LTC1661 查看數據表（PDF） - Linear Technology
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LTC1661 Datasheet PDF : 14 Pages
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LTC1661
TYPICAL APPLICATIONS
CS/LD
DIN
SCK
5V 0.1µF
4
6
VH = 7.5V
(FROM MAIN
INPUT DAC)
DAC A
1
3
LTC1661
U1
2
DAC B
R2
8 50k
VA1 = 2.5V
R3
5 50k
R1
5k
10V
0.1µF
8
3+
U3A
LT1368
2–
4
1
0.1µF
–5V
VB1
R4
5k
VH′ = VH + VH
FOR EACH U1 AND U2
CODE A CODE B ∆VH, ∆VL
512 1023 –250mV
512 512
0
512
0
250mV
0.1µF
5V 0.1µF
4
6
DAC B
1
3
LTC1661
U2
2
DAC A
7
R5
R6
5 50k
5k
VB2
6–
U3B
7
LT1368
5+
R7
8 50k
VA2 = 2.5V
R8
5k
VL = –2.5V
(FROM MAIN
INPUT DAC)
LOGIC
DRIVE
VH
VL
PIN
DRIVER
(1 0F N)
VL′ = VL + ∆VL
–2.5V 250mV
VOUT
7.5V 250mV
0.1µF
VA1 = VA2 = 2.5V
VH′ = VH +
R1
R2
(VA1 – VB1)
VL′ = VL +
R1
R2
(VA2 – VB2)
FOR VALUES SHOWN,
∆VH, ∆VL ADJUSTMENT RANGE = ±250mV
∆VH, ∆VL STEP SIZE = 500µV
1661 F03
Figure 3. Pin Driver VH and VL Adjustment in ATE Applications
VIN ≥ 4.3V
0.1µF
2
LTC1258-4.1
4
1
4.096V
0.1µF
4
REF
6
VCC
8
VOUTA
3
DIN
2
LTC1661
SCK
1
CS/LD
5
VOUTB
GND
7
0V TO 4.096V
(4mV/BIT)
T
0V TO 4.096V
(4mV/BIT)
1661 F04
Figure 4. Using the LTC1258 and the LTC1661 In a Single Li-Ion Battery Application
1661fa
11
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