Octal, Simultaneous Sampling, 16-Bit Analog-to-Digital Converter
Product details
Parameters
Package | Pins | Size
Features
- Simultaneously Sample Four/Eight Channels
- Selectable Operating Modes:
High-Speed: 52kSPS Data Rate, 31mW/ch
Low-Power: 10kSPS Data Rate, 7mW/ch - AC Performance:
25kHz Bandwidth
97dB SNR
-105dB THD - DC Performance:
2µV/°C Offset Drift
2ppm/°C Gain Drift - Digital Filter:
Linear Phase Response
Passband Ripple: ±0.005dB
Stop Band Attenuation: 100dB - Selectable SPI or Frame Sync Serial Interface
- Simple Pin-Driven Control
- Low Sampling Aperture Error
- Specified from -40°C to +105°C
- Analog Supply: 5V
- I/O Supply: 1.8V to 3.3V
- Digital Core Supply: 1.8V
- APPLICATIONS
- 3-Phase Power Monitors
- Defibrillators and ECG Monitors
- Coriolis Flow Meters
- Vibration/Modal Analysis
PowerPAD is a trademark of Texas Instruments.
SPI is a trademark of Motorola, Inc.
Description
The ADS1174 (quad) and ADS1178 (octal) are multiple delta-sigma (ΔΣ) analog-to-digital converters (ADCs) with data rates up to 52k samples-per-second (SPS), which allow synchronous sampling of four and eight channels. These devices use identical packages, and are also compatible with the high-performance 24-bit ADS1274 and ADS1278, permitting drop-in upgrades.
The delta-sigma architecture offers near ideal 16-bit ac performance (97dB SNR, -105dB THD, 1LSB linearity) combined with 0.005dB passband ripple and linear phase response.
The high-order, chopper-stabilized modulator achieves very low drift (2µV/°C offset, 2ppm/°C gain) and low noise (1LSBPP). The on-chip finite impulse response (FIR) filter provides a usable signal bandwidth up to 90% of the Nyquist rate with 100dB of stop band attenuation while suppressing modulator and signal out-of-band noise.
Two operating modes allow for optimization of speed and power: High-speed mode (31mW/Ch at 52kSPS), and Low-power mode (7mW/Ch at 10kSPS).
A SYNC input control pin allows the device conversions to be started and synchronized to an external event. SPI and Frame-Sync serial interfaces are supported. The device is fully specified over the extended industrial range (40°C to +105°C) and is available in an HTQFP-64 PowerPAD package.
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | Quad/Octal, Simultaneous Sampling, 16-Bit Analog-to-Digital Converters datasheet (Rev. B) | Sep. 12, 2008 |
| Application notes | Digital Filter Types in Delta-Sigma ADCs | Jun. 27, 2017 | |
| Application notes | How delta-sigma ADCs work, Part 1 (Rev. A) | Sep. 19, 2016 | |
| White papers | Voltage-reference impact on total harmonic distortion | Aug. 01, 2016 | |
| User guides | ADS1x7xEVM User's Guide (Rev. A) | Jan. 04, 2016 | |
| More literature | Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs | Mar. 19, 2015 | |
| Application notes | How delta-sigma ADCs work, Part 2 | Nov. 09, 2011 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and transformer-coupled (...)
Description
ADCPro™ is a modular software system for evaluating analog-to-digital converters (ADCs) without the need for expensive logic analyzers and complex analysis routines. Used alone it is suitable for performing analysis on data sets captured from ADC testing; when paired with a Texas Instruments (...)
Features
ADCPro software from Texas Instruments will simplify the tasks of collecting and analyzing ADC data, and ease evaluation. With it, you can easily set up an evaluation system that may not exactly replicate the manufacturer's system, but still arrive at meaningful results that can be compared to (...)
Description
The ADS1178EVM-PDK is a complete evaluation/demonstration kit, which combines ADS1178EVM with the DSP-based MMB0 motherboard. The motherboard and ADCPro™ evaluation software are supplied for use with a personal computer running Microsoft™ Windows XP or Windows 7 operating systems. This (...)
Features
- Easy-to-use evaluation software for Microsoft™ Windows XP and Windows 7
- Built-in analysis tools including scope, FFT, and histogram displays
- Data collection to text files
- Complete control of board settings
- Easily expandable with new analysis plug in tools from Texas Instruments
Companion power devices
- (...)
Description
- The ADS1x7x Excel calculator tool provides the user with several easy-to-use tools to simplify the configuration of ADS1x7x devices. The tool helps the user understand different settings and operating modes that aid in optimizing a design with ADS1x7x wide-bandwidth analog-to-digital converters (...)
Features
- ADC code conversions
- Digital filter plot
- Daisy-chain configuration
- SNR estimator
Software development
Linux Mainline Status
(...)
Design tools & simulation
Features
- Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
- Noise calculations
- Common unit translation
- Solves common amplifier circuit design problems
- Gain selections using standard resistors
- Filter configurations
- Total noise for common amplifier configurations
- (...)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| HTQFP (PAP) | 64 | View options |
Ordering & quality
Support & training
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Training series
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Nuts and Bolts of the Delta-Sigma Converter
Delta-sigma converters are ideal for converting signals over a wide range of frequencies from DC to several megahertz with very high resolution results. In a de
