AD5763CSUZ-REEL7 Analog Devices Inc, AD5763CSUZ-REEL7 Datasheet - Page 22

• Manufacturer Part Number: AD5763CSUZ-REEL7
• Description: DAC 16BIT DUAL 5V 2LSB 32-TQFP
• Manufacturer: Analog Devices Inc

Specifications of AD5763CSUZ-REEL7

• Design Resources: High Accuracy, Bipolar Voltage Output Digital-to-Analog Conversion Using AD5763 (CN0074)
• Settling Time: 8µs
• Number Of Bits: 16
• Data Interface: Serial
• Number Of Converters: 2
• Voltage Supply Source: Dual ±
• Power Dissipation (max): 45mW
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 32-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD5763
DESIGN FEATURES
ANALOG OUTPUT CONTROL
In many industrial process control applications, it is vital that
the output voltage be controlled during power-up and during
brownout conditions. When the supply voltages change, the
output pins are clamped to 0 V via a low impedance path. To
prevent the output amp being shorted to 0 V during this time,
Transmission Gate G1 is also opened (see Figure 28). These
conditions are maintained until the power supplies stabilize
and a valid word is written to the DAC register. At this time,
G2 opens and G1 closes. Both transmission gates are also exter-
nally controllable via the reset logic ( RSTIN ) control input. For
instance, if RSTIN is driven from a battery supervisor chip, the
RSTIN input is driven low to open G1 and close G2 on power-
down or during a brownout. Conversely, the on-chip voltage
detector output ( RSTOUT ) is also available to the user to
control other parts of the system. The basic transmission
gate functionality is shown in Figure 28.
DIGITAL OFFSET AND GAIN CONTROL
The AD5763 incorporates a digital offset adjust function with
a ±16 LSB adjust range and 0.125 LSB resolution. The gain
register allows the user to adjust the AD5763 full-scale output
range. The full-scale output can be programmed to achieve full-
scale ranges of ±4.096 V, ±4.201 V, or ±4.311 V. A fine gain trim
is also provided.
VOLTAGE
CONTROL
MONITOR
AND
Figure 28. Analog Output Control Circuitry
RSTOUT
G1
G2
RSTIN
VOUTA
AGNDA
Rev. A | Page 22 of 28
PROGRAMMABLE SHORT-CIRCUIT PROTECTION
The short-circuit current, I
programmed by inserting an external resistor between the
ISCC pin and PGND. The programmable range for the current
is 500 μA to 10 mA, corresponding to a resistor range of 120 kΩ
to 6 kΩ. The resistor value is calculated by
If the ISCC pin is left unconnected, the short-circuit current
limit defaults to 5 mA. It should be noted that limiting the short
circuit current to a small value can affect the slew rate of the
output when driving into a capacitive load, therefore, the value
of short-circuit current programmed should take into account
the size of the capacitive load being driven.
DIGITAL I/O PORT
The AD5763 contains a 2-bit digital I/O port (D1 and D0).
These pins can be configured as inputs or outputs independently,
and can be driven or have their values read back via the serial
interface. The I/O port signals are referenced to DV
When configured as outputs, they can be used as control signals
to multiplexers or can be used to control calibration circuitry
elsewhere in the system. When configured as inputs, the logic
signals from limit switches can be applied to D0 and D1 and
can be read back via the digital interface.
DIE TEMPERATURE SENSOR
The on-chip die temperature sensor provides a voltage output
that is linearly proportional to the centigrade temperature scale.
Its nominal output voltage is 1.44 V at a 25°C die temperature,
varying at 3 mV/°C and giving a typical output range of 1.175 V
to 1.9 V over the full temperature range. Its low output imped-
ance and linear output simplify interfacing to temperature control
circuitry and ADCs. The temperature sensor is provided as
more of a convenience rather than a precise feature; it is intended
for indicating a die temperature change for recalibration
purposes.
R

I
60
SC
SC
, of the output amplifiers can be
CC
and DGND.