™ ™ ADC488/16A & ADC488/8SA ® IEEE 488 A/D Converter with Digital I/O Features • Provides 16-bit A/D conversion at up to 100,000 samples/s • Offers 16 single-ended or 8 differen- tial analog inputs, expandable using master/slave configuration • Provides ±1, ±2, ±5, and ±10 VFS programmable input ranges • Features continuous throughput to the IEEE 488 bus at 200 Kbytes/s (100,000 16-bit readings/s) • Offers memory expansion up to ADC488/16A provides many of the features found in expensive digital oscilloscopes 8 Mbytes (4 Msamples) • Analog inputs isolated from ground by 500 VCM Up to 13 IEEE 488 devices • Includes eight TTL-compatible digital SCSI 488/S inputs and eight TTL digital outputs DAC488HR/2 ® • LabVIEW examples available Filter488 ™ The ADC488/16A enables high-speed, ADC488/16A high-resolution, analog voltage measure- ADC488/16A IEEE ments via the IEEE 488 bus. IEEE 488 8 DE/16 SE 8 digital 8 digital controller analog inputs outputs inputs High Resolution The ADC488/16A features 16-bit resolu- tion, 96 dB dynamic range, and 33 µV/bit sensitivity (at ±1V range). More expensive Memory Expansion Triggering scopes and waveform recorders typically The ADC488A series features a standard provide only 8- or 12-bit resolution. By The ADC488/16A offers a selection of pro- contrast, the ADC488/16A lets you detect grammable trigger sources, such as analog 4-Kbyte internal memory buffer, which is even small variations in signals with large input level, external TTL input*, IEEE 488 optionally expandable by 8 Mbytes. This voltage ranges without having to constantly Group Execute Trigger (GET), and IEEE 488 buffer can be used either to store data lo- cally to free the host computer for other reconfigure range and gain settings. TALK commands. Each trigger source can tasks, or as FIFO to double buffer data for initiate either single-shot or continuous acquisition modes. continuous high-speed throughput to the Wide Bandwidth IEEE 488 bus. Since the buffers are With a 100-kHz sample rate, the field-installable, they provide the ability to ADC488/16A can capture repetitive signals Pre-Trigger & Trigger Delay add memory as needed. with bandwidths up to 50 kHz and tran- The ADC488A pre-trigger function can store sients as fast as 20 µs. Scan intervals from data in up to 100 percent of available 10µs to 50s provide the flexibility to meet memory and is ideally suited for analyzing both high-speed transient and low-speed cause-and-effect situations. The trigger-delay data logging applications. Because the command suspends actual data acquisi- ADC488/16A can function as both a tion, from the “real” trigger point to an high-speed, digital voltmeter (DVM) and a “effective” trigger point in memory by up to low-speed, digital storage oscilloscope 8,000 scans. (DSO), it lets you acquire a wide range of signals with a single device. * External TTL trigger mode input clock frequency cannot exceed 40 kHz 302 www.iotech.com • IOtech, Inc. • 25971 Cannon Rd • Cleveland, OH 44146 • (440) 439-4091 • Fax (440) 439-4093 • sales@iotech.com IEEE 488 Data Acquisition Instruments, Interfaces, & Support Products ™ ™ ADC488/16A & ADC488/8SA ® Specifications & Ordering Information High-Speed Throughput Specifications The ADC488A can output data continuously to the IEEE 488 bus Analog and to disk at 200 Kbytes/s, permitting its use in long-term, Number of Channels: 16 single-ended or 8 differential inputs Conversion Rate: 100-kHz sampling, 16-bit successive approximation A/D high-speed data acquisition applications that exceed the storage Conversion Time: 8.1 µs typ capacity of its internal memory modules*. Thus you can use the PGA Range/Resolution/Accuracy: inexpensive mass-storage of your PC or IEEE 488 controller for Range Resolution Accuracy (% of VFS) ±1V 16 bit 33 µV/bit ±(0.02%) large amounts of data that previously