Datasheet

LT6555
2
6555f
Total Supply Voltage (V
+
to V
) ............................ 12.6V
Input Current (Note 2) ........................................ ±10mA
Output Current (Continuous) ............................. ±70mA
EN to DGND Voltage (Note 2) ................................. 5.5V
SEL to DGND Voltage (Note 2) .................................. 8V
Output Short-Circuit Duration (Note 3) ............ Indefinite
Operating Temperature Range (Note 4) ... –40°C to 85°C
Specified Temperature Range (Note 5) .... –40°C to 85°C
ORDER PART
NUMBER
T
JMAX
= 150°C, θ
JA
= 90°C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
LT6555CGN
LT6555IGN
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
Junction Temperature
SSOP ................................................................ 150°C
QFN .................................................................. 125°C
Storage Temperature Range
SSOP ................................................. –65°C to 150°C
QFN ................................................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec)
SSOP ................................................................ 300°C
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
GN PACKAGE
24-LEAD PLASTIC SSOP
24
23
22
21
20
19
18
17
16
15
14
13
IN1A
DGND
IN2A
V
REF
IN3A
AGND1
IN1B
AGND2
IN2B
AGND3
IN3B
V
V
+
EN
SEL A/B
V
+
OUT1
V
OUT2
V
+
OUT3
V
V
+
V
+
G = +2
G = +2
G = +2
ORDER PART
NUMBER
UF PART*
MARKING
6555
LT6555CUF
LT6555IUF
24 23 22 21 20 19
7 8 9
TOP VIEW
25
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
10 11 12
6
5
4
3
2
1
13
14
15
16
17
18V
REF
IN3A
AGND1
V
IN1B
AGND2
V
+
OUT1
V
OUT2
V
+
OUT3
IN2A
DGND
IN1A
V
+
EN
SEL A/B
IN2B
AGND3
IN3B
V
+
V
+
V
T
JMAX
= 125°C, θ
JA
= 37°C/W, θ
JC
= 2.6°C/W
EXPOSED PAD (PIN 25) IS V
MUST BE SOLDERED TO PCB
ELECTRICAL CHARACTERISTICS
The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
= ±5V, R
L
= 150, C
L
= 1.5pF, V
EN
= 0.4V, V
AGND
, V
DGND
, V
VREF
= 0V.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OS
Input Referred Offset Voltage V
IN
= 0V, V
OS
= V
OUT
/2 5 ±16 mV
±24 mV
I
IN
Input Current –17 ±45 µA
R
IN
Input Resistance V
IN
= ±1V 100 400 k
C
IN
Input Capacitance f = 100kHz 1 pF
PSRR Power Supply Rejection Ratio V
S
= ±2.25V to ±6V (Note 6) 56 62 dB
I
PSRR
Input Current Power Supply Rejection V
S
= ±2.25V to ±6V (Note 6) 1 ±4 µA/V
A
V
ERR Gain Error V
OUT
= ±2V, Nominal Gain 2V/V ±2.5 %
A
V
MATCH Gain Matching Any One Channel to Another ±0.33 %
V
OUT
Output Voltage Swing (Note 7) ±3.15 ±3.4 V
±3.0 V