Datasheet

LTC1069-6
5
10696fa
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current vs Supply Voltage
Output Voltage Swing
vs Temperature
Dynamic Range THD + Noise
vs Input/Output Voltage
Dynamic Range THD + Noise
vs Input Voltage THD + Noise vs Frequency
INPUT/OUTPUT VOLTAGE (V
P-P
)
0.1
–90
THD + NOISE (dB)
–80
–70
–60
–50
13
1069-6 G14
–85
–75
–65
–55
–45
–40
f
CLK
= 170kHz
f
CUTOFF
= 3.4kHz
f
IN
= 1kHz
V
IN
= 2.945V
P-P
INPUT VOLTAGE (V
RMS
)
0.1 0.5 0.76 1.43
–90
THD + NOISE (dB)
–80
–70
–60
–50
15
1069-6 G10
–85
–75
–65
–55
–45
–40
f
CLK
= 500kHz
f
IN
= 1kHz
V
S
= SINGLE 3V
V
S
=
SINGLE 5V
FREQUENCY (kHz)
1510
1069-6 G11
–90
THD + NOISE (dB)
–80
–70
–60
–50
–85
–75
–65
–55
–45
–40
f
CLK
= 500kHz
f
CUTOFF
= 10kHz
V
S
= SINGLE 3V
V
IN
= 0.5V
RMS
V
S
= SINGLE 5V
V
IN
= 1V
RMS
TOTAL SUPPLY VOLTAGE (V)
0
0
SUPPLY CURRENT (mA)
2
5
4
8
10
1069-6 G12
1
4
3
26
12
14
16
85°C
–40°C
25°C
AMBIENT TEMPERATURE (°C)
–40–200 20406080
0
POSITIVE SWING (V)NEGATIVE SWING (mV)
20
40
60
80
4.5
2.5
4.0
2.0
1069-6 G13
R
L
= 10k
V
S
= SINGLE 5V
V
S
= SINGLE 3V
V
S
= SINGLE 3V
V
S
= SINGLE 5V
PIN FUNCTIONS
AGND (Pin 1): Analog Ground. The quality of the analog
signal ground can affect the fi lter 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
V
+
NC
V
IN
V
OUT
V
–
1
2
3
4
8
7
6
5
NC
CLK
LTC1069-6
1069-6 F01
AGND
11.325k 8.775k
Figure 1. Internal Biasing of the Analog Ground (Pin 1)