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LTC2421IMS from LINEAR

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LTC2421IMS

Manufacturer: LINEAR, LT

1-/2-Channel 20-Bit 碌Power No Latency Delta Sigma ADCs in MSOP-10

Partnumber Manufacturer Quantity Availability
LTC2421IMS LINEAR, LT 1070 In Stock

Description and Introduction

1-/2-Channel 20-Bit 碌Power No Latency Delta Sigma ADCs in MSOP-10 The LTC2421IMS is a high-performance, 20-bit delta-sigma analog-to-digital converter (ADC) manufactured by Linear Technology (now part of Analog Devices).  

### **Key Specifications:**  
- **Resolution:** 20 bits  
- **Input Type:** Differential  
- **Input Voltage Range:** ±VREF (up to 5V)  
- **Reference Voltage:** External (supports up to 5V)  
- **Supply Voltage:** 2.7V to 5.5V  
- **Sampling Rate:** 3.5 samples per second (typical)  
- **Noise-Free Resolution:** 20 bits at 1.7Hz output rate  
- **Power Consumption:** 200µA (typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 10-lead MSOP  

### **Descriptions and Features:**  
- **High Accuracy:** Provides 20-bit resolution with no missing codes.  
- **Low Noise:** Features an integrated digital filter with low noise performance.  
- **Flexible Power Supply:** Operates from a single 2.7V to 5.5V supply.  
- **Differential Input:** Supports true differential inputs for improved noise rejection.  
- **No Latency:** Output data is available immediately after conversion.  
- **Internal Oscillator:** Eliminates the need for an external clock.  
- **SPI-Compatible Interface:** Simple 3-wire serial interface for communication.  
- **Auto-Calibration:** Includes an internal calibration feature for offset and full-scale errors.  

The LTC2421IMS is designed for precision measurement applications such as industrial process control, instrumentation, and data acquisition systems.

Application Scenarios & Design Considerations

1-/2-Channel 20-Bit 碌Power No Latency Delta Sigma ADCs in MSOP-10

Alternative Part Number

  • ADS1115IDGS --: 16-bit delta-sigma ADC with I2C interface, similar low-power single-channel measurement function and comparable resolution, suitable drop-in for many LTC2421 applications.
  • MCP3421A0T-E/CH --: 18-bit delta-sigma ADC in SOT-23 with I2C, single-channel low-power design closely matching the LTC2421's resolution and interface.
  • AD7790BRMZ --: 16-bit low-power sigma-delta ADC with SPI interface, similar noise performance and supply range, usable as a functional substitute with minor interface changes.
  • AD7715ARZ --: 16-bit sigma-delta ADC with similar resolution and serial interface, suitable for low-frequency precision measurement applications.
  • ADS1115IDGSR --: 16-bit delta-sigma ADC with I2C interface and internal reference, widely available and easy to integrate.

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