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參數(shù)資料
| 型號(hào)： | MAX6126BAUA50 |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Ultra-High-Precision, Ultra-Low-Noise, Series Voltage Reference |
| 中文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 5 V, PDSO8 |
| 封裝： | MICRO, SOP-8 |
| 文件頁數(shù)： | 14/18頁 |
| 文件大小： | 412K |
| 代理商： | MAX6126BAUA50 |
M
Ultra-High-Precision, Ultra-Low-Noise,
Series Voltage Reference
14
______________________________________________________________________________________
racy is needed. The MAX6126 has the same type of
Kelvin connection to cancel drops in the ground return
line. Connect the load to ground and bring a connection
from GNDS to exactly the same point.
Applications Information
Precision Current Source
Figure 2 shows a typical circuit providing a precision
current source. The OUTF output provides the bias cur-
rent for the bipolar transistor. OUTS and GNDS sense
the voltage across the resistor and adjust the current
sourced by OUTF accordingly. For even higher preci-
sion, use a MOSFET to eliminate base current errors.
High-Resolution DAC and Reference from
a Single Supply
Figure 3 shows a typical circuit providing the reference
for a high-resolution, 16-bit MAX541 D/A converter.
Temperature Coefficient vs. Operating
Temperature Range for a 1 LSB Maximum
Error
In a data converter application, the reference voltage of
the converter must stay within a certain limit to keep the
error in the data converter smaller than the resolution
limit through the operating temperature range. Figure 4
shows the maximum allowable reference voltage tem-
perature coefficient to keep the conversion error to less
than 1 LSB, as a function of the operating temperature
range (T
MAX
- T
MIN
) with the converter resolution as a
parameter. The graph assumes the reference voltage
temperature coefficient as the only parameter affecting
accuracy.
In reality, the absolute static accuracy of a data con-
verter is dependent on the combination of many para-
meters such as integral nonlinearity, differential
nonlinearity, offset error, gain error, as well as voltage
reference changes.
OUTF
I
SOURCE
R
OUTS
V
OUT(NOMINAL)
/ R = I
SOURCE
IN
GND
GNDS
MAX6126
Figure 2. Precision Current Source
OUTF
OUTS
IN
GND
GNDS
MAX6126
OUT
REF
ANALOG
OUTPUT
V
DD
3V SUPPLY
GND
MAX541
DAC
Figure 3. 14-Bit High-Resolution DAC and Positive Reference
from a Single 3V Supply
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