Overview
The ADS1253E is a precision, wide dynamic range, delta-sigma, Analog-to-Digital (A/D) converter produced by Texas Instruments. It operates with a 24-bit resolution from a single +5V supply and is designed for high-resolution measurement applications. The delta-sigma architecture ensures 24 bits of no missing codes performance and achieves an effective resolution of 19 bits with 1.8ppm of rms noise at conversion rates up to 20kHz. This converter is particularly suited for applications requiring high accuracy and low power consumption.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Resolution | - | - | - | 24 bits | - |
| Effective Resolution | Up to 20kHz data rate | - | - | 19 bits | - |
| Noise | - | - | - | 1.8ppm | - |
| Analog Inputs | - | - | - | Four differential inputs | - |
| Integral Non-Linearity (INL) | - | - | - | 15ppm (max) | - |
| External Reference | - | 0.5V | - | 5V | - |
| Power Supply | - | +4.75V | +5V | +5.25V | VDC |
| Quiescent Current | - | 1.5mA | 2mA | - | - |
| Operating Power | - | 7.5mW | 10mW | - | - |
| Power-Down Current | - | 0.4µA | 1µA | - | - |
| Logic Family | - | - | - | CMOS | - |
| Operating Temperature Range | - | -40°C | - | 85°C | - |
Key Features
- 24-bit resolution with no missing codes
- Effective resolution of 19 bits up to 20kHz data rate
- Low noise: 1.8ppm
- Four differential analog inputs
- Integral Non-Linearity (INL): 15ppm (max)
- External reference input (0.5V to 5V)
- Power-down mode and sync mode
- Low power consumption: 8mW at 20kHz, 5mW at 10kHz
- Fully differential analog input with high common-mode rejection (98dB)
- Flexible two-wire synchronous serial interface
Applications
- Cardiac diagnostics
- Smart transmitters
- Industrial process control
- Weight scales
- Chromatography (liquid/gas)
- Portable instrumentation
- Direct thermocouple interfaces
- Blood analysis
- Infrared pyrometers
Q & A
- What is the resolution of the ADS1253E?
The ADS1253E has a 24-bit resolution with no missing codes. - What is the effective resolution at 20kHz data rate?
The effective resolution is 19 bits at 20kHz data rate. - How much noise does the ADS1253E have?
The noise level is 1.8ppm. - How many analog inputs does the ADS1253E have?
The ADS1253E has four differential analog inputs. - What is the Integral Non-Linearity (INL) of the ADS1253E?
The INL is 15ppm (max). - What is the range of the external reference input?
The external reference input range is from 0.5V to 5V. - Does the ADS1253E have power-saving modes?
Yes, it has power-down and sync modes. - How much power does the ADS1253E consume at 20kHz and 10kHz data rates?
It consumes 8mW at 20kHz and 5mW at 10kHz. - What is the operating temperature range of the ADS1253E?
The operating temperature range is from -40°C to 85°C. - In what package is the ADS1253E available?
The ADS1253E is available in an SSOP-16 package.
