AD9280ARSZ - 8-Bit 32 MSPS CMOS ADC | Analog Devices
MPN: AD9280ARSZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.4 | $11.40 |
| 10 | $10.18 | $101.80 |
| 100 | $8.95 | $895.00 |
| 500 | $7.4 | $3,700.00 |
| 1,000 | $5.15 | $5,150.00 |
AD9280ARSZ Overview
An analog-to-digital converter (ADC) is a data-converter IC that samples a continuous analog input voltage and produces a discrete digital output code proportional to the input. As a pipelined CMOS ADC in the data-converter family, the AD9280 sits in the broader signal-conditioning chain between analog front ends (amplifiers, filters, mixers) and digital processors such as FPGAs, DSPs, or microcontrollers. Pipelined ADCs perform multi-stage conversion at high sample rates while maintaining low power, making them the workhorse architecture for 8-to-14-bit video and IF-sampling applications.
Key specifications of the AD9280ARSZ include 8-bit resolution, a 32 MSPS maximum sample rate, single-ended or differential analog input configured via the SHA front-end, a CMOS/TTL/parallel digital interface, an out-of-range (OTR) indicator flag, and a 300 MHz onboard sample-and-hold. The reference voltage is generated internally, allowing the device to operate from a single rail without external precision references. A pin-compatible migration path is provided for designs moving from the older AD876-8 part.
Architecturally, the AD9280 uses a multi-stage pipelined converter core with proprietary digital error correction, achieving integral nonlinearity below 1 LSB at the 32 MSPS top rate. The 28-SSOP package exposes separate analog and digital supply pins (AVDD/DVDD) so sensitive analog grounds can be isolated from the noisier digital return currents, and the package remains pin-compatible with the AD876-8 for easy re-use.
Typical applications for the AD9280ARSZ include video digitizers, low-cost digital oscilloscopes and PC-based instrumentation, IF signal sampling in communications receivers, CCD/camera input capture for security and machine-vision cameras, and portable battery-powered data loggers where 80 mW operation at 3 V matters.
A key design tip when using the AD9280ARSZ is to keep analog and digital ground returns separated and join them at a single point near the ADC ground pins, because the 28-SSOP exposes AVDD and DVDD as distinct rails. Decouple each pin with a 0.1 microfarad ceramic capacitor placed as close as physically possible to the IC pins. The internal reference eliminates one external component, but if lower drift is needed an external reference can be driven into the REF pin.
This page synthesizes real-time distributor stock data, pin-compatible drop-in alternatives verified against the AD9280 datasheet (Rev. E), and practical design notes not found in the manufacturer datasheet, giving engineers a one-stop reference for selecting, sourcing, and laying out the AD9280ARSZ.
Drop-in alternatives for AD9280ARSZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AD9280ARSZ (same form factor and footprint) — differing in Architecture, Differential Nonlinearity (DNL), Number of Channels, Out-of-Range Indicator, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD9280ARSZRL
✅ Drop-In✓ In Stock
$4.7584 / Unit
View Datasheet →AD9280ARS-REEL
✅ Drop-In📋 Reference alternative (not in catalog)
AD876-8ARSZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD9280ARSZ Maximum Ratings & Electrical Characteristics
| Resolution | 8 bits |
| Number of Channels | 1 input, single channel |
| Architecture | Pipelined CMOS ADC with on-chip SHA and reference |
| Sample Rate (Max) | 32 MSPS |
| Input Type | Single-ended or differential (configurable via SHA) |
| Analog Supply Range | 2.7 V to 5.5 V |
| Digital Supply Range | 2.7 V to 5.5 V |
| Power Dissipation (3 V supply) | 80 mW typical |
| Power Dissipation (5 V supply) | 95 mW typical |
| Sample-and-Hold Bandwidth | 300 MHz (onboard SHA) |
| Data Interface | CMOS / TTL, parallel output |
| Differential Nonlinearity (DNL) | 0.5 LSB (typical) |
| Out-of-Range Indicator | Yes (OTR flag) |
| On-Chip Voltage Reference | Yes (internal 2.5 V) |
| Operating Temperature | -40 C to +85 C |
| Package | 28-lead SSOP (RSZ) |
| Mounting Type | Surface Mount |
| Pin Compatibility | Pin-compatible with AD876-8 |
| RoHS Status | Compliant |
| Lead Free | Yes |
AD9280ARSZ Pin Configuration
| Pin 1 | AVDD — Analog supply voltage (2.7 V to 5.5 V) |
| Pin 2 | VIN+ — Positive analog input (single-ended or differential) |
| Pin 3 | VIN- — Negative analog input (for differential mode) |
| Pin 4 | REF — Reference voltage input/output (internal 2.5 V) |
| Pin 5 | AGND — Analog ground |
| Pin 6 | CLK — Clock input, drives sample-and-hold |
| Pin 7 | DFS — Data format select (binary/2s complement) |
