VRE110 [ETC]
Precision Reference Supplies; 精密基准用品
| 型号： | VRE110 |
| 厂家： | 
ETC |
| 描述： | Precision Reference Supplies |
| 文件： | 总5页 (文件大小：432K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
VRE110/111/112
Precision
Reference Supplies
THALER CORPORATION • 2015 N. FORBES BOULEVARD • TUCSON, AZ. 85745 • (520) 882-4000
FEATURES
APPLICATIONS
• PRECISION A/D and D/A CONVERTERS
• TRANSDUCER EXCITATION
• VERY HIGH ACCURACY: 2.500 V OUTPUT ±200 µV
• EXTREMELY LOW DRIFT: 0.8 ppm/°C 55°C to +125°C
• LOW WARM-UP DRIFT: 1 ppm Typ.
• ACCURATE COMPARATOR THRESHOLD
REFERENCE
• EXCELLENT STABILITY: 6 ppm/1000 Hrs. Typ.
• EXCELLENT LINE REGULATION: 3 ppm/V Typ.
• HERMETIC 14-PIN CERAMIC DIP
• HIGH RESOLUTION SERVO SYSTEMS
• DIGITAL VOLTMETERS
• HIGH PRECISION TEST AND
MEASUREMENT INSTRUMENTS
• MILITARY PROCESSING OPTION
DESCRIPTION
VRE110 Series Precision Voltage References
provide ultrastable +2.500V (VRE110), -2.500V
(VRE101) and ±2.500V (VRE102) outputs with
±200 µV initial accuracy and temperature
coefficient as low as 0.8 ppm/°C over the full
SELECTION GUIDE
Temperature
Operating Range
Max. Volt
Deviation
Type
Output
VRE110C
VRE110CA +2.5V -25°C to +85°C
VRE110M +2.5V -55°C to +125°C
VRE110MA +2.5V -55°C to +125°C
VRE111C -2.5V -25°C to +85°C
VRE111CA -2.5V -25°C to +85°C
VRE111M -2.5V -55°C to +125°C
VRE111MA -2.5V -55°C to +125°C
VRE112C ±2.5V -25°C to +85°C
VRE112CA ±2.5V -25°C to +85°C
VRE112M ±2.5V -55°C to +125°C
VRE112MA ±2.5V -55°C to +125°C
+2.5V -25°C to +85°C
200 µV
100 µV
400 µV
200 µV
military temperature range. This improvement in
accuracy is made possible by unique,
proprietary multipoint laser compensation
a
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 VRE110 series the
most accurate and stable 2.5V reference
available.
200 µV
100 µV
400 µV
200 µV
200 µV
100 µV
400 µV
200 µV
VRE110/111/112 devices are available in two
operating temperature ranges, -25°C to +85°C
and -55°C to +125°C, 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.
VRE110DS REV. D NOV 2000
ELECTRICAL SPECIFICATIONS
VRE110/111/112
Vps =±15V, T = 25°C, RL = 10kΩ unless otherwise noted.
MODEL
C
CA
M
MA
PARAMETERS
MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX
UNITS
ABSOLUTE MAXIMUM RATINGS
Power Supply
Operating Temperature -25
Storage Temperature
Short Circuit Protection
±13.5
±22
85
150
*
*
*
*
*
*
*
-55
*
*
*
*
125
*
V
°C
°C
125 -55
*
-65
*
Continuous
*
*
*
OUTPUT VOLTAGE
VRE110
VRE111
VRE112
+2.5
-2.5
±2.5
*
*
*
*
*
*
*
*
*
V
V
V
OUTPUT VOLTAGE ERRORS
Initial Error
Warmup Drift
Tmin - Tmax
300
200
200
100
300
400
200
200
µV
ppm
µV
2
1
2
1
(1)
Long-Term Stability
Noise (.1-10Hz)
6
1.0
*
*
*
*
*
*
ppm/1000hr.
µVpp
OUTPUT CURRENT
Range
±10
*
*
*
mA
REGULATION
Line
Load
3
3
10
*
*
*
*
*
*
*
*
*
ppm/V
ppm/mA
OUTPUT ADJUSTMENT
Range
Temperature Coefficient
20
1
*
*
*
*
*
*
mV
µV/°C/mV
(2)
POWER SUPPLY CURRENTS
VRE110 +PS
VRE110/111 -PS
VRE112 +PS
VRE112 -PS
5
5
7
4
7
7
9
6
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
mA
mA
mA
mA
NOTES: *Same as C Models.
