ADS1148-Q1
Automotive 16-bit 2-kSPS ADC with PGA, reference and IDAC for precision sensor measurement
ADS1148-Q1
- Qualified for Automotive Applications
- AEC-Q100 Qualified with the Following Results:
- Temperature Grade 1: –40°C to +125°C
- HBM ESD Classification 2
- CDM ESD Classification C5
- Programmable Gain: 1 V/V to 128 V/V
- Programmable Data Rates: 5 SPS to 2 kSPS
- Single-Cycle Settling for All Data Rates
- Analog Multiplexer With 8 Independently Selectable Inputs
- Dual-Matched Programmable Excitation Current Sources: 50 µA to 1.5 mA
- Internal 2.048-V Voltage Reference
- Internal 4.096-MHz Oscillator
- Internal Temperature Sensor
- Open Sensor Detection
- Power-Supply and External Reference Monitoring
- Self and System Calibration
- 8 General-Purpose I/Os
- SPI-Compatible Serial Interface
- Analog Supply: Unipolar (2.7 V to 5.25 V) or Bipolar (±2.5 V)
- Digital Supply: 2.7 V to 5.25 V
The ADS1148-Q1 is a highly-integrated, precision, 16-bit analog-to-digital converter (ADC) that includes many integrated features to reduce system cost and component count for sensor measurement applications. The device features a low-noise, programmable gain amplifier (PGA), a precision delta-sigma (ΔΣ) ADC with a single-cycle settling digital filter, and an internal oscillator. The ADS1148-Q1 integrates a low-drift voltage reference, and two matched programmable excitation current sources (IDACs).
The device offers a fully flexible multiplexer that allows both positive and negative inputs to be selected independently. In addition, the multiplexer integrates sensor burn-out detection, voltage bias for thermocouples, system monitoring, and eight general-purpose digital I/Os (GPIOs). The PGA provides selectable gains up to 128 V/V. These features provide a complete front-end solution for temperature sensor measurement applications, including thermocouples, thermistors, and resistance temperature detectors (RTDs), and other small-signal measurements. The digital filter settles in a single cycle to support fast channel cycling when using the input multiplexer and provides data rates up to 2 kSPS. For data rates of 20 SPS or less, both the 50-Hz and 60-Hz interference are rejected by the filter.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | ADS1148-Q1 Automotive,16-Bit, 2-kSPS, Analog-to-Digital Converter with Integrated Programmable Gain Amplifier (PGA), Reference, and Oscillator datasheet (Rev. A) | PDF | HTML | 07 Sep 2016 |
Application note | Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) | PDF | HTML | 18 Mar 2024 | |
Application note | Digital Filter Types in Delta-Sigma ADCs (Rev. A) | PDF | HTML | 29 Mar 2023 | |
E-book | Fundamentals of Precision ADC Noise Analysis | 19 Jun 2020 | ||
Analog Design Journal | How delta-sigma ADCs work, Part 1 (Rev. A) | 19 Sep 2016 | ||
Analog Design Journal | How delta-sigma ADCs work, Part 2 | 09 Nov 2011 |
Design & development
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TSSOP (PW) | 28 | Ultra Librarian |
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