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Part: MAX545A
Category:
Data Conversion
-> DAC (Digital to Analog Converters)
Description: +5V, Serial Input, Voltage-output 14-Bit DACs
Company: Maxim Integrated Products
Datasheet: Download MAX545A datasheet File size : 784 kB
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Datasheet text preview:
19-1088; Rev 3; 12/99
+5V, Serial-Input, Voltage-Output, 14-Bit DACs
General Description
The MAX544/MAX545 are serial-input, voltage-output, 14-bit digital-to-analog converters (DACs) that operate from a single +5V supply. They provide 14-bit performance (±0.5LSB INL and ±0.9LSB DNL) over temperat u r e without any adjustments. The DAC output is unbuffered, resulting in a low supply current of 0.3mA and a low offset error of 0.6mV. The DAC output range is 0V to VREF. For bipolar operat i o n , matched scaling resistors are provided in the M A X 5 4 5 for use with an external precision op amp ( s u c h as the MAX400), generating a ±V R E F o u t p u t swing. The MAX545 also includes Kelvin-sense connections for the reference and analog ground pins to reduce layout sensitivity. A 16-bit serial word is used to load data into the DAC latch. The 10MHz, 3-wire serial interface is compatible with SPITM/QSPITM/MICROWIRETM, and it also interfaces directly with optocouplers for applications requiring isolation. A power-on reset circuit clears the DAC output to 0V (unipolar mode) when power is initially applied. The MAX544 is available in 8-pin plastic DIP and SO packages. The MAX545 is available in 14-pin plastic DIP and SO packages. o +5V Single-Supply Operation o Low Power: 1.5mW o 1µs Settling Time o Unbuffered Voltage Output Directly Drives 60k Loads o SPI/QSPI/MICROWIRE-Compatible Serial Interface o Power-On Reset Circuit Clears DAC Output to 0V (unipolar mode) o Schmitt-Trigger Inputs for Direct Optocoupler Interface o Pin-Compatible 16-Bit Upgrades (MAX541/MAX542)
Features
o Full 14-Bit Performance Without Adjustments
MAX544/MAX545
Ordering Information
PART MAX544ACPA MAX544BCPA MAX544ACSA MAX544BCSA TEMP. RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C PIN-PACKAGE 8 Plastic DIP 8 Plastic DIP 8 SO 8 SO INL (LSB) ±1/2 ±1 ±1/2 ±1
Applications
Digital Offset and Gain Adjustment Instrumentation Industrial Process Control Automated Test Equipment Data-Acquisition Systems
Ordering Information continued at end of data sheet.
Functional Diagrams
VDD RFB RFB INV
Pin Configurations
TOP VIEW
REFF REFS
MAX545
RINV
RFB 1 OUT 2 14 VDD 13 INV
14-BIT DAC
OUT AGNDF
OUT 1 AGND 2 REF 3 CS 4
8 VDD
AGNDF 3 AGNDS 4 REFS 5
MAX545
12 DGND 11 LDAC 10 DIN 9 N.C. 8 SCLK
MAX544
7 DGND 6 DIN 5 SCLK
REFF 6 CS 7
CS LDAC SCLK DIN
DATA LATCH CONTROL LOGIC SERIAL INPUT REGISTER DGND
AGNDS
DIP/SO
DIP/SO
Functional Diagrams continued at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. ________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.
