VRE306BD [ETC]
Analog IC ; 模拟IC\n
| 型号： | VRE306BD |
| 厂家： | 
ETC |
| 描述： | Analog IC
|
| 文件： | 总5页 (文件大小：141K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
VRE306
Low Cost
Precision Reference
THALER CORPORATION • 2015 N. FORBES BOULEVARD • TUCSON, AZ. 85745 • (520) 882-4000
FEATURES
• 6.000 V OUTPUT ± 0.600 mV (.01%)
PIN CONFIGURATION
• TEMPERATURE DRIFT: 0.6 ppm/°C
NOISE
REDUCTION
8
7
6
1
2
3
N/C
• LOW NOISE: 4µV p-p (0.1-10Hz)
VRE306
+VIN
REF. GND
• INDUSTRY STD PINOUT- 8 PIN DIP OR
SURFACE MOUNT PACKAGE
TOP
VIEW
TEMP
VOUT
4
5
GND
TRIM
•EXCELLENT LINE REGULATION: 6ppm/V Typ.
• OUTPUT TRIM CAPABILITY
FIGURE 1
DESCRIPTION
The VRE306 is a low cost, high precision 6.0V
reference. Packaged in the industry standard 8
pin DIP, the device is ideal for upgrading systems
that use lower performance references.
The VRE306 is recommended for use as a
reference for 14, 16, or 18 bit D/A converters
which require an external precision reference.
The device is also ideal for calibrating scale factor
on high resolution A/D converters. The VRE306
offers superior performance over monolithic
references.
The device provides ultrastable +6.000V output
with ±0.6000 mV (.01%) initial accuracy and a
temperature coefficient of 0.6 ppm/°C.
This
improvement in accuracy is made possible by a
unique, patented 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 VRE306 series the
most accurate reference available in the standard
8 pin DIP package.
SELECTION GUIDE
Temp.
Range
°C
Temp.
Coeff.
ppm/°C
Initial
Error
mV
Model
VRE306A
VRE306B
VRE306C
VRE306J
VRE306K
VRE306L
0.6
1.0
1.2
0.6
1.0
1.2
0.6
1.0
2.0
0.6
1.0
2.0
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
For enhanced performance, the VRE306 has an
external trim option for users who want less than
0.01% initial error.
For ultra low noise
applications, an external capacitor can be
attached between the noise reduction pin and the
ground pin. A reference ground pin is provided to
eliminate socket contact resistance errors.
For package option add D for DIP or S for Surface Mount to
end of model number.
VRE306DS REV. A JUN 1997
ELECTRICAL SPECIFICATIONS
VRE306
Vps =+15V, T = 25°C, RL = 10KW unless otherwise noted.
MODEL
A/J
B/K
C/L
PARAMETER
ABSOLUTE RATINGS
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Power Supply
+14
0
-40
-65
+15
+16
+70
+85
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
V
Operating Temp. (A,B,C)
Operating Temp. (J,K,L)
Storage Temperature
Short Circuit Protection
°C
°C
°C
+150
Continuous
OUTPUT VOLTAGE
VRE306
Temp. Sensor Voltage
6.000
630
*
*
*
*
V
mV
(1)
OUTPUT VOLTAGE ERRORS
(2)
Initial Error
0.60
1.00
1.20
mV
ppm
ppm/ °C
ppm/1000hrs
mVpp
Warmup Drift
1
2
3
(3)
Tmin - Tmax
0.6
1.0
2.0
Long-Term Stability
Noise (.1-10Hz)
6
4
*
*
*
*
(4)
OUTPUT CURRENT
Range
±10
*
*
mA
REGULATION
Line
Load
6
3
10
*
*
*
*
*
*
ppm/V
ppm/mA
OUTPUT ADJUSTMENT
Range
10
*
*
*
*
mV
(5)
POWER SUPPLY CURRENTS
VRE306 +PS
5
7
*
*
mA
4. The specified values are without the external noise
reduction capacitor.