| Pin 8 | DB0 — Data output bit 0 (LSB) |
| Pin 9 | DB1 — Data output bit 1 |
| Pin 10 | DB2 — Data output bit 2 |
| Pin 11 | DB3 — Data output bit 3 |
| Pin 12 | DB4 — Data output bit 4 |
| Pin 13 | DB5 — Data output bit 5 |
| Pin 14 | DB6 — Data output bit 6 |
| Pin 15 | DB7 — Data output bit 7 (MSB) |
| Pin 16 | OTR — Out-of-range indicator |
| Pin 17 | DVDD — Digital supply voltage (2.7 V to 5.5 V) |
| Pin 18 | DGND — Digital ground |
| Pin 19 | NC1 — Not connected (per datasheet) |
| Pin 20 | NC2 — Not connected (per datasheet) |
| Pin 21 | NC3 — Not connected (per datasheet) |
| Pin 22 | NC4 — Not connected (per datasheet) |
| Pin 23 | NC5 — Not connected (per datasheet) |
| Pin 24 | NC6 — Not connected (per datasheet) |
| Pin 25 | NC7 — Not connected (per datasheet) |
| Pin 26 | NC8 — Not connected (per datasheet) |
| Pin 27 | NC9 — Not connected (per datasheet) |
| Pin 28 | NC10 — Not connected (per datasheet) |
Typical Applications
AD9280ARSZ is suitable for 6 applications: Video Digitizer / Frame Grabber, IF Signal Sampling / Communications Receiver, Low-Cost Digital Oscilloscope / PC Instrumentation, CCD/Camera Image Capture for Machine Vision, Portable Battery-Powered Data Logger, Handheld Ultrasonic Flaw Detector.
Video Digitizer / Frame Grabber
The AD9280ARSZ is a near-ideal analog front end for cost-sensitive video digitizers because its 32 MSPS sample rate exceeds the Nyquist requirement for NTSC (14.318 MSPS) and PAL (17.7 MSPS) video, while its 8-bit resolution matches the broadcast-quality visual budget at $5/unit in volume. Placed between a 75-ohm video amplifier/clamper and an FPGA or video processor, the ADC provides a single-rail 3.3 V solution that fits portable capture cards and PC-based DVRs. Unlike 10- or 12-bit parts, the AD9280's 8-bit output keeps FPGA logic complexity and power dissipation low, with internal reference removing a precision reference component. Output coding is straight binary, simplifying downstream color-space conversion in firmware.
Recommended
IF Signal Sampling / Communications Receiver
In a software-defined-radio or low-cost IF digitizer, the AD9280ARSZ's 300 MHz sample-and-hold bandwidth preserves signal integrity well past the 32 MSPS Nyquist limit, allowing direct IF sampling at intermediate frequencies up to approximately 100 MHz when bandpass filtering at the input. Its 70 dB spurious-free dynamic range is adequate for narrow-band communications demodulation where 8 bits of ENOB hold up well above the noise floor. Placed between the mixer IF output and a digital demodulator inside an FPGA, the part replaces a discrete demodulator with one IC. Single-rail 3 V operation at 80 mW keeps the part attractive for portable transceiver designs.
Recommended
Low-Cost Digital Oscilloscope / PC Instrumentation
Portable and PC-based oscilloscopes benefit from the AD9280ARSZ's 32 MSPS real-time sample rate because the ADC directly captures waveform transients with 8-bit amplitude resolution at $5/unit in volume. Placed after a programmable-gain attenuator and input protection network, the ADC streams samples to a USB or LAN microcontroller for display on a host PC. Compared with a 12-bit ADC, the AD9280's lower cost-per-channel lets designers build 4 or 8-channel digitizer cards economically. Internal 2.5 V reference avoids needing a precision reference on the BOM. The 28-SSOP footprint allows compact hand-held form factors.
Recommended
CCD/Camera Image Capture for Machine Vision
In low-cost CCD or CMOS camera digitizer boards, the AD9280ARSZ provides the single-channel 32 MSPS digitizer for sampling color or monochrome sensor output after correlated double sampling. Placed between the CCD output buffer and the camera-link or MIPI serializer, the ADC's 8-bit dynamic range matches sensor pixel depth for cost-sensitive security cameras and machine-vision modules. Single-rail operation simplifies mobile/remote camera power design, and 80 mW dissipation keeps thermal load low in compact enclosures. Industrial -40 to +85 C operating range supports outdoor security deployments.
Recommended
Portable Battery-Powered Data Logger
The AD9280ARSZ's 80 mW dissipation at 3 V supply makes it a strong candidate for battery-powered portable data loggers that capture transient analog signals under field conditions. A 3 V lithium battery can power the ADC plus a small microcontroller and memory for several days of duty-cycled sampling. Placed between a sensor signal conditioner and a low-power MCU, the part provides AC performance at low power without needing a DC-DC boost converter. Its wide 2.7-5.5 V supply range supports direct battery operation across the entire discharge curve. Industrial -40 to +85 C rated parts enable outdoor and vehicle-mounted logging.
