DAC7565
www.ti.com ............................................................................................................................................... SBAS412A–FEBRUARY 2008–REVISED MARCH 2008
12-Bit, Quad Channel, Ultra-Low Glitch, Voltage Output
DIGITAL-TO-ANALOG CONVERTER with 2.5V, 2ppm/°C Internal Reference
1
FEATURES
DESCRIPTION
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Relative Accuracy: 0.5LSB
Glitch Energy: 0.15nV-s
Internal Reference:
The DAC7565 is
a
low-power, voltage-output,
four-channel, 12-bit digital-to-analog converter (DAC).
The device includes 2.5V, 2ppm/°C internal
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•
a
reference (enabled by default), giving a full-scale
output voltage range of 2.5V. The internal reference
has an initial accuracy of 0.02% and can source up to
20mA at the VREFH/VREFOUT pin. The device is
monotonic, provides very good linearity, and
minimizes undesired code-to-code transient voltages
(glitch). The DAC7565 uses a versatile 3-wire serial
interface that operates at clock rates up to 50MHz.
The interface is compatible with standard SPI™,
QSPI™, Microwire™, and digital signal processor
(DSP) interfaces.
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–
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2.5V Reference Voltage (enabled by default)
0.004% Initial Accuracy (typ)
2ppm/°C Temperature Drift (typ)
5ppm/°C Temperature Drift (max)
20mA Sink/Source Capability
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Power-On Reset to Zero-Scale or Mid-Scale
Asynchronous Clear to Zero-Scale or
Mid-Scale
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Ultra-Low Power Operation: 1mA at 5V
Wide Power-Supply Range: +2.7V to +5.5V
12-Bit Monotonic Over Temperature Range
The DAC7565 incorporates a power-on-reset circuit
that ensures the DAC output powers up at either
zero-scale or mid-scale until a valid code is written to
the device. The device contains a power-down
feature, accessed over the serial interface, that
reduces the current consumption of the device to
1.3µA at 5V. Power consumption is 2.9mW at 3V,
reducing to 1.5µW in power-down mode. The low
power consumption, internal reference, and small
footprint make this device ideal for portable,
battery-operated equipment.
Settling Time: 10µs to ±0.024% Full-Scale
Range (FSR)
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Low-Power Serial Interface with
Schmitt-Triggered Inputs: Up to 50MHz
On-Chip Output Buffer Amplifier with
Rail-to-Rail Operation
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1.8V to 5.5V Logic Compatibility
The DAC7565 is drop-in and functionally compatible
with the DAC8165 and DAC8565, and functionally
compatible with the DAC7564, DAC8164 and
DAC8564. All these devices are available in a
TSSOP-16 package.
Temperature Range: –40°C to +105°C
APPLICATIONS
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Portable Instrumentation
Closed-Loop Servo-Control
Process Control, PLCs
Data Acquisition Systems
Programmable Attenuation
PC Peripherals
IOVDD
AVDD
VREFL
DAC7565
DAC Register A
VOUTA
VOUTB
VOUTC
VOUTD
Data Buffer A
12-Bit DAC
DAC Register B
DAC Register C
DAC Register D
Data Buffer B
Data Buffer C
Data Buffer D
12-Bit DAC
12-Bit DAC
12-Bit DAC
RELATED
DEVICES
16-BIT
14-BIT
12-BIT
SYNC
SCLK
DIN
Pin and
Functionally
Compatible
Register
Control
Buffer
Control
24-Bit Shift Register
DAC8565
DAC8165
DAC7565
Power-Down
Control Logic
2.5V
Reference
Control Logic
Functionally
Compatible
DAC8564
DAC8164
DAC7564
GND
RST
RSTSEL
LDAC
ENABLE
VREFH/VREFOUT
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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SPI, QSPI are trademarks of Motorola, Inc.
Microwire is a trademark of National Semiconductor.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008, Texas Instruments Incorporated
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