Analog Devices Inc. AD9220AR

Overview

AD9220AR from Analog Devices is a monolithic 12-bit analog-to-digital converter with 10.0 MSPS sampling rate, 70 dB SINAD, and 88 dB SFDR, operating on a single 5 V analog supply and 2.7–5.25 V digital supply. It integrates a low-noise sample-and-hold amplifier and programmable 1 V/2.5 V voltage reference, and is used in high-speed data acquisition systems requiring precise digitization of baseband or IF signals.

For engineers reviewing the AD9220AR datasheet, AD9220AR pinout, AD9220AR application, or AD9220AR equivalent, key selection criteria include its 10 MSPS throughput, 0.09 LSB input-referred noise at 2.5 V reference, guaranteed no missing codes, straight binary output format, and compatibility with both single-ended and differential analog inputs up to 5 V_p-p.

Technical Context

The AD9220AR employs a 4-stage differential pipelined architecture with digital error correction logic, achieving true 12-bit linearity and 11.3 ENOB across its full 10 MSPS range. Its sample-and-hold amplifier supports flexible input configurations - including dc-coupled differential, ac-coupled differential, and single-ended - with common-mode level set via CML pin and reference selection controlled by SENSE pin.

Internal timing uses both clock edges: sampling occurs on the rising edge, while the SHA tracks during the low phase and holds during the high phase. Pipeline latency is fixed at 3 clock cycles, and the out-of-range (OTR) signal provides overflow detection synchronized to the data output.

Key Specifications

Pinout & Package

AD9220AR is housed in a 28-lead SOIC package (R-28 option), with exposed pad not present; thermal resistance θ_JA = 71.4°C/W. Pin functions are fully compatible across the AD9221/AD9223/AD9220 family.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9223AR and ADS8325IPW, the AD9220AR uniquely delivers 10 MSPS throughput with integrated reference and differential input flexibility - making it optimal for wideband signal capture where speed, integration, and noise performance are jointly critical.

Availability

AD9220AR is available at Aetrix Electronics and suitable for medical ultrasound beamforming, communications baseband digitization, and industrial process monitoring requiring stable component supply and long-term manufacturability.

Supply support for AD9220AR 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.

The AD9220AR belongs to Analog Devices' monolithic pipeline ADC product line, designed specifically for cost-sensitive, high-speed data acquisition systems requiring integrated reference, low power, and flexible analog input architectures.

FAQ

What is the maximum sampling rate supported by the AD9220AR?

The AD9220AR supports a maximum conversion rate of 10.0 MSPS, as specified in its datasheet under all operating conditions from –40°C to +85°C. This rate is enabled by its optimized 4-stage pipelined architecture and low-latency digital correction logic. The AD9220AR maintains 70 dB SINAD and guaranteed no missing codes at this full rate, making it suitable for demanding real-time digitization tasks. Performance remains stable across the full temperature range without derating.

Does the AD9220AR require an external voltage reference?

No, the AD9220AR does not require an external voltage reference because it includes a programmable internal reference generating either 1.0 V or 2.5 V, selected via the SENSE pin. When using the internal reference, REFCOM must be connected to AVSS. An external reference can be applied to the VREF pin if higher dc accuracy or custom reference voltage is needed - but doing so disables the internal reference. The AD9220AR's internal reference has ±35 mV tolerance in 2.5 V mode.

How is differential input configured on the AD9220AR?

Differential input on the AD9220AR is configured by applying complementary signals to VINA (+) and VINB (–), with their difference defining the core input voltage (VCORE = VINA – VINB). The common-mode level is set independently via the CML pin, typically tied to AVDD/2 (2.5 V). To enable differential mode, SENSE must be grounded (for internal 2.5 V reference) and REFCOM connected to AVSS. This configuration achieves superior THD and SFDR compared to single-ended use due to inherent common-mode noise rejection.

What is the meaning of the OTR signal on the AD9220AR?

The OTR (Out-of-Range) signal on the AD9220AR is an active-high digital output that indicates overflow - i.e., when the analog input exceeds the valid range defined by ±VREF. It is synchronized to the data output and appears on the same clock cycle as the corresponding 12-bit sample. When OTR is asserted, the MSB (BIT 1) reflects polarity: high MSB indicates positive overflow, low MSB indicates negative overflow. This enables precise saturation detection without additional logic in real-time signal processing pipelines.

Can the AD9220AR operate with a 3.3 V digital supply?

Yes, the AD9220AR supports a digital supply (DVDD) range of 2.7 V to 5.25 V, fully covering standard 3.3 V logic levels. Its digital outputs are compatible with both 3.3 V and 5 V CMOS/TTL families: VOH is 2.80 V min at IOH = 0.5 mA with DVDD = 3 V, and VOL is 0.4 V max at IOL = 1.6 mA. This dual-voltage capability allows direct interfacing with modern FPGAs and microcontrollers without level shifters, reducing BOM count and layout complexity in mixed-supply systems.