AD2S93BP AD [Analog Devices], AD2S93BP Datasheet
AD2S93BP
Related parts for AD2S93BP
AD2S93BP Summary of contents
Page 1
FEATURES Full Function Monolithic LVDT-to-Digital Converter Absolute Serial Data Output Uncommitted Differential Input Repeatability Remote Diagnostics 14-Bit Resolution Industrial Temperature Range 28-Pin PLCC Low Power APPLICATIONS Industrial Gauging Industrial Process Control Linear Positioning Systems Linear Actuator Control Automotive Motion ...
Page 2
AD2S93–SPECIFICATIONS Parameter SIGNAL INPUTS Frequency 1 Max Voltage Level 2 Nominal Full Scale Input Bias Current Input Impedance CMRR 3 Maximum Sensitivity REFERENCE INPUT Frequency Voltage Level Input Bias Current Input Impedance 4 Permissible Phase Shift CONVERTER DYNAMICS Bandwidth VCO ...
Page 3
Parameter SERIAL CLOCK (SCLK) SCK Input Rate Maximum Read Rate (16 Bits) POWER SUPPLY NOTES 1 The signal input voltage maximum should always be set at 10% less than the reference input. 2 Nominal + FS ...
Page 4
... Model Range Linearity AD2S93AP – +85 C 0.1% AD2S93BP – +85 C 0.05% CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD2S93 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges ...
Page 5
GLOSSARY OF TERMS INTEGRAL LINEARITY Integral linearity deviation as a percent of full scale. A 0.1% de- viation is equivalent to 8-LSB change on the output. Gain The converter gain is the maximum variation in the ratio of A–B/REF/2 to ...
Page 6
AD2S93 0100 0000 0100 1111 0100 0000 0000 0000 0000 1111 0001 0000 0001 0000 0001 1111 0001 1111 0011 0000 0011 0000 LOS 0011 1111 OVR UNR SIGN If the maximum operating stroke of an LVDT yielded a 1 ...
Page 7
Calculation of the component values for the bandwidth is de- tailed below. For more detailed information on component value selection for the AD2S93, please consult the “Passive Component Selection and Dynamic Modeling Software for the AD2S93 LVDT-to-Digital Converter.” VCO Gain ...
Page 8
AD2S93 Three- or Four-Wire LVDT Connection In this method of connection, shown in Figure 6, the converters digital output is proportional to the ratio where A and B are the ...
Page 9
Two-Wire LVDT Connection This method should be used in cases where the sum of the LVDT secondary output voltages ( not constant with LVDT displacement over the desired stroke length. This method of connection, shown in Figure ...
Page 10
AD2S93 CIRCUIT DYNAMICS/ERROR SOURCES TRANSFER FUNCTION The AD2S93 operates as a Type 2 tracking servo loop. An inte- grator and VCO/counter perform the two integrations inherent in a Type 2 loop. The overall system response of the AD2S93 is that ...
Page 11
The small step response is given in Figure 12, and is the time taken for the converter to settled to within 1 LSB (14-bit resolution) The large step response (steps >5% of FSR) applies when the ...
Page 12
OUTLINE DIMENSIONS Dimensions shown in inches and (mm). P-28A 0.180 (4.57) 0.165 (4.19) 0.056 (1.42) 0.048 (1.21) 0.042 (1.07) 0.042 (1.07) 0.048 (1.21 0.042 (1.07) PIN IDENTIFIER 0.050 (1.27) TOP VIEW BSC ...