Datasheet > LNDADC14

LNDADC14

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	159K
描述
14 Bit Pipeline ADC

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LNDADC14 数据手册

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LNDADC14

<4uA 14 Bit Pipeline ADC

GENERAL DESCRIPTION

FEATURES



2.7 to 3.6Vin operation

0 to 3.6V dynamic range

The LNDADC14 is a very low current (typical 3.5uA in 14 bit

mode and 2.7uA in 10 bit mode) analog to digital converter

developed for low bandwidth battery operated portable

electronics applications. The LNDADC14 uses the latest

techniques in low current data converter design. These newly

derived techniques obsolete many of the existing low current

implementations with respect to their power per conversation

figure of merit (FOM).

3.5uA typical current (14 bit sampling)

2.7uA typical current (10 bit sampling)

1.5 bit quantizer

Self correcting architecture

Eight (8) through fourteen (14) bit user adjustable

operation to save power

Fast startup (<100us)

<100nA in sleep mode

Operates from as little as 2.7V Vin

2.5kHz minimum sampling rate

>12 ENOB (14 bit operation)

DNL +/-0.45, INL +/-0.65



The LNDADC14 operates from 2.7 to 3.6V Vin and operates

at a 2.5kHz clock rate. The LDSADC12 features a user

settable resolution from 8 to 14 bits to optimize power savings

(for example a signal may be sampled at 8 bits until a desired

signal is found to be present and then the resolution improved

to 14 bits to improve feature accuracy at the price of current

consumption for a period of time).

SPI Interface (independently enabled)

SELF CORRECTING 1.5 BIT QUANTIZER

The LNDADC14 utilizes a 1.5 bit self correcting and fully

differential internal analysis engine making it extremely

tolerant to noise, battery glitches, and comparator

metastability. An example of this self correcting capability is

shown in Figure 1 (this is an 8 bit example).

For extremely low current applications of limited bandwidth

(<1uA) the LNDADC14 may be utilized in a wakeup and sleep

mode due to its fast startup time. The LNDADC14 utilizes

<100nA of current in sleep mode.

APPLICATIONS



Portable heart rate equipment

Portable fitness & wellness products

Non-critical diagnostics

The LNDADC14 features an ENOB of >12 in 14 bit mode and

>9 in 10 bit mode, an INL of +/-0.65 LSB and DNL of +/-0.45

LSB.

Low bandwidth portable electronics

EXAMPLE WAVEFORMS

SELF CORRECTING EXAMPLE

Figure 1 – Self correcting behavior (here shown for 8 bit operation) of the 1.5

bit quantizer illustrates the robustness of the LNDADC14 to noise or

comparator metastability errors

Figure 2 – Cycle by cycle waveforms of the LNDADC14

in 8 bit mode of operation from the internal pipeline

operation to digital output using 2.7uA.

 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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