ADS8168 8-channel 16-bit 1MSPS SAR ADC with easy-to-drive analog inputs | TI.com

ADS8168 (ACTIVE)

8-channel 16-bit 1MSPS SAR ADC with easy-to-drive analog inputs

 

Description

The ADS816x is a family of 16-bit, 8-channel, high-precision successive approximation register (SAR) analog-to-digital converters (ADCs) operating from a single 5-V supply with a 1-MSPS (ADS8168),
500-kSPS (ADS8167), and 250-kSPS (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 simplifies data processing with an enhanced channel sequencer that reduces software complexity.

The ADS816x features a digital window comparator with programmable high and low alarm thresholds with hysteresis per analog input channel. The single op-amp solution with programmable alarm thresholds enables low power, low cost, and smallest form-factor applications.

Features

  • Compact Low-Power Data Acquisition System:
    • MUX Breakout Enables Single External Driver Amplifier
    • Single-Supply Operation
    • 16-Bit SAR ADC
    • Low Drift Integrated Reference and Buffer
    • 0.5 × VREF Output for Analog Input DC Biasing
  • Excellent AC and DC Performance:
    • SNR: 92-dB, THD: –110-dB
    • INL: ±0.3-LSB, 16-Bit No Missing Codes
  • Low Leakage Multiplexer With Sequencer:
    • Multiple Channel Sequencing Options:
      • Manual Mode, On-the-Fly Mode, Auto Sequence Mode, Custom Channel Sequencing
    • Early Switching Enables Direct Sensor Interface
    • Fast Response Time With On-the-Fly Mode
  • System Monitoring Features:
    • Per Channel Programmable Window Comparator
    • Alert Output for MCU Interrupt
    • False Trigger Avoidance With Programmable Hysteresis
  • Enhanced-SPI Digital Interface:
    • 1-MSPS Throughput With 16-MHz SCLK
    • High-Speed, 70-MHz Digital Interface
  • Wide Temperature Range: –40°C to +125°C

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Parametrics Compare all products in Precision ADCs (<=10MSPS)

 
Resolution (Bits)
Sample Rate (Max) (kSPS)
Number of input channels
Interface
Operating temperature range (C)
Package Group
Approx. price (US$)
Power consumption (Typ) (mW)
Package size: mm2:W x L (PKG)
Architecture
Input type
Multi-channel configuration
Reference mode
Features
Input range (Max) (V)
Input range (Min) (V)
Analog voltage AVDD (Min) (V)
Analog voltage AVDD (Max) (V)
Digital supply (Min) (V)
Digital supply (Max) (V)
INL (Max) (+/-LSB)
SINAD (dB)
SNR (dB)
THD (Typ) (dB)
Rating
ADS8168 ADS8166 ADS8167 ADS8331 ADS8332 ADS8344
16     16     16     16     16     16    
1000     250     500     500     500     100    
8     8     8     4     8     8    
SPI     SPI     SPI     SPI     SPI     Serial    
-40 to 125     -40 to 125     -40 to 125     -40 to 85     -40 to 85     -40 to 85    
VQFN | 32     VQFN | 32     VQFN | 32     TSSOP | 24
VQFN | 24    
TSSOP | 24
VQFN | 24    
SSOP | 20
SSOP | 20    
9.95 | 1ku     4.05 | 1ku     6.55 | 1ku     5.25 | 1ku     5.00 | 1ku     8.40 | 1ku    
30     15       14.2     14.2     3.2    
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)     32VQFN: 25 mm2: 5 x 5 (VQFN | 32)     32VQFN: 25 mm2: 5 x 5 (VQFN | 32)     24TSSOP: 50 mm2: 6.4 x 7.8 (TSSOP | 24)
24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
24TSSOP: 50 mm2: 6.4 x 7.8 (TSSOP | 24)
24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
20SSOP: 38 mm2: 5.3 x 7.2 (SSOP | 20)
20SSOP: 52 mm2: 6 x 8.65 (SSOP | 20)    
SAR     SAR     SAR     SAR     SAR     SAR    
Pseudo-Differential
Single-Ended    
Pseudo-Differential
Single-Ended    
Pseudo-Differential
Single-Ended    
Pseudo-Differential
Single-Ended    
Pseudo-Differential
Single-Ended    
Pseudo-Differential
Single-Ended    
Multiplexed     Multiplexed     Multiplexed     Multiplexed     Multiplexed     Multiplexed    
Ext
Int    
Ext
Int    
Ext
Int    
Ext     Ext     Ext    
Comparator     Comparator
Enhanced SPI    
Comparator
Enhanced SPI    
Daisy-Chainable     Daisy-Chainable    
   
5     5     5     4.2     4.2     5.25    
0     0     0     0     0     0    
3     3     3     2.7     2.7     2.7    
5.5     5.5     5.5     5.5     5.5     5.25    
1.65     1.65     1.65