LTC1661 Linear Technology, LTC1661 Datasheet - Page 10

• Manufacturer Part Number: LTC1661
• Description: Micropower Dual 10-Bit DAC in MSOP
• Manufacturer: Linear Technology

LTC1661
TYPICAL APPLICATIO S
10
CS/LD
SCK
D
IN
1
1
3
2
3
2
Figure 4. Using the LTC1258 and the LTC1661 In a Single Li-Ion Battery Application
4
4
LTC1661
LTC1661
DAC A
DAC B
DAC B
DAC A
6
6
U1
U2
5V
5V
7
Figure 3. Pin Driver V
0.1 F
0.1 F
U
LTC1258-4.1
V
IN
2
8
V
5
V
5
V
8
V
4.3V
4
A1
B1
B2
A2
= 2.5V
= 2.5V
(FROM MAIN
50k
50k
50k
50k
(FROM MAIN
INPUT DAC)
R2
R3
R5
R7
INPUT DAC)
V
V
L
H
0.1 F
1
= –2.5V
= 7.5V
4.096V
R1
5k
R8
5k
3
2
6
5
+
–
–
+
H
LT1368
LT1368
and V
U3A
U3B
8
4
10V
–5V
4
3
2
1
0.1 F
R6
5k
REF
D
SCK
CS/LD
L
IN
0.1 F
Adjustment in ATE Applications
R4
5k
LTC1661
1
7
6
GND
V
CC
7
V
V
V
OUTA
OUTB
V
H
L
= V
0.1 F
= V
8
5
H
L
+ V
+ V
0.1 F
0.1 F
V
V
V
FOR VALUES SHOWN,
L
H
A1
H
L
V
V
0V TO 4.096V
(4mV/BIT)
T
0V TO 4.096V
(4mV/BIT)
H
H
=
=
=
1661 F04
LOGIC
DRIVE
FOR EACH U1 AND U2
, V
, V
CODE A CODE B
V
V
V
–2.5V 250mV
A2
H
L
512
512
512
L
L
+
+
ADJUSTMENT RANGE = 250mV
STEP SIZE = 500 V
= 2.5V
V
V
H
L
R1
R2
R1
R2
DRIVER
(1 0F N)
PIN
1023
(V
(V
512
0
A1
A2
– V
– V
B1
B2
–250mV
250mV
7.5V 250mV
V
)
)
H
V
, V
0
OUT
L
1661 F03