ADS8638
- Selectable Input Range:
±10V, ±5V, ±2.5V, 0V to 10V, or
0V to 5V
Up to ±12V with External Reference - No Latent Conversions Up to 1MSPS
- Outstanding Performance:
12 Bits No Missing Codes
INL: ±0.9LSB
SNR: 71.8dB - Highly Integrated:
4- or 8-Channel Input Mux
Temperature Sensor
Internal Voltage Reference
Alarm Thresholds for Each Channel - Low Power:
14.45mW at 1MSPS
5.85mW at 0.1MSPS
Flexible Power-Down Mode - SPI™-Compatible Serial Interface
- Extended Temperature Range:
–40°C to +125°C - Small Footprint: 4mm × 4mm QFN Package
The ADS8634 and ADS8638 (ADS8634/8) are 12-bit analog-to-digital converters (ADCs) capable of measuring inputs up to ±10V at 1MSPS. Using a successive approximation register (SAR) core, these ADCs provide a sample-and-hold front-end with no latency in conversions. The ADS8634 includes an input multiplexer (mux) for measuring up to four inputs. The ADS8638 can measure up to eight inputs.
In addition to the input multiplexer, the ADS8634/8 feature an internal temperature sensor, voltage reference, and a digital comparator for setting alarm thresholds on each input; therefore, a minimal amount of external components are required. A simple SPI-compatible interface provides for communication and control. The digital supply operates from 5V all the way down to 1.8V for direct connection to a wide range of processors and controllers.
Ideal for demanding industrial measurement applications, the ADS8634/8 are fully specified over the extended industrial temperature range of –40°C to +125°C and are available in a small form-factor QFN-24 package.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | 12-Bit, 1MSPS, 4-/8-Chan, Bipolar-Input, SAR ADC w/ Software-Selectable Ranges datasheet (Rev. A) | 03 Aug 2011 | |
Application brief | Precision ADCs in Servo Drives | PDF | HTML | 22 Aug 2024 | |
EVM User's guide | ADS8638EVM-PDK User Guide (Rev. A) | 02 Feb 2016 | ||
E-book | Best of Baker's Best: Precision Data Converters -- SAR ADCs | 21 May 2015 | ||
Application note | Determining Minimum Acquisition Times for SAR ADCs, part 2 | 17 Mar 2011 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
ADS8638EVM-PDK — ADS8638 Performance Demonstration Kit
The ADS8638EVM-PDK is designed to evaluate the ADS8614, ADS8618, ADS8634, and ADS8638 analog to digital converters. These 12/16-bit, four or eight channel, SAR converters offer multiple true bipolar and unipolar ranges in addition to a variety of alarm options. An LED is installed on the EVM board (...)
ADS8638 TINA-TI Transient Reference Design (Rev. A)
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
TIDA-00119 — 12-Bit, 8 Channel, Integrated Analog Input module for Programmable Logic Controllers (PLC)
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
VQFN (RGE) | 24 | 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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