LTC1296DCN#PBF

ADCs/DACs - Special Purpose Overview

The LTC1296DCN#PBF is a single-chip 12-bit data acquisition system featuring a successive approximation A/D converter, an analog multiplexer, and a built-in sample-and-hold. It supports eight channels with configurable differential or single-ended inputs. The device operates on a single +5V supply or ±5V supplies, achieving a maximum throughput rate of 46.5ks/s. Key features include software-programmable unipolar/bipolar conversion, power shutdown capability, and a System Shutdown Output (SSO) pin for controlling external circuitry. It utilizes a synchronous half-duplex serial interface compatible with most microprocessor ports.

ADCs/DACs - Special Purpose Feature Summary

• 12-bit SAR ADC with 8-channel input multiplexer and built-in sample-and-hold
• Software programmable for unipolar/bipolar modes and MSB/LSB data sequencing
• System Shutdown Output (SSO) pin to control external signal conditioning
• Direct interface to MPU serial/parallel ports via 3-4 wire synchronous link

ADCs/DACs - Special Purpose Applications

• Industrial process control systems requiring multi-channel data acquisition
• Strain gauge bridge measurements with low-level signal conditioning
• Battery-powered instrumentation utilizing power shutdown features
• Microprocessor-based data logging and monitoring systems

ADCs/DACs - Special Purpose Procurement Notes

Verify the package type matches the design requirements; the DCN suffix indicates a 20-lead PDIP package. Confirm the temperature grade corresponds to the application environment, as the 'D' suffix specifies the commercial range (0°C to 70°C). Ensure the ordering suffix includes '#PBF' for lead-free compliance if required by assembly specifications. Cross-reference pinouts carefully when replacing older CERDIP variants.

ADCs/DACs - Special Purpose Selection Notes

Select this component for applications requiring moderate speed (46.5ks/s) and 12-bit resolution across multiple channels. The LTC1296 is distinct from the LTC1293 and LTC1294 due to its dedicated SSO pin for external power management. Consider the input impedance and source resistance limitations when designing front-end filters. Verify that the microprocessor interface timing meets the setup and hold requirements for CLK and CS signals.

ADCs/DACs - Special Purpose Part Context

This part belongs to the LTC1293/LTC1294/LTC1296 family of single-chip data acquisition systems. The LTC1296 specifically adds the System Shutdown Output feature not present in the LTC1293 or LTC1294 models. It replaces older ceramic DIP packages (like the DCJ variant) with plastic versions for cost-effective through-hole mounting. The device integrates the mux, S/H, and ADC onto one chip, reducing board space compared to discrete solutions.

ADCs/DACs - Special Purpose Replacement Considerations

The LTC1296BCN, LTC1296CCN, and LTC1296BIN are functional equivalents within the same family, differing primarily in temperature range and initial accuracy specifications. The LTC1294 is similar but lacks the SSO pin. Direct replacement requires verifying the package compatibility and ensuring the microprocessor interface logic levels match the new device's VCC.