Analog Devices Inc. AD9432BSTZ-105

Overview

AD9432BSTZ-105 from Analog Devices is a 12-bit, 105 MSPS monolithic pipeline analog-to-digital converter (ADC) 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 zero-IF receivers and HDTV camera digitization.

For engineers reviewing the AD9432BSTZ-105 datasheet, AD9432BSTZ-105 pinout, AD9432BSTZ-105 application, or AD9432BSTZ-105 equivalent, key selection criteria include SNR (67 dB @ 49 MHz), SFDR (80 dB @ 49 MHz), aperture jitter (0.25 ps rms), and industrial temperature range (−40°C to +85°C) in a 52-lead TQFP_EP package.

Technical Context

The AD9432BSTZ-105 implements a switched-capacitor pipeline architecture with on-chip reference (2.5 V ±50 ppm/°C) and self-biased differential analog input buffer (3.0 V common-mode, 2 kΩ input resistance). Its 10-cycle latency and latched output staging ensure deterministic timing at 105 MSPS.

It accepts differential encode clocks (750 mV min amplitude, 1.6 V common-mode) or TTL/CMOS single-ended inputs, with aperture delay of 2.0 ns and propagation delay of 5.5–8.0 ns. Digital outputs use twos complement coding and are powered by a separate 3.3 V supply (VDD = 2.7–3.6 V).

Key Specifications

Pinout & Package

AD9432BSTZ-105 is housed in a 52-lead thin quad flat package with exposed thermal pad (TQFP_EP, SV-52-2), optimized for low θJA (16°C/W at 1.0 m/s airflow) and industrial temperature operation (−40°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 AD9432BSTZ-105, AD9433BSTZ-105 reduces analog supply voltage and power but sacrifices 5 V system compatibility, while ADS5463IPFP trades parallel CMOS outputs and integrated reference for higher speed and resolution at significantly greater power and interface complexity.

Availability

AD9432BSTZ-105 is available at Aetrix Electronics and suitable for wireless infrastructure, broadcast video equipment, and test instrumentation requiring stable component supply across extended product lifecycles.

Supply support for AD9432BSTZ-105 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.

The AD9432BSTZ-105 belongs to Analog Devices' high-speed data converter product line, engineered for demanding communications and imaging systems requiring precision, speed, and integration in compact form factors.

FAQ

What is the maximum analog input frequency supported by the AD9432BSTZ-105 without significant SNR degradation?

The AD9432BSTZ-105 maintains 67 dB SNR up to 49 MHz analog input frequency at 105 MSPS, supported by its 500 MHz analog bandwidth. At 70 MHz input, SNR drops to 66.1 dB per datasheet Table 1, confirming usable performance near the Nyquist limit (52.5 MHz). Performance beyond 70 MHz is limited by harmonic distortion and reduced SFDR.

Does the AD9432BSTZ-105 require an external reference, or can it operate with its internal reference?

The AD9432BSTZ-105 can operate with its internal 2.5 V reference (VREFOUT) by connecting Pin 45 (VREFIN) to Pin 46 (VREFOUT) and bypassing with a 0.1 µF capacitor. External references are optional for tighter tolerance or temperature stability, but the internal reference delivers ±50 ppm/°C tempco and supports full specified performance.

How does the out-of-range (OR) output behave during sustained overrange conditions on the AD9432BSTZ-105?

During sustained overrange, the OR output on the AD9432BSTZ-105 remains high for every clock cycle where the output code equals +2047 or −2048. It tracks pipeline latency (10 cycles) and propagation delay identically to D0–D11, and does not auto-clear until the next in-range sample appears-enabling precise saturation event logging in real-time DSP systems.

Can the AD9432BSTZ-105 be driven directly by PECL-level encode clocks?

No-the AD9432BSTZ-105 encode inputs have a maximum VIHD of 3.5 V, making direct PECL (typically >3.7 V) connection unsafe. PECL sources must be ac-coupled with biasing or translated using compatible level shifters like the MC10EL16, as documented in Figure 27 of the datasheet, to avoid damage and ensure reliable sampling.

What is the recommended power supply sequencing for the AD9432BSTZ-105?

Per datasheet Absolute Maximum Ratings and Thermal Characteristics, VCC (5 V analog) and VDD (3.3 V digital) may be powered simultaneously or in either order-no strict sequencing is required. However, GND connections must be established first, and all supplies must stabilize before applying encode clock to prevent undefined startup behavior or latch-up risk.