ADS8881
18-Bit, 1-MSPS, 1-Ch SAR ADC with True-Differential Input, SPI Interface and Daisy-Chain
ADS8881
- Sample Rate: 1 MHz
- No Latency Output
- Unipolar, True-Differential Input Range:
–VREF to +VREF - Wide Common-Mode Voltage Range:
0 V to VREF with 90-dB CMRR (min) - SPI™-Compatible Serial Interface with
Daisy-Chain Option - Excellent AC and DC Performance:
- ADS8881C:
INL: ±1 LSB (typ), ±2.0 LSB (max)
DNL: ±1.0 LSB (max), 18-Bit NMC
SNR: 100 dB, THD: –115 dB - ADS8881I:
INL: ±1.5 LSB (typ), ±3.0 LSB (max)
DNL: +1.5 and –1 LSB (max), 18-Bit NMC
SNR: 100 dB, THD: –115 dB
- ADS8881C:
- Wide Operating Range:
- AVDD: 2.7 V to 3.6 V
- DVDD: 2.7 V to 3.6 V
(Independent of AVDD) - REF: 2.5 V to 5 V (Independent of AVDD)
- Operating Temperature:
ADS8881C : 0°C to +70°C
ADS8881I : –40°C to +85°C
- Low-Power Dissipation:
- 5.5 mW at 1 MSPS
- 0.55 mW at 100 kSPS
- 55 µW at 10 kSPS
- Power-Down Current (AVDD): 50 nA
- Full-Scale Step Settling to 18 Bits: 290 ns
- Packages: MSOP-10 and VSON-10
The ADS8881 is an 18-bit, 1-MSPS, true-differential input, analog-to-digital converter (ADC). The device operates with a 2.5-V to 5-V external reference, offering a wide selection of signal ranges without additional input signal scaling. The reference voltage setting is independent of, and can exceed, the analog supply voltage (AVDD).
The device offers an SPI-compatible serial interface that also supports daisy-chain operation for cascading multiple devices. An optional busy-indicator bit makes synchronizing with the digital host easy.
The device supports unipolar, true-differential analog input signals with a differential input swing of –VREF to VREF. This true-differential analog input structure allows for a common-mode voltage of any value in the range of 0 V to VREF (when both inputs are within the operating input range of –0.1 V to VREF + 0.1 V).
Device operation is optimized for very low-power operation. Power consumption directly scales with speed. This feature makes the ADS8881 excellent for lower-speed applications.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | ADS8881x 18-Bit, 1-MSPS, Serial Interface, microPower, Miniature, True-Differential Input, SAR Analog-to-Digital Converter datasheet (Rev. D) | PDF | HTML | 11 Aug 2015 |
Circuit design | Circuit for protecting low-voltage SAR ADC from electrical overstress with minim (Rev. A) | PDF | HTML | 19 Sep 2024 | |
Application note | Continuous Wave Doppler Signal Chain Designs for TI’s Ultrasound AFE (Rev. A) | PDF | HTML | 22 May 2024 | |
Application brief | Understanding and Using SAR ADC SPICE Micromodel | PDF | HTML | 23 Nov 2021 | |
E-book | Tips and tricks for designing with voltage references (Rev. A) | 07 May 2021 | ||
User guide | ADS8881EVMV2-PDK User's Guide (Rev. A) | 04 Oct 2017 | ||
User guide | ADS8881EVMV2-PDK User's Guide | 08 May 2017 | ||
White paper | Voltage-reference impact on total harmonic distortion | 01 Aug 2016 | ||
More literature | SAR ADCs for PLC Applications | 11 Feb 2016 | ||
E-book | Best of Baker's Best: Precision Data Converters -- SAR ADCs | 21 May 2015 | ||
EVM User's guide | ADS8881EVM User's Guide | 06 Jun 2013 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
ADS8881EVMV2-PDK — ADS8881 18-Bit 1MSPS Serial-Interface SAR ADC Evaluation Module V2 PDK
PSIEVM — Precision signal injector (PSI) evaluation module for testing ADC performance
The precision signal injector (PSI) is a platform for evaluating the performance of successive-approximation register (SAR) analog-to-digital converters (ADCs). The board provides a low-distortion, low-noise, 2-kHz input signal for driving the input of the ADC, and pairs with most of the (...)
REF6025EVM-PDK — REF6025 voltage reference evaluation module
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
TIPD115 — Data acquisition optimized for low distortion, low noise 18-bit 1-MSPS reference design
TIPD113 — Data acquisition, 10-kHz AC, 35-mW 18-bit 1-MSPS reference design
TIPD112 — Data Acquisition for MUX and Step Inputs, 18 bits, 1uS Full Scale Response Reference Design
TIPD116 — Data acquisition for ECG systems, discrete LEAD I ECG implementation reference design
TIPD114 — Data acquisition at 1-KHz AC, 1-mW 18-bit 1-MSPS reference design
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
VSON (DRC) | 10 | Ultra Librarian |
VSSOP (DGS) | 10 | 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
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
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