OBSOLETE PRODUCT — ADT7518:  Temperature Sensor, Four Channel ADC and Quad Voltage Output DAC

The ADT7518 combines a 10-bit temperature-to-digital converter, a 10-bit 4-channel ADC, and a quad 8-bit DAC, in a 16-lead QSOP package. The part also includes a band gap temperature sensor and a 10-bit ADC to monitor and digitize the temperature reading to a resolution of 0.25°C.

The ADT7518 operates from a single 2.7 V to 5.5 V supply. The input voltage range on the ADC channels is 0 V to 2.25 V, and the input bandwidth is dc. The reference for the ADC channels is derived internally. The output voltage of the DAC ranges from 0 V to VDD, with an output voltage settling time of 7 ms typical.

The ADT7518 provides two serial interface options: a 4-wire serial interface that is compatible with SPI, QSPI, MICROWIRE, and DSP interface standards, and a 2-wire SMBus/I2C interface. It features a standby mode that is controlled through the serial interface.

The reference for the four DACs is derived either internally or from a reference pin. The outputs of all DACs may be updated simultaneously using the software LDAC function or the external LDAC pin. The ADT7518 incorporates a power-on reset circuit, which ensures that the DAC output powers up to 0 V and remains there until a valid write takes place.

The ADT7518’s wide supply voltage range, low supply current, and SPI-/I2C-compatible interface make it ideal for a variety of applications, including personal computers, office equipment, and domestic appliances.

It is recommended that new designs use the ADT7519 rather than the ADT7518. The ADT7518’s internal and external temp-erature accuracy spec is only valid when not using the internal reference for the on-chip DAC. The ADT7519 does not have this limitation.

ADT7518:  Temperature Sensor, Four Channel ADC and Quad Voltage Output DAC

Product Description

The ADT7518 combines a 10-bit temperature-to-digital converter, a 10-bit 4-channel ADC, and a quad 8-bit DAC, in a 16-lead QSOP package. The part also includes a band gap temperature sensor and a 10-bit ADC to monitor and digitize the temperature reading to a resolution of 0.25°C.

The ADT7518 operates from a single 2.7 V to 5.5 V supply. The input voltage range on the ADC channels is 0 V to 2.25 V, and the input bandwidth is dc. The reference for the ADC channels is derived internally. The output voltage of the DAC ranges from 0 V to VDD, with an output voltage settling time of 7 ms typical.

The ADT7518 provides two serial interface options: a 4-wire serial interface that is compatible with SPI, QSPI, MICROWIRE, and DSP interface standards, and a 2-wire SMBus/I2C interface. It features a standby mode that is controlled through the serial interface.

The reference for the four DACs is derived either internally or from a reference pin. The outputs of all DACs may be updated simultaneously using the software LDAC function or the external LDAC pin. The ADT7518 incorporates a power-on reset circuit, which ensures that the DAC output powers up to 0 V and remains there until a valid write takes place.

The ADT7518’s wide supply voltage range, low supply current, and SPI-/I2C-compatible interface make it ideal for a variety of applications, including personal computers, office equipment, and domestic appliances.

It is recommended that new designs use the ADT7519 rather than the ADT7518. The ADT7518’s internal and external temp-erature accuracy spec is only valid when not using the internal reference for the on-chip DAC. The ADT7519 does not have this limitation.

REPLACEMENT PARTS

Rochester Electronics is the only authorized source of Analog Devices' products that have previously been discontinued or have become obsolete. Product availability should be checked directly with Rochester Electronics.

Specifications

Temp Res(°C/LSB) 0.25°C/LSB
25°C Temp Error (Deg C) �0.5Deg
Resolution 10bit
Number of Channels 4
# DAC Out Channels 4
Interface Analog
Temp Range -40 to +120
Sensor Output DSP Serial,I²C ®,MICROWIRE (TM),QSPI (TM),SMBus,SPI (TM)
沪ICP备09046653号
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