LTC1067 查看數據表（PDF） - Linear Technology
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LTC1067 Datasheet PDF : 20 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
LTC1067/LTC1067-50
LTC1067/LTC1067-50 Mode 1B
Noise Increase vs R5/R6 Ratio
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
R5/R6 RATIO
1067 G25
LTC1067/LTC1067-50 Mode 3
Noise Increase vs R2/R4 Ratio
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
R2/R4 RATIO
1067 G26
PIN FUNCTIONS
V+, V – (Pins 1, 3,14): The V + (Pins 1, 3) and the V – (Pin
14) should each be bypassed with a 0.1µF capacitor to an
adequate analog ground. The filter’s power supplies should
be isolated from other digital or high voltage analog
supplies. A low noise linear supply is recommended.
Using a switching power supply will lower the signal-to-
noise ratio of the filter. The supply’s power-up slew rate
should be less than 1V/µs. WhenV + is applied beforeV –, and
V – is allowed to go above ground, a diode should clamp V –
to prevent latch-up. Figures 1 and 2 show typical connec-
tions for dual and single supply operation.
V+
0.1µF
1 V+
CLK 16
2 NC
AGND 15
3 V+
V– 14
4 SA LTC1067
SB 13
5 LPA LTC1067-50 LPB 12
6 BPA
BPB 11
7 HPA/NA
HPB/NB 10
8 INV A
INV B 9
V–
0.1µF
STAR
SYSTEM
GROUND
DIGITAL
GROUND
PLANE
200Ω
CLOCK
SOURCE
1067 F01
Figure 1. Dual Supply Ground Plane Connections
1 V+
CLK 16
2 NC
V+
3 V+
AGND 15
V– 14
1µF
0.1µF
4 SA LTC1067
SB 13
5 LPA LTC1067-50 LPB 12
6 BPA
BPB 11
7 HPA/NA
HPB/NB 10
8 INV A
INV B 9
STAR
SYSTEM
GROUND
DIGITAL
GROUND
PLANE
200Ω
CLOCK
SOURCE
FOR MODE 3, THE SA AND SB SUMMING NODE PINS
ARE TIED TO THE AGND PIN
1067 F02
Figure 2. Single Supply Ground Plane Connections
7
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