ADS1178
- 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.
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.
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Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | Quad/Octal, Simultaneous Sampling, 16-Bit Analog-to-Digital Converters datasheet (Rev. B) | 12 Sep 2008 | |
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 | ||
White paper | Voltage-reference impact on total harmonic distortion | 01 Aug 2016 | ||
E-book | Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs | 19 Mar 2015 | ||
Analog Design Journal | How delta-sigma ADCs work, Part 2 | 09 Nov 2011 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
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Supported products & hardware
Products
Precision ADCs
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
Supported products & hardware
Products
Precision op amps (Vos<1mV)
General-purpose op amps
Audio op amps
Transimpedance amplifiers
High-speed op amps (GBW ≥ 50 MHz)
Power op amps
Video amplifiers
Line drivers
Transconductance amplifiers & laser drivers
Fully differential amplifiers
Precision ADCs
Biosensing AFEs
High-speed ADCs (≥10 MSPS)
Receivers
Touchscreen controllers
Difference amplifiers
Instrumentation amplifiers
Audio line receivers
Analog current-sense amplifiers
Digital power monitors
Analog current-sense amplifiers with integrated shunt resistor
Digital power monitors with integrated shunt resistor
Die & wafer services
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
TINA-TI — SPICE-based analog simulation program
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
HTQFP (PAP) | 64 | Ultra Librarian |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
- Fab location
- Assembly location
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Support & training
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