Sensitivity Response time Zero current

Resolution

Range

Linearity Overgas limit

nA/ppm in 10ppm Cl₂

t90 (s) from zero to 10ppm Cl₂ (33Ω load resistor) ppm equivalent in zero air

RMS noise (ppm equivalent) (33Ω load resistor)

ppm limit of performance warranty

ppm error at full scale, linear at zero and 10ppm Cl₂ maximum ppm for stable response to gas pulse

-600 to -1150

< 60

± 0.4

< 0.02

20

< ± 0.2

60

Lifetime

Zero drift Sensitivity drift

Operating life

ppm equivalent change/year in lab air

% change/year in lab air, monthly test

months until 80% original signal (24-month warranted)

< 0.03

< 6

> 24

Sensitivity @ -20°C Sensitivity @ 50°C

Zero @ -20°C

Zero @ 50°

% (output @ -20°C/output @ 20°C) @ 10ppm

% (output @ 50°C/output @ 20°C) @ 10ppm

ppm equivalent change from 20°C

ppm equivalent change from 20°C

70 to 90

90 to 105

< 0 to 0.1

< 0 to -1

Cross Sensitivity

H₂S sensitivity NO₂ sensitivity NO sensitivity

SO₂ sensitivity

CO sensitivity

H₂ sensitivity C₂H₄ sensitivity NH₃ sensitivity CO₂ sensitivity

% measured gas @ 20ppm H₂S

% measured gas @ 10ppm NO₂

% measured gas @ 50ppm NO

% measured gas @ 20ppm SO₂

% measured gas @ 400ppm CO

% measured gas @ 400ppm H₂

% measured gas @ 400ppm C2H4

% measured gas @ 20ppm NH₃

% measured gas @ 5% (Vol) CO₂

< -300

< 120

< 1

< -1

< 0.1

< 0.1

< 0.1

< 0.1

0

Temperature range Pressure range

Humidity range

Storage period

Load resistor

Weight

°C

kPa

% rh continuous (see note below)

months @ 3 to 20°C (stored in sealed pot)

Ω (for optimum performance)

g

-20 to 50

80 to 120

15 to 90

6

33

< 13

Interface

Communication Bus Max. Bus Speed Input Logic Levels

Absolute Max. Input Signal

Compatible with the 400 kHz I²C protocol Up to 1 MHz

High (Recessive) < 2.3 V | Low (Dominant) < 0.2 V

3.6 V

Electrical

Supply Voltage Range Supply current – Stand-By Supply current – Operating

Power Supply Conditioning ESD Protection

Bus Pins Input Capacitance

1.7 V to 3.6 V

< 5 μA

< 0.15 mA (temperature reading only)

< 2.15 mA (temperature reading + memory reading/writing) Built-In 100 nF decoupling capacitor

4 kV (human body model) - Enhanced ESD / Latch-Up protection 15 pF max.

Performance

Operational Temperature Temperature Sensor Accuracy Memory Data Retention

Memory Write Cycles

–40 °C to +85 °C

±1°C (-0°C to +70°C)

> 200 years

> 4,000,000

Data & Communication

Memory IC & I2C Address Temperature IC & I2C Address Product Data Start Address Calibration Data Start Address User Data Area

CRC Polynomial

Digital Signature Algorithm

M24128X-FCU | Device Address: R - 0xA0 / W – 0xA1 MAX31875R0TZS+T | Device Address: R - 0x90 / W – 0x91 0x0900

0x0B00

0x0D00 – 0x18FF (3,072 Bytes)

0x 01 04C1 1DB7 SHA-256