AD9225AR - 12-Bit 25 MSPS ADC | Analog Devices
MPN: AD9225AR ✓ ActiveAD9225AR Overview
An ADC is a data-conversion IC that samples an analog voltage and converts it into a numeric value. The AD9225 belongs to the pipelined ADC family, a multistage architecture commonly used for conversion rates from tens of megasamples per second to hundreds of megasamples per second. Within the broader semiconductor hierarchy, it is an analog-to-digital converter, data-converter IC, signal-processing IC, and mixed-signal semiconductor.
Key features include a 12-bit resolution, a 25 MSPS conversion rate, a guaranteed maximum differential nonlinearity error of 0.4 LSB, and guaranteed no missing codes. The converter includes both its sample-and-hold amplifier and voltage reference on chip, reducing the number of external analog components required. Its parallel output architecture supports direct connection to FPGA, CPLD, or data-capture logic for deterministic sampling throughput.
The AD9225 uses a multistage differential pipelined architecture and supports a differential input arrangement with VIN and VINB connections. The manufacturer datasheet recommends centering the analog-input common-mode voltage at approximately 2.5 V by driving VINB from a low-impedance 2.5 V source. With the VREF pin connected directly to SENSE, the reference voltage is 1 V and the corresponding input span is 2 V p-p; the stated valid input-signal range is 1.5 V to 3.5 V.
Typical uses include industrial process monitoring, communications infrastructure, digital oscilloscopes, radar and sonar signal chains, waveform capture, and precision control loops. The AD9225 is especially appropriate when 25 MSPS sampling is sufficient and parallel output provides an advantage over serial-interface converters. Its integrated sample-and-hold and reference functions simplify board design while the single +5 V supply reduces multi-rail complexity.
The main design trade-off is input bandwidth and signal integrity at 25 MSPS. Differential routing, controlled impedance, a low-noise +5 V supply, proper reference decoupling, and careful return-path management are essential for preserving full-scale accuracy. Engineers should also account for digital-output timing when routing 12 parallel data bits plus clock signals into acquisition logic.
This page consolidates the verified manufacturer specifications, current distributor availability, family pin-compatibility information, practical application guidance, and parameter-level replacement analysis. It is designed to help engineers determine whether the AD9225AR fits their acquisition architecture before purchasing or redesigning the board.
Drop-in alternatives for AD9225AR — 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 AD9225AR (same form factor and footprint) — differing in Converter Type, Maximum Sampling Rate, Package, Supply Voltage.
AD9220AR
✅ Drop-InContact for price
View Datasheet →AD9225AR Maximum Ratings & Electrical Characteristics
| Converter Type | Monolithic pipeline ADC |
| Resolution | 12 bit |
| Maximum Sampling Rate | 25 MSPS |
| Architecture | Multistage differential pipelined |
| Input Configuration | Single input, differential analog input arrangement |
| Supply Voltage | +5 V |
| Power Dissipation | 280 mW |
| Maximum Differential Nonlinearity Error | 0.4 LSB |
| Missing Code Performance | No missing codes guaranteed |
| On-Chip Sample-and-Hold Amplifier | Yes |
| On-Chip Voltage Reference | Yes |
| Internal Reference Voltage | 1 V with VREF connected directly to SENSE |
| Input Span | 2 V p-p |
| Valid Input Signal Range | 1.5 V to 3.5 V |
| Recommended Input Common-Mode Voltage | Approximately 2.5 V |
| Package | 28-pin SOIC W |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
AD9225AR 28-pin soic w Pin Configuration Guide
Pin configuration for AD9225AR (28-pin soic w package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for AD9225AR.
Refer to the datasheet for full pin configuration.
Typical Applications
AD9225AR is suitable for 6 applications: Communications Signal Acquisition, Industrial Process Monitoring, Digital Oscilloscope Front End, Radar and Sonar Return Processing, Precision Control and Measurement Loops, Data Acquisition and Test Equipment.
Communications Signal Acquisition
The AD9225AR fits communications and baseband acquisition systems requiring 12-bit conversion data at rates up to 25 MSPS. According to the AD9225 manufacturer datasheet Rev. C, the converter uses a multistage differential pipelined architecture and provides parallel outputs for direct capture by FPGA or CPLD logic. Place VIN and VINB on controlled-impedance, differentially routed traces and center the input common mode near 2.5 V. The principal benefit is deterministic parallel throughput, although system designers must verify bandwidth, output timing, and clock-crossing requirements against the downstream logic.