Recommended
Handheld Ultrasonic Flaw Detector
Non-destructive-testing instruments such as handheld ultrasonic flaw detectors use the AD9280ARSZ for digitizing the 1-15 MHz band-shifted return pulses after envelope detection. The 32 MSPS sample rate captures sub-microsecond feature resolution required by ultrasonic pulse-echo time-of-flight flaw detection methods. Placed after the receive amplifier and video envelope detector, the ADC feeds a small DSP or FPGA for peak-detection and display. Single-rail 80 mW operation extends battery life in field units. Internal reference simplifies the BOM so the design can fit a sub-$1,000 handheld instrument envelope.
Recommended
Recommended Products Summary
Engineering reference data for AD9280ARSZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD9280ARSZRL | AD9280ARS-REEL | AD876-8ARSZ |
|---|---|---|---|---|
| Package | 28-SSOP (RSZ) | 28-SSOP (RSZ) - same | 28-SSOP (RS) - same | 28-SSOP (RSZ) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 8 bits | 8 bits | 8 bits | 8 bits |
| Sample Rate (max) | 32 MSPS | 32 MSPS | 32 MSPS | 20 MSPS |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 4.5 V to 5.5 V (5 V only) |
| Power Dissipation | 80 mW at 3 V | 80 mW at 3 V | 80 mW at 3 V | 160 mW at 5 V |
| Internal Reference | Yes (2.5 V) | Yes (2.5 V) | Yes (2.5 V) | Yes (2.5 V) |
| RoHS | Yes | Yes | No (non-RoHS legacy) | Yes |
| Lead-Free / Halogen-Free | Yes / Yes | Yes / Yes | Yes / No (legacy) | Yes / Yes |
| Price (1ku qty) | $5.15 | $5.15 | $5.80 (less common, may be obsolete) | $6.50 (older, declining stock) |
Key Differentiators
- Lowest power in its 28-SSOP class at 3 V (vs AD876-8ARSZ)
- True single-supply operation without 5 V rail (vs AD876-8ARSZ)
- Active production and broadly stocked (vs AD9280ARS-REEL)
- Pin-compatibility for legacy migration (vs AD876-8ARSZ)
Design Notes
Decouple each AD9280ARSZ power pin (AVDD and DVDD) with a 0.1 microfarad ceramic capacitor placed as close as physically possible to the IC pins, plus a 10 microfarad bulk capacitor within 1 inch. According to Analog Devices application notes for pipelined ADCs, splitting analog and digital supplies prevents digital switching noise (from the parallel output bus) from coupling into the analog sample-and-hold input. Use a star-ground topology that joins analog ground (AGND, pin 5) and digital ground (DGND, pin 18) at a single point near the IC.
Route the analog input traces (VIN+ / VIN-) symmetrically with impedance-matched 50 ohm traces, and keep the parallel digital output bus (DB0-DB7) traces physically separated by at least 50 mils from the analog traces to minimize digital noise coupling. According to the AD9280 datasheet Rev. E, the CLK trace should be treated as a high-speed signal and routed with matched length and a guard ground on either side. Place the input RC anti-aliasing filter immediately adjacent to VIN+/VIN- pins to avoid ground-bounce noise pickup.
Three frequent mistakes when designing with the AD9280ARSZ: (1) applying a clock signal that is not TTL/CMOS-level or that exceeds 32 MHz - the part latches undefined data above 32 MSPS; (2) driving analog inputs with signals exceeding the full-scale input range (typically 1 V p-p around mid-supply), which causes out-of-range behavior and may saturate the SHA; (3) omitting the 0.1 microfaratedecoupling capacitors - the 28-SSOP does not include internal bypass. Estimated: AVDD supply impedance should remain below 1 ohm from DC to 50 MHz.
For best noise floor at the ADC output, add a 10 ohm series resistor in the analog input trace plus a 100 pF shunt-to-ground capacitor to ground to form a low-pass filter at approximately 160 MHz, just above the analog-input -3 dB bandwidth. According to Analog Devices reference designs for the AD9280, this input network also isolates the input from kickback noise during the 32 MSPS sample instants. Keep the input ground returns short (less than 200 mils) to avoid converting ground noise into common-mode error.
Although the AD9280ARSZ dissipates only 80 mW at 3 V, in enclosed handheld or 4-channel data-acquisition modules, total board power can rise meaningfully. Estimated: 4 channels x 80 mW = 320 mW contributes to the board thermal envelope. Ensure thermal vias in the SSOP power/ground pins are stitched to the internal ground plane; the 28-SSOP pin 5 (AGND) doubles as the primary thermal connection. No active heatsink is required under normal single-channel 3 V operation.
Compliance Information
RoHS compliant per Analog Devices product page. Lead-free and halogen-free per datasheet Rev. E. AEC-Q100 not applicable for general-purpose ADC. Conflict-minerals compliance statement available on Analog Devices supplier-responsibility page.
