Analog Devices

The AD2S1210 is a complete 10-bit to 16-bit resolution tracking resolver-to-digital converter, integrating an on-board programmable sinusoidal oscillator that provides sine wave excitation for resolvers.The converter accepts 3.15 V p-p ± 27% input signals, in the range of 2 kHz to 20 kHz on the sine and cosine inputs. A Type II servo loop is employed to track the inputs and convert the input sine and cosine information into a digital representation of the input angle and velocity. The maximum tracking rate is 3125 rps.The AD2S1210WDSTZ and the AD2S1210WDSTZRL7 models have been approved by an independent accredited body for use in Automotive Safety Integrity Level B rated applications according to ISO 26262. Contact your local Analog Devices, Inc., sales office to obtain a copy of the safety manual and ASIL B safety assessment certificate.PRODUCT HIGHLIGHTSRatiometric tracking conversion. The Type II tracking loop provides continuous output position data without conversion delay. It also provides noise immunity and tolerance of harmonic distortion on the reference and input signals.System fault detection. A fault detection circuit can sense loss of resolver signals, out-of-range input signals, input signal mismatch, or loss of position tracking. The fault detection threshold levels can be individually programmed by the user for optimization within a particular application.Input signal range. The sine and cosine inputs can accept differential input voltages of 3.15 V p-p ± 27%.Programmable excitation frequency. Excitation frequency is easily programmable to a number of standard frequencies between 2 kHz and 20 kHz.Triple format position data. Absolute 10-bit to 16-bit angular position data is accessed via either a 16-bit parallel port or a 4-wire serial interface. Incremental encoder emulation is in standard A-quad-B format with direction output available.Digital velocity output. 10-bit to 16-bit signed digital velocity accessed via either a 16-bit parallel port or a 4-wire serial interface.APPLICATIONSDC and ac servo motor controlEncoder emulationElectric power steeringElectric vehiclesIntegrated starter generators/alternatorsAutomotive motion sensing and control

The AD2S80A is a monolithic 10-, 12-, 14-, or 16-bit tracking resolver-to-digital converter contained in a 40-lead DIP or 44- terminal LCC ceramic package. It is manufactured on a BiMOS II process that combines the advantages of CMOS logic and bipolar high accuracy linear circuits on the same chip.The converter allows users toselect their own resolution and dynamic performance with external components. This allows the users great flexibility in defining the converter that best suits their system requirements. The converter allows users to select the resolution to be 10, 12, 14, or 16 bits and to track resolver signals rotating at up to 1040 revs per second (62,400 rpm) when set to 10-bit resolution.The AD2S80A converts resolver format input signals into a parallel natural binary digital word using a ratiometric tracking conversion method. This ensures high-noise immunity and tolerance of lead length when the converter is remote from the resolver.The 10-, 12-, 14- or 16-bit output word is in a three-state digital logic available in 2 bytes on the 16 output data lines. BYTE SELECT,ENABLEandINHIBITpins ensure easy data transfer to 8- and 16-bit data buses, and outputs are provided to allow for cycle or pitch counting in external counters.An analog signal proportional to velocity is also available and can be used to replace a tachogenerator.The AD2S80A operates over 50 Hz to 20,000 Hz reference frequency.APPLICATIONSDC Brushless and AC Motor ControlProcess ControlNumerical Control of Machine ToolsRoboticsAxis ControlMilitary Servo ControlPRODUCT HIGHLIGHTSMonolithicA one chip solution reduces the package size required and increases the reliability.Resolution Set by UserTwo control pins are used to select the resolution of the AD2S80A to be 10, 12, 14, or 16 bits allowing the user to use the AD2S80A with the optimum resolution for each application.Ratiometric Tracking ConversionConversion technique provides continuous output position data without conversion delay and is insensitive to absolute signal levels. It also provides good noise immunity and tolerance to harmonic distortion on the reference and input signals.Dynamic Performance Set by the UserBy selecting external resistor and capacitor values the user can determine bandwidth, maximum tracking rate and velocity scaling of the converter to match the system requirements. The external components required are all low cost preferred value resistors and capacitors, and the component values are easy to select using the simple instructions given.Velocity OutputAn analog signal proportional to velocity is available and is linear to typically one percent. This can be used in place of a velocity transducer in many applications to provide loop stabilization in servo controls and velocity feedback data.Low Power ConsumptionTypically only 300 mW.Military ProductThe AD2S80A is available processed in accordance with MIL-STD-883B, Class B.

The AD2S90 is a complete 12-bit resolution tracking resolver-to- digital converter. No external components are required to operate the device.The converter accepts 2 V rms ± 10% input signals in the range 3 kHz-20 kHz on the SIN, COS and REF inputs. A Type II servo loop is employed to track the inputs and convert the input SIN and COS information into a digital representation of the input angle. The bandwidth of the converter is set internally at 1 kHz. The maximum tracking rate is 375 rps at 12-bit resolution.Angular position output information is available in two forms, absolute serial binary and incremental A quad B.The absolute serial binary output is 12-bit (1 in 4096). The data output pin is high impedance when Chip SelectCSis logic HI. This allows the connection of multiple converters onto a common bus. Absolute angular information in serial pure binary form is accessed byCSfollowed by the application of an external clock (SCLK) with a maximum rate of 2 MHz.The encoder emulation outputs A, B and NM continuously produce signals equivalent to a 1024 line encoder.When decoded this corresponds to 12-bits resolution. Three common north marker pulse widths are selected via a single pin (NMC).An analog velocity output signal provides a representation of velocity from a rotating resolver shaft traveling in either a clockwise or counterclockwise direction.The AD2S90 operates on a ±5 V dc ± 5% power supplies and is fabricated on Analog Devices' Linear Compatible CMOS process (LC2MOS). LC2MOS is a mixed technology process that combines precision bipolar circuits with low power CMOS logic circuits.

