Overview
The LTC1405IGN#PBF is a high-performance 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is designed to operate at speeds of up to 5 million samples per second (Msps) and features an on-chip sample-and-hold circuit, a 12-bit pipelined CMOS ADC, a low drift programmable reference, and an input programmable gain amplifier (PGA). The ADC provides a flexible analog input with a wide selection of input ranges, making it versatile for various applications.
Key Specifications
| Parameter | Description |
|---|---|
| Resolution | 12 bits |
| Sampling Rate | Up to 5 Msps |
| Analog Input Range | Differential, set by VREF and GAIN pins:
|
| Reference Voltage | On-chip or external, 2.048V or 2.5V |
| Digital Output Format | Parallel, 12-bit two’s complement with out-of-range (overflow) bit |
| Logic Supply | Separate output logic supply for direct connection to 3V components |
| Conversion Time | Three clock cycles (including 150ns conversion time) |
Key Features
- High-speed operation up to 5 Msps
- On-chip sample-and-hold circuit and 12-bit pipelined CMOS ADC
- Low drift programmable reference
- Input programmable gain amplifier (PGA) with 1x or 2x gain
- Flexible differential analog input ranges
- Parallel digital output in 12-bit two’s complement format
- Separate output logic supply for 3V components
Applications
The LTC1405IGN#PBF is suitable for a variety of high-speed data acquisition applications, including:
- Medical imaging and diagnostics
- Industrial process control and monitoring
- Aerospace and defense systems
- High-speed data acquisition systems
- Automotive and transportation systems
Q & A
- What is the maximum sampling rate of the LTC1405IGN#PBF?
The maximum sampling rate is up to 5 million samples per second (Msps).
- What is the resolution of the LTC1405IGN#PBF?
The resolution is 12 bits.
- How is the analog input range set for the LTC1405IGN#PBF?
The analog input range is set by the voltages at the VREF and GAIN pins.
- What are the possible gain settings for the PGA in the LTC1405IGN#PBF?
The gain can be set to 1x or 2x using the GAIN pin.
- What is the format of the digital output of the LTC1405IGN#PBF?
The digital output is in parallel, 12-bit two’s complement format with an out-of-range (overflow) bit.
- How many clock cycles are required for a conversion result to be available?
Three clock cycles, including a 150ns conversion time.
- Can the LTC1405IGN#PBF be used with 3V logic components?
- What types of applications is the LTC1405IGN#PBF suitable for?
High-speed data acquisition applications such as medical imaging, industrial process control, aerospace, and automotive systems.
- What is the reference voltage for the LTC1405IGN#PBF?
The reference voltage can be set using an on-chip reference or an external reference, with options for 2.048V or 2.5V.
- How does the pipelined ADC in the LTC1405IGN#PBF handle analog signals?
The analog signals are stored on capacitors as they are passed through the pipelined ADC stages.
