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LTC6803HG-2#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P40
LTC6803-2/LTC6803-4
1
680324fa
TYPICAL APPLICATION
FEATURES DESCRIPTION
Multicell Battery Stack
Monitor
The LTC
®
6803 is a 2nd generation, complete battery moni-
toring IC that includes a 12-bit ADC, a precision voltage
reference, a high voltage input multiplexer and a serial
interface. Each LTC6803 can measure up to 12 series
connected battery cells or supercapacitors. Many LTC6803
devices can be stacked to measure the voltage of each cell
in a long battery string. Each LTC6803-2/LTC6803-4 has
an individually addressable serial interface, allowing up
to 16 LTC6803-2/LTC6803-4 devices to interface to one
control processor and operate simultaneously. Each cell
input has an associated MOSFET switch for discharging
overcharged cells. The LTC6803-2 connects the bottom
of the stack to V
–
internally. It is pin compatible with the
LTC6802-2, providing a drop-in upgrade. The LTC6803-4
separates the bottom of the stack from V
–
, improving
cell 1 measurement accuracy.
The LTC6803 provides a standby mode to reduce supply
current to 12µA. Furthermore, the LTC6803 can be powered
from an isolated supply, providing a technique to reduce
battery stack current draw to zero.
The related LTC6803-1 and LTC6803-3 offer a serial in-
terface that allows the serial ports of multiple LTC6803-1
or LTC6803-3 devices to be daisy chained without opto-
couplers or isolators.
Supply Current vs Modes of Operation
APPLICATIONS
n
Measures Up to 12 Battery Cells in Series
n
Stackable Architecture
n
Supports Multiple Battery Chemistries
and Supercapacitors
n
Individually Addressable Serial Interface
n
0.25% Maximum Total Measurement Error
n
Engineered for ISO26262 Compliant Systems
n
13ms to Measure All Cells in a System
n
Passive Cell Balancing:
– Integrated Cell Balancing MOSFETs
– Ability to Drive External Balancing MOSFETs
n
Onboard Temperature Sensor and Thermistor Inputs
n
1MHz Serial Interface with Packet Error Checking
n
Safe with Random Connection of Cells
n
Built-In Self Tests
n
Delta-Sigma Converter With Built-In Noise Filter
n
Open-Wire Connection Fault Detection
n
12µA Standby Mode Supply Current
n
High EMI Immunity
n
44-Lead SSOP Package
n
Electric and Hybrid Electric Vehicles
n
High Power Portable Equipment
n
Backup Battery Systems
n
Electric Bicycles, Motorcycles, Scooters
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
+
+
+
REGISTERS
AND
CONTROL
NEXT 12-CELL
PACK BELOW
NEXT 12-CELL
PACK ABOVE
DIE TEMP
VOLTAGE
REFERENCE
100k
12V
50V
SERIAL
DATA
4-BIT
ADDRESS
12-CELL
BATTERY OR
CAPACITOR
STRING
100k NTC
12-BIT
∆Σ ADC
MUX
LTC6803-4
V
+
V
–
680324 TA01a
EXTERNAL
TEMP
ISOLATED
DC/DC
CONVERTER
HW
SHUTDOWN
1nA
SUPPLY CURRENT
1µA
1mA
STANDBY MEASURE
680324 TA01b
100nA
10nA
10µA
100µA
LTC6803-2/LTC6803-4
2
680324fa
ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage (V
+
to V
–
) .................................75V
Input Voltage (Relative to V
–
)
C0 ............................................................ –0.3V to 8V
C12 ........................................................ –0.3V to 75V
Cn (Note 5) ......................... –0.3V to Min (8 • n, 75V)
Sn (Note 5) ......................... –0.3V to Min (8 • n, 75V)
All Other Pins ........................................... –0.3V to 7V
Voltage Between Inputs
Cn to Cn – 1 ............................................. –0.3V to 8V
Sn to Cn – 1 ............................................. –0.3V to 8V
C12 to C8 ............................................... –0.3V to 25V
