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参数资料
| 型号： | LTC1325CN#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 10/24页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY MANAGMNT SYSTEM 18DIP |
| 标准包装： | 20 |
| 功能： | 充电管理 |
| 电池化学： | 铅酸，锂离子，镍镉，镍氢 |
| 电源电压： | 4.5 V ~ 16 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 18-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 18-DIP |
| 包装： | 管件 |
LTC1325
FU N CTIO N AL DESCRIPTIO
COMMAND WORD
The command word is 22 bits long and contains all the
information needed to configure and control the chip. On
power-up all bits are cleared to logical “0.”
Bit 5: MSB-First/LSB-First (MSBF)
The ADC data is programmed for MSB-first or LSB-first
sequence using the MSBF bit. See Serial I/O description
for details.
1
START
=1
2 3
MOD0 MOD1
4
SGL/
DIFF
5
MSBF
6
DS0
7
DS1
8
DS2
MSBF
0
DESCRIPTION
LSB-First Data Follows MSB-First Data
1
MSB-First Data Only
9
10
11
12
13
14
15
16
DIV0
17
FSCLR
DIV1
18
TO0
DIV2
19
TO1
DIV3
20
TO2
PS
21
VR0
DR0
22
VR1
DR1
DR2
Bits 6 to 8: ADC Data Input Select (DS0 to DS2)
DS2, DS1 and DS0 select which circuit is connected to the
ADC input. Do not use unlisted combinations.
LTC1325 ? F01
Figure 1. Command Word
Bit 1: Start Bit (Start)
The first “logical one” clocked into the D IN input after CS
goes low is the start bit. The start bit initiates the data
transfer and all leading zeros which precede this logical
DS2
0
0
0
0
1
DS1
0
0
1
1
0
DS0
0
1
0
1
0
DESCRIPTION
Gas Gauge Output
Battery Temperature Pin, T BAT
Ambient Temperature Pin, T AMB
Battery Divider Output Voltage, V CELL
V IN Pin
one will be ignored. After the start bit is received, the
remaining bits of the command word will be clocked in.
Bits 2 and 3: Mode Select (MOD0 and MOD1)
Bits 9 to 12: Battery Divider Ratio Select (DIV0 to DIV3)
DIV3, DIV2, DIV1 and DIV0 select the division ratio for the
voltage divider across the battery.
The two mode bits determine which of four modes the chip
will be in: idle, discharge, charge or gas gauge.
DIV3
0
DIV2
0
DIV1
0
DIV0
0
DESCRIPTION
(V BAT – V SENSE )/1
MOD1
0
0
1
1
MOD0
0
1
0
1
DESCRIPTION
Idle
Discharge
Charge
Gas Gauge
0
0
0
0
0
0
0
0
1
1
0
1
1
0
0
1
0
1
0
1
(V BAT – V SENSE )/2
(V BAT – V SENSE )/3
(V BAT – V SENSE )/4
(V BAT – V SENSE )/5
(V BAT – V SENSE )/6
0
1
1
0
(V BAT – V SENSE )/7
Bit 4: Single-Ended Differential Conversion (SGL/DIFF)
SGL/DIFF determines whether the ADC makes a single-
ended measurement with respect to ground or a differen-
tial measurement with respect to the Sense pin.
0
1
1
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
(V BAT – V SENSE )/8
(V BAT – V SENSE )/9
(V BAT – V SENSE )/10
(V BAT – V SENSE )/11
(V BAT – V SENSE )/12
(V BAT – V SENSE )/13
SGL/DIFF
0
1
DESCRIPTION
Single-Ended ADC Conversion
Differential ADC Conversion (with respect to Sense)
1
1
1
1
1
1
0
1
1
1
0
1
(V BAT – V SENSE )/14
(V BAT – V SENSE )/15
(V BAT – V SENSE )/16
10
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