LTC6957-1 Output Current ........................ 1mA, –30mA
LTC6957-2 Output Current ................................. ±10mA
LTC6957-3, LTC6957-4 Output Current (Note 3) .. ±30mA
Specified Temperature Range
LTC6957I .............................................–40°C to 85°C
LTC6957H .......................................... –40°C to 125°C
Junction Temperature .......................................... 150°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (for MSOP Soldering, 10sec) ... 300°C
PIN CONFIGURATION
LTC6957-1, LTC6957-2
TOP VIEW
FILTA
V
+
IN
+
IN
–
GND
FILTB
1
2
3
4
5
6
13
GND
12 SD1
11
OUT1
+
10 OUT1
–
9 OUT2
–
8
OUT2
+
7 SD2
FILTA
V
+
IN
+
IN
–
GND
FILTB
1
2
3
4
5
6
13
GND
LTC6957-3, LTC6957-4
TOP VIEW
12 SD1
11 V
DD
10 OUT1
9 OUT2
8 GNDOUT
7 SD2
DD PACKAGE
12-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 150°C,
θ
JA
= 58°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
LTC6957-1, LTC6957-2
TOP VIEW
FILTA
V
+
IN
+
IN
–
GND
FILTB
1
2
3
4
5
6
12
11
10
9
8
7
SD1
OUT1
+
OUT1
–
OUT2
–
OUT2
+
SD2
DD PACKAGE
12-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 150°C,
θ
JA
= 58°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
LTC6957-3, LTC6957-4
TOP VIEW
FILTA
V
+
IN
+
IN
–
GND
FILTB
1
2
3
4
5
6
12
11
10
9
8
7
SD1
V
DD
OUT1
OUT2
GNDOUT
SD2
MS PACKAGE
12-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 145°C/W
MS PACKAGE
12-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 145°C/W
2
6957fb
For more information
www.linear.com/LTC6957-1
LTC6957-1/LTC6957-2/
LTC6957-3/LTC6957-4
ORDER INFORMATION
LEAD FREE FINISH
LTC6957IDD-1#PBF
LTC6957IDD-2#PBF
LTC6957IDD-3#PBF
LTC6957IDD-4#PBF
LTC6957IMS-1#PBF
LTC6957HMS-1#PBF
LTC6957IMS-2#PBF
LTC6957HMS-2#PBF
LTC6957IMS-3#PBF
LTC6957HMS-3#PBF
LTC6957IMS-4#PBF
LTC6957HMS-4#PBF
TAPE AND REEL
LTC6957IDD-1#TRPBF
LTC6957IDD-2#TRPBF
LTC6957IDD-3#TRPBF
LTC6957IDD-4#TRPBF
LTC6957IMS-1#TRPBF
LTC6957HMS-1#TRPBF
LTC6957IMS-2#TRPBF
LTC6957HMS-2#TRPBF
LTC6957IMS-3#TRPBF
LTC6957HMS-3#TRPBF
LTC6957IMS-4#TRPBF
LTC6957HMS-4#TRPBF
http://www.linear.com/product/LTC6957-1#orderinfo
PART MARKING*
LFQJ
LFQK
LFQM
LFQN
69571
69571
69572
69572
69573
69573
69574
69574
PACKAGE DESCRIPTION
12-Lead (3mm × 3mm) Plastic DFN
12-Lead (3mm × 3mm) Plastic DFN
12-Lead (3mm × 3mm) Plastic DFN
12-Lead (3mm × 3mm) Plastic DFN
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
SPECIFIED TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
6957fb
For more information
www.linear.com/LTC6957-1
3
LTC6957-1/LTC6957-2/
LTC6957-3/LTC6957-4
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
Inputs (IN
–
, IN
+
)
f
IN
V
INSE
V
INDIFF
t
MIN
V
INCM
R
IN
C
IN
BW
IN
Input Frequency Range
Input Signal Level Range, Single-Ended
Input Signal Level Range, Differential
Minimum Input Pulse Width
Self-Bias Voltage, IN
+
, IN
–
Input Resistance, Differential
Input Capacitance, Differential
Input Section Small Signal Bandwidth (–3dB)
FILTB = L, FILTA = L
FILTB = L, FILTA = H
FILTB = H, FILTA = L
FILTB = H, FILTA = H
LTC6957I
LTC6957H
LTC6957I
LTC6957H
l
l
l
l
l
l
l
l
LTC6957-1
The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 3.3V,
SD1 = SD2 = 0.4V, FILTA = FILTB = 0.4V, R
LOAD
= 50Ω connected to 1.3V, unless otherwise specified. All voltages are with respect to ground.
CONDITIONS
MIN
TYP
MAX
300
0.2
0.2
1.8
1.5
0.8
0.8
0.5
l
l
UNITS
MHz
V
P-P
V
P-P
ns
V
kΩ
pF
MHz
MHz
MHz
MHz
V
V
V
V
mV
ps
ps
2
2
2.3
2.5
High or Low
2.06
2
0.5
1200
500
160
50
Outputs (LVPECL)
V
OH
V
OL
V
OD
t
r
t
f
t
PD
Output High Voltage
Output Low Voltage
Output Differential Voltage
Output Rise Time
Output Fall Time
Propagation Delay
FILTB = L, FILTA = L
FILTB = L, FILTA = H
FILTB = H, FILTA = L
FILTB = H, FILTA = H
FILTB = L, FILTA = L
FILTB = L, FILTA = H
FILTB = H, FILTA = L
FILTB = H, FILTA = H
FILTB = L, FILTA = L
See Timing Diagram
R
LOAD
= 50Ω to (V
+
– 2V)
No Output Loads
No Output Loads
No Output Loads
R
LOAD
= 50Ω to (V
+
– 2V), ×4
l
l
l
l
l
l
l
l
l
l
l
V
+
– 1.22 V
+
– 0.98 V
+
– 0.93
V
+
– 1.22 V
+
– 0.98 V
+
– 0.87
V
+
– 2.1
V
+
– 2.1
±660
V
+
– 1.8
V
+
– 1.8
±810
180
160
0.35
0.5
0.6
1.1
3.2
0.1
0.1
0.11
0.15
4
3
2.5
3.15
3.3
18
15
0.7
58
40
120
20
20
50
30
30
3.45
22
19
1.2
72
0.7
0.8
1.3
4
V
+
– 1.67
V
+
– 1.62
±965
ns
ns
ns
ns
ps/°C
ps/°C
ps/°C
ps/°C
ps/V
ps
ps
V
mA
mA
mA
mA
µs
µs
µs
µs
∆t
PD
/∆T
Propagation Delay Variation Over Temperature
∆t
PD
/∆V
t
SKEW
t
MATCH
Power
V
+
I
S
Propagation Delay Variation vs Supply Voltage
Output Skew, Differential, CH1 to CH2
Output Matching (OUTx
+
to OUTx
–
)
V
+
Operating Supply Voltage Range
Supply Current
Both Outputs Enabled (SD1 = SD2 = L)
One Output Enabled (SD1 = L, SD2 = H or SD1 = H, SD2 = L)
嵌入式系统
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