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參數(shù)資料
| 型號(hào)： | DC1082A-E |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 5/18頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD SAR ADC LTC2356-14 |
| 軟件下載： | QuikEval II System |
| 設(shè)計(jì)資源： | DC1082A Design File DC1082A Schematic |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | QuikEval-II™ |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 14 |
| 采樣率（每秒）： | 3M |
| 數(shù)據(jù)接口： | 串行，SPI? |
| 輸入范圍： | ±1.25 V |
| 已用 IC / 零件： | LTC2356-14 |
| 已供物品： | 板 |
| 相關(guān)產(chǎn)品： | LTC2356CMSE-12#TRPBF-ND - IC ADC 12BIT 3.5MSPS 10-MSOP LTC2356CMSE-14#TRPBF-ND - IC ADC 14BIT 3.5MSPS 10-MSOP LTC2356IMSE-14#TRPBF-ND - IC ADC 14BIT 3.5MSPS 10-MSOP LTC2356IMSE-12#TRPBF-ND - IC ADC 12BIT 3.5MSPS 10-MSOP LTC2356CMSE-14#PBF-ND - IC ADC 14BIT 3.5MSPS 10-MSOP LTC2356IMSE-14#PBF-ND - IC ADC 14BIT 3.5MSPS 10-MSOP LTC2356IMSE-12#PBF-ND - IC ADC 12BIT 3.5MSPS 10-MSOP LTC2356CMSE-12#PBF-ND - IC ADC 12BIT 3.5MSPS 10-MSOP |
LTC2356-12/LTC2356-14
13
2356fb
AIN–
LTC2356-14
AIN+
C1
47pF TO
1000pF
1
R1
51
C3
1F
C5
0.1F
5V
–5V
C4
1F
R5
1k
1.5VCM
R3
499
R4
499
R6
1k
C2
47pF TO
1000pF
R2
51
C6
0.1F
VIN
1.25VP-P
MAX
2356 F06a
–
+
U1
1/2 LT1819
–
+
U2
1/2 LT1819
INPUT VOLTAGE (V)
2’S
COMPLEMENT
OUTPUT
CODE
2356 F05
011...111
011...110
011...101
100...000
100...001
100...010
FS – 1LSB
–FS
FREQUENCY (Hz)
100
CMRR
(dB)
0
–20
–40
–60
–80
–100
–120
1k
10k
100k
1M
2356 F04
10M 100M
APPLICATIONS INFORMATION
Figure 3. The voltage of the external reference must be
higher than the 2.5V output of the internal reference. The
recommended range for an external reference is 2.55V to
VDD. An external reference at 2.55V will see a DC quiescent
load of 0.75mA and as much as 3mA during conversion.
INPUT SPAN VERSUS REFERENCE VOLTAGE
The differential input range has a bipolar ± VREF/2
voltage span that equals the difference between the
voltage at the reference buffer output VREF at Pin 3, and
the voltage at the ground (Exposed Pad Ground). The
differential input range of the ADC is ±1.25V when using
the internal reference. The internal ADC is referenced to
these two nodes. This relationship also holds true with
an external reference.
DIFFERENTIAL INPUTS
The LTC2356-12/LTC2356-14 have a unique differential
sample-and-holdcircuitthatmeasuresinputvoltagesfrom
ground to VDD. The ADC will always convert the bipolar
difference of AIN+ – AIN–, independent of the common
mode voltage at the inputs. The common mode rejection
holds up at extremely high frequencies, see Figure 4. The
only requirement is that both inputs not go below ground
or exceed VDD. Integral nonlinearity errors (INL) and dif-
ferential nonlinearity errors (DNL) are largely independent
of the common mode voltage. However, the offset error
will vary. The change in offset error is typically less than
0.1% of the common mode voltage.
Figure 5 shows the ideal input/output characteristics for
the LTC2356-12/LTC2356-14. The code transitions occur
midway between successive integer LSB values (i.e.,
0.5LSB, 1.5LSB, 2.5LSB, FS – 1.5LSB). The output code
is 2’s complement with 1LSB = 2.5V/16384 = 153V for
the LTC2356-14, and 1LSB = 2.5V/4096 = 610V for the
LTC2356-12. The LTC2356-14 has 1LSB RMS of random
white noise. Figure 6a shows the LTC1819 converting a
single ended input signal to differential input signals for
optimum THD and SFDR performance as shown in the
FFT plot (Figure 6b).
Figure 4. CMRR vs Frequency
Figure 5. LTC2356-12/LTC2356-14 Transfer Characteristic
Figure 6a. The LT1819 Driving the LTC2356-14 Differentially
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| DC1082A-F | 功能描述:BOARD SAR ADC LTC2355-14 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:QuikEval-II™ 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
| DC1083A-A | 功能描述:BOARD DEMO LTM4603 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:µModule® 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:DC/DC，步降 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:3.3V 電流 - 輸出:3A 輸入電壓:4.5 V ~ 28 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):降壓 頻率 - 開關(guān):250kHz 板類型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名稱:497-12113STEVAL-ISA094V1-ND |
| DC1083A-B | 功能描述:BOARD DEMO LTM4603HV RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:µModule® 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:DC/DC，步降 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:3.3V 電流 - 輸出:3A 輸入電壓:4.5 V ~ 28 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):降壓 頻率 - 開關(guān):250kHz 板類型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名稱:497-12113STEVAL-ISA094V1-ND |
| DC1084A-A | 功能描述:BOARD DEMO LTM4602 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:µModule® 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:DC/DC，步降 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:3.3V 電流 - 輸出:3A 輸入電壓:4.5 V ~ 28 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):降壓 頻率 - 開關(guān):250kHz 板類型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名稱:497-12113STEVAL-ISA094V1-ND |
| DC1084A-B | 功能描述:BOARD DEMO LTM4602HV RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:µModule® 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:DC/DC，步降 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:3.3V 電流 - 輸出:3A 輸入電壓:4.5 V ~ 28 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):降壓 頻率 - 開關(guān):250kHz 板類型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名稱:497-12113STEVAL-ISA094V1-ND |
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