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Part: MAX520AC
Category:
Data Conversion
-> DAC (Digital to Analog Converters)
Description: MAX520, MAX521 Quad/Octal, 2-Wire Serial 8-Bit DACs With Rail-to-rail Outputs
Company: Maxim Integrated Products
Datasheet: Download MAX520AC datasheet File size : 308 kB
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Datasheet text preview:
19-0378; Rev 3; 9/96
Quad/Octal, 2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs
_______________General Description
The MAX520/MAX521 are quad/octal, 8-bit voltage-output digital-to-analog converters (DACs) with simple 2-wire serial interfaces that allow communication between multiple devices. They operate from a single +5V supply and their reference input range includes both supply rails. The MAX521 includes rail-to-rail output buffer amplifiers for reduced system size and component count when driving loads. The MAX520's unbuffered voltage outputs reduce the device's total supply current to 4µA and provide increased accuracy at low output currents. The MAX520/MAX521 feature a serial interface and internal software protocol, allowing communication at data rates up to 400kbps. The interface, combined with the doublebuffered input configuration, allows the DAC registers to be updated individually or simultaneously. In addition, the devices can be put into a low-power shutdown mode that reduces supply current to 4µA. Power-on reset ensures the DAC outputs are at 0V when power is initially applied. The MAX520 is available in 16-pin DIP and wide SO packa g e s , as well as a space-saving 20-pin SSOP. The MAX521 comes in 20-pin DIP and 24-pin SO packages, as well as a space-saving 24-pin SSOP.
____________________________Features
o o o o Single +5V Supply Simple 2-Wire Serial Interface I2C Compatible Outputs Swing Rail to Rail: Unbuffered Outputs (MAX520) Buffered Outputs (MAX521) 1%-Accurate Trimmed Output Resistance (MAX520A) Ultra-Low 4µA Supply Current (MAX520) Individual DACs Have Separate Reference Inputs Power-On Reset Clears All Latches 4µA Power-Down Mode
MAX520/MAX521
o o o o o
______________Ordering Information
PART
TEMP. RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C
PIN-PACKAGE 16 Plastic DIP 16 Plastic DIP 16 Wide SO 16 Wide SO
TUE (LSB) 1 1 1 1
MAX520ACPE MAX520BCPE MAX520ACWE MAX520BCWE
________________________Applications
Minimum Component Analog Systems Digital Offset/Gain Adjustment Industrial Process Control Automatic Test Equipment Programmable Attenuators
Ordering Information continued at end of data sheet. MAX520 "A" grade parts include a 1%-accurate, factory-trimmed output resistance.
_______________Functional Diagrams
SDA SCL REF1 LINPUT ATCH 0 1 L UTPUT O ATCH 0 REF0 DAC0 OUT0
_________________Pin Configurations
OP VIEW
MAX520
S 8 8-BIT HIFT REGISTER
OUT1 1 OUT0 R 2
16 OUT2 O 15 R UT3 14 EF2
C ADDRESS OMPARATOR SDART/STOP T ETECTOR
LINPUT ATCH 1 1
L UTPUT O ATCH 1
DAC1
OUT1
REF1 3 A EF0 4 DGND 5 GND 6 S S CL 7 T DA 8
MAX520
13 REF3 A 12 VDD 11 D2 DECODE 4
LINPUT ATCH 2 1 LINPUT ATCH 3 1
L UTPUT O ATCH 2
DAC2
OUT2
10 AD1 9 D0 AD0 AD1 AD2
L UTPUT O ATCH 3
DAC3
OUT3
DIP/SO
REF2
REF3
Pin Configurations continued at end of data sheet.
Functional Diagrams continued at end of data sheet.
