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LTC1069-6 查看數據表(PDF) - Linear Technology

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LTC1069-6 Datasheet PDF : 10 Pages
1 2 3 4 5 6 7 8 9 10
TYPICAL PERFORMANCE CHARACTERISTICS
LTC1069-6
Dynamic Range THD + Noise
vs Input/Output Voltage
– 40
fCLK = 170kHz
–45 fCUTOFF = 3.4kHz
–50 fIN = 1kHz
– 55
VIN = 2.945VP-P
– 60
– 65
–70
–75
– 80
– 85
– 90
0.1
1
3
INPUT/OUTPUT VOLTAGE (VP-P)
1069-6 G14
Dynamic Range THD + Noise
vs Input Voltage
– 40
– 45
fCLK = 500kHz
fIN = 1kHz
– 50
– 55
VS = SINGLE 3V
–60
–65
–70
VS =
SINGLE 5V
–75
– 80
– 85
– 90
0.1
0.5 0.76 1 1.43
INPUT VOLTAGE (VRMS)
5
1069-6 G10
THD + Noise vs Frequency
– 40
fCLK = 500kHz
–45 fCUTOFF = 10kHz
– 50
– 55
–60
VS = SINGLE 3V
VIN = 0.5VRMS
–65
–70
–75
VS = SINGLE 5V
– 80
VIN = 1VRMS
– 85
– 90
1
5
FREQUENCY (kHz)
10
1069-6 G11
Supply Current vs Supply Voltage
5
4
3
85°C
25°C
2
–40°C
1
0
0 2 4 6 8 10 12 14 16
TOTAL SUPPLY VOLTAGE (V)
1069-6 G12
Output Voltage Swing
vs Temperature
RL = 10k
4.5
4.0
2.5
2.0
VS = SINGLE 5V
VS = SINGLE 3V
80
60
VS = SINGLE 3V
40
20
0
VS = SINGLE 5V
–40 –20 0 20 40 60 80
AMBIENT TEMPERATURE (°C)
1069-6 G13
PIN FUNCTIONS
AGND (Pin 1): Analog Ground. The quality of the analog
signal ground can affect the filter performance. For either
single or dual supply operation, an analog ground plane
surrounding the package is recommended. The analog
ground plane should be connected to any digital ground
at a single point. For single supply operation, Pin 1 should
be bypassed to the analog ground plane with a 0.47μF
capacitor or larger. An internal resistive divider biases
Pin 1 to 0.4366 times the total power supply of the device
(Figure 1). That is, with a single 5V supply, the potential
at Pin 1 is 2.183V ±1%. As the LTC1069-6 is optimized
1
AGND
2 V+
8
VOUT
V7
11.325k 8.775k
3
NC
6
NC
4
LTC1069-6
5
VIN
CLK
1069-6 F01
Figure 1. Internal Biasing of the Analog Ground (Pin 1)
10696fa
5

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