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ADuCM350BBCZ Datasheet(PDF) 6 Page - Analog Devices |
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ADuCM350BBCZ Datasheet(HTML) 6 Page - Analog Devices |
6 / 41 page Data Sheet ADuCM350 Rev. A | Page 5 of 40 DAC/RCF/PGA Specifications Table 3. DAC/PGA/RCF Specifications Parameter1 Min Typ Max Unit Test Conditions/Comments DAC Output Range −600 +600 mV As seen by sensor Resolution 12 Bits Integral Nonlinearity (INL) ±0.85 LSB Measured at an output of the excitation loop, using gain = 1 and default DAC clock (16 MHz ÷ 49 DAC clock speed) Differential Nonlinearity (DNL) −1 +1 LSB Measured at an output of the excitation loop, using gain = 1 and default DAC clock (16 MHz ÷ 49 DAC clock speed) Full-Scale Error Positive ±0.2 % FSR PGA (gain = 1), measured at an output of the excitation loop, DAC code = 0xE00 ±1 % FSR PGA (gain = 0.025), measured at an output of the excitation loop, DAC code = 0xE00 Negative ±0.2 % FSR PGA (gain = 1), measured at an output of the excitation loop, DAC code = 0x200 ±1 % FSR PGA (gain = 0.025), measured at an output of the excitation loop, DAC code = 0x200 Offset Error, Midscale ±1 mV PGA (gain = 1 or gain = 0.025), measured at an output of the excitation loop across RCAL Clocking Frequency 280.7 320 380.95 kHz PROGRAMMABLE GAIN AMPLIFIER (PGA) Gain from PGA in State 0 1 Covered by DAC full-scale error measured on an output of the excitation loop Gain from PGA in State 1 0.025 Covered by DAC full-scale error measured on an output of the excitation loop RECONSTRUCTION FILTER (RCF) 3 dB Corner Frequency 50 kHz 1 There may be some system offsets and gain errors that can be calibrated at the system level to improve dc accuracy. Hence, the voltage swing at the output of the DAC is ±800 mV to guarantee ±600 mV swing on the sensor. SWITCH MATRIX SPECIFICATIONS Table 4. Switch Matrix Specifications Parameter Min Typ Max Unit Test Conditions/Comments RON1 Current Carrying Switches Dx, DR1, Tx, and TR2 40 50 Ω IVS 40 75 Ω Noncurrent Carrying Switches Px, Nx, and NR2 600 900 Ω PR1 600 950 Ω NL 260 350 Ω PL 210 260 Ω DC OFF LEAKAGE2 T and N Switches 370 pA Sum value of four T switches and four N switches P Switches 340 pA Sum value of four P switches D Switches 350 pA Sum value of four D switches |
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