TI-TMP1827.pdf

TMP1827 Single-Wire, ±0.3°C Accurate Temperature Sensor With SHA-256-HMAC

Authentication Engine, 2-kbit EEPROM

1 Features

• Single-wire interface with multi-drop shared bus

and CRC

• Bus powered with operating voltage from 1.7 V to

5.5 V

• IEC 61000-4-2 ESD for 8-kV contact discharge

• High-accuracy digital temperature sensor:

• Active current of 100-µA (typical) and shutdown

current of 1.0 µA (typical)

• 16-bit temperature resolution: 7.8125 m°C (1 LSB)

• Fast data rates of 90 kbps in overdrive speed

• Flexible user programmable short address modes

for faster device address

• SHA-256-HMAC authentication scheme

– FIPS 180-4 compliant Secure Hash

Implementation

– FIPS 198-1 compliant HMAC Implementation

size of 256-bits

– Read/write current of 95 µA/178 µA (typical)

• NIST traceable factory-programmed non erasable

64-bit identification number for device addressing

• 4 configurable open-drain digital input-output and

temperature alert

2 Applications

• Factory automation and control

• Appliances

• Medical accessories

3 Description

The TMP1827 is a high-accuracy, single-wire

compatible digital output temperature sensor with

integrated 2-kbit EEPROM and SHA-256-HMAC

authentication scheme with a wide operating

temperature range from –55°C to +150°C. The

TMP1827 provides a high accuracy of ±0.1°C

range of –20°C to +85°C. Each device comes with

a factory programmed 64-bit unique identification

number for addressing and NIST traceability. The

TMP1827 supports both standard speed for legacy

application and overdrive mode with 90-kbps data rate

for low latency communication across a wide voltage

range of 1.7 V to 5.5 V.

In the simplest mode of operation, the TMP1827

single-wire interface, with an integrated 8-kV

IEC-61000-4-2 ESD protection on the data pin,

want to have a dedicated power supply.

Package Information

PART NUMBER PACKAGE

(1) For all available packages, see the orderable addendum at

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. ADVANCE INFORMATION for preproduction products; subject to change

without notice.

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Product Folder Links: TMP1827

5 Description (cont.)

The TMP1827 implements the SHA-256-HMAC authentication engine along with key storage, for system

authentication requirements of an end equipment. The 2 kbit EEPROM on the device allows the host application

to store application specific content in block sizes of 64-bit. The memory can be write protected in page size

of 256-bits to avoid accidental data overwrite. The memory architecture enables application to optimize the bus

bandwidth when updating variables which are only few bytes while providing an optimal memory size for write

protection. The device also features mechanism for host authentication by means of authenticated memory write

Product Folder Links: TMP1827

6 Pin Configuration and Functions

Product Folder Links: TMP1827

Temperature resolution

Repeatability

±2 LSB

Temperature cycling and

hysteresis

= –40°C

= 150°C

= 25°C

4 LSB

Active Conversion time (No

Averaging)

(Figure 8-12)

Product Folder Links: TMP1827