1FEATURES

2• 0.0625°C Temperature Resolution

• Shutdown Mode Conserves Power Between

Temperature Reading

• SPI and MICROWIRE Bus Interface

• 5-Bump DSBGA Package Saves Space

APPLICATIONS

• System Thermal Management

• Personal Computers

• Disk Drives

• Office Electronics

• Electronic Test Equipment

KEY SPECIFICATIONS

• Supply Voltage 3.0V or 2.65V to 5.5V

• Supply Current

– Operating

– 265μA (typ)

– 520μA (max)

– Shutdown

– 3μA (typ)

• Temperature Accuracy

– −10°C to 65°C, ±1.25°C(max)

– −25°C to 110°C, ±2.1°C(max)

– −55°C to 125°C, ±3°C(max)

DESCRIPTION

The LM74 is a temperature sensor, Delta-Sigma

analog-to-digital converter with an SPI and

MICROWIRE compatible interface. The host can

query the LM74 at any time to read temperature. A

shutdown mode decreases power consumption to

less than 10 μA. This mode is useful in systems

where low average power consumption is critical.

The LM74 has 12-bit plus sign temperature resolution

(0.0625°C per LSB) while operating over a

temperature range of −55°C to +150°C.

The LM74's 3.0V to 5.5V supply voltage range, low

supply current and simple SPI interface make it ideal

for a wide range of applications. These include

thermal management and protection applications in

hard disk drives, printers, electronic test equipment,

and office electronics. The LM74 is available in the

SOIC package as well as the 5-Bump DSBGA

package.