VMIVME-4122 8-Channel 12-bit Analog Voltage Output Board with Built-in-Test • Eight analog output channels, one 12-bit D/A converter (DAC) per output • Voltage output ranges: ±10 mA maximum output current per channel (unipolar 0 to 2.5 V, 0 to 5 V, 0 to 10 V or bipolar ±2.5, ±5, or ±10 V) • Program-controlled Ţeld wiring disconnect • Low impedance 0.8 W voltage output • Random channel update; simultaneous all channel update • Built-in-Test on-line/off-line 12-bit ADC • VMEbus 3U Eurocard size (6U front panel available) • Discrete wire or mass-terminated cables • Jumper-selectable ranges • Outputs are short circuit and transient protected • Zero volt output preset on power reset • Front panel status LED • Front panel analog output and reference voltage access • External DAC update input (TTL) APPLICATIONS • Data acquisition systems • Control systems • Precision analog stimulus • Automatic test equipment (ATE) Built-in-Test: Each analog output can be monitored INTRODUCTION — The VMIVME-4122 analog with a resident 12-bit ADC to verify channel integrity. output board provides eight analog output channels with The outputs can be monitored in both the ON-LINE and 12-bit resolution. Each output has a dedicated D/A Converter OFF-LINE operating modes with no degradation of (DAC), and can source or sink ±10 mA up to ±10 V. accuracy. Also, each DAC output register can be read back from the VMEbus. FUNCTIONAL CHARACTERISTICS System Reset: After a system reset, all outputs are set VMEbus Compliance: This board complies with the to 0.0 VDC. All Control Registers are in their default VMEbus speciŢcation (ANSI/IEEE STD1014-1987 IEC state. The Field Wiring Disconnect is enabled. All 821 and 297) with the following mnemonics: outputs are disconnected from the output connector. Addressing Mode Responding Address ModiŢers A16: $29 (Short nonprivileged I/O Front Panel Status LED: This indicator is illuminated access) or $2D (Short after a system reset. The LED can also be turned ON and supervisory I/O access) 1 OFF under software control. Data Access: D16, D08(EO) Board Address: The base VMEbus address is set by conŢguration of a jumper Ţeld. A jumper exists for each of the address bits A15 through A7; thus, the address space occupied by this board is 128 consecutive bytes. VMEbus Access: Address modiŢer bits are jumper selected and decoded to support nonprivileged, Ordering Options supervisory, and either nonprivileged or supervisory July 10, 1995 800-004122-000 B ABC – D E F board accesses. VMIVME-4122 –0 0 – A = 0 (Option reserved for future use) Output Data Transfer: Output data is stored in eight B = Front Panel Options 16-bit registers 0 = 3U 1 = 6U C = 0 (Option reserved for future use) On-Line/Off-Line Operation: In the Compatible Cable Connector software-controlled ON-LINE/OFF-LINE modes, Standard 37-pin subminiature D male connector. on-board switches can be used to connect the analog Discrete Wiring: AMP 747916-2 with 206478-4 shell. Ribbon Cable: AMP 747306-1. outputs to the Ţeld connections (ON-LINE mode), or to For Ordering Information, Call: disconnect the outputs from the Ţeld (OFF-LINE mode). 1-800-322-3616 or 1-256-880-0444 • FAX (256) 882-0859 E-mail: info@vmic.com Web Address: www.vmic.com Copyright © June 1993 by VMIC Specifications subject to change without notice. 1. DAC Data Registers must be accessed as 16-bit words. VMIC ¥ 12090 South Memorial Parkway ¥ Huntsville, Alabama 35803-3308 1 VMIVME-4122 Differential Nonlinearity: 0.025 percent maximum. Address Map: Monotonic over the operating temperature range. OFFSET from base address $0000 Integral Nonlinearity: 0.025 percent maximum Registers, Commands 2 and Reserved Accuracy, Initial : $0040 Gain Error Offset Error Output Data ±0.03% of Setting ±0.025% of Span ±1.0 mV maximum $0080 Example: for a setting of +2.000 V on the ±5 V range: Accuracy = (±0.03% x 2.000 V) ±(0.025% x 10 V) ±1.0 mV = ±0.6 mV ±2.5 mV ±1.0 mV ELECTRICAL CHARACTERISTICS = ±4.1 mV (At +25 °C and rated power supplies unless otherwise noted.) Accuracy Stability: Temperature Effects: ±35 PPM of Setting ±25 PPM of Outputs: Eight single-ended: one DAC per channel Span ±30 mV, maximum drift per °C Voltage Output Option: ±10 V, ±5 V, ±2.5 V, Long-Term: ±45 PPM of Setting ±30 PPM of Span 0 to +2.5 V, 0 to +5 V, or 0 to +10 V jumper-selectable ±50 mV, maximum drift per 1,000 hr Output Code: Each 12-bit DAC accepts digital codes Interchannel Crosstalk Rejection: 70 dB minimum in offset binary and two’s complement. 3 Output Noise : 10 µVp-p maximum at 3 s, 0 to 10 kHz. Resolution: 12 bits Transition Impulse: 5 µV - s, maximum spike during data Output Impedance: <0.8 W, on-line transitions >10 MW, off-line BIT Switching Impulse: 1 µV - s, maximum spike during Output Current: ±10 mA, over the entire output channel change voltage range Settling Time: 20 µs to 0.01 percent Output Protection: IndeŢnite short to common; transient overvoltage protected to ±25 V for one second External Trigger Pulse Width: 250 ns minimum TRANSFER CHARACTERISTICS PHYSICAL/ENVIRONMENTAL Transfer Function: Dimensions: Standard VME single height, 3U board (160 x 100 mm) N DATA Temperature: 0 to +65 °C, operating E= + E x E OUT OUTMIN SPAN 4,096 -25 to +85 °C, storage Output Connector: DB-37 D-sub female for voltage Where: outputs E = Channel output voltage OUT E = Negative end of the range OUTMIN Relative Humidity: 20 to 80 percent, noncondensing N = Channel data from the VMEbus DATA E = Positive end of the range minus the SPAN Negative end of the range 2. Initial Accuracy is established directly after reference Example: for the ±5 V range: calibaration 3. Output noise is specified at 3 s standard deviations   which includes 99.7 percent of all noise peaks for a N DATA E =−5 V + × 10 V OUT   normal distribution. Glitch (transition) and 4, 096   BIT-switching noise is not included. 2 For Ordering Information, Call: 1-800-322-3616 or 1-256-880-0444 ¥ FAX (256) 882-0859 VMIVME-4122 Cooling: Normal VMEbus chassis forced air circulation TRADEMARKS Power Requirements: +5 VDC at 3 A maximum The VMIC logo is a registered trademark of VMIC. Other registered trademarks are the property of their Altitude: Operation to 10,000 ft respective owners. BUFF AMP CONN/DISCONN. P3 12-bit DAC (1 of 8) I/O CONN. 12-bit DATA AND CONTROL V REF PORT 1 P1 8-PORT 12-bit ADC BUILT-IN-TEST DAC CONTROL VME DAC/CSR/BIT ADC FOUNDATION CONTROL ADC CNTL/DATA INTERFACE VMEbus 25 MHz CSR/STATUS OSC Figure 1. VMIVME-4122 Functional Block Diagram 8-Channel 12-bit Digital-to-Analog 3U VMEbus Card VMIC ¥ 12090 South Memorial Parkway ¥ Huntsville, Alabama 35803-3308 3