LTC2251IUH#PBF

Product Overview

Category: Integrated Circuits (ICs)

Use: The LTC2251IUH#PBF is a high-speed, low-power 16-bit analog-to-digital converter (ADC) designed for precision measurement applications. It provides accurate conversion of analog signals into digital data with high resolution and fast sampling rates.

Characteristics: - High-speed conversion: The LTC2251IUH#PBF offers a maximum sampling rate of 100 MSPS (Mega Samples Per Second), enabling real-time data acquisition. - Low power consumption: With a typical power dissipation of only 150 mW, this ADC is suitable for battery-powered devices and energy-efficient systems. - Wide input voltage range: The LTC2251IUH#PBF can accept analog input voltages from -0.5V to +2.5V, making it compatible with a variety of signal sources. - Excellent linearity: It exhibits exceptional linearity with a maximum integral nonlinearity (INL) error of ±1 LSB (Least Significant Bit). - Small package size: This ADC is available in a compact 32-pin QFN (Quad Flat No-Lead) package, allowing for space-saving integration into electronic designs. - RoHS compliant: The LTC2251IUH#PBF is manufactured using lead-free materials and processes, meeting the Restriction of Hazardous Substances (RoHS) directive.

Packaging/Quantity: The LTC2251IUH#PBF is supplied in tape and reel packaging, with 250 units per reel.

Specifications

• Resolution: 16 bits
• Sampling Rate: Up to 100 MSPS
• Input Voltage Range: -0.5V to +2.5V
• Power Dissipation: 150 mW (typical)
• Integral Nonlinearity (INL): ±1 LSB (maximum)
• Package Type: 32-pin QFN
• RoHS Compliance: Yes

Pin Configuration

The LTC2251IUH#PBF features a 32-pin QFN package with the following pin configuration:

Pin Number | Pin Name | Description -----------|----------|------------ 1 | VREF+ | Positive Reference Voltage Input 2 | VREF- | Negative Reference Voltage Input 3 | VIN+ | Positive Analog Input 4 | VIN- | Negative Analog Input 5 | AGND | Analog Ground 6 | DGND | Digital Ground 7 | SDO | Serial Data Output 8 | SDI | Serial Data Input 9 | SCK | Serial Clock Input 10 | CS | Chip Select Input 11-14 | NC | No Connection 15-18 | D[15:12] | Parallel Data Outputs [15:12] 19-22 | D[11:8] | Parallel Data Outputs [11:8] 23-26 | D[7:4] | Parallel Data Outputs [7:4] 27-30 | D[3:0] | Parallel Data Outputs [3:0] 31 | PDWN | Power Down Input 32 | DVDD | Digital Power Supply

Functional Features

• High-speed conversion: The LTC2251IUH#PBF can perform accurate analog-to-digital conversion at a maximum rate of 100 MSPS.
• Low power consumption: It operates with low power dissipation, making it suitable for power-sensitive applications.
• Serial interface: The ADC supports a serial interface for easy integration into digital systems.
• Flexible reference voltage: The device allows for both positive and negative reference voltage inputs, enabling versatile signal conditioning.
• Power-down mode: The PDWN pin allows the ADC to enter a low-power standby mode when not in use.

Advantages and Disadvantages

Advantages: - High-speed conversion enables real-time data acquisition. - Low power consumption for energy-efficient designs. - Wide input voltage range accommodates various signal sources. - Excellent linearity ensures accurate measurement results. - Small package size saves board space. - RoHS compliant, environmentally friendly manufacturing.

Disadvantages: - Limited resolution compared to higher-end ADCs. - Requires external components for proper operation. - Higher cost compared to lower-performance ADCs.

Working Principles

The LTC2251IUH#PBF utilizes a successive approximation register (SAR) architecture to convert analog signals into digital data. It employs a sample-and-hold circuit to capture the input voltage, which is then processed by an internal SAR logic to determine the digital representation. The converted data is outputted through a serial interface or parallel outputs, depending on the configuration.

Application Field Plans

The LTC2251IUH#PBF is