DAC7760 Datasheet, PDF (4/63 Pages) Texas Instruments – Single-Channel, 12- and 16-Bit Programmable Current Output and Voltage Output Digital-to-Analog Converters for 4-mA to 20-mA Current Loop Applications

DAC7760, DAC8760
SBAS528B – JUNE 2013 – REVISED JUNE 2016
www.ti.com
NAME
ALARM
AVDD
AVSS
BOOST
CAP1
CAP2
CLR
CLR-SEL
CMP
DIN
DVDD
DVDD-EN
GND
GND
HART-IN
IOUT
ISET-R
LATCH
NC
REFOUT
REFIN
SCLK
SDO
THERMAL
PAD
VOUT
+VSENSE
–VSENSE
PIN
VQFN
2
36
14, 37
27
28
29
5
4
24
8
39
23
3,
12, 13, 15
25
26
16
6
1, 10, 11,
19, 20, 21,
22, 30, 31,
35, 38, 40
17
18
7
9
—
32
33
34
Pin Functions
HTSSOP
3
24
1
20
—
—
6
5
17
9
2
16
4
11, 12
18
19
13
7
I/O
DESCRIPTION
Alarm pin. Open drain output. External pullup resistor required (10 kΩ). The pin
Digital output goes low (active) when the ALARM condition is detected (open circuit, over
temperature, timeout and so forth).
Supply input Positive analog power supply.
Supply input
Negative analog power supply in dual power-supply operation. Connects to GND
in single power-supply operation.
Analog output Boost pin. External transistor connection (optional).
Analog input Connection for current output filtering capacitor (optional).
Analog input Connection for current output filtering capacitor (optional).
Digital input
Clear input. Logic high on this pin causes the part to enter CLEAR state. Active
high.
Digital input Selects the VOUT value in CLEAR state, after power-on and reset.
Analog output
External compensation capacitor connection pin (optional). Addition of the
external capacitor (connected between VOUT and this pin) improves the stability
with high capacitive loads at the VOUT pin by reducing the bandwidth of the
output amplifier, thus increasing the settling time.
Digital input
Serial data input. Data are clocked into the 24-bit input shift register on the rising
edge of the serial clock input. Schmitt-Trigger logic input.
Supply input or
output
Digital power supply. Can be input or output, depending on DVDD-EN pin.
Digital input
Internal power-supply enable pin. Connect this pin to GND to disable the internal
supply, or leave this pin unconnected to enable the internal supply. When this
pin is connected to GND, an external supply must be connected to the DVDD
pin.
Supply input Ground reference point for all digital circuitry of the device. Connect to 0 V.
Supply input Ground reference point for all analog circuitry of the device. Connect to 0 V.
Analog input Input pin for HART modulation.
Analog output Current output pin
Analog input
Connection pin for external precision resistor (15 kΩ). See the Detailed
Description section of this data sheet.
Digital input
Load DAC registers input. A rising edge on this pin loads the input shift register
data into the DAC data and control registers and updates the DAC outputs.
—
—
No connection.
14
Analog output Internal reference output. Connect to REFIN when using internal reference.
15
Analog input Reference input
8
Digital input
Serial clock input of serial peripheral interface (SPI™). Data can be transferred
at rates up to 30 MHz. Schmitt-Trigger logic input.
10
Digital output Serial data output. Data are valid on the rising edge of SCLK.
The thermal pad is internally connected to the AVSS supply. It is recommended
that the pad be thermally connected to a copper plane for enhanced thermal
performance. The pad can be electrically connected to the same potential as the
—
Supply input AVSS pin (either negative supply voltage or GND) or left electrically
unconnected provided a supply connection is made at the AVSS pin. The AVSS
pin must always be connected to either the negative supply voltage or GND,
independent of the thermal pad connection.
21
Analog output Voltage output pin. This is a buffered analog voltage output.
22
Analog input Sense pin for the positive voltage output load connection.
23
Analog input Sense pin for the negative voltage output load connection.
4
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