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PDF ISL21007 Data sheet ( Hoja de datos )
| Número de pieza | ISL21007 | |
| Descripción | Low Noise Voltage References | |
| Fabricantes | Intersil Corporation | |
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Data Sheet
April 12, 2007
ISL21007
FN6326.1
Precision, Low Noise FGA™ Voltage
References
The ISL21007 FGA™ voltage references are extremely low
power, high precision, and low noise voltage references
fabricated on Intersil’s proprietary Floating Gate Analog
technology. The ISL21007 features very low noise (4µVP-P
for 0.1Hz to 10Hz) and very low operating current (150µA,
Max). In addition, the ISL21007 family features guaranteed
initial accuracy as low as ±0.5mV.
This combination of high initial accuracy, low drift, and low
output noise performance of the ISL21007 enables versatile
high performance control and data acquisition applications
with low power consumption.
Available Options
PART NUMBER
ISL21007BFB812Z
ISL21007CFB812Z
ISL21007DFB812Z
www.DataSheet4U.com
ISL21007BFB825Z
ISL21007CFB825Z
ISL21007DFB825Z
VOUT
OPTION
(V)
1.250
1.250
1.250
2.500
2.500
2.500
INITIAL
ACCURACY
(mV)
±0.5
±1.0
±2.0
±0.5
±1.0
±2.0
TEMPCO.
(ppm/°C)
3
5
10
3
5
10
Pinout
ISL21007
(8 LD SOIC)
TOP VIEW
GND or NC 1
VIN 2
DNC 3
GND 4
8 DNC
7 DNC
6 VOUT
5 TRIM
Features
• Reference Output Voltage . . . . . . . . . . . . . . .1.25V, 2.50V
• Initial Accuracy . . . . . . . . . . . . . . . . . . . . ±0.5mV (B grade)
• Input Voltage Range: . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V
• Low Output Voltage Noise . . . . . . 4µVP-P (0.1Hz to 10Hz)
• Supply Current . . . . . . . . . . . . . . . . . . . . . . . .150µA (Max)
• Temperature Coefficient . . . . . . . . . . . . 3ppm/°C (B grade)
• Operating Temperature Range. . . . . . . . . -40°C to +125°C
• Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Ld SOIC
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• High Resolution A/Ds and D/As
• Digital Meters
• Bar Code Scanners
• Basestations
• Battery Management/Monitoring
• Industrial/Instrumentation Equipment
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL21007
Electrical Specifications (ISL21007-25, VOUT = 2.50V) VIN = 3.0V, TA = -40°C to +125°C, unless otherwise specified
PARAMETER
DESCRIPTION
CONDITIONS
MIN TYP MAX
UNIT
VOUT
ΔVOUT /ΔVIN
ΔVOUT/ΔIOUT
Output Voltage
Line Regulation
Load Regulation
ISC
ΔVOUT/ΔTA
NOTES:
Short Circuit Current
Thermal Hysteresis (Note 3)
2.7V < VIN < 5.5V
Sourcing: 0mA ≤ IOUT ≤ 5mA
Sinking: -5mA ≤ IOUT ≤ 0mA
TA = +25°C, VOUT tied to GND
ΔTA = +165°C
2.500
50
10
20
50
50
200
100
150
V
µV/V
µV/mA
µV/mA
mA
ppm
2. Over the specified temperature range. Temperature coefficient is measured by the box method whereby the change in VOUT is divided by the
temperature range; in this case, -40°C to +125°C = +165°C.
3. Thermal Hysteresis is the change of VOUT measured @ TA = +25°C after temperature cycling over a specified range, ΔTA. VOUT is read initially
at TA = +25°C for the device under test. The device is temperature cycled and a second VOUT measurement is taken at +25°C. The difference
between the initial VOUT reading and the second VOUT reading is then expressed in ppm. For Δ TA = +165°C, the device under test is cycled
from +25°C to +125°C to -40°C to +25°C.
4. FGA voltage reference long term drift is a logarithmic characteristic. Changes that occur after the first few hundred hours of operation are
significantly smaller with time, asymptotically approaching zero beyond 1,000 hours. Because of this decreasing characteristics, long term drift
is specified in ppm/√1kHrs.
Typical Performance Curves (ISL21007-12) (REXT = 100kΩ)
120
UNIT 3
100
80
UNIT 2
60 UNIT 1
40
20
95
90
+125°C
85
80
75 +25°C
70
65
-40°C
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
VIN (V)
FIGURE 2. IIN vs VIN (3 UNITS)
60
2.5 3.0 3.5 4.0 4.5 5.0
VIN (V)
FIGURE 3. IIN vs VIN OVER TEMPERATURE
5.5
1.25015
1.25010
1.25005
UNIT 3
1.25000
1.24995
UNIT 2
1.24990
1.24985
UNIT 1
1.24980
2.5
3.0
3.5 4.0
VIN (V)
4.5
5.0
FIGURE 4. LINE REGULATION (3 UNITS)
5.5
150
100
+125°C
50
0
-50
+25°C
-40°C
-100
-150
-200
-250
-300
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
VIN (V)
FIGURE 5. LINE REGULATION OVER TEMPERATURE
5 FN6326.1
April 12, 2007
5 Page 
ISL21007
0.01µF value can be increased for better load transient
response with little sacrifice in output stability.
VIN = 3.0V
0.1µF
10µF
VIN
VO
ISL21007
GND
0.01µF
2kΩ
10µF
FIGURE 28. HANDLING HIGH LOAD CAPACITANCE
Turn-On Time
The ISL21007 devices have low supply current and thus the
time to bias up internal circuitry to final values will be longer
than with higher power references. Normal turn-on time is
typically 120µs. This is shown in Figure 10. Circuit design
must take this into account when looking at power up delays
or sequencing.
Temperature Coefficient
The limits stated for temperature coefficient (tempco) are
governed by the method of measurement. The overwhelming
standard for specifying the temperature drift of a reference is to
measure the reference voltage at two temperatures, take the
total variation, (VHIGH – VLOW), and divide by the temperature
extremes of measurement (THIGH – TLOW). The result is
divided by the nominal reference voltage (at T = +25°C) and
multiplied by 106 to yield ppm/°C. This is the “Box” method for
specifying temperature coefficient.
Output Voltage Adjustment
The output voltage can be adjusted up or down by 2.5% by
placing a potentiometer from Vout to ground, and connecting
the wiper to the TRIM pin. The TRIM input is high impedance,
so no series resistance is needed. The resistor in the
potentiometer should be a low tempco (<50ppm/°C) and the
resulting voltage divider should have very low tempco
<5ppm/°C. A digital potentiometer such as the ISL95810
provides a low tempco resistance and excellent resistor and
tempco matching for trim applications.
11
FN6326.1
April 12, 2007
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet ISL21007.PDF ] | |
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