MAX17843ACB datasheet(22/131 Pages) MAXIM

22 / 131 page

NAME

TYPE

FUNCTION

1, 18, 19,

26, 27, 60

N.C.

―

Not Connected. Connect to ground or leave unconnected.

2, 4, 31

AGND

Ground

Analog Ground. Connect to negative terminal of cell 1 and ground plane.

SHDNL

Input

Active-Low Shutdown Input. Drive > 1.8V to enable operation and drive < 0.6V to reset

device and place in shutdown mode. +72V tolerant. If not driven externally, this input can

be controlled solely through UART communication and software control. Bypass with a

1nF capacitor to AGND. For single-ended UART, SHDNL must be driven externally.

VAA

Power

3.3V Regulator Output Used to Supply VDDL1, VDDL2, andVDDL3. Bypass with a 1µF

capacitor to ground.

TXUN

Output

Negative Output for Upper-Port Transmitter. Driven between VDDL3 and GNDL3.

TXUP

Output

Positive Output for Upper-Port Transmitter. Driven between VDDL3 and GNDL3.

GNDL1

Ground

Digital Ground. Connect to ground plane.

VDDL1

Power

3.3V Digital Supply. Connect externally to VAA and bypass with 0.47µF capacitor to

GNDL1.

GNDL3

Ground

Ground for Upper-Port Transmitter. Connect to ground plane.

VDDL3

Power

3.3V Supply for Upper-Port Transmitter. Connect externally to VAA and bypass with

0.47µF capacitor to GNDL3.

RXUN

Input

Negative Input for Upper-Port Receiver. Tolerates ±30V.

RXUP

Input

Positive Input for Upper-Port Receiver. Tolerates ±30V. Connect to ground for single-

ended operation.

GPIO3

I/O

General-Purpose I/O 3. Driven between VDDL1 and GNDL1. 2MΩ internal pulldown.

GPIO2

I/O

General-Purpose I/O 2. Driven between VDDL1 and GNDL1. 2MΩ internal pulldown.

GPIO1

I/O

General-Purpose I/O 1. Driven between VDDL1 and GNDL1. 2MΩ internal pulldown.

GPIO0

I/O

General-Purpose I/O 0. Driven between VDDL1 and GNDL1. 2MΩ internal pulldown.

TXLP

Output

Positive Output for Lower-Port Transmitter. Driven between VDDL2 and GNDL2.

TXLN

Output

Negative Output for Lower-Port Transmitter. Driven between VDDL2 and GNDL2.

VDDL2

Power

3.3V Supply for Lower-Port Transmitter. Connect externally to VAA and bypass with

0.47µF capacitor to GNDL2.

GNDL2

Ground

Ground for Lower-Port Transmitter. Connect to ground plane.

RXLP

Input

Positive Input for Lower-Port Receiver. Tolerates ±30V. Connect to ground for single-

ended operation.

RXLN

Input

Negative Input for Lower-Port Receiver. Tolerates ±30V.

CTG

Input

Reserved for Factory use. Connect to ground.

AUXIN2

Input

Auxiliary Voltage Input 2 to Measure External Temperature. Connect to a voltage-divider

consisting of a 10kΩ pullup to THRM and 10kΩ NTC thermistor to ground. If not used,

connect to the pullup only.

AUXIN1

Input

Auxiliary Voltage Input 1 to Measure External Temperature. Connect to a voltage-divider

consisting of a 10kΩ pullup to THRM and a 10kΩ NTC thermistor to ground. If not used,

connect to the pullup only.

THRM

Power

3.3V Switched Output. Used to supply the voltage-dividers for the auxiliary inputs. The

output is enabled only during measurements, or as configured by THRMMODE[1:0].

This output can source up to 2mA.

MAX17843

12-Channel, High-Voltage Smart Sensor

Data-Acquisition Interface

www.maximintegrated.com

Maxim Integrated │ 22

Pin Description

MAX17843ACB Datasheet(PDF) 22 Page - Maxim Integrated Products

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