1
________________________________________________________________ Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
Quad/Octal, 2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs MAX520/MAX521
ABSOLUTE MAXIMUM RATINGS
VDD to DGND ..-0.3V to +6V VDD to AGND...-0.3V to +6V OUT_ ..........-0.3V to (VDD + 0.3V) REF_ ..-0.3V to (VDD + 0.3V) AD0, AD1, AD2..........-0.3V to (VDD + 0.3V) SCL, SDA to DGND ........-0.3V to +6V AGND to DGND.....-0.3V to +0.3V Maximum Current into Any Pin...........50mA Continuous Power Dissipation (TA = +70°C) 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW 20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C) ......762mW 24-Pin Wide SO (derate 11.76mW/°C above +70°C) ....941mW 20-Pin SSOP (derate 8.00mW/°C above +70°C) .........640mW 24-Pin SSOP (derate 8.00mW/°C above +70°C) .........640mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C)....800mW 20-Pin CERDIP (derate 11.11mW/°C above +70°C)....889mW Operating Temperature Ranges MAX520_C_ _/MAX521_C_ _ ......0°C to +70°C MAX520_E_ _/MAX521_E_ _ ...-40°C to +85°C MAX520_MJE/MAX521BMJP ......-55°C to +125°C Storage Temperature Range .....-65°C to +150°C Lead Temperature (soldering, 10sec) .....+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VDD = 5V ±10%, VREF_ = 4V, RL = (MAX520), RL = 10k (MAX521), CL = 0pF (MAX520), CL = 100pF (MAX521), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C) PARAMETER STATIC ACCURACY Resolution MAX520_ Total Unadjusted Error Differential Nonlinearity TUE DNL MAX521A MAX521B Guaranteed monotonic MAX520_ Zero-Code Error ZCE Code = 00 hex MAX521_C MAX521_E MAX521BM Zero-Code-Error Supply Rejection Zero-Code-Error Temperature Coefficient Code = 00 hex Code = 00 hex MAX520_ Full-Scale Error Code = FF hex MAX521_C MAX521_E MAX521BM Full-Scale-Error Supply Rejection Full-Scale-Error Temperature Coefficient Code = FF hex, VDD = 5V ±10% ±1 ±10 ±1 ±10 8 18 20 20 mV µV/°C mV 8 ±1 ±1.5 ±2 ±1.0 8 18 20 20 mV µV/°C mV LSB LSB Bits SYMBOL CONDITIONS MIN TYP MAX UNITS
2
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Quad/Octal, 2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs
ELECTRICAL CHARACTERISTICS (continued)
(VDD = 5V ±10%, VREF_ = 4V, RL = (MAX520), RL = 10k (MAX521), CL = 0pF (MAX520), CL = 100pF (MAX521), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C) PARAMETER REFERENCE INPUTS Input Voltage Range Input Resistance Input Current Input Capacitance RIN Code = 55 hex (Note 1) PD = 1 Code = FF hex (Note 2) (Note 3) (Note 4) 0 MAX520A MAX520B MAX521_, OUT_ = 4V, 0mA to 2.5mA Output Load Regulation MAX521_C/E, VREF_ = VDD, code = FF hex, 0µA to 500µA MAX521BM, VREF_ = VDD, code = FF hex, 0µA to 500µA Output Leakage Current DIGITAL INPUTS SCL, SDA Input High Voltage Input Low Voltage Input Current Input Hysteresis Input Capacitance DIGITAL INPUTS AD0, AD1 Input High Voltage Input Low Voltage Input Leakage DIGITAL OUTPUT SDA (Note 6) Output Low Voltage Three-State Leakage Current Three-State Output Capacitance VOL IL COUT ISINK = 3mA ISINK = 6mA VIN = 0V to VDD (Note 5) 0.4 0.6 ±10 10 V µA pF VIH VIL IIN VIN = 0V to VDD 2.4 0.8 ±10 V V µA VIH VIL IIN VHYST CIN 0V VIN VDD (Note 5) (Note 5) 0.05VDD 10 0.7VDD 0.3VDD ±10 V V µA V pF MAX521_, OUT_ = 0V to VDD, PD = 1 TA = +25°C TA = TMIN to TMAX 15.8 15.6 8.4 0.25 1.5 2.0 ±10 µA LSB 16 16 MAX520_ REF4 MAX521_ REF0REF3 MAX520_ MAX521_ 30 120 30 -70 -60 -70 VDD 16.2 16.4 16.4 k MAX520_ MAX521_ REF4 REF0REF3 0 8 4 16 VDD 12 6 24 ±10 V k µA pF SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX520/MAX521
Channel-to-Channel Isolation AC Feedthrough DAC OUTPUTS Full-Scale Output Voltage Output Resistance (Note 5)
dB dB V
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