C8 to C4 ................................................. –0.3V to 25V
C4 to C0 ................................................. –0.3V to 25V
(Note 1)
Operating Temperature Range
LTC6803I .............................................–40°C to 85°C
LTC6803H .......................................... –40°C to 125°C
Specified Temperature Range
LTC6803I .............................................–40°C to 85°C
LTC6803H .......................................... –40°C to 125°C
Junction Temperature
........................................... 150°C
Storage Temperature Range
.................. –65°C to 150°C
Note: n = 1 to 12
LTC6803-2 LTC6803-4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
TOP VIEW
G PACKAGE
44-LEAD PLASTIC SSOP
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
V
+
C12
S12
C11
S11
C10
S10
C9
S9
C8
S8
C7
S7
C6
S6
C5
S5
C4
S4
C3
S3
C2
CSBI
SDO
SDI
SCKI
A3
A2
A1
A0
GPIO2
GPIO1
WDTB
NC
TOS
V
REG
V
REF
V
TEMP2
V
TEMP1
NC
V
–
S1
C1
S2
T
JMAX
= 150°C, θ
JA
= 70°C/W
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
TOP VIEW
G PACKAGE
44-LEAD PLASTIC SSOP
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
V
+
C12
S12
C11
S11
C10
S10
C9
S9
C8
S8
C7
S7
C6
S6
C5
S5
C4
S4
C3
S3
C2
CSBI
SDO
SDI
SCKI
A3
A2
A1
A0
GPIO2
GPIO1
WDTB
TOS
V
REG
V
REF
V
TEMP2
V
TEMP1
NC
V
–
C0
S1
C1
S2
T
JMAX
= 150°C, θ
JA
= 70°C/W
PIN CONFIGURATION
LTC6803-2/LTC6803-4
3
680324fa
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE
LTC6803IG-2#PBF LTC6803IG-2#TRPBF LTC6803G-2 44-Lead Plastic SSOP –40°C to 85°C
LTC6803IG-4#PBF LTC6803IG-4#TRPBF LTC6803G-4 44-Lead Plastic SSOP –40°C to 85°C
LTC6803HG-2#PBF LTC6803HG-2#TRPBF LTC6803G-2 44-Lead Plastic SSOP –40°C to 125°C
LTC6803HG-4#PBF LTC6803HG-4#TRPBF LTC6803G-4 44-Lead Plastic SSOP –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.
Consult LTC Marketing for information on non-standard lead based finish parts.
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/
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 43.2V, V
–
= 0V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
DC Specifications
V
S
Supply Voltage, V
+
Relative to V
–
V
ERR
Specification Met
Timing Specification Met
l
l
10
4
55
55
V
V
V
LSB
Measurement Resolution Quantization of the ADC
l
1.5 mV/Bit
ADC Offset (Note 2)
l
–0.5 0.5 mV
ADC Gain Error (Note 2)
l
–0.12
–0.22
0.12
0.22
%
%
V
ERR
Total Measurement Error (Note4)
V
CELL
= –0.3V
V
CELL
= 2.3V
V
CELL
= 2.3V
V
CELL
= 3.6V
V
CELL
= 3.6V, LTC6803IG
V
CELL
= 3.6V, LTC6803HG
V
CELL
= 4.2V
V
CELL
= 4.2V, LTC6803IG
V
CELL
= 4.2V, LTC6803HG
V
CELL
= 5V
2.3V < V
TEMP
< 4.2V, LTC6803IG
2.3V < V
TEMP
< 4.2V, LTC6803HG
l
l
l
l
l
l
l
–2.8
–5.1
–4.3
–7.9
–9
–5
–9.2
–10
–9.2
–10
±2.5
±3
2.8
5.1
4.3
7.9
9
5
9.2
10
9.2
10
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
V
CELL
Cell Voltage Range Full-Scale Voltage Range –0.3 5 V
V
CM
Common Mode Voltage Range
Measured Relative to V
–
Range of Inputs Cn < 0.25% Gain Error,
n = 2 to 11, LTC6803IG
l
1.8 5 • n V
Range of Inputs C0, C1 < 0.25% Gain Error,
LTC6803IG
l
0 5 V
Range of Inputs Cn < 0.5% Gain Error,
n = 2 to 11, LTC6803HG
l
1.8 5 • n V
Range of Inputs C0, C1 < 0.5% Gain Error,
LTC6803HG
l
0 5 V
Die Temperature Measurement Error Error in Measurement of 125°C 5 °C
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LTC6803HG-2#PBF

Mfr. #:
Buy LTC6803HG-2#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management Battery Stack Monitor, Addressable SPI
Lifecycle:
New from this manufacturer.
Delivery:
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