Datasheet > NMUX1309BQ

NMUX1309BQ

更新时间： 2024-04-09 18:58:32

品牌	Logo	应用领域
安世 - NEXPERIA		/
页数	文件大小	规格书
23页	332K
描述
1.5 V to 5.5 V, dual 4-channel switch analog multiplexer and demultiplexer with injection-current controlProduction

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NMUX1309BQ 数据手册

Nexperia

NMUX1309

1.5 V to 5.5 V, dual 4-channel switch analog multiplexer and demultiplexer with injection-current control

8. Functional description

Table 4. Function table

H = HIGH voltage level; L = LOW voltage level; X = don’t care.

Input

Channel ON

nY0 to nZ

nY1 to nZ

nY2 to nZ

nY3 to nZ

8.1. Overview

The NMUX1309 is a general purpose analog switch with a 2 poles, each of which can be

configured to select between one of four possible connection paths (2x SP4T). Each analog

connection path is bi-directional, with similar electrical characteristics independent of the direction

of signal propagation.

8.2. Key features

Injection current control

Current injection can occur in systems where an analog voltage can experience transient spikes

due to signal propagation over long distances with high inductance. Voltage exposure above the

supply voltage will source excessive current into an analog input, which is referred to as positive

injection. Voltage exposure below the ground voltage will sink excessive current from an analog

input, which is referred to as negative injection. Both types of injection current elevate the risk of

device damage to an analog input and can introduce a large voltage error to the analog signal

itself.

The NMUX1309 mitigates both risks by integrating an injection current control circuit to divert

both positive injection and negative injection through a bypass FET that connects to GND. This

implementation minimizes any shift in the supply voltage, therefore minimizing any shift in the

device's ON Resistance, and thus minimizes changes in the measured analog voltage. The

injection current control circuit is active on all analog pins, independent of whether the channel is

selected/unselected.

1.8 V Compatible digital logic thresholds

It is common for modern systems to operate digital signals from lower voltage nodes such as 1.8

V, while operating their analog signals at higher voltage nodes such as 3.3 V or 5.0 V. To remove

the requirements for a voltage translation device, the NMUX1309 digital control pins maintain 1.8 V

logic compatible thresholds at higher operating voltages, up to 5.5 V.

I_offprotection circuitry of digital inputs

The NMUX1309 implements I_offprotection circuitry on the digital control pins, isolating those pins

from the internal circuits when the supply is unpowered (i.e., V_CC= 0 V). The ESD protection

diodes on the digital input pins do not have a connection path to V_CC. If the digital input pins are

biased when the V_CCpin is unpowered:

1. The high impedance of the digital input pins minimizes input current leakage.

NMUX1309

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 1.1 — 21 February 2024

5 / 23

1 2 3 456 7 8...23

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