The AD3541R is a low drift, single channel, ultra-fast, 12-/16-bit accuracy, voltage output digital-to-analog converter (DAC) that can be configured in multiple voltage span ranges. The AD3541R operates with a fixed 2.5 V reference.Each DAC incorporates three drift compensating feedback resistors for the internal transimpedance amplifier (TIA) that scales the output voltage. The device has five preconfigured output voltage ranges: 0 V to 2.5 V, 0 V to 5 V, 0 V to 10 V, −5 V to +5 V, and −2.5 V to +7.5 V.The AD3541RBCPZ16 (hereafter referred to as AD3541R-16) can operate in fast mode for maximum speed or precision mode for maximum accuracy. The AD3541RBCPZ12 (hereafter referred to as AD3541R-12) has a single operation mode.The serial peripheral interface (SPI) can be configured in dual SPI and single SPI (classic SPI) mode with single date rate (SDR) or double data rate (DDR), with logical levels from 1.2 V to 1.8 V.The AD3541R is specified over the extended industrial temperature range (–40°C to +105°C).APPLICATIONSInstrumentationHardware in the loopProcess control equipmentMedical devicesAutomated test equipmentData acquisition systemProgrammable voltage sourcesOptical communications

The AD3542R is a low drift, dual channel, ultra-fast, 12-/16-bit accuracy, voltage output digital-to-analog converter (DAC) that can be configured in multiple voltage span ranges. The AD3542R operates with a fixed 2.5 V reference.Each DAC incorporates three drift compensating feedback resistors for the internal transimpedance amplifier (TIA) that scales the output voltage. The device has five preconfigured output voltage ranges: 0 V to 2.5 V, 0 V to 5 V, 0 V to 10 V, −5 V to +5 V, and −2.5 V to +7.5 V.The AD3542RBCPZ16 (hereafter referred to as AD3542R-16) can operate in fast mode for maximum speed or precision mode for maximum accuracy. The AD3542RBCPZ12 (hereafter referred to as AD3542R-12) has a single operation mode.The serial peripheral interface (SPI) can be configured in dual synchronous SPI, dual SPI and single SPI (classic SPI) mode with single date rate (SDR) or double data rate (DDR), with logical levels from 1.2 V to 1.8 V.The AD3542R is specified over the extended industrial temperature range (–40°C to +105°C).APPLICATIONSInstrumentationHardware in the loopProcess control equipmentMedical devicesAutomated test equipmentData acquisition systemProgrammable voltage sourcesOptical communications

The AD3551R is a low drift, single channel, ultra-fast, 16-bit accuracy, current output digital-to-analog converter (DAC) that can be configured in multiple voltage span ranges. The AD3551R operates with a fixed 2.5 V reference.Each DAC incorporates three drift compensating feedback resistors for the required external transimpedance amplifier (TIA) that scales the output voltage. Offset and gain scaling registers allow for generation of multiple output span ranges, such as 0 V to 2.5 V, 0 V to 5 V, 0 V to 10 V, −5 V to +5 V, and −10 V to +10 V, and custom intermediate ranges with full 16-bit resolution.The DAC can operate in fast mode for maximum speed or precision mode for maximum accuracy.The serial peripheral interface (SPI) can be configured in quad SPI mode, dual SPI mode, and single SPI (classic SPI) mode with single date rate (SDR) or double data rate (DDR), with logical levels from 1.2 V to 1.8 V.The AD3551R is specified over the extended industrial temperature range (–40°C to +105°C).APPLICATIONSInstrumentationHardware in the loopProcess control equipmentMedical devicesAutomated test equipmentData acquisition systemProgrammable voltage sourcesOptical communications

The AD3552R is a low drift, ultra-fast, 16-bit accuracy, current output digital-to-analog converter (DAC) that can be configured in multiple voltage span ranges. The AD3552R operates with a fixed 2.5 V reference.Each DAC incorporates three drift compensating feedback resistors for the required external transimpedance amplifier (TIA) that scales the output voltage. Offset and gain scaling registers allow for generation of multiple output span ranges, such as 0 V to 2.5 V, 0 V to 5 V, 0 V to 10 V, −5 V to +5 V, and −10 V to +10 V, and custom intermediate ranges with full 16-bit resolution.The DAC can operate in fast mode for maximum speed or precision mode for maximum accuracy.The serial peripheral interface (SPI) can be configured in quad SPI mode, dual synchronous SPI mode, dual SPI mode, and single SPI (classic SPI) mode with single date rate (SDR) or double data rate (DDR), with logical levels from 1.2 V to 1.8 V.The AD3552R is specified over the extended industrial temperature range (–40°C to +105°C).APPLICATIONSInstrumentationHardware in the loopProcess control equipmentMedical devicesAutomatic test equipmentData acquisition systemProgrammable voltage sourcesOptical communications