN). No external reference is required for basic operation. The internal reference is specified over temperature (±130 ppm/°C) and supports ±5% adjustment for gain calibration without performance loss.

How does the power-down mode affect the digital outputs of the AD9283BRS-80?

In power-down mode (PWRDWN = HIGH), the AD9283BRS-80 reduces total power dissipation to 4.2 mW and drives all digital outputs (D7–D0) into a high-impedance state. This prevents bus contention and eliminates switching current draw, making it ideal for intermittent acquisition in battery-operated devices.

What is the recommended termination for the analog inputs of the AD9283BRS-80 in single-ended configuration?

For single-ended operation, Analog Devices recommends terminating the unused AIN pin with a 0.1 µF capacitor and a 25 Ω resistor in series to ground. This provides optimal input matching and minimizes reflections, especially critical at high input frequencies where mismatch degrades SNR and harmonic distortion performance.

Can the AD9283BRS-80 interface directly with a 2.5 V FPGA I/O bank without level shifting?

Yes-the AD9283BRS-80 features a dedicated VDD pin (Pin 15) that accepts 2.5 V to 3.6 V, allowing its TTL/CMOS-compatible digital outputs (D7–D0) to drive 2.5 V logic directly. This eliminates external level shifters and simplifies interconnect in FPGA-based data acquisition systems.