AD4080 - 20-Bit 40 MSPS SAR ADC | Analog Devices
MPN: AD4080 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $55.99 | $55.99 |
| 10 | $52 | $520.00 |
| 100 | $48 | $4,800.00 |
| 500 | $44 | $22,000.00 |
| 1,000 | $40 | $40,000.00 |
AD4080 Overview
A SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm to convert an analog input into a digital output. It operates by comparing the input voltage against a series of reference voltages, successively narrowing down the range until the digital code is determined. SAR ADCs are known for their high resolution, low power consumption, and fast conversion times, making them suitable for applications such as medical imaging, industrial process control, and scientific instrumentation. The AD4080 is a high-performance member of this family, offering 20-bit resolution at a high sampling rate.
Key features of the AD4080 include Easy Drive technology, which reduces input-dependent signal currents and simplifies the driving amplifier requirements. This feature minimizes converter-induced settling artifacts, allowing for lower power consumption and greater channel density. The device also supports differential input signals, which improves common-mode rejection and reduces noise. With a 40 MSPS throughput, it can capture fast-changing signals with high fidelity.
The AD4080 is designed for precision applications where low noise and high linearity are critical. Its 20-bit resolution and >90 dBFS SINAD ensure accurate representation of small signal variations. The device operates from a 1.8 V supply and features a serial LVDS interface for high-speed data transfer. It includes an internal reference buffer and supports external reference options for flexibility.
Typical applications include medical imaging systems, such as ultrasound and MRI, where high-resolution data acquisition is essential. It is also used in industrial automation for precise measurement and control, and in scientific instrumentation for capturing high-speed, low-amplitude signals. The AD4080's Easy Drive input structure simplifies the front-end design, reducing component count and board space.
When designing with the AD4080, it is important to provide a clean, low-jitter sampling clock to achieve optimal noise performance. The differential input should be driven by a low-noise amplifier with sufficient bandwidth to avoid aliasing. Proper decoupling of the power supply pins and careful PCB layout are essential to minimize noise coupling.
Drop-in alternatives for AD4080 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD4081BBCZ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD4084BBCZ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD4880BBCZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD4080 Maximum Ratings & Electrical Characteristics
| Resolution | 20 bits |
| Sampling Rate | 40 MSPS |
| Input Type | Differential |
| Architecture | SAR |
| SINAD | >90 dBFS |
| Number of Inputs | 1 |
| Data Interface | Serial LVDS |
| Package | 49-CSPBGA (5x5 mm) |
| Supply Voltage | 1.8 V |
| Reference Type | Internal/External |
| RoHS Status | Compliant |
AD4080 Pin Configuration
| Pin A1 | VIN+ — Positive differential analog input |
| Pin A2 | VIN- — Negative differential analog input |
| Pin B1 | VREF — Voltage reference input/output |
| Pin B2 | GND — Ground |
| Pin C1 | VDD — Power supply (1.8 V) |
| Pin C2 | CLK+ — Positive sampling clock input |
| Pin D1 | CLK- — Negative sampling clock input |
| Pin D2 | LVDS+ — Positive LVDS data output |
| Pin E1 | LVDS- — Negative LVDS data output |
| Pin E2 | SYNC — Synchronization input |
| Pin F1 | PDWN — Power-down control |
| Pin F2 | RESET — Reset input |
Typical Applications
AD4080 is suitable for 6 applications: Medical Imaging, Industrial Automation, Scientific Instrumentation, Communications, Test and Measurement, Aerospace and Defense.
Medical Imaging
The AD4080's 20-bit resolution and 40 MSPS sampling rate enable high-fidelity capture of ultrasound and MRI signals. Its low noise and high SINAD (>90 dBFS) ensure accurate representation of small amplitude variations, critical for diagnostic imaging. The Easy Drive input simplifies front-end design, reducing component count and power consumption in portable systems.
Recommended
Industrial Automation
In industrial process control, the AD4080 provides precise measurement of sensor signals with 20-bit resolution. Its high sampling rate allows real-time monitoring of fast-changing parameters. The differential input rejects common-mode noise, improving accuracy in noisy factory environments. The serial LVDS interface simplifies data transfer to FPGAs or DSPs.
Recommended
Scientific Instrumentation
The AD4080 is ideal for scientific instruments requiring high-speed, high-resolution data acquisition, such as spectrometers and particle detectors. Its low noise and high linearity preserve signal integrity. The Easy Drive technology reduces settling artifacts, enabling accurate measurement of fast transients. The compact CSPBGA package fits space-constrained designs.
Recommended
Communications
In communication systems, the AD4080 digitizes wideband signals with high dynamic range. Its 40 MSPS sampling rate supports IF sampling in software-defined radios. The differential input and high SINAD ensure low distortion, preserving signal quality. The serial LVDS output reduces digital noise coupling, maintaining analog performance.
Recommended
Test and Measurement
The AD4080 is used in high-resolution digitizers and data acquisition cards. Its 20-bit resolution and 40 MSPS sampling rate allow accurate capture of waveforms. The Easy Drive input simplifies driving circuitry, reducing design complexity. The device's low power consumption is beneficial for portable test equipment.
Recommended
Aerospace and Defense
In aerospace and defense applications, the AD4080 provides high-resolution conversion for radar and electronic warfare systems. Its wide bandwidth and high SINAD ensure accurate signal processing. The rugged CSPBGA package is suitable for harsh environments. The device's low power dissipation is critical for airborne systems.
Recommended
Recommended Products Summary
Engineering reference data for AD4080 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD4081BBCZ | AD4084BBCZ | AD4880BBCZ |
|---|---|---|---|---|
| Package | 49-CSPBGA (5x5 mm) | 49-CSPBGA (5x5 mm) | 49-CSPBGA (5x5 mm) | 49-CSPBGA (5x5 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 20 bits | 20 bits | 16 bits | 20 bits |
| Sampling Rate | 40 MSPS | 20 MSPS | 40 MSPS | 40 MSPS per channel |
| Input Type | Differential | Differential | Differential | Differential |
| Data Interface | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS |
| Integrated Drivers | No | No | No | Yes |
Key Differentiators
- Higher sampling rate than AD4081 (vs AD4081BBCZ)
- Higher resolution than AD4084 (vs AD4084BBCZ)
- Easy Drive technology reduces front-end complexity (vs AD4880BBCZ)
Design Notes
The AD4080 operates from a 1.8 V supply. Ensure a clean, low-noise power source with adequate decoupling capacitors (e.g., 0.1 uF and 10 uF) placed close to the VDD pins. The Easy Drive input reduces signal-dependent current, but proper power supply filtering is still critical to achieve the specified SINAD performance.
For optimal performance, use a solid ground plane and minimize trace lengths for the differential input and clock signals. Route the LVDS output pairs with controlled impedance (100 ohm differential) and avoid crossing noisy digital traces. Follow the layout guidelines in the datasheet to minimize parasitic capacitance and inductance.
A common mistake is driving the differential input with a single-ended source without proper conversion. Use a differential driver or a balun to maintain the benefits of differential signaling. Also, ensure the sampling clock has low jitter, as clock jitter directly degrades SNR. Refer to the datasheet for recommended clock sources.
Compliance Information
RoHS compliance inferred from Analog Devices standard practice; not explicitly stated in provided data.