- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377746 > LTC1419C (Linear Technology Corporation) 14-Bit, 800ksps Sampling A/D Converter with Shutdown PDF資料下載
參數(shù)資料
| 型號(hào)： | LTC1419C |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 14-Bit, 800ksps Sampling A/D Converter with Shutdown |
| 中文描述： | 14位，800ksps與關(guān)機(jī)采樣A / D轉(zhuǎn)換器 |
| 文件頁數(shù)： | 11/20頁 |
| 文件大?。?/td> | 401K |
| 代理商： | LTC1419C |
11
LTC1419
many applications. For example, Figure 7 shows a 1000pF
capacitor from +A
IN
to ground and a 100
source resistor
to limit the input bandwidth to 1.6MHz. The 1000pF
capacitor also acts as a charge reservoir for the input
sample-and-hold and isolates the ADC input from sam-
pling glitch sensitive circuitry. High quality capacitors and
resistors should be used since these components can add
distortion. NPO and silver mica type dielectric capacitors
have excellent linearity. Carbon surface mount resistors can
also generate distortion from self heating and from damage
that may occur during soldering. Metal film surface mount
resistors are much less susceptible to both problems.
Input Range
The
±
2.5V input range of the LTC1419 is optimized for low
noise and low distortion. Most op amps also perform well
over this same range, allowing direct coupling to the
analog inputs and eliminating the need for special transla-
tion circuitry.
Some applications may require other input ranges. The
LTC1419 differential inputs and reference circuitry can
accommodate other input ranges often with little or no
additional circuitry. The following sections describe the
reference and input circuitry and how they affect the input
range.
Internal Reference
The LTC1419 has an on-chip, temperature compensated,
curvature corrected, bandgap reference that is factory
trimmed to 2.500V. It is connected internally to a reference
amplifier and is available at V
REF
(Pin 3) see Figure 8a. A
APPLICATIO
S I
FOR
ATIO
U
W
U
U
1
2
3
0.1
μ
F
10
μ
F
ANALOG
INPUT
1419 F08b
LT1019A-2.5
V
OUT
V
IN
5V
+A
IN
–A
IN
V
REF
REFCOMP
LTC1419
AGND
5
4
+
Figure 8b. Using the LT1019-2.5 as an External Reference
2k resistor is in series with the output so that it can be
easily overdriven by an external reference or other
circuitry, see Figure 8b. The reference amplifier gains the
voltage at the V
REF
pin by 1.625 to create the required
internal reference voltage. This provides buffering be-
tween the V
REF
pin and the high speed capacitive DAC. The
reference amplifier compensation pin (REFCOMP, Pin 4)
must be bypassed with a capacitor to ground. The refer-
ence amplifier is stable with capacitors of 1
μ
F or greater.
For the best noise performance a 10
μ
F ceramic or 10
μ
F
tantalum in parallel with a 0.1
μ
F ceramic is recommended.
The V
REF
pin can be driven with a DAC or other means
shown in Figure 9. This is useful in applications where the
peak input signal amplitude may vary. The input span of
the ADC can then be adjusted to match the peak input
signal, maximizing the signal-to-noise ratio. The filtering
of the internal LTC1419 reference amplifier will limit the
bandwidth and settling time of this circuit. A settling time
of 5ms should be allowed for after a reference adjustment.
Figure 8a. LTC1419 Reference Circuit
Figure 9. Driving V
REF
with a DAC
LTC1419
+A
IN
ANALOG INPUT
1.25V TO 3V
DIFFERENTIAL
–A
IN
V
REF
REFCOMP
AGND
1419 F09
1
2
3
4
5
10
μ
F
LTC1450
1.25V TO 3V
R2
40k
R3
64k
REFERENCE
AMP
10
μ
F
REFCOMP
AGND
V
REF
R1
2k
BANDGAP
REFERENCE
3
4
5
2.500V
4.0625V
LTC1419
1419 F08a
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1419CG | 14-Bit, 800ksps Sampling A/D Converter with Shutdown |
| LTC1419CSW | 14-Bit 200KSPS ADC Ser. Out, Auto PWRDN, Single Ended Input 8-SOIC -40 to 85 |
| LTC1419I | 14-Bit, 800ksps Sampling A/D Converter with Shutdown |
| LTC1419ISW | 14-Bit 200KSPS ADC Ser. Out, Auto PWRDN, Single Ended Input 8-MSOP -40 to 85 |
| LTC1419 | 14-Bit, 800ksps Sampling A/D Converter with Shutdown(12位, 800ksps,采樣模數(shù)轉(zhuǎn)換器(帶關(guān)斷)) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1419CG | 功能描述:IC A/D CONV 14BIT SAMPLNG 28SSOP 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:1 系列:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個(gè)單端，雙極 |
| LTC1419CG#PBF | 功能描述:IC A/D CONV 14BIT SAMPLNG 28SSOP 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 系列:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個(gè)單端，雙極 |
| LTC1419CG#TR | 功能描述:IC ADC 14BIT 800KSPS SHDN 28SSOP 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:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 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:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個(gè)單端，單極；1 個(gè)單端，雙極 |
| LTC1419CG#TRPBF | 功能描述:IC A/D CONV 14BIT SAMPLNG 28SSOP 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):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 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:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個(gè)單端，單極；1 個(gè)單端，雙極 |
| LTC1419CGPBF | 制造商:Linear Technology 功能描述:LTC1419CGPBF |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。