Description
The ADS1246, ADS1247, and ADS1248 are highly-integrated, precision, 24-bit analog-to-digital converters (ADCs). The ADS1246/7/8 feature an onboard, low-noise, programmable gain amplifier (PGA), a precision delta-sigma (ΔΣ) ADC with a single-cycle settling digital filter, and an internal oscillator. The ADS1247 and ADS1248 also provide a built-in, very low drift voltage reference with 10mA output capacity, and two matched programmable current digital-to-analog converters (DACs). The ADS1246/7/8 provide a complete front-end solution for temperature sensor applications including thermal couples, thermistors, and RTDs.
An input multiplexer supports four differential inputs for the ADS1248, two for the ADS1247, and one for the ADS1246.
View full Description in Datasheet
Device Uses
- Temperature Measurement
- RTDs, Thermocouples, and Thermistors
- Pressure Measurement
- Industrial Process Control
SPI is a trademark of Motorola, Inc.
All other trademarks are the property of their respective owners.
Features
- 24 Bits, No Missing Codes
- Data Output Rates Up to 2kSPS
- Single-Cycle Settling for All Data Rates
- Simultaneous 50/60Hz Rejection at 20SPS
- 4 Differential/7 Single-Ended Inputs (ADS1248)
- 2 Differential/3 Single-Ended Inputs (ADS1247)
- Low-Noise PGA: 48nV at PGA = 128
- Matched Current Source DACs
- Very Low Drift Internal Voltage Reference: 10ppm/°C (max)
- Sensor Burnout Detection
- 4/8 General-Purpose I/Os (ADS1247/8)
- Internal Temperature Sensor
- Power Supply and VREF Monitoring (ADS1247/8)
- Self and System Calibration
- SPIâ„¢-Compatible Serial Interface
- Analog Supply Unipolar (+2.7V to +5.25V)/Bipolar (±2.5V) Operation
- Digital Supply: +2.7V to +5.25V
- Operating Temperature –40°C to +125°C
Parametrics
| |
ADS1146 |
ADS1147 |
ADS1148 |
ADS1246 |
ADS1247 |
ADS1248 |
| Resolution(Bits) |
16 |
16 |
16 |
24 |
24 |
24 |
| Sample Rate (max) |
2kSPS |
2kSPS |
2kSPS |
2KSPS |
2KSPS |
2KSPS |
| # Input Channels |
1 |
3 |
7 |
1 |
3 |
7 |
| Interface |
Serial SPI Interface |
Serial SPI Interface |
Serial SPI Interface |
Serial SPI Interface |
Serial SPI Interface |
Serial SPI Interface |
| INL(Max)(+/-LSB) |
0.0015 |
0.0015 |
0.0015 |
0.0015 |
0.0015 |
0.0015 |
| INL (+/-)(Max)(%) |
0.00002 |
0.00002 |
0.00002 |
0.00002 |
0.00002 |
0.00002 |
| Power Consumption(Typ)(mW) |
2.3 |
2.3 |
2.3 |
2.3 |
2.3 |
2.3 |
| Architecture |
Delta-Sigma |
Delta-Sigma |
Delta-Sigma |
Delta-Sigma |
Delta-Sigma |
Delta-Sigma |
| Analog Voltage AV/DD(Min)(V) |
2.7 |
2.7 |
2.7 |
2.7 |
2.7 |
2.7 |
| Analog Voltage AV/DD(Max)(V) |
5.25 |
5.25 |
5.25 |
5.25 |
5.25 |
5.25 |
| Operating Temperature Range(°C) |
-40 to 105 |
-40 to 105 |
-40 to 105 |
-40 to 105 |
-40 to 105 |
-40 to 105 |
| Digital Supply(Min)(V) |
2.7 |
2.7 |
2.7 |
2.7 |
2.7 |
2.7 |
| Digital Supply(Max)(V) |
5.25 |
5.25 |
5.25 |
5.25 |
5.25 |
5.25 |
|
