Analog Devices Inc. AD9432BSTZ-80

Overview

AD9432BSTZ-80 from Analog Devices is a 12-bit, 80 MSPS monolithic pipeline analog-to-digital converter with on-chip track-and-hold, 500 MHz analog bandwidth, 2.0 V p-p differential input range, and 3.3 V CMOS/TTL-compatible digital outputs. It operates from a single 5.0 V analog supply and supports differential or single-ended encode inputs for base station IF sampling.

For engineers reviewing the AD9432BSTZ-80 datasheet, AD9432BSTZ-80 pinout, AD9432BSTZ-80 application, or AD9432BSTZ-80 equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial-temperature operation (−40°C to +85°C), and real-world ADC interface constraints including aperture jitter (0.25 ps rms), SNR (67 dB @ 49 MHz), and out-of-range flag behavior.

Technical Context

The AD9432BSTZ-80 implements a switched-capacitor pipeline architecture with on-chip reference and input buffer, delivering flat dynamic performance up to Nyquist. Its differential analog input stage is self-biased to 3.0 V common-mode voltage and requires matched source impedances at AIN/AIN for optimal SFDR.

It uses a 10-cycle pipeline latency with latched CMOS/TTL outputs, supports encode rates from 1 MSPS to 80 MSPS, and features an internally generated out-of-range (OR) flag synchronized to output data timing. The device accepts either differential or single-ended TTL/CMOS encode signals with defined VID (750 mV), VIHD (3.5 V), and VICM (1.6 V) thresholds.

Key Specifications

Pinout & Package

The AD9432BSTZ-80 is packaged in a 52-lead thin quad flat package with exposed thermal pad (TQFP_EP, SV-52-2), requiring soldering of the exposed paddle to PCB ground for thermal reliability and EMI control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9432BSTZ-80, AD9434BCPZ-250 offers triple the sample rate but demands more complex clocking and power delivery, while ADS5463IPFP trades parallel bus simplicity for serial data efficiency and higher resolution-neither provides the integrated reference and 3.3 V CMOS compatibility that make AD9432BSTZ-80 optimal for cost-sensitive, space-constrained IF receivers.

Availability

AD9432BSTZ-80 is available at Aetrix Electronics and suitable for wireless infrastructure, broadcast equipment, and test instrumentation requiring stable component supply, long-term obsolescence planning, and guaranteed industrial-temperature performance.

Supply support for AD9432BSTZ-80 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide.

The AD9432 belongs to Analog Devices' high-speed data converter product line, engineered specifically for communications infrastructure applications demanding high dynamic range, low jitter, and robust IF sampling capability in compact form factors.

FAQ

What is the maximum analog input frequency supported by the AD9432BSTZ-80 without violating Nyquist criteria?

The AD9432BSTZ-80 supports a maximum analog input frequency of 40 MHz when operating at its rated 80 MSPS sampling rate, satisfying the Nyquist–Shannon criterion (f_IN < f_S/2). Its 500 MHz analog bandwidth ensures minimal amplitude attenuation and phase distortion up to this frequency, enabling accurate digitization of wideband IF signals in zero-IF receivers. Performance data confirms 67 dB SNR at 49 MHz input, though aliasing risk increases above 40 MHz.

Does the AD9432BSTZ-80 require an external reference, or can it operate with its internal reference?

The AD9432BSTZ-80 can operate with its internal 2.5 V reference (VREFOUT) by connecting Pin 45 (VREFIN) to Pin 46 (VREFOUT) and placing a 0.1 μF decoupling capacitor to ground. This configuration eliminates the need for an external reference in most applications. The internal reference exhibits 50 ppm/°C tempco and maintains 67 dB SNR performance; external references may be used only if tighter voltage accuracy or lower drift is required.

How does the out-of-range (OR) flag behave during overdrive conditions on the AD9432BSTZ-80?

The OR flag on the AD9432BSTZ-80 goes high synchronously with the output data cycle whenever the digitized result equals +2047 or −2048 (full-scale positive or negative), indicating analog input exceeded the 2.0 V p-p range. It remains asserted until the next valid in-range sample appears, with identical 10-cycle pipeline latency and propagation delay as the D11–D0 outputs. The OR signal is internally generated and requires no external logic for clipping detection in real-time signal chains.

What are the power supply requirements for the AD9432BSTZ-80's analog and digital sections?

The AD9432BSTZ-80 requires two independent supplies: a 5.0 V ±5% analog supply (VCC, Pins 2,5,6,10,etc.) for the ADC core and reference, and a 2.7–3.6 V digital supply (VDD, Pins 13,22,23,32) for the CMOS/TTL output drivers. Total typical power dissipation is 850 mW at 80 MSPS. Decoupling capacitors (0.1 μF ceramic + 4.7 μF tantalum) must be placed near each VCC/VDD pin per the layout guidelines in the datasheet to maintain SNR and SFDR performance.

Can the AD9432BSTZ-80 accept single-ended encode clock inputs, or is differential mandatory?

The AD9432BSTZ-80 supports both differential and single-ended encode clock inputs. In single-ended mode, ENCODE (Pin 8) accepts TTL/CMOS logic levels (VIHS ≥ 2.0 V, VILS ≤ 0.8 V), while ENCODE (Pin 7) must be tied to a fixed reference (e.g., 1.6 V) or grounded. However, differential operation is strongly recommended to reject common-mode noise and minimize aperture jitter-datasheet measurements show optimal 0.25 ps rms jitter only under differential drive with 750 mV swing.