Datasheet > NMUX1308BQ-Q100

NMUX1308BQ-Q100

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	330K
描述
1.5 V to 5.5 V, 8-channel analog switch multiplexer and demultiplexer with injection?-?current controlProduction

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NMUX1308BQ-Q100 数据手册

Nexperia

NMUX1308-Q100

1.5 V to 5.5 V, 8-channel analog switch multiplexer and demultiplexer with injection-current control

8. Functional description

8.1. Overview

The NMUX1308-Q100 is a general purpose analog switch with a single pole that can be configured

to select between one of eight possible connection paths (SP8T). 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 NMUX1308-Q100 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 NMUX1308-Q100 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 NMUX1308-Q100 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.

2. The isolation between the digital input pins and the V_CCpin ensures no back-powering to the

supply rail.

I_offprotection circuitry of analog inputs/outputs

The NMUX1308-Q100 implements I_offprotection circuitry on the analog switch 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 analog switch pins do not have a connection path to V_CC. If the analog switch pins

are biased when the V_CCpin is unpowered:

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

2. The isolation between the analog pins and the V_CCpin ensures no back-powering to the supply

rail.

NMUX1308_Q100

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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与NMUX1308BQ-Q100相关器件

型号	品牌	获取价格	描述	数据表
NMUX1308PW	NEXPERIA	获取价格	1.5 V to 5.5 V, 8-channel analog switch multiplexer and demultiplexer with injection?-?cur
NMUX1308PW-Q100	NEXPERIA	获取价格	1.5 V to 5.5 V, 8-channel analog switch multiplexer and demultiplexer with injection?-?cur
NMUX1309BQ	NEXPERIA	获取价格	1.5 V to 5.5 V, dual 4-channel switch analog multiplexer and demultiplexer with injection-
NMUX1309BQ-Q100	NEXPERIA	获取价格	1.5 V to 5.5 V, dual 4-channel switch analog multiplexer and demultiplexer with injection-
NMUX1309PW	NEXPERIA	获取价格	1.5 V to 5.5 V, dual 4-channel switch analog multiplexer and demultiplexer with injection-
NMUX1309PW-Q100	NEXPERIA	获取价格	1.5 V to 5.5 V, dual 4-channel switch analog multiplexer and demultiplexer with injection-
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