LTC1060 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC1060 Datasheet PDF : 20 Pages
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LTC1060
APPLICATIO S I FOR ATIO
Table 2. Wideband RMS Noise
VS
±5V
±5V
±2.5V
±2.5V
±5V
±5V
±2.5V
±2.5V
±5V
±5V
±2.5V
±2.5V
±5V
±5V
±2.5V
±2.5V
fCLK
f0
50:1
100:1
50:1
100:1
50:1
100:1
50:1
100.1
50:1
100:1
50:1
100.1
50:1
100:1
50:1
100:1
NOTCH/HP
(µVRMS)
49 (42)
70 (55)
33 (31)
48 (40)
20 (18)
25 (21)
16 (15)
20 (17)
57
72
40
50
135
170
100
125
BP
(µVRMS)
52 (43)
80 (58)
36 (32)
52 (40)
150 (125)
220 (160)
100 (80)
150 (105)
57
72
40
50
120
160
88
115
LP
(µVRMS)
75 (65)
90 (88)
48 (43)
66 (55)
186 (155)
240 (180)
106 (87)
150 (119)
62
80
42
53
140
185
100
130
CONDITIONS
Mode1, R1 = R2 = R3
Q=1
Mode 1, Q = 10
R1 = R3 for BP out
R1 = R2 for LP out
Mode 3, R1 = R2 = R3 = R4
Q=1
Mode 3, R2 = R4, Q = 10
R3 = R1 for BP out
R4 = R1 for LP and HP out
Short-Circuit Currents
Short circuits to ground, positive or negative power supply
are allowed as long as the power supplies do not exceed
±5V and the ambient temperature stays below 85˚C.
Above ±5V and at elevated temperatures, continuous
short circuits to the negative power supply will cause
excessive currents to flow. Under these conditions, the
device will get damaged if the short-circuit current is
allowed to exceed 80mA.
DEFINITION OF FILTER FUNCTIONS
Each building block of the LTC1060, together with an
external clock and a few resistors, closely approximates
2nd order filter functions. These are tabulated below in the
frequency domain.
1. Bandpass function: available at the bandpass output
Pins 2 (19). (Figure 1.)
Q = Quality factor of the complex pole pair. It is the
ratio of f0 to the –3dB bandwidth of the 2nd or-
der bandpass function. The Q is always mea-
sured at the filter BP output.
2. Lowpass function: available at the LP output Pins
1 (20). (Figure 2.)
G(s)
=
HOBP
s2
+
sωo/Q
(sωo/Q)
+
ωo2
HOBP = Gain at ω = ωo
f0 = ω/2π; f0 is the center frequency of the complex
pole pair. At this frequency, the phase shift
between input and output is –180˚.
G(s) = HOLP
ω2o
s2 + s(ωo/Q) + ω2o
HOLP DC gain of the LP output.
1060fb
9
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