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LTC2846 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC2846
Description  3.3V Software-Selectable Multiprotocol Transceiver with Termination
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2846 Datasheet(HTML) 5 Page - Linear Technology

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LTC2846
sn2846 2846fs
The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, VIN = 3.3V, VSHDN = VIN, unless otherwise noted. (Notes 2, 3)
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: All currents into device pins are positive; all currents out of device
are negative. All voltages are referenced to device ground unless otherwise
specified.
Note 3: All typicals are given for VCC = 5V, VIN = 3.3V, CVCC = CVIN = 10µF,
CVDD = 1µF, CVEE = 3.3µF and TA = 25°C.
Note 4: The Boost Regulator is specified for VIN = 3V unless otherwise
noted.
Note 5: Current limit guaranteed by design and/or correlation to static test.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V.28 Receiver
VTHL
Input Low Threshold Voltage
(Figure 12)
q
0.8
V
VTLH
Input High Threshold Voltage
(Figure 12)
q
2V
∆VTH
Receiver Input Hysteresis
(Figure 12)
q
0
0.05
0.3
V
RIN
Receiver Input Impedance
– 15V
≤ VA ≤ 15V
q
357
k
Ω
tr, tf
Rise or Fall Time
CL = 50pF (Figures 12, 16)
15
ns
tPLH
Input to Output
CL = 50pF (Figures 12, 16)
q
60
300
ns
tPHL
Input to Output
CL = 50pF (Figures 12, 16)
q
160
300
ns
Boost Switching Regulator (Note 4)
VIN
Operating Voltage
3
3.3
3.6
V
VFB
Feedback Voltage
q
1.230
1.255
1.280
V
IFB
FB Pin Bias Current
VFB = 1.255V
q
120
360
nA
IQ
Quiescent Current
VSHDN = 2.4V, Not Switching
4.2
6
mA
Quiescent Current in Shutdown
VSHDN = 0V, VIN = 3V
0.01
1
µA
∆VFB(LR)
Reference Line Regulation
3V
≤ VIN ≤ 3.6V
0.01
0.05
%/V
f
Switching Frequency
q
0.85
1.2
1.6
MHz
DCMAX
Maximum Duty Cycle
q
82
90
%
ILIM
Switch Current Limit
(Note 5)
1
1.2
2
A
VSAT
Switch VCESAT
ISW = 900mA
350
mV
ILEAK
Switch Leakage Current
VSW = 5V
0.01
1
µA
TYPICAL PERFOR A CE CHARACTERISTICS
V.11 Mode ICC vs Data Rate
DATA RATE (kBd)
10
120
130
140
2846 G04
110
100
90
100
1000
150
160
170
10000
TA = 25°C
DATA RATE (kBd)
10
120
125
130
135
140
150
100
1000
2846 G05
10000
145
TA = 25°C
DATA RATE (kBd)
10
30
35
40
45
50
60
20
40
60
80 100
2846 G06
55
TA = 25°C
V.35 Mode ICC vs Data Rate
V.28 Mode ICC vs Data Rate



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