General Description
The MAX5258/MAX5259 are +3V/+5V single-supply,digital rial-input, voltage-output, 8-bit octal digital-to-analog converters (DACs). Internal precision buffers swing Rail-to-Rail ®, and the reference input range extends from ground to the positive supply. The +5V (MAX5258) and the +3V (MAX5259) feature a 10µA (max) shutdown mode.
The rial interface is double-buffered. A 16-bit input shift register is followed by eight 8-bit input registers and eight 8-bit DAC registers. The 16-bit rial word consists of two “don’t care” bits, three address bits,three control bits, and eight data bits. The input and DAC registers can both be updated independently or simultaneously with a single software command. The asynchronous control input (LDAC ) provides simultane-ous updating of all eight DAC registers.
The interface is compatible with SPI™, QSPI™ (CPOL =CPHA = 0 or CPOL = CPHA = 1), and MICROWIRE™.A buffered digital data output allows daisy-chaining of rial devices.
The MAX5258/MAX5259 are available in a 16-pin QSOP package.
________________________Applications
Digital Gain and Offt Adjustment Programmable Attenuators Programmable Current Sources Portable Instruments
Features
o +2.7V to +5.5V Single-Supply Operation
o Low Supply Current: 1.3mA o Low-Power Shutdown Mode
0.54mA (MAX5259)0.80mA (MAX5258)o ±1LSB DNL (max)o ±1LSB INL (max)
o Ground to V DD Reference Input Range o Output Buffer Amplifiers Swing Rail-to-Rail o 10MHz Serial Interface, SPI, QSPI (CPOL = CPHA = 0 or CPOL = CPHA = 1), and MICROWIRE-Compatible o Double-Buffered Registers for Synchronous Updating o Serial Data Output for Daisy-Chaining o Ultra-Small 16-Pin QSOP Package
+3V/+5V , Low-Power, 8-Bit Octal DACs
with Rail-to-Rail Output Buffers
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________________________________________________________________Maxim Integrated Products
1
Pin Configuration
19-1844; Rev 1; 4/01
hackOrdering Information
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
permitted
MAX5258/MAX5259
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.For pricing, delivery, and ordering information,plea contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at
M A X 5258/M A X 5259
+3V/+5V , Low-Power, 8-Bit Octal DAC with Rail-to-Rail Output Buffers 2_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS (MAX5258)
(V
= +4.5V to +5.5V, V = +4.096V, GND = 0, R = 10k Ω, C = 100pF, T = T to T , unless otherwi noted. Typical Stress beyond tho listed under “Absolute Maximum Ratings” may cau permanent damage to the device. The are stress ratings only, and functional operation of the device at the or any other conditions beyond tho indicated in the operational ctions of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
V DD -0.3V to +6V DIN, DOUT, CS , SCLK, LDAC -0.3V to +6V REF -0.3V to (V DD + 0.3V)OUT_ -0.3V to V DD Maximum Current into .50mA
Continuous Power Dissipation (T A = +70°C)
16-Pin Plastic QSOP (derate 8.3mW/°C about +70°C)...667mW Operating Temperature Range ..........................-40°C to +85°C Storage -65°C to +150°C Lead Temperature (soldering, 10s).................................+300°C
MAX5258/MAX5259
保持距离+3V/+5V , Low-Power, 8-Bit Octal DAC
with Rail-to-Rail Output Buffers
会议翻译_______________________________________________________________________________________3
ELECTRICAL CHARACTERISTICS (MAX5258) (continued)
(V DD = +4.5V to +5.5V, V REF = +4.096V, GND = 0, R L = 10k Ω, C L = 100pF, T A = T MIN to T MAX , unless otherwi noted. Typical values are at V DD = +5V and T A = +25°C.)
M A X 5258/M A X 5259
+3V/+5V , Low-Power, 8-Bit Octal DAC with Rail-to-Rail Output Buffers 4_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (MAX5259)
(V DD = +2.7V to +3.3V, V REF = +2.5V, GND = 0, R L = 10k Ω, C L = 100pF, T A = T MIN to T MAX , unless otherwi noted. Typical values are at V DD = +3V, and T A = +25°C.)
MAX5258/MAX5259
+3V/+5V , Low-Power, 8-Bit Octal DAC
with Rail-to-Rail Output Buffers
pheic
_______________________________________________________________________________________5
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ELECTRICAL CHARACTERISTICS (MAX5259) (continued)
(V DD = +2.7V to +3.3V, V REF = +2.5V, GND = 0, R L = 10k Ω, C L = 100pF, T A = T MIN to T MAX , unless otherwi noted. Typical values are at V DD = +3V, and T A = +25°C.)
TIMING CHARACTERISTICS (MAX5258)
(V REF = +4.096V, G ND = 0, C DOUT = 100pF, T A = T MIN to T MAX , unless otherwi noted. Typical values are at V DD = +5V and T A = +25°C.)
M A X 5258/M A X 5259建筑学大学排名
故事书的英文
+3V/+5V , Low-Power, 8-Bit Octal DAC with Rail-to-Rail Output Buffers 6_______________________________________________________________________________________
TIMING CHARACTERISTICS (MAX5259)
(V REF = +2.5V, G ND = 0, C DOUT = 100pF, T A = T MIN to T MAX , unless otherwi noted. Typical values are at V DD = +3V and T A = +25°C.)
Note 2:Output ttling time is measured from the 50% point of the rising edge of CS to 1/2LSB of the final value of V OUT .Note 3:Guaranteed by design, not production tested.
Note 4:If LDAC is activated prior to the rising edge of CS , it must remain low for t LDAC or longer after CS goes high.Note 5:When DOUT is not ud. If DOUT is ud, f CLK (max) is 4MHz due to SCLK to DOUT propagation delay.
nice什么意思Note 6:Serial data is clocked-out at SCLK ’s rising edge (measured from 50% of the clock edge to 20% or 80% of V DD ).Note 7:Serial data is clocked-out at SCLK ’s falling edge (measured from 50% of the clock edge to 20% or 80% of V DD ).
