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ISL21009DFB825Z Scheda tecnica(PDF) 9 Page - Intersil Corporation

Il numero della parte ISL21009DFB825Z
Spiegazioni elettronici  Precision, Low Noise FGA??Voltage References
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Produttore elettronici  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL21009DFB825Z Scheda tecnica(HTML) 9 Page - Intersil Corporation

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9
FN6327.1
February 14, 2007
Applications Information
FGA Technology
The ISL21009 voltage reference uses floating gate
technology to create references with very low drift and
supply current. Essentially the charge stored on a floating
gate cell is set precisely in manufacturing. The reference
voltage output itself is a buffered version of the floating gate
voltage. The resulting reference device has excellent
characteristics which are unique in the industry: very low
temperature drift, high initial accuracy, and almost zero
supply current. Also, the reference voltage itself is not limited
by voltage bandgaps or zener settings, so a wide range of
reference voltages can be programmed (standard voltage
settings are provided, but customer-specific voltages are
available).
The process used for these reference devices is a floating
gate CMOS process, and the amplifier circuitry uses CMOS
transistors for amplifier and output transistor circuitry. While
providing excellent accuracy, there are limitations in output
noise level and load regulation due to the MOS device
characteristics. These limitations are addressed with circuit
techniques discussed in other sections.
Micropower Operation
The ISL21009 consumes extremely low supply current due
to the proprietary FGA technology. Low noise performance is
achieved using optimized biasing techniques. Supply current
is typically 95µA and noise is 4µVP-P benefitting precision,
low noise portable applications such as handheld meters
and instruments.
FIGURE 27. VOUT NOISE, 0.1Hz to 10Hz
FIGURE 28. LOAD TRANSIENT RESPONSE
FIGURE 29. LOAD TRANSIENT RESPONSE
Typical Performance Curves (ISL21009-50) (R
EXT = 100kΩ) (Continued)
GAIN IS x1000, NOISE
IS 4µVp-p
-50µA
50µA
7mA
-7mA
ISL21009


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