參數(shù)資料
型號: LTC2495CUHF#PBF
廠商: Linear Technology
文件頁數(shù): 11/34頁
文件大?。?/td> 0K
描述: IC ADC 16BIT W/PGA 38-QFN
標(biāo)準(zhǔn)包裝: 52
位數(shù): 16
采樣率(每秒): 15
數(shù)據(jù)接口: I²C,串行
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 480µW
電壓電源: 單電源
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 38-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 38-QFN(5x7)
包裝: 管件
輸入數(shù)目和類型: 16 個單端,雙極;8 個差分,雙極
配用: DC1012A-C-ND - BOARD DELTA SIGMA ADC LTC2495
LTC2495
2495fd
one of 16 channels is selected as the positive input. The
negative input is COM for all single-ended operations.
The remaining four bits (ODD, A2, A1, A0) determine
which channel(s) is/are selected and the polarity (for a
differential input).
Once the first word is written into the device, a second
word may be input in order to select a configuration mode.
The first bit of the second word is the enable bit for the
conversion configuration (EN2). If this bit is set to 0, then
the next conversion is performed using the previously
selected converter configuration.
If the EN2 bit is set to a 1, a new configuration can be
loaded into the device (see Table 4). The first bit (IM) is
used to select the internal temperature sensor. If IM = 1,
the following conversion will be performed on the internal
temperaturesensorratherthantheselectedinputchannel.
The next two bits (FA and FB) are used to set the rejection
frequency. The next bit (SPD) is used to select either the
1x output rate if SPD = 0 (auto-calibration is enabled and
the offset is continuously calibrated and removed from the
final conversion result) or the 2x output rate if SPD = 1
(offset calibration disabled, multiplexing output rates up
to 15Hz with no latency). The final three bits (GS2, GS1,
GS0) are used to set the gain. When IM = 1 (temperature
measurement) SPD, GS2, GS1 and GS0 will be ignored
and the device will operate in 1x mode.
The configuration remains valid until a new input word
with EN = 1 (the first three bits are 101 for the first word)
and EN2 = 1 (for the second write byte) is shifted into
the device.
applications inForMation
Table 4. Converter Configuration
1
0
EN SGL ODD A2 A1 A0 EN2 IM
FA
FB
SPD GS2 GS1 GS0
CONVERTER CONFIGURATION
1
0
Any
Input
Channel
X
Keep Previous
1
0
1
0
X
Keep Previous
1
0
1
0
Any
Rejection
Mode
0
External Input, Gain = 1, Auto-Calibration
1
0
1
0
1
External Input, Gain = 4, Auto-Calibration
1
0
1
0
1
0
External Input, Gain = 8, Auto-Calibration
1
0
1
0
1
External Input, Gain = 16, Auto-Calibration
1
0
1
0
1
0
External Input, Gain = 32, Auto-Calibration
1
0
1
0
1
0
1
External Input, Gain = 64, Auto-Calibration
1
0
1
0
1
0
External Input, Gain = 128, Auto-Calibration
1
0
1
0
1
External Input, Gain = 264, Auto-Calibration
1
0
1
0
1
0
External Input, Gain = 1, 2x Speed
1
0
1
0
1
0
1
External Input, Gain = 2, 2x Speed
1
0
1
0
1
0
1
0
External Input, Gain = 4, 2x Speed
1
0
1
0
1
0
1
External Input, Gain = 8, 2x Speed
1
0
1
0
1
0
External Input, Gain = 16, 2x Speed
1
0
1
0
1
0
1
External Input, Gain = 32, 2x Speed
1
0
1
0
1
0
External Input, Gain = 64, 2x Speed
1
0
1
0
1
External Input, Gain = 128, 2x Speed
1
0
1
0
Any
Speed
Any
Gain
External Input, Simultaneous 50Hz/60Hz Rejection
1
0
1
0
1
External Input, 50Hz Rejection
1
0
1
0
1
0
External Input, 60Hz Rejection
1
0
1
0
1
Reserved, Do Not Use
1
0
1
0
X
Temperature Input, Simultaneous 50Hz/60Hz Rejection
1
0
1
0
1
X
Temperature Input, 50Hz Rejection
1
0
1
0
X
Temperature Input, 60Hz Rejection
1
0
1
X
Reserved, Do Not Use
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