Analog Devices Inc. DC997B-B

Overview

DC997B-B from Analog Devices (formerly Linear Technology) is a high-speed ADC evaluation board configured with the LTC2241-12 12-bit, 210 MSPS analog-to-digital converter. It supports analog input frequencies from 10 MHz to 250 MHz, features LVDS digital outputs, and is optimized for RF receiver, communications test, and wideband instrumentation applications.

For engineers reviewing the DC997B-B datasheet, DC997B-B pinout, DC997B-B application, or DC997B-B equivalent, key selection considerations include its fixed LTC2241-12 integration, 3.3 V ±10% supply requirement, 1–2 V_PP analog input range, LVDS output interface, and jumper-configurable mode/Sense/SHDN-OE logic states.

Technical Context

The DC997B-B implements a dedicated analog front-end with ETC1-1-13 balun and RC network tuned for 10–250 MHz signal acquisition. Its encode clock interface accepts capacitor-coupled sine or square wave inputs (0.2–2.5 V_P-P) into a 50 Ω source-terminated SMA connector.

Digital output routing delivers 12-bit parallel LVDS data across pins 8–46 and 56–82 of J2, with isolated ground pins between pairs. Mode, shutdown, and sense functions are controlled via three physical jumpers (JP2, JP3, JP4), enabling 2's complement/offset binary format selection and Clock Duty Cycle Stabilizer activation per ADC variant requirements.

Key Specifications

Availability

DC997B-B is available at Aetrix Electronics and suitable for RF receiver design, high-speed data acquisition systems, and wideband spectrum analysis requiring stable component supply and validated reference hardware.

Supply support for DC997B-B 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) designs precision analog, mixed-signal, and digital signal processing ICs for measurement, control, and connectivity applications.

The DC997B-B belongs to ADI's demonstration circuit series for high-speed ADCs, developed to accelerate evaluation of the LTC224x family in RF, communications, and test equipment.

FAQ

What ADC is integrated on the DC997B-B evaluation board?

The DC997B-B evaluation board is factory-configured with the LTC2241-12, a 12-bit, 210 MSPS high-speed analog-to-digital converter featuring LVDS outputs and optimized for wideband RF sampling. This specific ADC device is permanently mounted and cannot be substituted without board modification. The DC997B-B does not support user-replaceable ADCs.

Does the DC997B-B support both 10-bit and 12-bit operation?

No - the DC997B-B is a fixed-configuration board populated exclusively with the LTC2241-12 12-bit ADC. While the broader DC997 platform includes variants like DC997B-D (LTC2242-10) and DC997B-E (LTC2241-10), the DC997B-B itself operates only at 12-bit resolution and 210 MSPS maximum sample rate as specified in Table 1 of its Quick Start Guide.

What is the required encode clock specification for DC997B-B?

The DC997B-B requires a low-jitter encode clock applied to its "ENCODE CLK" SMA connector, with amplitude between 0.2 V_P-P and 2.5 V_P-P, 50 Ω source impedance, and capacitor coupling. Sine or square wave formats are supported. Performance-critical applications demand ultra-low phase noise sources to preserve SFDR and SNR as documented in the LTC2241-12 datasheet.

How do I configure the DC997B-B for offset binary versus 2's complement output format?

Output format is set via JP2 (MODE) jumper. For offset binary with Clock Duty Cycle Stabilizer off, connect JP2 to GND. For offset binary with stabilizer on, connect JP2 to 1/3. For 2's complement (default for LTC2241-12), connect JP2 to VDD. Configuration must match the LTC2241-12's internal register settings and PScope software alignment (e.g., Alignment: 15).

Can the DC997B-B be used without the DC890B data capture board?

Yes - the DC997B-B provides LVDS parallel digital outputs on J2 (pins 8–46 and 56–82) compatible with logic analyzers or custom FPGA-based acquisition systems using short 100-pin ribbon cables. However, USB-based control, real-time FFT visualization, and automated configuration require the DC890B and PScope software. Standalone use demands external clock generation, power sequencing, and LVDS-level signal capture capability.