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DAC8554

更新时间： 2024-11-06 04:38:27
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26页 1890K
描述
16-BIT, QUAD CHANNEL, ULTRALOW GLITCH, VOLTAGE OUTPUT DIGITAL-TO-ANALOG CONVERTER

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DAC8554 数据手册

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DAC8554  
SLAS431A–JUNE 2005–REVISED AUGUST 2005  
16-BIT, QUAD CHANNEL, ULTRALOW GLITCH, VOLTAGE OUTPUT  
DIGITAL-TO-ANALOG CONVERTER  
FEATURES  
DESCRIPTION  
•
•
•
•
•
•
•
•
•
Relative Accuracy: 12 LSB (Max)  
The DAC8554 is a 16-bit, quad channel, voltage  
output, digital-to-analog converter (DAC), offering  
Glitch Energy: 0.15 nV-s  
low-power operation and  
a flexible serial host  
Power Supply: +2.7 V to +5.5 V  
MicroPower Operation: 850 µA at 5 V  
16-Bit Monotonic Over Temperature  
Settling Time: 10 µs to ±0.003% FSR  
Ultra-Low AC Crosstalk: –100 dB Typ  
Power-On Reset to Zero-Scale  
interface. It offers monotonicity, good linearity, and  
exceptionally low glitch. Each on-chip precision out-  
put amplifier allows rail-to-rail output swing to be  
achieved over the supply range of 2.7 V to 5.5 V. The  
device supports a standard 3-wire serial interface  
capable of operating with input data clock frequencies  
up to 50 MHz for IOVDD = 5 V.  
On-Chip Output Buffer Amplifier With  
Rail-to-Rail Operation  
The DAC8554 requires an external reference voltage  
to set the output range of each DAC channel. Also  
incorporated into the device is a power-on reset  
circuit which ensures that the DAC outputs power up  
at zero-scale and remain there until a valid write  
takes place. The DAC8554 provides a per channel  
power-down feature, accessed over the serial  
interface, that reduces the current consumption to  
200 nA per channel at 5 V.  
•
•
Double Buffered Input Architecture  
Simultaneous or Sequential Output Update  
and Power-Down  
•
•
•
•
•
16-Channel Broadcast Capability  
Schmitt-Triggered Inputs  
SPI Compatible Serial Interface: Up to 50 MHz  
1.8 V to 5.5 V Logic Compatibility  
Available in a TSSOP-16 Package  
The low-power consumption of this device in normal  
operation makes it ideally suited to portable battery-  
operated equipment and other low-power appli-  
cations. The power consumption is 4.25 mW at 5 V,  
reducing to 4 µW in power-down mode.  
APPLICATIONS  
•
•
•
•
•
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Portable Instrumentation  
Closed-Loop Servo-Control  
Process Control  
Data Acquisition Systems  
Programmable Attenuation  
PC Peripherals  
The DAC8554 is available in a TSSOP-16 package  
with a specified operating temperature range of  
–40°C to 105°C.  
V
ref  
H
AV  
IOV  
DD  
DD  
Data  
DAC  
DAC A  
DAC D  
V
V
V
V
A
OUT  
Buffer A  
Register A  
B
C
D
OUT  
OUT  
OUT  
Data  
Buffer D  
DAC  
Register D  
18  
Buffer  
Control  
Register  
Control  
SYNC  
SCLK  
24-Bit  
Serial-to-  
Parallel Shift  
Register  
Power-Down  
Control Logic  
8
D
IN  
Resistor  
Network  
A0  
A1  
LDAC ENABLE  
V L  
ref  
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.  
Microwire is a trademark of National Semiconductor.  
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 © 2005, Texas Instruments Incorporated  
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