LT1027_15 Datasheet, PDF (3/8 Pages) Linear Technology – Precision 5V Reference

LT1027
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range otherwise specifications are at T_A = 25°C. V_IN = 10V, I_LOAD = 0, unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Line Regulation (Note 4)
8V ≤ V_IN ≤ 10V
6
12
ppm/V
q
25
ppm/V
10V ≤ V_IN ≤ 40V
3
6
ppm/V
q
8
ppm/V
Load Regulation (Notes 4, 6)
Supply Current
Sourcing Current
0 ≤ I_OUT ≤ 15mA
Sinking Current
0 ≥ I_OUT ≥ – 10mA
–8
q
– 10
q
q
–3
6
8
30
120
2.2
3.1
3.5
ppm/mA
ppm/mA
ppm/mA
mA
mA
V_TRIM Adjust Range
e_n
Output Noise (Note 5)
Temperature Hysteresis
0.1Hz ≤ f ≤ 10Hz
10Hz ≤ f ≤ 1kHz
H package; ∆T = 25°C
q
± 30
± 50
3
2.0
6.0
10
mV
µV_P-P
µV_RMS
ppm
Long Term Stability
H package
20
ppm/month
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the part may be impaired.
Note 2: Output voltage is measured immediately after turn-on. Changes
due to chip warm-up are typically less than 0.005%.
Note 3: Temperature coefficient is determined by the "box" method in
which the maximum ∆V_OUT over the temperature range is divided by ∆T.
Note 4: Line and load regulation measurements are done on a pulse basis.
Output voltage changes due to die temperature change must be taken into
account separately. Package thermal resistance is 150°C/W for TO-5 (H),
130°C/W for PDIP (N8), and 180°C/W for plastic SO (SO-8).
Note 5: RMS noise is measured with an 8-pole bandpass filter with a
center frequency of 30Hz and a Q of 1.5. The filter output is then rectified
and integrated for a fixed time period, resulting in an average, as opposed
to RMS voltage. A correction factor is used to convert average to RMS.
This value is then used to obtain RMS noise voltage in the 10Hz to 1000Hz
frequency band. This test also screens for low frequency "popcorn" noise
within the bandwidth of the filter. Consult factory for 100% 0.1Hz to 10Hz
noise testing.
Note 6: Devices typically exhibit a slight negative DC output impedance of
– 0.015Ω. This compensates for PC trace resistance, improving regulation
at the load.
TYPICAL PERFOR A CE CHARACTERISTICS
Ripple Rejection
100
V_IN = 10V
120
110
100
90
80
70
60
50
10
100
1k
FREQUENCY (Hz)
10k
1027 G01
Output Impedance vs Frequency
100
∆I = ±3mA AC
I_SOURCE = 5mA
10
1
0.1
0.01
10
100
1k
10k 100k 1M
FREQUENCY (Hz)
1027 G02
Output Voltage
5.006
5.004
5.002
5.000
4.998
4.996
4.994
–50 –25 0
25 50 75 100
TEMPERATURE (°C)
1027 G03
sn1027 1027fcs
3