Texas Instruments ADS8167 Handleiding
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ADS816x 8-Channel, 16-Bit, 1MSPS, SAR ADC With Direct Sensor Interface
1 Features
•Compact low-power data acquisition system:
–MUX breakout enables single external driver
amplifier
–16-bit SAR ADC
–Low-drift integrated reference and buffer
–0.5 × V
REF
output for analog input DC biasing
•Excellent AC and DC performance:
–SNR: 92dB, THD: –110dB
–INL: ±0.3LSB, 16-bit no missing codes
•Multiplexer with channel sequencer:
–Multiple channel-sequencing options:
•Manual mode, on-the-fly mode, auto
sequence mode, custom channel
sequencing
–Fast response time with on-the-fly mode
•System monitoring features:
–Per channel programmable window comparator
–False trigger avoidance with programmable
hysteresis
•Enhanced-SPI digital interface:
–1MSPS throughput with 16MHz SCLK
–High-speed, 50MHz digital interface
•Wide operating range:
–External V
REF
input range: 2.5V to 5V
–AVDD from 3V to 5.5V
–DVDD from 1.65V to 5.5V
––40°C to +125°C temperature range
2 Applications
•Chemistry, gas analyzers
•Anesthesia delivery systems
•Mixed modules (AI, AO, DI, DO)
•Intra-DC interconnects (metro)
3 Description
The ADS816x is a family of 16-bit, 8-channel,
high-precision successive approximation register
(SAR) analog-to-digital converters (ADCs). The ADCs
operate from a single 5V supply with a 1MSPS
(ADS8168), 500kSPS (ADS8167), and 250kSPS
(ADS8166) total throughput.
The input multiplexer supports extended settling time,
which makes driving the analog inputs easier. The
output of the multiplexer and ADC analog inputs are
available as device pins. This configuration allows one
ADC driver op amp to be used for all eight analog
inputs of the multiplexer.
The ADS816x features a digital window comparator
with programmable high and low alarm thresholds per
analog input channel. The single op-amp solution with
programmable alarm thresholds enables low power,
low cost, and smallest form-factor applications.
Package Information
PART NUMBERPACKAGE
(1)
PACKAGE SIZE
(2)
ADS816xRHB (VQFN, 32)5mm × 5mm
(1)For more information, see the Mechanical, Packaging, and
Orderable Information.
(2)The package size (length × width) is a nominal value and
includes pins, where applicable.
Single external op-amp
(optional)
16-bit
ADC
ALERT
SPI
4.096V
+
+
±
AIN
X
Data
HI threshold
LO threshold
MUX
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
REFIO
÷2
DVDD
AVDD
Channel
Sequencer
Enhanced-SPI
REFby2
ADS816x Block Diagram
ADS8166, ADS8167, ADS8168
SBAS817D – NOVEMBER 2017 – REVISED JUNE 2024
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
Table of Contents
1 Features............................................................................1
2 Applications.....................................................................1
3 Description.......................................................................1
4 Pin Configuration and Functions...................................3
5 Specifications..................................................................5
5.1 Absolute Maximum Ratings........................................5
5.2 ESD Ratings...............................................................5
5.3 Thermal Information....................................................5
5.4 Recommended Operating Conditions.........................6
5.5 Electrical Characteristics.............................................7
5.6 Timing Requirements..................................................9
5.7 Switching Characteristics..........................................10
5.8 Timing Diagrams.......................................................11
5.9 Typical Characteristics..............................................13
6 Detailed Description......................................................18
6.1 Overview...................................................................18
6.2 Functional Block Diagram.........................................18
6.3 Feature Description...................................................19
6.4 Device Functional Modes..........................................27
6.5 Programming............................................................35
7 Register Maps................................................................43
7.1 Interface and Hardware Configuration Registers......43
7.2 Device Calibration Registers.....................................48
7.3 Analog Input Configuration Registers.......................51
7.4 Channel Sequence Configuration Registers Map.....53
7.5 Digital Window Comparator Configuration
Registers Map.............................................................60
8 Application and Implementation..................................68
8.1 Application Information.............................................68
8.2 Typical Applications..................................................70
8.3 Layout.......................................................................72
9 Device and Documentation Support............................75
9.1 Documentation Support............................................75
9.2 Receiving Notification of Documentation Updates....75
9.3 Support Resources...................................................75
9.4 Trademarks...............................................................75
9.5 Electrostatic Discharge Caution................................75
9.6 Glossary....................................................................75
10 Revision History..........................................................76
11 Mechanical, Packaging, and Orderable
Information....................................................................77
ADS8166, ADS8167, ADS8168
SBAS817D – NOVEMBER 2017 – REVISED JUNE 2024
www.ti.com
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Copyright © 2024 Texas Instruments Incorporated
Product Folder Links: ADS8166 ADS8167 ADS8168
4 Pin Configuration and Functions
32AVDD9AIN0
1GND24 SDI
31GND10AIN1
2DECAP23 CS
30DVDD11AIN2
3REFIO22 ALERT
29RST12AIN3
4REFM21 GND
28READY13AIN4
5REFP20 ADC-INM
27SDO-1/SEQSTS14AIN5
6REFP19 MUXOUT-M
26SDO-015AIN6
7REFby218 MUXOUT-P
25SCLK16AIN7
8AIN-COM17 ADC-INP
Not to scale
Thermal
Pad
Figure 4-1. RHB Package, 32-Pin VQFN (Top View)
Table 4-1. Pin Functions
PIN
FUNCTIONDESCRIPTIONNAMENO.
ADC-INM20Analog inputNegative ADC analog input.
ADC-INP17Analog inputPositive ADC analog input.
AIN09Analog inputAnalog input channel 0.
AIN110Analog inputAnalog input channel 1.
AIN211Analog inputAnalog input channel 2.
AIN312Analog inputAnalog input channel 3.
AIN413Analog inputAnalog input channel 4.
AIN514Analog inputAnalog input channel 5.
AIN615Analog inputAnalog input channel 6.
AIN716Analog inputAnalog input channel 7.
AIN-COM8Analog inputCommon analog input.
ALERT22Digital output
Digital ALERT output; active high.
This pin is the output of the logical OR of the enabled channel ALERTs.
AVDD32Power supplyAnalog power-supply pin. Connect a 1µF capacitor from this pin to GND.
CS23Digital input
Chip-select input pin; active low.
The device starts converting the active input channel on the rising edge of CS.
The device takes control of the data bus when CS is low.
The SDO-x pins go Hi-Z when CS is high.
DECAP2Power supplyConnect a 1µF capacitor to GND for the internal power supply.
DVDD30Power supplyInterface power-supply pin. Connect a 1µF capacitor from this pin to GND.
GND1, 21, 31Power supplyGround.
www.ti.com
ADS8166, ADS8167, ADS8168
SBAS817D – NOVEMBER 2017 – REVISED JUNE 2024
Copyright © 2024 Texas Instruments Incorporated
Submit Document Feedback
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Product Folder Links: ADS8166 ADS8167 ADS8168
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | ADS8167 |
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