Analog Devices Inc. AD9220ARS

Overview

AD9220ARS from Analog Devices is a monolithic 12-bit analog-to-digital converter with 10.0 MSPS sampling rate, 70 dB SINAD, 88 dB SFDR, and single 5 V analog supply. It integrates on-chip sample-and-hold amplifier and programmable voltage reference (1 V or 2.5 V), and is used in high-speed data acquisition systems requiring precise digitization of baseband or IF signals.

For engineers reviewing the AD9220ARS datasheet, AD9220ARS pinout, AD9220ARS application, or AD9220ARS equivalent, key selection criteria include its 10 MSPS throughput, 0.09 LSB input-referred noise at 2.5 V reference, 3-clock-cycle pipeline latency, differential/single-ended input flexibility, and SSOP-28 package compatibility with AD9221/AD9223 family members.

Technical Context

The AD9220ARS employs a 4-stage differential pipelined architecture with digital error correction logic to guarantee no missing codes and 12-bit accuracy across temperature. Its sample-and-hold amplifier supports both single-ended and differential inputs with configurable common-mode level (via CML pin) and selectable input span (2 V or 5 V p-p).

Internal timing uses both clock edges: sampling occurs on the rising edge, while hold mode is active during the high phase. The device features straight-binary output format, out-of-range (OTR) flag for overflow detection, and dual-supply operation (5 V AVDD, 2.7–5.25 V DVDD) enabling interface with 3.3 V or 5 V logic families.

Key Specifications

Pinout & Package

AD9220ARS is housed in a 28-lead SSOP (RS-28) package with 0.635 mm lead pitch and exposed pad thermal design. Pin layout matches AD9221/AD9223 family for drop-in compatibility across sample rates.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit high-speed ADC applications.

Compared with AD9223ARS, AD9220ARS delivers 3.3× higher sample rate and 2.5× greater SFDR at the cost of +154 mW power; versus ADS8325IPFB, it trades 4-bit resolution for 100× speed, parallel interface, and integrated analog front end - making AD9220ARS optimal for real-time streaming, not static measurement.

Availability

AD9220ARS is available at Aetrix Electronics and suitable for medical ultrasound beamforming, communications direct-IF receivers, industrial process monitoring, test & measurement oscilloscope front ends, and high-speed data acquisition systems requiring stable component supply and long-term production continuity.

Supply support for AD9220ARS 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 R&D and manufacturing operations worldwide.

The AD9220ARS belongs to Analog Devices' AD922x family of monolithic 12-bit pipelined ADCs, designed specifically for cost-sensitive, space-constrained applications demanding high speed, low power, and integrated analog functionality - including medical imaging, communications infrastructure, and automated test equipment.

FAQ

What is the maximum sampling rate supported by the AD9220ARS?

The AD9220ARS supports a guaranteed minimum conversion rate of 10.0 MSPS, with timing specifications defined for clock periods down to 100 ns (t_C). Its full-power bandwidth is 60 MHz, enabling accurate digitization of input signals up to the Nyquist frequency of 5 MHz. The AD9220ARS maintains specified AC performance (70 dB SINAD, 88 dB SFDR) at this maximum rate under standard operating conditions (AVDD = 5 V, VREF = 2.5 V, T_A = 25°C).

Does the AD9220ARS require an external voltage reference?

No, the AD9220ARS includes a fully integrated, programmable voltage reference that can be configured for either 1.0 V or 2.5 V output via the SENSE pin. When using the internal reference, VREF provides the reference voltage and REFCOM serves as its return path. An external reference may be applied if tighter initial accuracy or lower temperature drift is required, but it is not mandatory for standard operation of the AD9220ARS.

How does the AD9220ARS handle differential versus single-ended analog inputs?

The AD9220ARS accepts both differential (VINA – VINB) and single-ended inputs through the same pins. For differential mode, the input signal is applied across VINA and VINB with common-mode voltage set via CML pin (typically 2.5 V). For single-ended mode, VINB is held at a fixed dc bias (e.g., 2.5 V), and the signal drives VINA. The internal architecture ensures matched gain and phase response, preserving distortion performance in either configuration - a capability confirmed in AD9220ARS datasheet Figures 22–27.

What is the purpose of the OTR (Out-of-Range) pin on the AD9220ARS?

The OTR pin on the AD9220ARS is an active-high indicator that asserts when the analog input exceeds the valid range defined by ±VREF at the A/D core. It works in conjunction with the MSB to distinguish between high overflow (OTR high, MSB high) and low overflow (OTR high, MSB low). This real-time saturation detection enables immediate gain adjustment or alarm triggering in closed-loop acquisition systems without requiring post-processing analysis of the AD9220ARS output data stream.

Is the AD9220ARS pin-compatible with other members of the AD922x family?

Yes, the AD9220ARS shares identical pinout, package (28-lead SSOP), and interface signals with AD9221ARS and AD9223ARS. All three devices use the same CLK, VINA/VINB, VREF/REFCOM, BIT[1:12], OTR, AVDD/AVSS, DVDD/DVSS, and auxiliary pins (CAPT, CAPB, SENSE, CML). This allows direct substitution on the same PCB layout - enabling scalable system design where sample rate can be adjusted via part number selection without hardware revision.