Overview
The ADS1252U/2K5G4 is a precision, wide dynamic range, delta-sigma Analog-to-Digital (A/D) converter produced by Texas Instruments. This 24-bit resolution converter operates from a single +5V supply and is designed for high-resolution measurement applications. The delta-sigma architecture ensures 24 bits of no missing code performance and achieves an effective resolution of 19 bits with 2.5 ppm of rms noise at conversion rates up to 40 kHz.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Resolution | 24 bits | ||||
| Effective Resolution | Up to 40 kHz data rate | 19 bits | |||
| RMS Noise | 2.5 ppm | ||||
| Integral Nonlinearity (INL) | 0.0015% (max) | ||||
| Differential Input Impedance | CLK = 16 MHz | 30 kΩ | |||
| Input Capacitance | 20 pF | ||||
| Data Rate | 41.7 kHz | ||||
| Serial Clock (SCLK) | 16 MHz | ||||
| System Clock Input (CLK) | 16 MHz | ||||
| Operating Temperature Range | –40°C | +85°C | |||
| Package Type | SO-8 |
Key Features
- 24-bit resolution with no missing codes
- Effective resolution of 19 bits up to 40 kHz data rate
- Low noise: 2.5 ppm of rms noise
- Differential inputs
- Integral Nonlinearity (INL): 0.0015% (max)
- External reference voltage (0.5V to 5V)
- Power-down mode and sync mode
- Flexible, 2-wire synchronous serial interface for low-cost isolation
Applications
- Cardiac diagnostics
- Direct thermocouple interfaces
- Blood analysis
- Infrared pyrometers
- Liquid/gas chromatography
- Precision process control
- Smart transmitters
- Weight scales
- Portable instrumentation
Q & A
- What is the resolution of the ADS1252U/2K5G4?
The ADS1252U/2K5G4 has a 24-bit resolution.
- What is the effective resolution at 40 kHz data rate?
The effective resolution is 19 bits at 40 kHz data rate.
- What is the typical RMS noise of the ADS1252U/2K5G4?
The typical RMS noise is 2.5 ppm.
- What type of inputs does the ADS1252U/2K5G4 have?
The ADS1252U/2K5G4 has differential inputs.
- What is the maximum Integral Nonlinearity (INL) of the ADS1252U/2K5G4?
The maximum INL is 0.0015%.
- What is the range of the external reference voltage?
The external reference voltage range is 0.5V to 5V.
- Does the ADS1252U/2K5G4 have power-down and sync modes?
Yes, it has both power-down and sync modes.
- What type of serial interface does the ADS1252U/2K5G4 use?
The ADS1252U/2K5G4 uses a 2-wire synchronous serial interface.
- What are some common applications of the ADS1252U/2K5G4?
Common applications include cardiac diagnostics, direct thermocouple interfaces, blood analysis, infrared pyrometers, liquid/gas chromatography, precision process control, smart transmitters, weight scales, and portable instrumentation.
- What is the operating temperature range of the ADS1252U/2K5G4?
The operating temperature range is –40°C to +85°C.
