Datasheet

LTC6603
14
6603fa
APPLICATIONS INFORMATION
Figure 2. Bidirectional Design of GAIN0(OUT) Pin Figure 3. Diagram of Serial Interface (MSB First Out)
Figure 4. Two Devices in a Daisy Chain
V+
D
GAIN0(D0)
6603 F02
(INTERNAL
NODE)
4-BIT GAIN, BW
CONTROL CODE
NO
FUNCTION
8-BIT LATCH
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
8-BIT
SHIFT-REGISTER
SDO
SCLK
SDI
CS
6603 F03
OUT
SHUTDOWN
µP
6603 F04
CSX
SCLK
SDI
SCLK
SDI
CS
D15 D11 D10 D9 D8 D7 D3 D2 D1 D0
GAIN, BW CONTROL WORD FOR #2 GAIN, BW CONTROL WORD FOR #1
SHUTDOWN FOR #1SHUTDOWN FOR #2
V+
IN
V+
A
V+
D
+INA
–INA
SER
LPF1(CS)
LPF0(SCLK)
SDI
GND
LTC6603
#1
V
OUT1
V
IN1
0.1µF
+
–
+
–
+
–
+
–
V
IN2
3.3V
+OUTA
–OUTA
OUT1
V+
IN
V+
A
V+
D
+INA
–INA
SER
LPF1(CS)
LPF0(SCLK)
SDI
GND
LTC6603
#2
V
OUT2
0.1µF
3.3V
+OUTA
–OUTA
OUT2
GAIN0(D0)
SDO
GAIN0(D0)
SDO
SDO
Serial Control Register Defi nition
D7 D6 D5 D4 D3 D2 D1 D0
GAIN0 GAIN1 LPF0 LPF1 NO FUNCTION NO FUNCTION SHDN OUT