Datasheet > LNDAQ2

LNDAQ2

更新时间： 2024-10-19 12:25:07

品牌	Logo	应用领域
LINEAR_DIMENSIONS		/
页数	文件大小	规格书
1页	165K
描述
Complete Signal Acquisition, Extraction & Fusion Analysis SoC

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数据手册

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LNDAQ2 数据手册

ADVANCE DATASHEET

LNDAQ2

Complete Signal Acquisition,

Extraction & Fusion Analysis SoC

GENERAL DESCRIPTION

FEATURES

The LNDAQ2 is a complete signal interface, acquisition, extraction

and interrogation IC using the latest low power sub-threshold

instrumentation amplifiers, automatic gain control systems, high

order switched capacitor filters, and low OSR data converters.

The primary feature of the LNDAQ2 is that it represents the

lowest power solution on the market today integrating terminator,

AGC, INA, high order high and low pass filters, and precision data

converters. In fact the LNDAQ2 draws one quarter (1/4) of the

current of its nearest competitor dramatically extending battery life.

It does this by utilizing the latest technologies in subthreshold and

low power design, making obsolete many of the conventional

solutions used in competitive devices.

The LNDAQ2 includes a >90dB CMRR terminator, and a

precision INA with offsets in the uVs. The INA includes an SPI

controlled AGC capability which can gain up signals <50uV. The

LNDAQ2 can be configured in DC or AC configuration. In AC

configuration it includes a time constant accelerator to quickly

recapture the baseline if there is a saturation event.

Following the INA are a pair of switch capacitor filters. These

filters allow coefficients to be programmed through the SPI interface

and can implement a variety of filters including Bessel filters up to 8^th

order for the high pass filter (which can achieve 0.05Hz corner

frequencies) to 6^thorder low pass.

Following the filters are an analog buffer (which can be turned

off) as well as three ADCs. The first ADC is an 18 bit ΔΣ converter,

the second a 14 bit pipeline converter, and the final ADC is a 6 bit

flash converter. These three converters combined represent the ΔΣ,

however, the pipeline and flash may be used independently to save

power or increase the bandwidth of sampling.



Complete

interrogation and analysis system

Includes:

signal

acquisition,

extraction,



Common mode terminator (>90 dB)

LNDINA333A/B/C

LNDFILT8

LNDADC18



Interfaces (including probes) for all of:



Galvanic skin response

Skin impedance

Heart waveform extraction

Temperature sensing

Optional right led drive (two or three electrode

interface for heart rate extraction)



Operates from as little as 2.7V to 3.6V, 1.8V Vout

AC or DC mode instrumentation amplifier (INA)

6 & 8^thorder (LP/HP) programmable filters

<35uA average current

Signal Acquisition:



Automatic or Programmed Gain Control (AGC)

allows acquisition from multiple sites

Time Constant Accelerator for Quick Baseline

Recapture



Capable of Measuring signals <50uV even in a

noisy environment with noise in the same spectrum

Penetrates real world noise such as muscle noise,

lighting, electrode connect & disconnect, 60Hz

AGC allows multiple inputs from anywhere on the

body for physiological fusion applications

The ΔΣ, is a low OSR type using a cascade architecture and 5 bit

quantizer to minimize power consumption. OSR may be increased

to improve resolution or reduced to minimize power consumption.

The flash converter is a modern delay line design optimizing

silicon area & power consumption. The filters and dataconverters

work from 1.8V while the input stage allows signals up to 3.6V to

Three analog to digital converters (ADCs)



6 bit delay line flash ADC (<1uA typ)

Up to 14 bit pipeline ADC (<4uA typ)

Up to 18 bit low OSR ΔΣ ADC (<10uA typ – ΔΣ

includes the 6 bit and 14 bit ADCs)

be measured.



Each ADC may be put to sleep to save power

Power optimization subsystem

SPI Interface (with independent enable)

EXAMPLE APPLICATION

APPLICATIONS



Portable heart rate equipment

Wellness patch products

Paper battery powered products (<40mAH)

Portable fitness & wellness products

Physiological fusion analysis consumer devices

Non-critical diagnostics

Low bandwidth portable electronics

Vibration sensors

Figure 1 – Example application requiring nanoPOWER technology.

 Linear Dimensions Semiconductor Inc.  22620 Ricardo Rd, Cupertino CA 95014 USA  tel 312.321.1810  fax 312.321.1830  www.lineardimensions.com 

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与LNDAQ2相关器件

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LND-BA1K	LINEAR_DIMENSIONS	获取价格	ADDRESSABLE BIOSENSOR ARRAYS
LNDINA333A	LINEAR_DIMENSIONS	获取价格	INA333 Footprint Compatible Instrumentation Amplifiers (INA) use 50% Less Current
LNDINA333B	LINEAR_DIMENSIONS	获取价格	INA333 Footprint Compatible Instrumentation Amplifiers (INA) use 50% Less Current
LNDINA333C	LINEAR_DIMENSIONS	获取价格	INA333 Footprint Compatible Instrumentation Amplifiers (INA) use 50% Less Current
LND-MA32	LINEAR_DIMENSIONS	获取价格	32 Channel High Voltage Amplifier
LND-OP28	LINEAR_DIMENSIONS	获取价格	Dual 5A, 44V, BiCMOS Operational Amplifiers
LND-PA21	LINEAR_DIMENSIONS	获取价格	Dual 5 Amp 40 V Power Operational Amplifiers
LND-SA55	LINEAR_DIMENSIONS	获取价格	Pulse Width Modulated Amplifier
LNDSP16-3A	LINEAR_DIMENSIONS	获取价格	Portable Three Terminal Heart Rate Monitor
LNDSP17	LINEAR_DIMENSIONS	获取价格	Complete Physiological Monitoring System & Fusion Development Kit

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