ADT7318_15 Datasheet, PDF (1/44 Pages) Analog Devices – 0.5C Accurate Digital Temperature Sensor and Quad Voltage Output 12-/10-/8-Bit DACs

±0.5°C Accurate Digital Temperature Sensor
and Quad Voltage Output 12-/10-/8-Bit DACs
ADT7316/ADT7317/ADT7318
FEATURES
ADT7316—four 12-bit DACs
ADT7317—four 10-bit DACs
ADT7318—four 8-bit DACs
Buffered voltage output
Guaranteed monotonic by design over all codes
10-bit temperature-to-digital converter
Temperature range: −40°C to +120°C
Temperature sensor accuracy of ±0.5°C
Supply range: 2.7 V to 5.5 V
DAC output range: 0 V to 2 VREF
Power-down current : <10 μA
Internal 2.28 VREF option
Double-buffered input logic
Buffered/unbuffered reference input option
Power-on reset to 0 V
Simultaneous update of outputs (LDAC function)
On-chip rail-to-rail output buffer amplifier
I²C®-, SMBus-, SPI®-, QSPI™-, MICROWIRE™-, and DSP-
compatible 4-wire serial interface
SMBus packet error checking (PEC) compatible
16-lead QSOP
APPLICATIONS
Portable battery-powered instruments
Personal computers
Telecommunications systems
Electronic test equipment
Domestic appliances
Process control
GENERAL DESCRIPTION
The ADT7316/ADT7317/ADT7318¹combine a 10-bit
temperature-to-digital converter and a quad 12-/10-/8-bit
DAC, respectively, in a 16-lead QSOP. This 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
ADT7316/ ADT7317/ADT7318 operate from a single 2.7 V to
5.5 V supply. The output voltage of the DAC ranges from 0 V
to 2 VREF, with an output voltage settling time of 7 μs typically.
The ADT7316/ ADT7317/ADT7318 provide two serial inter-
face options, a 4-wire serial interface that is compatible with
SPI, QSPI, MICROWIRE, and DSP interface standards, and a
2-wire SMBus/I²C interface. They feature a standby mode that
is controlled via the serial interface.
PIN CONFIGURATION
V_OUT-B 1
V_OUT-A 2
V_REF-AB 3
CS 4
GND 5
V_DD 6
D+ 7
D– ⁸
ADT7316/
ADT7317/
ADT7318
TOP VIEW
(Not to Scale)
16 V_OUT-C
15 V_OUT-D
14 V_REF-CD
13 SCL/SCLK
12 SDA/DIN
11 DOUT/ADD
10 INT/INT
9 _LDAC
Figure 1.
The reference for the four DACs is derived either internally
or from two reference pins (one per DAC pair). The outputs
of all DACs may be updated simultaneously using the software
LDAC function or external LDAC pin. The ADT7316/ADT7317/
ADT7318 incorporate a power-on-reset circuit that ensures the
DAC output powers up to 0 V and remains there until a valid
write takes place.
The ADT7316/ADT7317/ADT7318 wide supply voltage range,
low supply current, and SPI-/I²C-compatible interface make
them ideal for a variety of applications, including personal
computers, office equipment, and domestic appliances.
1 _{Protected by the following U.S. patent numbers: 5,764,174; 5,867,012;}
6,097,239; 6,169,442.
Rev. B
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