Analog Devices Inc. AD9023BZ

Overview

AD9023BZ from Analog Devices is a monolithic 12-bit, 20 MSPS analog-to-digital converter with on-chip track-and-hold (T/H) and voltage reference, ECL-compatible digital I/O, ±1.024 V analog input range, 110 MHz analog bandwidth, and specified operation from –25°C to +85°C in ceramic gullwing surface-mount package. It delivers 74 dB spurious-free dynamic range at 1.2 MHz input and supports undersampling applications such as direct IF digitization in radar receivers.

For engineers reviewing the AD9023BZ datasheet, AD9023BZ pinout, AD9023BZ application, or AD9023BZ equivalent, key selection considerations include ECL logic compatibility, 20 ns transient response settling time, DNL < 0.75 LSB (typ), SFDR ≥ 72 dB at 9.6 MHz, and dual-supply operation at +5 V / –5.2 V with 1.5 W typical power dissipation.

Technical Context

The AD9023BZ implements a three-pass subranging architecture with digital error correction to achieve 12-bit accuracy at high speed. Its internal T/H features 110 MHz bandwidth and is optimized for analog input frequencies above Nyquist, enabling direct IF sampling up to 70 MHz when paired with external Samplifier™ devices like AD9100/AD9101.

All timing is generated internally upon rising edge of ENCODE; output data appears after two pipeline delays plus propagation delay (t_OD = 8.5–19.5 ns). Conversion is initiated by a single ECL-compatible encode pulse with minimum 22.5 ns high-time and strict jitter control required to preserve SFDR performance.

Key Specifications

Pinout & Package

AD9023BZ is housed in a 28-pin ceramic leaded chip carrier (LCC) with gullwing surface-mount leads (Z-28 package). The package has 0.050" lead pitch, 0.755" × 0.755" body, and is rated for industrial temperature range (–25°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9022BZ, AD9023BZ offers superior jitter immunity and faster edge rates for ECL-clocked systems but demands stricter layout and termination. Versus AD9220AR, AD9023BZ provides integrated signal conditioning and double the sampling rate at lower system-level power, though with more complex supply and grounding requirements.

Availability

AD9023BZ is available at Aetrix Electronics and suitable for radar receivers, digital communications infrastructure, and medical imaging systems requiring stable component supply, long-term obsolescence planning, and traceable sourcing for industrial-grade analog signal chains.

Supply support for AD9023BZ 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 design centers worldwide and ISO 9001-certified manufacturing.

The AD9023BZ belongs to Analog Devices' high-speed precision ADC product line, engineered for demanding RF and IF digitization applications where dynamic performance, integration, and reliability outweigh cost sensitivity.

FAQ

What is the absolute maximum analog input voltage for the AD9023BZ?

The absolute maximum analog input voltage for the AD9023BZ is –VS to +VS, i.e., –5.45 V to +6 V. However, the specified full-scale input range is ±1.024 V, and operation beyond this range risks clipping, distortion, or damage. The device's 300 Ω input impedance and 110 MHz bandwidth mean that overvoltage protection relies on external clamping; exceeding ±1.024 V during normal operation violates the AD9023BZ's AC and DC accuracy specifications.

Does the AD9023BZ require external reference or track-and-hold circuitry?

No, the AD9023BZ does not require external reference or track-and-hold circuitry. It integrates an on-chip voltage reference establishing a fixed ±1.024 V full-scale range and a high-bandwidth (110 MHz) track-and-hold amplifier. These functions are fully self-contained, eliminating the need for external components in most applications-though external buffering (e.g., AD96xx amplifiers) is recommended when driving from high-impedance sources.

What are the power supply requirements for reliable operation of the AD9023BZ?

The AD9023BZ requires two dedicated supplies: +VS = +5.0 V ±2.5% (4.75 V to 5.25 V) and –VS = –5.2 V ±5% (–5.45 V to –4.95 V). Typical supply currents are +VS = 120 mA and –VS = 240 mA, yielding ~1.5 W total dissipation. Each +VS and –VS pin must be individually bypassed with a 0.1 µF ceramic capacitor to GND, and the COMP pin (17) must connect to –VS via another 0.1 µF capacitor placed within 2 mm of the pin.

Can the AD9023BZ be used in undersampling applications above its Nyquist frequency?

Yes, the AD9023BZ is explicitly designed for undersampling applications. Its 110 MHz analog bandwidth and on-chip T/H enable accurate digitization of IF signals up to 70 MHz when paired with external RF track-and-holds like the AD9100 or AD9101 Samplifier™. At 9.6 MHz input, the AD9023BZ achieves 72 dB SFDR and 62 dB SNR, confirming robust performance well above the 10 MHz Nyquist limit of its 20 MSPS sampling rate.

How does the ECL interface of the AD9023BZ differ from the TTL interface of the AD9022BZ?

The AD9023BZ uses ECL-compatible digital I/O (Logic "1" = –1.1 V, Logic "0" = –1.5 V, 100 Ω termination to –2.0 V), while the AD9022BZ uses TTL-compatible I/O (Logic "1" ≥ 2.4 V, Logic "0" ≤ 0.8 V, 5 V supply referenced). Though pinouts are nearly identical, the AD9023BZ's ECL interface delivers lower jitter, faster edge rates, and better noise immunity in high-speed synchronous systems-but requires precise termination and dual-voltage supply support not needed for the AD9022BZ.