required either expensive ±2V 16 bit 66 µV/bit ±(0.02%) mini or mainframe computers. ±5V 16 bit 166 µV/bit ±(0.02%) ±10V 16 bit 333 µV/bit ±(0.02%) Maximum Allowable Input: 25V p-p max Temperature Coefficient: (±0.002% ±100 µV)/˚C; 0˚ to 20˚C and 30˚ to 50˚C 50-kHz maximum A/D Acquisition Time: 1.8 µs typ input signal A/D Aperture Time: 25 ns typ bandwidth A/D Aperture Uncertainty: 0.25 ns typ Common Mode Rejection: >70 dB from DC to 100 Hz 5 Common Mode Input Voltage: 13V max, 10 V-Hz ADC488/16A 5 Channel-to-Digital Low Isolation: 250V max, 10 V-Hz ADC488/16A IEEE Connector: DB25 male connector; mating connector supplied 8 Mbyte 200 Kbytes/s IEEE controller Digital I/O maximum throughput via internal buffer the IEEE 488 bus Number of Inputs: 8 bits, TTL-level compatible 200 Kbytes/s throughput Number of Outputs: 8 bits, TTL-level compatible to disk Connector: 20-pin card-edge; mating connector supplied The ADC488A’s capacity for continuous IEEE 488 Interface high-speed data throughput eliminates Implementation: SH1, AH1, T6, TE4, L4, LE4, SR1, PP0, RL0, DC1, DT1, C0, and E1 the need to choose between acquisition Large Mbyte storage Programmable Parameters: Single-ended/differential configuration, buffer rate or acquisition duration capacity location, scan group, digital output, buffer mode, output format, trigger mode, scan interval, EOI, trigger level, SRQ mask, scan count, configurations, chan- nel, pre-trigger, and terminators Data Transfer Speed: >200 Kbytes/s (uncompensated raw binary) Isolation Connector: Standard IEEE 488 connector with metric studs All ADC488A analog circuitry is optically isolated from the digital control logic, the IEEE 488 bus, and the AC power line by up to 500 General VCM. This reduces the risk of damage to the ADC488A and the Storage: 2 Ksample (4 Kbyte) buffer standard; 4 Msample (8 Mbyte) optional Indicators: LEDs for Talk, Listen, SRQ, Error, Test, and Power controlling computer from signals with extreme ground differ- Power: 105 to 125 or 210 to 250 VAC, 50/60 Hz; 20 VA max ences. It also shields the ADC488A’s 16-bit circuitry from the Environment: 0˚ to 50˚C; 0 to 95% RH, non-condensing to 35˚C; linearly derate potentially high noise environment of the controlling computer, 3% RH/˚C from 35˚ to 50˚C Controls: Power switch, external DIP switch for IEEE 488 address resulting in quieter and more accurate analog measurements. Dimensions: 425 mm W x 203 mm D x 45 mm H (16.75” x 8” x 1.75”) Weight: 3.2 kg (7 lbs) Master/Slave Support Ordering Information Up to four “slave” ADC488As can be attached to a single master ADC488A to expand input capacity to either 80 single-ended or 40 Description Part No. IEEE 488 analog to digital converter including differential channels. A dedicated high-speed trigger line ensures 2 analog input connectors; a digital I/O port that all slave units are triggered within 250 ns of the master. connector; and rack-mount kit ADC488/16A Same as above except with simultaneous sample & hold, and 8 differential inputs ADC488/8SA 12 Support Software The ADC488A series is easy to program using a series of ASCII Accessories & Cables instructions. Because no specific language driver is required, the 4 Msample (8 Mbyte) memory option MEMX7 ® ® Shielded IEEE 488 cable, 6 ft. CA-7-3 ADC488A works with Visual Basic , C/C++, LabVIEW and any other programming language which has the capability to send and For complete information on accessories and cables, visit received data over the IEEE 488 bus. www.iotech.com/acc Related Products Hardware DAC488HR/4 Personal488 Series * At the maximum 100-kHz sample rate, the standard 4 Kbyte buffer stores only 20 ms of data; the largest 8 Mbyte buffer stores 40 seconds of data 303 www.iotech.com • IOtech, Inc. • 25971 Cannon Rd • Cleveland, OH 44146 • (440) 439-4091 • Fax (440) 439-4093 • sales@iotech.com