High-speed 2-channel IN / 2-channel OUT data I/O system

Transcription

1 micro-line ADA2-212 High-speed 2-channel IN / 2-channel OUT data I/O system Technical data sheet Key Features Hardware: 2 differential input channels, each 250ksps 2 differential output channels, each 10µs settling time 12 / 14 bit analog data I/O system full parallel ADC sampling replacement of the 12-bit ADC by a 14-bit ADC possible software programmable front-end parameters (sampling rate, preamplification, offset voltage and anti-alias corner frequency) E²PROM for resident storage of software programmed front-end settings and adjustments FIFO buffering to reduce the interrupt impact on the connected processors. The interrupt triggering by FIFO not empty, FIFO half full or FIFO full can be set via software hardware triggering possible via external TTL control signal or software command no potentiometers or switches used all input channels protected according to ESD standard IEC for up to 15 kv ESD (Electro Static Discharge) space-saving dimensions 120 x 67 mm (4.73 x 2.64 in) with double-sided SMD technology Software: Expansion Possibilities: full parallel synchronous operation of several ADA2-212 boards in one system micro-line system bus; pin-compatible with all boards of the micro-line family; usable for all customary signal processors, micro controllers and processors expansion from 4, 6, 8... to 14 I/O-channel parallel sampling possible when using several ADA2-212 boards Application-specific expansion possibi-lities via the serial standard I 2 C bus Application Examples: general-purpose multi-channel analog measurement and controlling zero-phase-error multi-channel analog measurement external hardware-triggered multi-channel analog measurement software support for TI DSPs ORSYS Orth System GmbH

2 General description Analog Input 1 differential +/- 10mV... +/- 10V Analog Input 2 differential +/- 10mV... +/- 10V Analog Output 1 differential +/- 10mV... +/- 10V Analog Output 2 differential +/- 10mV... +/- 10V Analog Input Channel 1 Amplification Offset Analog Input Channel 2 Amplification Offset Analog Output Channel 1 Offset Amplification Analog Output Channel 2 Offset Amplification Frequency Frequency Frequency Frequency Two-channel parallel sampling AD-Converter 12 / 14 bit Two-channel DA-Converter 512 Sample FIFO- Buffer System Timer micro-line Parallel Bus Interface 2 IC 2 Wire Extension Interface 2 EPROM Analog Inputs The analog data acquisition system ADA2-212 has two analog differential inputs with an input range of -10V to +10V. The software programmable 12-bit pre-amplifier and offset amplifier enable ADA2-212 board operations with the valid input range of +10mV and +10V with variable offset voltages. The input resistance of each channel is 20 kohm. Analog Outputs The analog differential outputs of the ADA2-212 board have the same software-programmable frontends as the analog inputs. The analog output voltage range is -9V to +9V. The output resistance of each channel is 20 Ohm. Anti-Alias Low-Pass Filter The integrated Butterworth low-pass filter (of 8th order) has an attenuation of 48 db/octave. The corner frequencies are software programmable in the range of 0.1 Hz and 50 khz. Corner frequencies between 50 khz and 200kHz as well as several filter configurations are adjustable via soldering bridges on the ADA2-212 board. An alternative to the Butterworth low-pass filters are the Bessel lowpass filters which have a better transient response but also a considerable attenuation in the passband. AD-Converter The 2-channel ADC AD7862 from Analog Devices has a 12-bit resolution and samples both channels in parallel with a sampling rate of up to 250 khz. The AD-converter can be replaced with the pincompatible AD7863 in order to increase the resolution to 14 bit. Both converters are power consumption optimized and perfectly fit the micro-line low-power concept. DA-Converter The digital-to-analog converter AD7247 from Analog Devices provides two output channels with a minimum settling time of 10µs per channel (2 x 100 KHz rectangle possible). FIFO Buffer The ADA2-212 board has a 512 sample deep FIFO buffer in order to optimize the burst behavior and the interrupt load between the AD-converter and the connected processor. The interrupt triggering can be set on 1, 256 or 512 samples via software. Due to this feature, the ADA2-212 board operates with minimum system reaction time or with minimum interrupt load. E²PROM In order to permanently store adjustments of the operating parameters the ADA2-212 board has an integrated serial E²PROM of type 24C02, with an I²C Bus interface. With this zero-balancing, offset and amplification can be stored into the permanent memory. After a reset, the parameter settings can ORSYS Orth System GmbH

3 be read from the E²PROM and there is no need to zero-balance the ADA2-212 board again. The I²C bus ports lead to the periphery in order to enable external expansions. The supplied C-software drivers support all accesses to the E²PROM module. Direct hardware accesses from the application software are not necessary. Triggering The AD-converter of the ADA2-212 board can be controlled via an external trigger signal. In the continuous sampling mode, a single rising edge starts the conversion. In the single shot mode, each rising edge of the trigger signal starts a new burst of samples. The ADA2-212 board can also act as trigger master to start the conversion of other ADA2-212 boards which are configured to accept an external trigger signal. Software The ADA2-212 software includes functions to initialize the ADA2-212 board components to start a measurement or to permanently store the parameters. The software supports all ADA2-212 board components and has to be used for hardware control. The functions which are necessary to control the ADA2-212 board are combined in a library. Translated versions for the Texas Instruments DSPs C3x, C44x and C6x11 are available. Translated example programs for the micro-line modules C31CPU, C32CPU, C44CPU and C6x11CPU are included. Synchronous Parallel Drive of Several Boards Several ADA2-212 boards can be driven in parallel and synchronously. This means, that a higher number of exactly parallel sampled channels can be implemented (with a sampling rate of up to 250 khz of each channel). The synchronous mode of the ADA2-212 can generate a huge amount of data which can be processed by several processor systems operating in parallel. Thus, the number of possible processors and analog channels is virtually unlimited. ORSYS Orth System GmbH

