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LTC2448CUHF from LINEAR

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LTC2448CUHF

Manufacturer: LINEAR, LT

24-Bit High Speed 8-/16-Channel Delta Sigma ADCs with Selectable Speed/Resolution

Partnumber Manufacturer Quantity Availability
LTC2448CUHF LINEAR, LT 369 In Stock

Description and Introduction

24-Bit High Speed 8-/16-Channel Delta Sigma ADCs with Selectable Speed/Resolution The LTC2448CUHF is a high-performance 24-bit delta-sigma ADC (Analog-to-Digital Converter) manufactured by Linear Technology (now part of Analog Devices). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Resolution:** 24-bit  
- **Channels:** 8 differential or 16 single-ended inputs  
- **Input Voltage Range:** ±VREF (programmable)  
- **Reference Voltage:** External (2.5V typical)  
- **Sampling Rate:** Programmable (3.5Hz to 800Hz)  
- **Noise Performance:** 0.5μVRMS at 3.5Hz, 6μVRMS at 800Hz  
- **INL (Integral Non-Linearity):** ±2ppm max  
- **DNL (Differential Non-Linearity):** ±1ppm max  
- **Power Supply:** 2.7V to 5.5V  
- **Power Consumption:** 1.5mA (typical)  
- **Interface:** SPI-compatible serial interface  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 38-Lead QFN (5mm × 7mm)  

### **Descriptions:**
The LTC2448CUHF is a high-precision, low-noise, multi-channel ADC designed for applications requiring high accuracy and flexibility. It features a delta-sigma architecture with a programmable digital filter, allowing trade-offs between speed and resolution. The device supports both differential and single-ended inputs, making it suitable for industrial, medical, and instrumentation applications.

### **Features:**
- **High Resolution & Accuracy:** 24-bit no missing codes, ±2ppm INL.  
- **Flexible Input Configurations:** 8 differential or 16 single-ended channels.  
- **Programmable Speed/Noise Trade-off:** Adjustable conversion rate (3.5Hz to 800Hz).  
- **Low Noise:** 0.5μVRMS noise at low speeds.  
- **Internal Oscillator:** No external clock required.  
- **SPI Interface:** Easy interfacing with microcontrollers.  
- **Low Power Consumption:** 1.5mA typical.  
- **Wide Supply Range:** Operates from 2.7V to 5.5V.  
- **Robust Packaging:** 38-lead QFN for high-density PCB designs.  

This ADC is ideal for precision measurement applications such as weigh scales, temperature sensing, and data acquisition systems.

Application Scenarios & Design Considerations

24-Bit High Speed 8-/16-Channel Delta Sigma ADCs with Selectable Speed/Resolution

Alternative Part Number

  • ADS1256IDBR --: 24-bit delta-sigma ADC with similar resolution and SPI interface, widely available and pin-compatible in function for many precision measurement designs.
  • AD7190BRUZ --: 24-bit sigma-delta ADC with low noise and integrated PGA, suitable replacement for high-resolution sensor applications.
  • MCP3428-E/SL --: 16-bit multi-channel delta-sigma ADC with I2C interface, lower resolution but a feasible alternative for less demanding precision applications.
  • AD7176-2BRUZ --: 24-bit sigma-delta ADC with similar high-resolution performance and SPI interface, suitable replacement from the same analog family.

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