dac122s085eb National Semiconductor Corporation, dac122s085eb Datasheet
dac122s085eb
Related parts for dac122s085eb
dac122s085eb Summary of contents
Page 1
... DAC082S085 and the 10-bit DAC102S085. The DAC122S085 operates over the extended industrial tem- perature range of −40°C to +105°C. Pin Configuration SPI ™ trademark of Motorola, Inc. © 2007 National Semiconductor Corporation Features ■ Guaranteed Monotonicity ■ Low Power Operation ■ ...
Page 2
Ordering Information Order Numbers DAC122S085CISD DAC122S085CISDX DAC122S085CIMM DAC122S085CIMMX DAC122S085EVAL Block Diagram www.national.com Temperature Range ≤ ≤ −40°C T +105°C A ≤ ≤ LLP Tape-and-Reel −40°C T +105°C A ≤ ≤ −40°C T +105°C A ≤ ≤ MSOP Tape-and-Reel −40°C T ...
Page 3
Pin Descriptions LLP MSOP Symbol Pin No OUTA V 3 OUTB GND V 7 REFIN SYNC 10 SCLK PAD 11 (LLP only) Type Supply Power supply ...
Page 4
Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Voltage on any Input Pin Input Current at Any Pin (Note 3) Package Input Current ...
Page 5
Symbol Parameter I Output Short Circuit Current (sink) OS Continuous Output I O Current (Note 10) C Maximum Load Capacitance Output Impedance OUT REFERENCE INPUT CHARACTERISTICS Input Range Minimum Input Range Maximum VREFIN Input Impedance LOGIC INPUT ...
Page 6
A.C. and Timing Characteristics Values shown in this table are design targets and are subject to change before product release. The following specifications apply for 4047. Boldface limits apply for T Symbol Parameter f SCLK Frequency SCLK ...
Page 7
Note 9: Typical figures are 25°C, and represent most likely parametric norms. Test limits are guaranteed to National's AOQL (Average Outgoing Quality J Level). Note 10: This parameter is guaranteed by design and/or characterization and is not ...
Page 8
Transfer Characteristic Timing Diagrams www.national.com FIGURE 1. Input / Output Transfer Characteristic FIGURE 2. Serial Timing Diagram 8 20195205 20195206 ...
Page 9
Typical Performance Characteristics 4047, unless otherwise stated INL 3.0V A DNL 3.0V A INL/DNL REFIN REF A SCLK 20195252 20195254 = 3.0V A 20195256 9 ...
Page 10
INL/DNL SCLK INL/DNL vs Clock Duty Cycle at V INL/DNL vs Temperature at V www.national.com = 2.7V A 20195250 = 3.0V INL/DNL vs Clock Duty Cycle 20195224 = 3.0V INL/DNL vs Temperature at ...
Page 11
Zero Code Error vs 20195230 Zero Code Error vs. f SCLK 20195234 Zero Code Error vs. Temperature 20195236 Zero Code Error vs. V Zero Code Error vs. Clock Duty Cycle Full-Scale Error vs REFIN 20195231 20195235 ...
Page 12
Full-Scale Error vs. V Full-Scale Error vs. Clock Duty Cycle Supply Current vs. V www.national.com REFIN 20195232 Full-Scale Error vs. Temperature 20195238 Supply Current vs. Temperature A 20195244 12 Full-Scale Error vs. f SCLK 20195233 20195239 20195245 ...
Page 13
Glitch Response 20195246 Power-On Reset 13 20195247 www.national.com ...
Page 14
Functional Description 1.1 DAC SECTION The DAC122S085 is fabricated on a CMOS process with an architecture that consists of switches and resistor strings that are followed by an output buffer. The reference voltage is ex- ternally applied at V ...
Page 15
POWER-ON RESET The power-on reset circuit controls the output voltages both DACs during power-up. Upon application of power, the DAC registers are filled with zeros and the output voltages are 0V. The outputs remain at 0V until a valid ...
Page 16
LP3985 The LP3985 is a low noise, ultra low dropout voltage regulator with a 3% accuracy over temperature good choice for applications that do not require a precision reference for the DAC122S085. It comes in 3.0V, ...
Page 17
DSP/MICROPROCESSOR INTERFACING Interfacing the DAC122S085 to microprocessors and DSPs is quite simple. The following guidelines are offered to hasten the design process. 2.3.1 ADSP-2101/ADSP2103 Interfacing Figure 10 shows a serial interface between the DAC122S085 and the ADSP-2101/ADSP2103. The DSP ...
Page 18
Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 10-Lead MSOP Order Numbers DAC122S085CIMM NS Package Number MUB10A 10-Lead LLP Order Numbers DAC122S085CISD NS Package Number SDA10A 18 ...
Page 19
Notes 19 www.national.com ...
Page 20
... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...