View VRE100_53868.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

VRE100/101/102
Precision Reference Supplies
THALER CORPORATION * 2015 N. FORBES BOULEVARD * TUCSON, AZ. 85745 * (520) 882-4000
FEATURES
* VERY HIGH ACCURACY: 10.000 V OUTPUT 0.5 mV * EXTREMELY LOW DRIFT: 0.5 ppm/C 55C to +125C * LOW WARM-UP DRIFT: 1.0 ppm Typ. * EXCELLENT STABILITY: 6 ppm/1000 Hrs. Typ. * EXCELLENT LINE REGULATION: 3 ppm/V Typ. * HERMETIC 14-PIN CERAMIC DIP * MILITARY PROCESSING OPTION * PIN & FUNCTION COMPATIBLE WITH AD2700, AD2710 Series
APPLICATIONS
* PRECISION A/D and D/A CONVERTERS * TRANSDUCER EXCITATION * ACCURATE COMPARATOR THRESHOLD REFERENCE * HIGH RESOLUTION SERVO SYSTEMS * DIGITAL VOLTMETERS * HIGH PRECISION TEST and MEASUREMENT INSTRUMENTS
DESCRIPTION
VRE100 Series Precision Voltage References provide ultrastable +10.000V (VRE100), 10.000V (VRE101) and 10.000V (VRE102) outputs with 0.5 mV initial accuracy and temperature coefficient as low as 0.5 ppm/C over the full military temperature range. This improvement in accuracy is made possible by a unique, proprietary multipoint laser compensation technique developed by Thaler Corporation. Significant improvements have been made in other performance parameters as well, including initial accuracy, warm-up drift, line regulation, and long-term stability, making the VRE100 series the most accurate and stable 10V reference available.
SELECTION GUIDE
Type
VRE100C VRE100CA VRE100M VRE100MA VRE101C VRE101CA VRE101M VRE101MA VRE102C VRE102CA VRE102M VRE102MA
Output
+10V +10V +10V +10V -10V -10V -10V -10V 10V 10V 10V 10V
Temperature Operating Range
-25C to +85C -25C to +85C -55C to +125C -55C to +125C -25C to +85C -25C to +85C -55C to +125C -55C to +125C -25C to +85C -25C to +85C -55C to +125C -55C to +125C
Max. Volt Deviation 0.6mV 0.3mV 1.0mV 0.5mV
0.6mV 0.3mV 1.0mV 0.5mV 0.6mV 0.3mV 1.0mV 0.5mV
VRE100/101/102 devices are available in two operating temperature ranges, -25C to +85C and -55C to +125C, and two performance grades. All devices are packaged in 14-pin hermetic ceramic packages for maximum long-term stability. "M" versions are screened for high reliability and quality. Superior stability, accuracy, and quality make these references ideal for precision applications such as A/D and D/A converters, high-accuracy test and measurement instrumentation, and transducer excitation.
VRE100DS REV. D MAY 1995
4-20
ELECTRICAL SPECIFICATIONS
Vps =15V, T = 25C, RL = 10K unless otherwise noted.
VRE100/101/102
CA
MIN TYP MAX MIN
MODEL PARAMETERS
MIN
C
TYP MAX
M
MA UNITS
TYP MAX MIN TYP MAX
ABSOLUTE MAXIMUM RATINGS Power Supply 13.5 22 Operating Temperature -25 85 Storage Temperature -65 150 Short Circuit Protection Continuous OUTPUT VOLTAGE VRE100 VRE101 VRE102 OUTPUT VOLTAGE ERRORS Initial Error Warmup Drift Tmin - Tmax (1) Long-Term Stability Noise (.1-10Hz) 1.0 2 0.6 6 6 * * 1 0.3 * * 0.5 2 1.0 * * 1.5 1 0.5 0.8 mV ppm mV ppm/1000hr. Vpp +10 -10 10 * * * * * * * * * V V V * * * * * * * * -55 * * * 125 * * -55 * * * 125 * V C C
OUTPUT CURRENT Range REGULATION Line Load OUTPUT ADJUSTMENT Range Temperature Coefficient POWER SUPPLY CURRENTS VRE100 +PS VRE101 -PS VRE102 +PS VRE102 -PS NOTES: *Same as C Models.
(2)
10
*
*
*
mA
3 3
10
* *
*
* *
*
* *
*
ppm/V ppm/mA
20 4
* *
* *
* *
mV V/C/mV
5 5 7 4
7 7 9 6
* * * *
* * * *
* * * *
* * * *
* * * *
* * * *
mA mA mA mA
1.Using the box method, the specified value is the maximum deviation from the output voltage at 25C over the specified operating temperature range. 2.The specified values are unloaded.
VRE100DS REV. D MAY 1995
4-21
TYPICAL PERFORMANCE CURVES
VOUT vs. TEMPERATURE VOUT vs. TEMPERATURE VOUT vs. TEMPERATURE VOUT vs. TEMPERATURE
Temperature oC VRE100/101/102C
Temperature oC VRE100/101/102CA
Temperature oC VRE100/101/102M
Temperature oC VRE100/101/102MA
VRE100/101
QUIESCENT CURRENT VS. TEMP JUNCTION TEMP. RISE VS. OUTPUT CURRENT PSRR VS. FREQUENCY
Temperature oC
Output Current (mA)
Frequency (Hz)
VRE102
POSITIVE OUTPUT QUIESCENT CURRENT VS. TEMP JUNCTION TEMP. RISE VS. OUTPUT CURRENT PSRR VS. FREQUENCY
