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參數(shù)資料
| 型號： | LTC1096ACN8 |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 17/32頁 |
| 文件大小： | 0K |
| 描述： | IC A/D CONV 8BIT SRL IN/OUT 8DIP |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 位數(shù)： | 8 |
| 采樣率（每秒）： | 33k |
| 數(shù)據(jù)接口： | 串行 |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 600µW |
| 電壓電源： | 單電源 |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 8-DIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 8-PDIP |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 1 個差分，單極 |
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LTC1096/LTC1096L
LTC1098/LTC1098L
24
10968fc
APPLICATIONS INFORMATION
related to reference voltage for a typical value of VOS. For
example, a VOS of 2mV which is 0.1LSB with a 5V reference
becomes 0.5LSB with a 1V reference and 2.5LSBs with
a 0.2V reference. If this offset is unacceptable, it can be
corrected digitally by the receiving system or by offsetting
the “–” input of the LTC1096.
Noise with Reduced VREF
The total input referred noise of the LTC1096 can be reduced
to approximately 1mV peak-to-peak using a ground plane,
good bypassing, good layout techniques and minimizing
noise on the reference inputs. This noise is insignicant
with a 5V reference but will become a larger fraction of
an LSB as the size of the LSB is reduced.
For operation with a 5V reference, the 1mV noise is only
0.05LSB peak-to-peak. In this case, the LTC1096 noise
will contribute virtually no uncertainty to the output code.
However, for reduced references, the noise may become
a signicant fraction of an LSB and cause undesirable jit-
ter in the output code. For example, with a 1V reference,
this same 1mV noise is 0.25LSB peak-to-peak. This will
reduce the range of input voltages over which a stable
output code can be achieved by 1LSB. If the reference is
further reduced to 200mV, the 1mV noise becomes equal
to 1.25LSBs and a stable code may be difcult to achieve.
In this case averaging readings may be necessary.
This noise data was taken in a very clean setup. Any setup-
induced noise (noise or ripple on VCC, VREF or VIN) will
add to the internal noise. The lower the reference voltage
to be used, the more critical it becomes to have a clean,
noise free setup.
Conversion Speed with Reduced VREF
With reduced reference voltages the LSB step size is
reduced and the LTC1096 internal comparator overdrive
is reduced. Therefore, it may be necessary to reduce
the maximum CLK frequency when low values of VREF
are used.
Input Divider
It is OK to use an input divider on the reference input of
the LTC1096 as long as the reference input can be made
to settle within the bit time at which the clock is running.
When using a larger value resistor divider on the reference
input the “–” input should be matched with an equivalent
resistance.
Bypassing Reference Input with Divider
Bypassing the reference input with a divider is also pos-
sible. However, care must be taken to make sure that the
DC voltage on the reference input will not drop too much
below the intended reference voltage.
AC PERFORMANCE
Two commonly used gures of merit for specifying the
dynamic performance of the ADCs in digital signal pro-
cessing applications are the signal-to-noise ratio (SNR)
and the effective number of bits (ENOBs).
Signal-to-Noise Ratio
The signal-to-noise ratio (SNR) is the ratio between the
RMS amplitude of the fundamental input frequency to
the RMS amplitude of all other frequency components at
the A/D output. This includes distortion as well as noise
products and for this reason it is sometimes referred to as
signal-to-noise + distortion [S/(N + D)]. The output is band
limited to frequencies from DC to one half the sampling
frequency. Figure 11 shows spectral content from DC to
15.625kHz which is 1/2 the 31.25kHz sampling rate.
Figure 11. This Clean FFT of an 11.8kHz Input Shows
Remarkable Performance for an ADC That Draws Only 100μA
When Sampling at the 31.25kHz Rate
FREQUENCY (kHz)
0
AMPLITUDE
(dB)
–60
–30
–20
16
10968 F11
–70
–80
–120
4
8
12
–100
0
–10
–40
–50
–90
–110
2
6
10
14
fSAMPLE = 31.25kHz
fIN = 11.8kHz
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| LTC1096ACN8#PBF | 功能描述:IC A/D CONV 8BIT SRL IN/OUT 8DIP 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:2,500 系列:- 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 |
| LTC1096ACN8-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Micropower Sampling 8-Bit Serial I/O A/D Converters |
| LTC1096ACN8-TR | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Micropower Sampling 8-Bit Serial I/O A/D Converters |
| LTC1096ACN8-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Micropower Sampling 8-Bit Serial I/O A/D Converters |
| LTC1096ACS8 | 功能描述:IC A/D CONV 8BIT SRL IN/OUT8SOIC RoHS:否 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:2,500 系列:- 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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