24-bit Analog fromt end (AFE) product having sigma delta ADC for weighing scale, Strain Guage, Sensor application

Overview

VS1114FE is low-power, low noise 8-channel fully differential or 16 pseudo differential inputs, 24-bit, (??) analog-to-digital converters (ADCs) with an integrated low-drift internal reference voltage and an integrated PGA with gain ranging from 1 to 128. The ADC interface data integrity features provide for a very low rate of transmission errors. The VS1114FE has very flexible power-supply options. A 2.7V to 3.6V single-supply (or ±1.8-V bipolar-supply) operation is available. It also provides an integrated low-noise low drift 2.5V reference. The on-chip oscillator or an external clock can be used as the ADC clock source. Data and control communication are handled over a 4MHz(2.4576MHz), SPI-compatible interface capable of operating with a minimum of three wires. Also, Multiple devices can share a common SPI port and synchronization can be achieved. Cyclic redundancy check (CRC) and hamming code correction is available on the interface

Key Features

Low power AFE having 24b ADC and PGA with integrated reference and internal oscillator
PGA having gain of 1, 2, 4, 8, 16, 32, 64, 128
Three power modes with output Data Rates From 1 To 19.2kSPS
High Performance:

INL: 1ppm
Reference Drift: 10ppm/°C
Gain Drift: 1ppm/°C
Offset Drift: 10 nV/°C
Noise: 185nVRMS at 10SPS at gain = 128

High CMRR: -110 dB
High accuracy, THD: -122dB
Offset and gain calibration
Programmable power down and reset
Band gap reference with 10 ppm/°C drift maximum
Internal Oscillator
Diagnostic functions
On-chip bias voltage generator
Cross-point multiplexed analog inputs (8 differential or 16 pseudo differential)
SPI Compatible Interface
-40°C to 125°C operating temperature range

Benefits

Ultra-low power delta sigma ADC
High performance
Industry best IP specifications

Applications

Weighing scale applications
Strain Gauge applications
Temperature measurement
Pressure measurement
Industrial process control
Portable instrumentation

Deliverables

Datasheet
Hard Macro (GDSII)
Characterisation Report (as applicable)
Abstract View (LEF)
Integration and Customer Support

Technical Specifications

Foundry, Node

180nm

Maturity

Silicon validated

Availability

June 2022

Request Info