Analog Devices Inc. DC1111A

Overview

DC1111A from Analog Devices (formerly Linear Technology) is a demonstration circuit board built around the LTC2753 dual 16-bit SoftSpan IOUT DAC, supporting parallel interface, six programmable output voltage ranges (0–5V, 0–10V, ±2.5V, ±5V, ±10V, –2.5V to +7.5V), and on-board LT1236 voltage reference. It enables rapid evaluation of high-precision analog output generation in industrial control and automated test equipment.

For engineers reviewing the DC1111A datasheet, DC1111A pinout, DC1111A application, or DC1111A equivalent, key considerations include its parallel 16-bit microprocessor bus interface (D0–D15), dual DAC addressability (A0/A1), span configuration via S0–S2, and support for both software-controlled (via DC590/QuickEval) and hardware-managed (MSPAN jumper) output range selection.

Technical Context

The DC1111A implements the LTC2753's full parallel communication protocol with dedicated data (D0–D15) and span (S0–S2) registers, controlled by _D/S, _WR, UPD, and READ signals. It supports independent addressing of DACA and DACB via A0/A1, and allows simultaneous or selective updates.

Hardware configuration is managed through jumpers: MSPAN selects manual vs. software span control; S0–S2 set fixed output range when MSPAN = high; VREF selects onboard LT1236 (5V) or external reference; VOSA/VOSB configure offset adjustment source per channel.

Key Specifications

Availability

DC1111A is available at Aetrix Electronics and suitable for industrial process control, automated test equipment (ATE), precision calibration systems, and laboratory instrumentation requiring stable component supply and proven evaluation platform compatibility.

Supply support for DC1111A 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. (including legacy Linear Technology products) designs high-performance analog, mixed-signal, and power management ICs for precision signal chain applications.

The DC1111A belongs to Analog Devices' demonstration circuit family, engineered specifically to accelerate evaluation and prototyping of LTC2753-based dual 16-bit SoftSpan DAC systems in high-accuracy analog output applications.

FAQ

What is the primary function of the DC1111A evaluation board?

The DC1111A evaluation board provides a complete, ready-to-use hardware platform for evaluating the LTC2753 dual 16-bit SoftSpan IOUT DAC. It includes all necessary support circuitry-onboard LT1236 reference, op-amp output buffers, jumper-configurable span and offset settings, and parallel interface connectors-enabling immediate functional validation without custom design. The DC1111A simplifies testing of all six output ranges and transient response optimization.

How does the DC1111A interface with a host system?

The DC1111A supports two interface modes: (1) USB-based control via DC590 controller and QuickEval software, which auto-loads the correct GUI and handles span/data updates; and (2) direct parallel bus connection using D0–D15, A0–A1, _WR, UPD, READ, and _D/S signals for microprocessor integration. The DC1111A does not require DC590 to operate-its shift registers are disabled when DC590 is absent, enabling native parallel access.

What output voltage ranges does the DC1111A support, and how are they selected?

The DC1111A supports six output voltage ranges: 0–5V, 0–10V, ±2.5V, ±5V, ±10V, and –2.5V to +7.5V. Selection is achieved either via software (QuickEval) when MSPAN jumper is low, or via hardware jumpers S0–S2 when MSPAN is high. The S0–S2 states map directly to binary codes defining the active span, as documented in the DC1111A Quick Start Guide Table 1.

Can the DC1111A be used without the DC590 controller?

Yes, the DC1111A can operate independently of the DC590 controller. When no DC590 is connected, its internal shift registers are disabled, exposing the native parallel interface (JP1) for direct microprocessor control. Data is written via _WR and _D/S, updated to DAC registers via UPD, and read back using READ-enabling full register-level access to both data and span configuration without proprietary hardware.

What power supplies are required to operate the DC1111A?

The DC1111A requires clean, low-noise ±15V analog supplies connected to the turret posts for the DAC output amplifiers, plus a 5V supply for digital logic and reference circuitry. By default, the 5V VCC is derived from the onboard LT1236 reference (jumper set to 5V); alternatively, it may be supplied by the DC590 (REG) or an external regulator (jumper removed). Signal and power grounds are physically separated for noise isolation.