+5V, Serial-Input, Voltage-Output, 14-Bit DACs MAX544/MAX545
ABSOLUTE MAXIMUM RATINGS
VDD to DGND ..-0.3V to +6V CS, SCLK, DIN, LDAC to DGND ......-0.3V to +6V REF, REFF, REFS to AGND ......-0.3V to (VDD + 0.3V) AGND, AGNDF, AGNDS to DGND .....-0.3V to +0.3V OUT, INV to AGND DGND ......-0.3V to VDD RFB to AGND DGND.........-6V to +6V Maximum Current into Any Pin...........50mA Continuous Power Dissipation (TA = +70°C) 8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) .....727mW 8-Pin SO (derate 5.88mW/°C above +70°C) ........471mW 14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) ...800mW 14-Pin SO (derate 8.33mW/°C above +70°C) ......667mW 14-Pin Ceramic SB (derate 10.00mW/°C above +70°C...800mW Operating Temperature Ranges MAX544 _C_ A/MAX545_C_D ......0°C to +70°C MAX544 _E_ A/MAX545_E_D....-40°C to +85°C MAX545BMJD .......-55°C to +125°C Storage Temperature Range .....-65°C to +150°C Lead Temperature (soldering, 10s) .........+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 ± 5%, VREF = +2.5V, AGND = DGND = 0, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN 14 MAX54_A MAX54_B ±0.15 ±0.15 ±0.15 ±0.05 ±5 ±0.1 ROUT (Note 2) MAX545 MAX545 BZSTC PSR VREF RREF MAX545 4.75V VDD 5.25V (Note 3) Unipolar mode MAX545, bipolar mode 2.0 11.5 9.0 25 1 10 10 ±0.5 ±1.0 3.0 RFB/RINV Ratio error 6.25 1.0 ±0.03 ±10 ±0.5 ±1 ±0.9 ±0.6 TYP MAX UNITS Bits LSB LSB mV ppm/°C LSB ppm/°C k STATIC PERFORMANCE--ANALOG SECTION (RL = ) Resolution N Integral Nonlinearity Differential Nonlinearity Zero-Code Offset Error Zero-Code Tempco Gain Error (Note 1) Gain-Error Tempco DAC Output Resistance Bipolar Resistor Matching Bipolar Zero Offset Error Bipolar Zero Tempco Power-Supply Rejection REFERENCE INPUT Reference Input Range Reference Input Resistance (Note 4) INL DNL ZSE ZSTC VDD = 5V Guaranteed monotonic
%
LSB ppm/°C LSB V k
DYNAMIC PERFORMANCE--ANALOG SECTION (RL = , unipolar mode) Voltage-Output Slew Rate SR CL = 10pF (Note 5) Output Settling Time DAC Glitch Impulse Digital Feedthrough To ± /2LSB of FS, CL = 10pF Major-carry transition Code = 0000 hex; CS = VDD; LDAC = 0V; SCLK, DIN = 0V to VDD levels
1
V/µs µs nVs nVs
2
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+5V, Serial-Input, Voltage-Output, 14-Bit DACs
ELECTRICAL CHARACTERISTICS (continued)
(VDD = +5V ± 5%, VREF = +2.5V, AGND = DGND = 0, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER Reference -3dB Bandwidth Reference Feedthrough Signal-to-Noise Ratio Reference Input Capacitance SNR CIN Code = 0000 hex Code = FFFC hex 2.4 0.8 VIN = 0 (Note 6) 0.40 4.75 0.3 1.5 5.25 1.1 ±1 10 SYMBOL BW CONDITIONS Code = FFFC hex Code = 0000 hex, VREF = 1Vp-p at 100kHz MIN TYP 1 1 83 75 120 MAX UNITS MHz mVp-p dB pF
MAX544/MAX545
DYNAMIC PERFORMANCE--REFERENCE SECTION
STATIC PERFORMANCE--DIGITAL INPUTS Input High Voltage Input Low Voltage Input Current Input Capacitance Hysteresis Voltage POWER SUPPLY Positive Supply Range Positive Supply Current Power Dissipation VDD IDD PD V mA mW VIH VIL IIN CIN VH V V µA pF V
TIMING CHARACTERISTICS
(VDD = +5V ± 5%, VREF = +2.5V, AGND = DGND = 0, CMOS inputs, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER SCLK Frequency SCLK Pulse Width High SCLK Pulse Width Low CS Low to SCLK High Setup CS High to SCLK High Setup SCLK High to CS Low Hold SCLK High to CS High Hold DIN to SCLK High Setup DIN to SCLK High Hold LDAC Pulse Width CS High to LDAC Low Setup VDD High to CS Low (power-up delay) Note 1: Note 2: Note 3: Note 4: Note 5: Note 6: SYMBOL fSCLK tCH tCL tCSS0 tCSS1 tCSH0 tCSH1 tDS tDH tLDAC tLDACS MAX545 MAX545 (Note 6) (Note 6) 45 45 45 45 30 45 40 0 50 50 20 CONDITIONS MIN TYP MAX 10 UNITS MHz ns ns ns ns ns ns ns ns ns ns µs
Gain Error tested at VREF = 2.0V, 2.5V, and 3.0V. ROUT tolerance is typically ±20%. Min/max range guaranteed by gain-error test. Operation outside min/max limits will result in degraded performance. Reference input resistance is code dependent, minimum at 8554 hex. Slew-rate value is measured from 0% to 63%. Guaranteed by design. Not production tested.
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