Analog Devices Inc. AD9445BSVZ-105

Overview

AD9445BSVZ-105 from Analog Devices is a 14-bit, 105 MSPS IF sampling analog-to-digital converter (ADC) with on-chip track-and-hold, optimized for multicarrier cellular infrastructure receivers. It delivers 73.0 dBFS SNR at 300 MHz input (2.0 V p-p), supports LVDS/CMOS outputs, and operates from 3.3 V and 5.0 V supplies across −40°C to +85°C.

For engineers reviewing the AD9445BSVZ-105 datasheet, AD9445BSVZ-105 pinout, AD9445BSVZ-105 application, or AD9445BSVZ-105 equivalent, key selection criteria include guaranteed 105 MSPS sampling rate, 615 MHz analog bandwidth, RF ENABLE pin configuration for >230 MHz inputs, and 100-lead TQFP/EP package thermal performance (θJC = 2°C/W).

Technical Context

The AD9445BSVZ-105 implements a pipeline ADC architecture with buffered differential analog inputs (VIN+, VIN−), dual-supply operation (AVDD1 = 3.3 V, AVDD2 = 5.0 V), and selectable output modes (LVDS or CMOS). Its clock duty cycle stabilizer (DCS) maintains performance over wide input clock pulse width variation.

Functional flexibility includes RF ENABLE pin control for SFDR optimization above 230 MHz, OUTPUT MODE pin selection between LVDS and CMOS, and DFS pin choice of offset binary or twos complement data format - all implemented via CMOS-compatible logic-level control signals.

Key Specifications

Pinout & Package

The AD9445BSVZ-105 is housed in a Pb-free, 100-lead TQFP/EP (exposed pad) package with θJC = 2°C/W, requiring soldered connection of the exposed heat sink to AGND for thermal integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9445BSVZ-105, AD9446BCPZ-105 offers superior thermal performance in smaller footprint but sacrifices RF ENABLE flexibility, while ADS5463IPFP trades resolution for raw speed and bandwidth - making AD9445BSVZ-105 optimal for cost-sensitive, thermally managed IF sampling where 14-bit fidelity and adaptive SFDR tuning are essential.

Availability

AD9445BSVZ-105 is available at Aetrix Electronics and suitable for cellular infrastructure, radar systems, medical ultrasound, and communications test equipment requiring stable component supply and long-term industrial temperature support.

Supply support for AD9445BSVZ-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 AD9445 product line targets high-speed data acquisition in wireless infrastructure and defense electronics, emphasizing IF sampling capability, integrated functionality, and robust thermal packaging for continuous operation.

FAQ

What is the maximum analog input frequency supported by the AD9445BSVZ-105?

The AD9445BSVZ-105 features a 615 MHz analog bandwidth, enabling direct sampling of IF signals up to the third Nyquist zone. Its specified AC performance remains valid through 450 MHz input (70.5 dBFS SNR), with RF ENABLE pin configuration required for optimal SFDR above 230 MHz. This makes AD9445BSVZ-105 suitable for L-band and S-band IF digitization without external anti-alias filtering in many implementations.

Does the AD9445BSVZ-105 require an external reference voltage?

No, the AD9445BSVZ-105 includes an internal trimmed 1.0 V reference usable when the SENSE pin is tied to AGND. External reference operation is optional and enabled by connecting SENSE to AVDD1, allowing system-level reference sharing or precision calibration. The internal reference eliminates BOM cost and layout complexity for most IF sampling applications where ±1% accuracy suffices.

How does the RF ENABLE pin affect performance of the AD9445BSVZ-105?

The RF ENABLE pin configures the AD9445BSVZ-105 analog front end for optimal SFDR: grounding it maximizes performance for analog inputs below 230 MHz, while tying it to AVDD1 improves SFDR for inputs above 230 MHz. This pin directly adjusts biasing in the track-and-hold and input amplifier stages - a hardware-level adaptation not achievable via register programming - making AD9445BSVZ-105 uniquely adaptable to diverse IF band plans.

What are the power supply requirements for the AD9445BSVZ-105?

The AD9445BSVZ-105 requires three independent supplies: AVDD1 = 3.3 V ±5% (analog core), AVDD2 = 5.0 V ±5% (track-and-hold and input buffer), and DRVDD = 3.3 V (digital outputs). Total power dissipation is 2.2 W in LVDS mode. Proper decoupling (0.1 μF + 10 μF per supply) and separation of AGND/DGND planes are mandatory to achieve specified SNR and SFDR performance.

Can the AD9445BSVZ-105 operate in both LVDS and CMOS output modes simultaneously?

No, the AD9445BSVZ-105 supports only one output mode at a time, selected by the OUTPUT MODE pin: low for CMOS, high for LVDS. The output drivers are physically distinct circuit blocks; simultaneous activation is not possible. CMOS mode draws less current (2.0 W vs. 2.2 W) but limits trace length and noise immunity, whereas LVDS mode enables longer interconnects and better EMI rejection in dense PCB environments - a hardware-level trade-off defined at power-up.