EVAL-AD2S1205CBZ Analog Devices Inc, EVAL-AD2S1205CBZ Datasheet
EVAL-AD2S1205CBZ
Specifications of EVAL-AD2S1205CBZ
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EVAL-AD2S1205CBZ Summary of contents
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FEATURES Complete monolithic resolver-to-digital converter (RDC) Parallel and serial 12-bit data ports System fault detection ±11 arc minutes of accuracy Input signal range: 3.15 V p-p ± 27% Absolute position and velocity outputs 1250 rps maximum tracking rate, 12-bit resolution ...
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AD2S1205 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 5 ESD Caution .................................................................................. 5 Pin ...
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SPECIFICATIONS 5.0 V ± −40°C to +125°C, CLKIN = 8.192 MHz ± 25%, unless otherwise noted Table 1. Parameter 1 Sin, Cos INPUTS Voltage Input Bias Current Input Impedance Common-Mode Voltage Phase-Lock ...
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AD2S1205 Parameter Degradation of Signal (DOS) Sin/Cos Threshold Angular Accuracy (Worst Case) Angular Latency (Worst Case) Time Latency Sin/Cos Mismatch Loss of Tracking (LOT) Tracking Threshold Time Latency Hysteresis VOLTAGE REFERENCE REFOUT Drift PSRR CHARGE-PUMP OUTPUT (CPO) Frequency Duty Cycle ...
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ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage ( Supply Voltage ( Input Voltage Output Voltage Swing Input Current to Any Pin Except Supplies Operating Temperature Range (Ambient) Storage Temperature Range 1 Transient currents of up ...
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AD2S1205 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS DB10/SCLK Table 3. Pin Function Descriptions Pin No. Mnemonic Description Digital Supply Voltage, 4. 5.25 V. This is the supply voltage for all digital circuitry on the AD2S1205. The ...
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Pin No. Mnemonic Description 26 B Incremental Encoder Emulation Output B. Logic output. This output is free running and is valid if the resolver format input signals applied to the converter are valid North Marker Incremental Encoder Emulation ...
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AD2S1205 RESOLVER FORMAT SIGNALS × Sin(ω θ × Sin(ωt) × Sin(θ (A) CLASSICAL RESOLVER A classical resolver is a rotating transformer that typically has a primary ...
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THEORY OF OPERATION The AD2S1205’s operation is based on a Type II tracking closed- loop principle. The digitally implemented tracking loop continually tracks the position and velocity of the resolver without the need for external convert and wait states. As ...
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AD2S1205 SIGNAL DEGRADATION DETECTION Degradation of signal (DOS) is detected when either resolver input (Sin or Cos) exceeds the specified DOS Sin/Cos threshold. The AD2S1205 detects this by comparing the monitor signal to a fixed maximum value. In addition, DOS ...
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... Sin and Cos signals generated by determining the zero crossing of either the Sin or Cos (whichever signal is larger), which improves phase accuracy, and evaluating the phase of the resolver reference excitation. The synthetic reference reduces the phase shift between the reference and Sin/Cos inputs to less than 10° ...
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AD2S1205 A separate screened twisted pair cable is recommended for analog inputs Sin/SinLO and Cos/CosLO. The screens should terminate to either REFOUT or AGND 4.7μF 10nF 10μF 68kΩ 68kΩ ...
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CS Input The device is enabled when CS is held low. RDVEL Input RDVEL input is used to select between the angular position register and the angular velocity register, as shown in RDVEL is held high to select the angular ...
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AD2S1205 SERIAL INTERFACE The angular position and velocity are available on the AD2S1205 in two 12-bit registers. These registers can be accessed via a 3-wire serial interface (SO and SCLK) that operates at clock rates ...
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CLKIN CLKIN t 1 SAMPLE CS RD RDVEL SCLK MSB Table 7. Serial Port Timing Parameter Description t MSB read time RD/CS to SCLK enable time RD/CS to ...
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AD2S1205 INCREMENTAL ENCODER OUTPUTS The A, B, and NM incremental encoder emulation outputs are free running and are valid if the resolver format input signals applied to the converter are valid. The AD2S1205 emulates a 1024-line encoder, meaning that, in ...
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CIRCUIT DYNAMICS LOOP RESPONSE MODEL ERROR (ACCELERATION) VELOCITY c 1 – az θ k1 × –1 1 – – bz – Sin/Cos LOOKUP Figure 11. RDC System Response Block Diagram The RDC is a mixed-signal device ...
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AD2S1205 The step response to a 10° input step is shown in Figure 14. Because the error calculation (see Equation 2) is nonlinear for large values of θ − ϕ, the response time for such large (90° to 180°) step ...
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CONNECTING TO THE DSP The AD2S1205 serial port is ideally suited for interfacing to DSP- configured microprocessors. Figure 16 shows the AD2S1205 interfaced to an ADMC401, one of the DSP-based motor controllers. The on-chip serial port of the ADMC401 is ...
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... Evaluation board controller. This board is a complete unit that allows control and communicate with all Analog Devices evaluation boards ending in the CB designator. For a complete evaluation kit, order the ADC evaluation board (that is, the EVAL-AD2S1205CBZ), the EVAL-CONTROL BRD2, and transformer. AUTOMOTIVE PRODUCTS The AD2S1205 models are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. Note that these automotive models may have specifications that differ from the commercial models ...