1 Features

? Programmable data rate:

– Up to 400 kSPS (wideband filter)

– Up to 1.067 MSPS (low-latency filter)

? Selectable digital filter:

– Wideband or low-latency

? AC accuracy with dc precision:

– Dynamic range: 97.2 dB (200 kSPS)

– THD: –110 dB

– INL: 5 ppm of FS

– Offset drift: 50 nV/°C

– Gain drift: 0.6 ppm/°C

? Power-scalable architecture:

– High-speed mode: 400 kSPS, 18.6 mW

– Low-speed mode: 50 kSPS, 3.3 mW

? Input and reference precharge buffers

? Internal or external clock

2 Applications

? Test and measurement:

– Data acquisition (DAQ)

– Shock and vibration instruments

– Acoustics and dynamic strain gauges

? Factory automation and control:

– Analog input modules

? Medical:

– Pulse oximetry

? Grid infrastructure:

– Power quality analyzer

3 Description

The ADS117L11 is a 16-bit, delta-sigma (ΔΣ), analogto-

digital converter (ADC) with data rates up to

400 kSPS using the wideband filter and up to

1067 kSPS using the low-latency filter. The device

offers an excellent combination of ac performance

and dc precision with low power consumption

(18.6 mW in high-speed mode).

The device integrates input and reference buffers

to reduce signal loading. The low-drift modulator

achieves excellent dc precision with low in-band noise

for outstanding ac performance. The power-scalable

architecture provides two speed modes to optimize

data rate, resolution, and power consumption.

The digital filter is configurable for wideband or lowlatency

operation, allowing wideband ac performance

or data throughput for dc signals to be optimized, all in

one device.

The serial interface features daisy-chain capability to

reduce the SPI I/O over an isolation barrier. Input and

output data and register settings are validated by a

cyclic-redundancy check (CRC) feature to enhance

operational reliability.

The small 3-mm × 3-mm WQFN package is designed

for limited space applications. The device is fully

specified for operation over the –40°C to +125°C

temperature range.