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參數(shù)資料
| 型號： | LTC2494IUHF#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 13/38頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT W/PGA 38-QFN |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 15 |
| 數(shù)據(jù)接口： | MICROWIRE?，串行，SPI? |
| 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： | -40°C ~ 85°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： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 16 個單端，雙極；8 個差分，雙極 |
| 配用： | DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
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LTC2494
0
2494fd
= 1 (offset calibration disabled, multiplexing output rates
up to 15Hz with no latency). When IM = 1 (temperature
measurement), SPD, GS2, GS1, GS0 will be ignored and
the device will operate in 1x mode. The final 3 bits (GS2,
GS1, GS0) are used to select the gain. The configuration
remains valid until a new input word with EN = 1 (the first
3 bits are 101) and EN2 = 1 is shifted into the device.
Rejection Mode (FA, FB)
The LTC2494 includes a high accuracy on-chip oscillator
with no required external components. Coupled with an
integrated 4th order digital low pass filter, the LTC2494 re-
jectslinefrequencynoise.Inthedefaultmode,theLTC2494
simultaneously rejects 50Hz and 60Hz by at least 87dB. If
more rejection is required, the LTC2494 can be configured
to reject 50Hz or 60Hz to better than 110dB.
Speed Mode (SPD)
Every conversion cycle, two conversions are combined to
remove the offset (default mode). This result is free from
offset and drift. In applications where the offset is not
critical, the auto-calibration feature can be disabled with
the benefit of twice the output rate. While operating in the
2x mode (SPD = 1), the linearity and full-scale errors are
unchanged from the 1x mode performance. In both the 1x
and 2x mode there is no latency. This enables input steps
or multiplexer changes to settle in a single conversion
cycle easing system overhead and increasing the effective
conversionrate.Duringtemperaturemeasurements,the1x
mode is always used independent of the value of SPD.
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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| LTC2495CUHF#PBF | 功能描述:IC ADC 16BIT W/PGA 38-QFN RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
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