DAC7565 Datasheet, PDF (1/46 Pages) Texas Instruments – 12-Bit, Quad Channel, Ultra-Low Glitch, Voltage Output DIGITAL-TO-ANALOG CONVERTER with 2.5V, 2ppm/°C Internal Reference

DAC7565
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
FEATURES
1
•234 Relative Accuracy: 0.5LSB
• Glitch Energy: 0.15nV-s
• Internal Reference:
– 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
• Power-On Reset to Zero-Scale or Mid-Scale
• Asynchronous Clear to Zero-Scale or
Mid-Scale
• Ultra-Low Power Operation: 1mA at 5V
• Wide Power-Supply Range: +2.7V to +5.5V
• 12-Bit Monotonic Over Temperature Range
• Settling Time: 10µs to ±0.024% Full-Scale
Range (FSR)
• Low-Power Serial Interface with
Schmitt-Triggered Inputs: Up to 50MHz
• On-Chip Output Buffer Amplifier with
Rail-to-Rail Operation
• 1.8V to 5.5V Logic Compatibility
• Temperature Range: –40°C to +105°C
APPLICATIONS
• Portable Instrumentation
• Closed-Loop Servo-Control
• Process Control, PLCs
• Data Acquisition Systems
• Programmable Attenuation
• PC Peripherals
DESCRIPTION
The DAC7565 is a low-power, voltage-output,
four-channel, 12-bit digital-to-analog converter (DAC).
The device includes a 2.5V, 2ppm/°C internal
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 V_REFH/V_REFOUT 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.
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.
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.
IOVDD
AVDD
DAC7565
VREFL
Data Buffer A
DAC Register A
12-Bit DAC
VOUTA
Data Buffer B
DAC Register B
12-Bit DAC
VOUTB
RELATED
DEVICES
Pin and
Functionally
Compatible
Functionally
Compatible
16-BIT
DAC8565
DAC8564
14-BIT
DAC8165
DAC8164
12-BIT
DAC7565
DAC7564
Data Buffer C
DAC Register C
12-Bit DAC
VOUTC
SYNC
SCLK
DIN
Data Buffer D
DAC Register D
12-Bit DAC
VOUTD
24-Bit Shift Register
Buffer
Control
Register
Control
Control Logic
2.5V
Reference
Power-Down
Control Logic
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.
SPI, QSPI are trademarks of Motorola, Inc.
2
Microwire is a trademark of National Semiconductor.
3
All other trademarks are the property of their respective owners.
4
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