Temperature oC
Output Current (mA)
NEGATIVE OUTPUT
Frequency (Hz)
QUIESCENT CURRENT VS. TEMP
JUNCTION TEMP. RISE VS. OUTPUT CURRENT
PSRR VS. FREQUENCY
Temperature oC
Output Current (mA)
Frequency (Hz)
VRE100DS REV. D MAY 1995
4-22
DISCUSSION OF PERFORMANCE
THEORY OF OPERATION
The following discussion refers to the schematic below. In operation, approximately 6.3 volts is applied to the noninverting input of the op amp. The voltage is amplified by the op amp to produce a 10.000V output. The gain is determined by the networks R1 and R2: G=1 + R2/R1. The 6.3V zener diode is used because it is the most stable diode over time and temperature. The zener operating current is derived from the regulated output voltage through R3. This feedback arrangement provides a closely regulated zener current. This current determines the slope of the references' voltage vs. temperature function. By trimming the zener current a lower drift over temperature can be achieved. But since the voltage vs. temperature function is nonlinear this compensation technique is not well suited for wide temperature ranges. Thaler Corporation has developed a nonlinear compensation network of thermistors and resistors that is used in the VRE series voltage references. This proprietary network eliminates most of the nonlinearity in the voltage vs. temperature function. By then adjusting the slope, Thaler Corporation produces a very stable voltage over wide temperature ranges. This network is less than 2% of the overall network resistance so it has a negligible effect on long term stability. By using highly stable resistors in our network, we produce a voltage reference that also has very good long term stability.
APPLICATION INFORMATION
Figure 1 shows the proper connection of the VRE100 series voltage reference with the optional trim resistors. When trimming the VRE102, the positive voltage should be trimmed first since the negative voltage tracks the positive side. Pay careful attention to the circuit layout to avoid noise pickup and voltage drops in the lines. The VRE100 series voltage references have the ground terminal brought out on two pins (pin 6 and pin 7) which are connected together internally. This allows the user to achieve greater accuracy when using a socket. Voltage references have a voltage drop across their power supply ground pin due to quiescent current flowing through the contact resistance. If the contact resistance was constant with time and temperature, this voltage drop could be trimmed out. When the reference is plugged into a socket, this source of error can be as high as 20ppm. By connecting pin 7 to the power supply ground and pin 6 to a high impedance ground point in the measurement circuit, the error due to the contact resistance can be eliminated. If the unit is soldered into place the contact resistance is sufficiently small that it doesn't effect performance. The VRE series voltage references can be connected with or without the use of pin 6 and still provide performance superior to the 2700 and 2710 series voltage references.
VRE100
VRE102
VRE100DS REV. D MAY 1995
4-23
FIGURE 1
EXTERNAL CONNECTIONS
1. Optional Fine Adjust for approximately 20mV. VRE101 center tap connects to -PS.
PIN CONFIGURATION
TOP VIEW
NC NC NC NC NC REF. GND GND FINE ADJ. +10V FINE ADJ. +PS NC NC NC NC NC NC NC NC REF. GND GND
TOP VIEW
FINE ADJ. -10V FINE ADJ. -PS NC NC NC -ADJ. -10V -ADJ. -PS NC REF. GND GND
TOP VIEW
+ADJ. +10V +ADJ.
VRE100
VRE101
VRE102
+PS NC NC NC
MECHANICAL
14-PIN HYBRID PACKAGE
INCHES DIM E L D B B1 B2 S P MIN .480 .195 .775 .016 .038 .095 .085 .004 MAX .500 .215 .805 .020 .042 .105 .105 .006 MILLIMETER MIN 12.1 4.9 19.7 0.4 0.9 2.4 2.1 0.10 MAX 12.7 5.4 20.4 0.5 1.0 2.6 2.6 0.15 DIM A Q Q1 C G1 INCHES MIN .120 .015 N/A .009 .290 MAX .155 .035 .030 .012 .310 MILLIMETER MIN 3.0 0.4 N/A 0.2 7.3 MAX 4.0 0.9 0.7 0.3 7.8
VRE100DS REV. D MAY 1995
4-24

▲Up To Search▲

Price & Availability of VRE100

	To Download VRE100 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .