AD7568BP Analog Devices Inc, AD7568BP Datasheet
AD7568BP
Specifications of AD7568BP
Available stocks
Related parts for AD7568BP
AD7568BP Summary of contents
Page 1
FEATURES Eight 12-Bit DACs in One Package 4-Quadrant Multiplication Separate References Single +5 V Supply Low Power Versatile Serial Interface Simultaneous Update Capability Reset Function 44-Pin PQFP and PLCC APPLICATIONS Process Control Automatic Test Equipment General Purpose ...
Page 2
AD7568–SPECIFICATIONS Parameter AD7568B ACCURACY Resolution 12 Relative Accuracy Differential Nonlinearity Gain Error + MIN MAX Gain Temperature Coefficient 2 5 Output Leakage Current I OUT1 @ + 200 MIN MAX REFERENCE ...
Page 3
... DB15 DB0 t 8 DB15 t 9 Figure 1. Timing Diagram +2.1V Model AD7568BS AD7568BP *S = Plastic Quad Flatpack (PQFP Plastic Leaded Chip Carrier (PLCC). –3– AD7568 unless otherwise noted) MIN MAX Description CLKIN Cycle Time CLKIN High Time CLKIN Low Time FSIN Setup Time ...
Page 4
AD7568 1 ABSOLUTE MAXIMUM RATINGS (T = +25 C unless otherwise noted DGND . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 5
TERMINOLOGY Relative Accuracy Relative Accuracy or endpoint linearity is a measure of the maximum deviation from a straight line passing through the endpoints of the DAC transfer function measured after adjusting for zero error and full-scale error and ...
Page 6
AD7568 –Typical Performance Curves 5 +25 C 4.5 A 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0.0 1.0 2.0 3.0 4.0 5.0 DIGITAL INPUT – Volts Figure 3. Supply Current vs. ...
Page 7
DAC LOADED WITH ALL 1s –10 – + +25 C – 20V pk-pk IN –40 OP AMP = AD713 –50 –60 –70 DAC LOADED WITH ALL 0s –80 –90 –100 3 ...
Page 8
AD7568 UNIPOLAR BINARY OPERATION (2-Quadrant Multiplication) Figure 15 shows the standard unipolar binary connection dia- gram for one of the DACs in the AD7568. When V signal, the circuit performs 2-quadrant multiplication. Resistors R1 and R2 allow the user to ...
Page 9
Current Mode Circuit In the current mode circuit of Figure 17 biased positive by an amount V OUT1 operate correctly, the DAC ladder termination resistor must be connected internally This is the case ...
Page 10
AD7568 In the circuit of Figure (i.e., the same code is loaded to each DAC). Resonant frequency 1/(2 R3C1). 0 Quality Factor (R6/R8)•(R2/R5). Bandpass Gain, A0 ...
Page 11
PC5 PC6 PC7 SCK MOSI *ADDITIONAL PINS OMITTED FOR CLARITY Figure 21. AD7568 to 68HC11 Interface In Figure 21, LDAC and CLR are controlled by the PC6 and PC5 port outputs. As with the 80C51, each DAC of the ...
Page 12
AD7568 For systems which contain larger numbers of AD7568s and where the user also wishes to read back the DAC contents for diagnostic purposes, the SDOUT pin may be used to daisy chain several devices together and provide the necessary ...