Recommended
Industrial Process Monitoring
The AD9225AR is suitable for industrial measurement systems that need repeatable 12-bit samples at up to 25 MSPS without a multi-rail converter arrangement. According to the AD9225 manufacturer datasheet Rev. C, it operates from a single +5 V supply and integrates the sample-and-hold amplifier and voltage reference. Its 0.4 LSB maximum differential nonlinearity specification and guaranteed no-missing-code performance help support predictable signal-chain behavior. Use short analog traces, solid grounding, and decoupled supply rails, while ensuring the input remains within the specified 1.5 V to 3.5 V range.
Recommended
Digital Oscilloscope Front End
The AD9225AR can serve as the analog acquisition stage in a digital oscilloscope or portable waveform instrument when 25 MSPS and 12-bit resolution are adequate. According to the AD9225 manufacturer datasheet Rev. C, the converter provides parallel digital outputs and integrates its sample-and-hold amplifier and voltage reference. The 280 mW typical dissipation supports a compact instrument architecture, but high-frequency board layout remains critical. Keep the analog path short, control return currents, and route the output clock and data together to minimize timing skew at the capture FPGA.
Recommended
Radar and Sonar Return Processing
The AD9225AR is appropriate for intermediate-rate radar, sonar, and vibration-acquisition chains requiring 12-bit data at up to 25 MSPS. According to the AD9225 manufacturer datasheet Rev. C, its differential pipelined architecture and on-chip sample-and-hold amplifier support controlled conversion of analog returns into parallel digital words. The recommended 2.5 V common-mode level and 2 V p-p span simplify front-end matching when the input network is designed around those conditions. Engineers should budget extra routing margin for filtering, gain, aliasing control, and synchronization with the processing logic.
Recommended
Precision Control and Measurement Loops
The AD9225AR can be used in closed-loop control and precision measurement systems that require more conversion throughput than a low-speed SAR ADC while accepting 12-bit resolution. According to the AD9225 manufacturer datasheet Rev. C, the converter achieves 25 MSPS, guarantees no missing codes, and limits differential nonlinearity to 0.4 LSB. Its single +5 V supply and integrated reference reduce system complexity, while parallel outputs permit direct transfer into digital control logic. Confirm acquisition latency and output timing in the complete loop because the supplied excerpts do not specify a pipeline-delay value.
Recommended
Data Acquisition and Test Equipment
The AD9225AR is well suited to modular data-acquisition equipment, automated test systems, and instrumentation that captures repetitive analog waveforms at 25 MSPS. According to the AD9225 manufacturer datasheet Rev. C, its 12-bit parallel output can feed FPGA-based acquisition and processing logic without a serial interface. The integrated sample-and-hold amplifier and reference reduce external component count, while the single +5 V supply simplifies power planning. For dependable measurements, decouple both the supply and reference network, preserve the 2.5 V common-mode requirement, and verify output timing across temperature and process conditions.
Recommended
Engineering reference data for AD9225AR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD9220AR |
|---|---|---|
| Package | 28-pin SOIC W | 28-pin SOIC W |
| Brand | Analog Devices | Analog Devices |
Key Differentiators
- Integrated acquisition front end (vs AD9220AR)
- Guaranteed conversion linearity and code continuity (vs AD9220AR)
- Single +5 V acquisition architecture (vs AD9220AR)
Design Notes
Route the analog input as a short, controlled-impedance differential pair and preserve the approximately 2.5 V common-mode requirement identified in the AD9225 manufacturer datasheet Rev. C. Keep the VINB return path continuous and closely coupled to VIN to minimize common-mode conversion and susceptibility to noise. Avoid routing the clock and parallel data through the analog-input region, and place any gain or filtering network close enough to the converter to minimize accumulated propagation delay.
Decouple the single +5 V supply close to the device and isolate it from switching converters and digital output currents. The AD9225 has 280 mW typical dissipation, but converter reference performance can still be disturbed by supply ripple. Use low-ESR local bypass capacitance with the values and layout prescribed by the complete manufacturer datasheet. The supplied excerpts also require capacitor networks on CAPT and CAPB for proper reference decoupling, so do not omit those network components.
Do not assume that every ADI family member with a similar 28-pin package is an electrically equivalent replacement. The manufacturer states pin compatibility with AD9220, AD9221, AD9223, and AD9224, but conversion rate, output timing, input bandwidth, and power can differ. Before substituting a family member, compare the complete AD9225 and candidate data sheets, especially clock latency, output timing, input voltage range, and acquisition bandwidth.
Compliance Information
The verified Mouser search result identifies AD9225AR as RoHS compliant. The supplied excerpts do not provide REACH, lead-free, halogen-free, or conflict-minerals declarations; AEC-Q100 is not applicable because this is an analog-to-digital converter rather than an automotive-qualified device.
