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参数资料
| 型号： | DC956A |
| 厂商： | Linear Technology |
| 文件页数： | 8/40页 |
| 文件大小： | 0K |
| 描述： | BOARD DELTA SIGMA ADC LTC2485 |
| 软件下载： | QuikEval System |
| 设计资源： | DC956A Design File DC956A Schematic |
| 标准包装： | 1 |
| 系列： | Easy Drive™, QuikEval™ |
| ADC 的数量： | 1 |
| 位数： | 24 |
| 采样率（每秒）： | 6.8 |
| 数据接口： | I²C，串行 |
| 工作温度： | 0°C ~ 70°C |
| 已用 IC / 零件： | LTC2485 |
| 已供物品： | 板 |
| 相关产品： | LTC2485CDD#TRPBF-ND - IC ADC 24BIT I2C 10-DFN LTC2485IDD#TRPBF-ND - IC ADC 24BIT I2C 10-DFN LTC2485IDD#PBF-ND - IC ADC 24BIT I2C 10-DFN LTC2485CDD#PBF-ND - IC ADC 24BIT I2C 10-DFN |
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LTC2485
16
2485fc
APPLICATIONS INFORMATION
Initiating a New Conversion
When the LTC2485 nishes a conversion, it automatically
enters the sleep state. Once in the sleep state, the device is
ready for a Read operation. After the device acknowledges
a Read request, the device exits the sleep state and enters
the data output state. The data output state concludes
and the LTC2485 starts a new conversion once a STOP
condition is issued by the master or all 32 bits of data are
read out of the device.
During the data read cycle, a stop command may be issued
by the master controller in order to start a new conversion
and abort the data transfer. This stop command must be
issued during the ninth clock cycle of a byte read when
the bus is free (the ACK/NAK cycle).
LTC2485 Address
The LTC2485 has two address pins, enabling one in 6
possible addresses, as shown in Table 4.
Table 4. LTC2485 Address Assignment
CA1
CA0/f0 *
ADDRESS
LOW
HIGH
001 01 00
LOW
Floating
001 01 01
Floating
HIGH
001 01 11
Floating
010 01 00
HIGH
010 01 10
HIGH
Floating
010 01 11
* CA0/f0 is treated as HIGH when driven by a valid external clock.
InadditiontothecongurableaddresseslistedinTable4,the
LTC2485 also contains a global address (1110111) which
may be used for synchronizing multiple LTC2485s.
SLEEP
DATA OUTPUT
START BY
MASTER
ACK BY
LTC2485
ACK BY
SUB LSBs
MASTER
NAK BY
MASTER
LSB
R
MSB
SGN
D23
7
…
89
1
2
9
1
2
3
4
5
6
7
8
9
1
7-BIT
ADDRESS
2485 F04
Figure 4. Timing Diagram for Reading from the LTC2485
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