ADS8167 8-channel 16-bit 500kSPS SAR ADC with direct sensor interface

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 × V_REF 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

ADS8167	ADS8166	ADS8168	ADS8331	ADS8332	ADS8344
16	16	16	16	16	16
500	250	1000	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
6.55 \| 1ku	4.05 \| 1ku	9.95 \| 1ku	5.25 \| 1ku	5.00 \| 1ku	8.40 \| 1ku
	15	30	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 Enhanced SPI	Comparator Enhanced SPI	Comparator	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

ADS8167 (ACTIVE)

8-channel 16-bit 500kSPS SAR ADC with direct sensor interface

Description

Features

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