DS2740 Просмотр технического описания (PDF) - Maxim Integrated

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производитель

DS2740

High-Precision Coulomb Counter

Maxim Integrated 

www.maxim-ic.com

FEATURES

ƒ 15-Bit Bidirectional Current Measurement

(DS2740U)

ƒ 1.56μV LSB and ±51.2mV Dynamic

Range

ƒ 78μA LSB and ±2.56A Dynamic

Range with External 20mΩ Sense

Resistor (RSNS)

ƒ 156μA LSB and ±5.12A Dynamic

Range with External 10mΩ Sense

Resistor (RSNS)

ƒ 13-Bit Bidirectional Current Measurement

(DS2740BU)

ƒ 6.25μV LSB and ±51.2mV Dynamic

Range

ƒ 312μA LSB and ±2.56A Dynamic

Range with External 20mΩ Sense

Resistor (RSNS)

ƒ 625μA LSB and ±5.12A Dynamic

Range with External 10mΩ Sense

Resistor (RSNS)

ƒ Analog Input Filter (IS1, IS2) Extends

Dynamic Range for Pulse-Load

Applications

ƒ Current Accumulation Register

Resolution

ƒ 6.25μVhr (Both DS2740U and

DS2740BU)

ƒ 0.3125mAhr with External 20mΩ

RSNS

ƒ 0.6250mAhr with External 10mΩ

RSNS

ƒ Dallas 1-Wire® Interface

ƒ Unique 64-Bit Device Address

ƒ Standard and Overdrive Timings

(OVD)

ƒ Low Power Consumption:

ƒ Active Current: 65μA max

ƒ Sleep Current: 1μA max

1-Wire is a registered trademark of Dallas Semiconductor.

DS2740

High-Precision Coulomb Counter

PIN CONFIGURATION

OVD 1

8

VDD

PIO 2

SNS 3

IS2 4

7 DQ

6

VSS

5 IS1

μMAX

(DS2740U, DS2740BU)

See Table 1 for Ordering Information.

See Table 2 for Detailed Pin Descriptions.

PIN DESCRIPTION

OVD - 1-Wire Bus Speed Select

PIO - Programmable I/O Pin

SNS - Sense Resistor Input

IS2 - Current-Sense Input

IS1 - Current-Sense Input

VSS - Device Ground, Current-Sense Resistor

Return

DQ - Data Input/Output

VDD - Power-Supply Input (2.7V to 5.5V)

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051805

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