4 FIFOs DAC gain and offset control SCF ESD and overload protection diods DC/DC PLD component layer converter ADC timer bus driver clock solder layer ORSYS Orth System GmbH

5 ADA2-212 Pin-Configuration A-connector B-connector connector for analog inputs /outputs: PIN 12 PIN 11 PIN 1 PIN 2 X-connector D-connector power connector E-connector connector 4*ESD-ground (EGND) Pin A-Connector B-Connector D-Connector E-Connector X-Connector Input Power 1 D00 (I/O) A00 ( I ) DGND (I) AOUT1 A +15 V 2 D01 (I/O) A01 ( I ) DGND (I) SMPLCLK (IO) AGND AGND 3 D02 (I/O) A02 ( I ) DGND (I) TRIGGER (IO) AOUT0 AGND 4 D03 (I/O) A03 ( I ) DGND (I) AGND A -15 V 5 D04 (I/O) A04 ( I ) D+5V (I) AGND 6 D05 (I/O) A05 ( I ) D+5V (I) AGND 7 D06 (I/O) EGND 8 D07 (I/O) /RESET ( I ) EGND 9 D08 (I/O) AIN0+ 10 D09 (I/O) /CS1 (I) AIN0-11 D10 (I/O) /CS2 (I) AIN1+ 12 D11 (I/O) /CS3 (I) AIN1-13 D12 (I/O) /CS4 (I) 14 D13 (I/O) /CS5 (I) 15 D14 (I/O) /CS6 (I) I2C_SCL (OC) 16 D15 (I/O) /CS7 (I) I2C_SDA (OC) 17 /INT0 (OC) 18 /INT1 (OC) 19 /INT2 (OC) 20 /INT3 (OC) R/W ( I ) 25 /STRB ( I ) TCLK0 ( I ) 29 TCLK1 ( I ) ORSYS Orth System GmbH

6 Specification Summary Technical Data Analog Inputs 2-channel analog inputs, full synchronous parallel sampling Input Range between +10mV and +10V Offset Range ± 10V Input Impedance 20kOhm Analog Outputs 2 channel analog outputs Output Range between +10mV and +9V Offset Range ± 5V Output Resistance 20Ohm Anti-Alias Filter - SCF Butterworth low-pass filter of 8th order, 48dB attenuation/octave - corner-frequency adjustable between < 1Hz and 50kHz with 16-bit resolution by software - corner-frequency adjustable up to 200 khz by soldering bridges - SCF filter can be bypassed Triggering - continuous sampling mode - software triggering - external hardware triggering System Interface micro-line bus Expansion Possibilities serial I 2 C-Bus interface Front-End Parameters all analog front-end parameters like amplification, offset and anti-alias filter frequency are software programmable and on-board storable ADC AD7862, successive approximation 12bit, parallel 2 x 250ksps, low power Or AD7863, successive approximation 14bit, parallel 2 x 250ksps, low power DAC AD7247, R2R, 12bit, 2 x 10µs settling time (2 x 100KHz rectangle possible), low power ADC FIFO Buffering 512 samples FIFO, processor interrupt-triggering when first FIFO entry, when FIFO is half full or when FIFO is full Dimensions 120 mm x 67 mm (4.73 x 2.64 in) ORSYS Orth System GmbH

7 Dimensions All dimensions are provided in mm. All dimensions are provided in mm Power Consumption The following table shows the characteristic power consumption of the ADA2-212 board. Minor alterations depending on the sampling rate and the clock frequency of the connected processor are possible. The entire ADA2-212 board power consumption is about 4.5 W. Due to the small design, a warming of the board is possible and it is important to have sufficient ventilation. Under normal circumstances, the natural convection is sufficient for cooling. Mandatory ventilation can be necessary depending on the warming of the plugged-on processor module and the size of the used case. Voltage Input Voltage Range ch. Power Consumption D +5 V V 125 ma A +15 V V 140 ma A -15 V V 120 ma Ambient Temperature storage -25 C to 80 C operation 0 C to 70 C extended temperature range available on request Ambient Humidity storage with up to 90 % humidity, not thawing operation with 85 % humidity, not thawing ORSYS Orth System GmbH

8 Related micro-line hardware products: micro-line AD4-612 micro-line SC micro-line SC1394a PowerSupply micro-line C32CPU micro-line C44CPU micro-line C6x11CPU 4-channel, 12 bit, 600ksps, analog data acquisition board 200 Mbit/s IEEE high speed serial bus communication board 400 Mbit/s IEEE1394a high speed serial bus communication board Carrier board supplying high current analog / digital applications with double ± 15V DC/DC Converters 32 bit floating-point processor board 32 bit floating-point processor board 256 bit VLIW ultra high speed fixed / floating point processor board Pricing: Please ask your local distributor for the ORSYS price list. Warranty: ORSYS micro-line products have a warranty of 12 months. ORSYS Orth System GmbH Am Stadtgraben Markdorf Germany phone: fax: ORSYS web-site: sales@orsys.de ORSYS Orth System GmbH