NOTES: *Same as A/J Models.
1. The temp. reference TC is 2.1mV/ °C
5. The specified values are unloaded.
2. The specified values are without external trim.
3. The temperature coefficient is determined by the box
method using the following formula:
Vmax - Vmin
T.C. =
x 106
Vnominal x (Tmax-Tmin
)
VRE306DS REV. A JUN 1997
TYPICAL PERFORMANCE CURVES
VOUT vs. TEMPERATURE
VOUT vs. TEMPERATURE
VOUT vs. TEMPERATURE
Temperature oC
VRE306A
Temperature oC
VRE306B
Temperature oC
VRE306C
VOUT vs. TEMPERATURE
VOUT vs. TEMPERATURE
VOUT vs. TEMPERATURE
Temperature oC
VRE306K
Temperature oC
VRE306J
Temperature oC
VRE306L
JUNCTION TEMP. RISE VS. OUTPUT CURRENT
PSRR VS. FREQUENCY
QUIESCENT CURRENT VS. TEMP
Temperature oC
Output Current (mA)
Frequency (Hz)
VRE306DS REV. A JUN 1997
DISCUSSION OF PERFORMANCE
THEORY OF OPERATION
The following discussion refers to the schematic in
figure 2 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 6.000V 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.
This network is less than 2% of the overall network resistance
so it has a negligible effect on long term stability.
Figure 3 shows the proper connection of the VRE306 series
voltage references with the optional trim resistor for initial error
and the optional capacitor for noise reduction. The VRE306
reference has the ground terminal brought out on two pins (pin
4 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 4 to the power
supply ground and pin 7 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 does not effect
performance. Pay careful attention to the circuit layout to avoid
noise pickup and voltage drops in the lines.
The current source provides a closely regulated zener current,
which 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 adjusting the slope, Thaler Corporation produces a very
stable voltage over wide temperature ranges.
VRE306
FIGURE 2
EXTERNAL CONNECTIONS
+ VIN
V TEMP OUT
2
3
8
+ VOUT
6
5
VRE306
OPTIONAL
NOISE REDUCTION
CAPACITOR
OPTIONAL
FINE TRIM
ADJUSTMENT
CN
1µF
10kW
4
7
REF. GND
FIGURE 3
VRE306DS REV. A JUN 1997
MECHANICAL
FIGURE 3
INCHES
MILLIMETER
INCHES
MILLIMETER
DIM MIN MAX MIN
MAX
3.17
2.59
1.29
2.87
0.30
1.47
10.2
9.65
DIM
E
MIN
.507
.397
.264
.085
.020
.045
MAX MIN MAX
A
.115
.125
.102
.051
.113
.012
.058
.403
.380
2.92
2.48
1.14
2.71
0.22
1.32
10.0
9.44
.513 12.8
.403 10.0
.270 6.70
.095 2.15
.030 .508
.055 1.14
13.0
10.2
6.85
2.41
.762
1.39
B
.098
.046
.107
.009
.052
.397
.372
E1
E2
P
B1
C
C1
C2
D
Q
S
D1
FIGURE 4
INCHES
MILLIMETER
INCHES
MILLIMETER
DIM MIN MAX MIN
MAX
3.17
.558
1.29
2.59
0.30
10.2
9.65
DIM
E
MIN
.397
.264
.290
.195
.085
.055
.045
MAX MIN MAX
A
.115
.018
.046
.098
.009
.397
.372
.125
.022
.051
.102
.012
.403
.380
2.92
.457
1.14
2.48
0.22
10.0
9.44
.403 10.0
.270 6.70
.310 7.36
.215 4.95
.095 2.15
.065 1.39
.055 1.14
10.2
6.85
7.87
5.46
2.41
1.65
1.39
B
E1
G1
L
B1
B2
C
P
D
Q
D 1
S
VRE306DS REV. A JUN 1997
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