Analog Devices Inc. DC997B-F

Overview

DC997B-F from Analog Devices (formerly Linear Technology) is a high-speed ADC evaluation board configured with the LTC2240-10 10-bit, 170 MSPS analog-to-digital converter for RF and IF sampling applications. It supports analog input frequencies from 10 MHz to 250 MHz, features LVDS digital outputs, and uses a 3.3 V ±0.3 V supply delivering up to 500 mA. The board enables rapid performance validation of high-dynamic-range data acquisition systems in communications infrastructure.

For engineers reviewing the DC997B-F datasheet, DC997B-F pinout, DC997B-F application, or DC997B-F equivalent, key considerations include its fixed 10-bit/170 MSPS configuration, LVDS output interface timing, analog input network optimization for 10–250 MHz, jumper-selectable mode/Sense/SHDN-OE logic states, and compatibility with the DC890B data capture platform and PScope software.

Technical Context

The DC997B-F implements a dedicated signal chain for the LTC2240-10 ADC, including a MaCom ETC1-1-13 balun and RC network optimized for 10–250 MHz analog inputs. Its encode clock interface accepts sinusoidal or differential LVDS sources with 50 Ω source impedance and 0.2–2.5 V_P-P amplitude, capacitor-coupled and terminated on-board.

Jumper JP2 selects encoding format (2's complement or offset binary) and Clock Duty Cycle Stabilizer enable state; JP3 configures shutdown and output-enable logic levels; JP4 sets input range (1 V_PP or 2 V_PP) via Sense pin voltage. Digital outputs are routed as LVDS pairs on J2 connector pins [8–46, 56–70] for 10-bit operation.

Key Specifications

Availability

DC997B-F is available at Aetrix Electronics and suitable for RF receiver design, wireless infrastructure testing, and high-speed data acquisition requiring stable component supply, traceable sourcing, and long-term BOM continuity.

Supply support for DC997B-F 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. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision and high-speed applications.

The DC997B-F belongs to ADI's demonstration circuit portfolio for high-speed ADCs, designed specifically to accelerate evaluation and system integration of the LTC2240/LTC2241/LTC2242 family in demanding RF and communications signal chains.

FAQ

What ADC is installed on the DC997B-F evaluation board?

The DC997B-F evaluation board is factory-configured with the LTC2240-10 - a 10-bit, 170 MSPS high-speed analog-to-digital converter featuring LVDS outputs and optimized for RF/IF sampling. This specific ADC variant defines the board's maximum sample rate, resolution, and analog input bandwidth characteristics. No other ADC is installed or supported on the DC997B-F without hardware modification.

Does DC997B-F support both 10 MHz and 250 MHz analog input frequencies?

Yes, the DC997B-F analog input network - comprising the ETC1-1-13 balun and associated RC components - is explicitly optimized for continuous operation from 10 MHz to 250 MHz. This range is validated per the Quick Start Guide and applies directly to the LTC2240-10 configuration on DC997B-F. Performance outside this band requires redesign of the input network per the LTC2240-10 datasheet.

How is the input full-scale range set on DC997B-F?

The DC997B-F input full-scale range is selected via jumper JP4: position "2.5V" configures a 2 V_PP input range, while "VCM" configures a 1 V_PP range. This setting adjusts the Sense pin voltage applied to the LTC2240-10's reference inputs and directly determines the analog input voltage swing the DC997B-F expects for full-scale conversion. Default is 2 V_PP.

Which digital interface does DC997B-F use for data output?

The DC997B-F uses LVDS (Low-Voltage Differential Signaling) for all digital outputs. Data appears as parallel LVDS bit pairs on J2 connector pins [8–46, 56–70], with ground pins separating each pair. The LVDS clock output is available on J2 pins 50 and 52. This interface ensures noise-immune, high-speed transmission compatible with logic analyzers, FPGA development platforms, and the DC890B data capture system.

Is DC997B-F compatible with the DC890B data acquisition controller?

Yes, DC997B-F is fully compatible with the DC890B FastDAACS controller. When connected via the 100-pin ribbon cable and powered externally (6 V, 1 A), the DC890B automatically detects the DC997B-F and loads appropriate PScope configuration - including 10-bit alignment, LVDS FPGA load, and bipolar mode. Manual configuration options are also provided in the Quick Start Guide for DC997B-F.