1.Using the box method, the specified value is the
maximum deviation from the output voltage at 25°C
over the specified operating temperature range.
2.The specified values are unloaded.
VRE110DS REV. D NOV 2000
TYPICAL PERFORMANCE CURVES
V
OUT vs. TEMPERATURE
VOUT vs. TEMPERATURE
V
OUT vs. TEMPERATURE
Temperature oC
VRE110/111/112MA
Temperature oC
VRE110/111/112CA
Temperature oC
VRE110/111/112M
Temperature oC
VRE110/111/112C
VRE110/111
JUNCTION TEMP. RISE VS. OUTPUT CURRENT
QUIESCENT CURRENT VS. TEMP
PSRR VS. FREQUENCY
Temperature oC
Output Current (mA)
Frequency (Hz)
VRE112
POSITIVE OUTPUT
JUNCTION TEMP. RISE VS. OUTPUT CURRENT
QUIESCENT CURRENT VS. TEMP
PSRR VS. FREQUENCY
Temperature oC
Output Current (mA)
Frequency (Hz)
NEGATIVE OUTPUT
JUNCTION TEMP. RISE VS. OUTPUT CURRENT
QUIESCENT CURRENT VS. TEMP
PSRR VS. FREQUENCY
Temperature oC
Output Current (mA)
Frequency (Hz)
VRE110DS REV. D NOV 2000
DISCUSSION OF PERFORMANCE
APPLICATION INFORMATION
THEORY OF OPERATION
Figure 1 shows the proper connection of the
VRE110 series voltage reference with the optional
trim resistors. When trimming the VRE112, 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 following discussion refers to the schematic
below. A FET current source is used to bias a 6.3V
zener diode. The zener voltage is divided by the
resistor network R1 and R2. This voltage is then
applied to the noninverting input of the operational
amplifier which amplifies the voltage to produce a
2.500V output. The gain is determined by the
resistor networks R3 and R4: G=1 + R4/R3. The
6.3V zener diode is used because it is the most
stable diode over time and temperature.
The VRE110 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
The current source provides a closely regulated
zener current, which determines the slope of the
reference's voltage vs. temperature function. By
trimming the zener current, a lower drift over
temperature can be achieved. But since the voltage 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.
vs. temperature function is nonlinear, this method
leaves a residual error over wide temperature
ranges.
To remove this residual error, Thaler Corporation
has developed a nonlinear compensation network of
thermistors and resistors that is used in the VRE110
series 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.
VRE110
VRE112
VRE110DS REV. D NOV 2000
EXTERNAL CONNECTIONS
FIGURE 1
1. Optional Fine Adjust for approximately ±5mV. VRE111 trim pot center tap connect to -15V.
PIN CONFIGURATION
TOP VIEW
VRE112
TOP VIEW
FINE +ADJ.
+2.5V
NC
NC
NC
FINE ADJ.
FINE -ADJ.
-2.5V
+2.5V (-2.5V)
FINE ADJ.
+PS (-PS)
FINE +ADJ.
+PS
FINE -ADJ.
-PS
VRE110
(VRE111)
-PS
NC
NC
NC
NC
NC
NC
NC
NC
REF. GND
REF. GND
GND
GND
MECHANICAL
14-PIN HYBRID
PACKAGE
INCHES
DIM MIN MAX
MILLIMETER
MIN MAX
12.1 12.7
4.9 5.4
19.7 20.4
INCHES
MILLIMETER
DIM
A
MIN
.120
.015
N/A
MAX MIN MAX
E
.480 .500
.195 .215
.775 .805
.016 .020
.038 .042
.095 .105
.085 .105
.004 .006
.155 3.0
.035 0.4
.030 N/A
.012 0.2
.310 7.3
4.0
0.9
0.7
0.3
7.8
L
Q
D
Q1
C
B
0.4
0.9
2.4
2.1
0.5
1.0
2.6
2.6
.009
.290
B1
B2
S
G1
P
0.10 0.15
VRE110DS REV. D NOV 2000
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