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參數(shù)資料
| 型號： | LTC2205CUK#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | 16-Bit, 65Msps ADC; Package: QFN; No of Pins: 48; Temperature Range: 0°C to +70°C |
| 中文描述： | 1-CH 16-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC48 |
| 封裝： | 7 X 7 MM, LEAD FREE, PLASTIC, MO-220WKKD-2, QFN-48 |
| 文件頁數(shù)： | 16/36頁 |
| 文件大小： | 1367K |
| 代理商： | LTC2205CUK#TRPBF |
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LTC2205/LTC2204
23
22054fc
Figure 5. DC Coupled Input with Differential Amplier
–
+
AIN
+
AIN
–
2.2μF
12pF
VCM
LTC2205/
LTC2204
ANALOG
INPUT
22054 F05
CM
AMPLIFIER = LTC6600-20,
LTC1993, ETC.
HIGH SPEED
DIFFERENTIAL
AMPLIFIER
25Ω
PGA
1.25V
SENSE
VCM
BUFFER
INTERNAL
ADC
REFERENCE
RANGE
SELECT
AND GAIN
CONTROL
2.5V
BANDGAP
REFERENCE
2.2μF
TIE TO VDD TO USE
INTERNAL 2.5V
REFERENCE
OR INPUT FOR
EXTERNAL 2.5V
REFERENCE
OR INPUT FOR
EXTERNAL 1.25V
REFERENCE
22054 F06
LTC2205/
LTC2204
Figure 6. Reference Circuit
Direct Coupled Circuits
Figure 5 demonstrates the use of a differential amplier to
convert a single ended input signal into a differential input
signal. The advantage of this method is that it provides
low frequency input response; however, the limited gain
bandwidth of any op amp or closed-loop amplier will
degradetheADCSFDRathighinputfrequencies.Additionally,
wideband op amps or differential ampliers tend to have
high noise. As a result, the SNR will be degraded unless the
noise bandwidth is limited prior to the ADC input.
APPLICATIONS INFORMATION
very stringent settling requirements and is not accessible
for external use.
The SENSE pin can be driven ±5% around the nominal 2.5V
or 1.25V external reference inputs. This adjustment range
can be used to trim the ADC gain error or other system
gain errors. When selecting the internal reference, the
SENSE pin should be tied to VDD as close to the converter
as possible. If the sense pin is driven externally it should
be bypassed to ground as close to the device as possible
with 1μF (or larger) ceramic capacitor.
Reference Operation
Figure 6 shows the LTC2205/LTC2204 reference circuitry
consisting of a 2.5V bandgap reference, a programmable
gain amplier and control circuit. The LTC2205/LTC2204
have three modes of reference operation: Internal
Reference, 1.25V external reference or 2.5V external
reference. To use the internal reference, tie the SENSE pin
to VDD. To use an external reference, simply apply either
a 1.25V or 2.5V reference voltage to the SENSE input
pin. Both 1.25V and 2.5V applied to SENSE will result in
a full scale range of 2.25VP-P (PGA = 0). A 1.25V output,
VCM is provided for a common mode bias for input drive
circuitry. An external bypass capacitor is required for the
VCM output. This provides a high frequency low impedance
path to ground for internal and external circuitry. This is
also the compensation capacitor for the reference; it will
not be stable without this capacitor. The minimum value
required for stability is 2.2μF.
The internal programmable gain amplier provides the
internal reference voltage for the ADC. This amplier has
Figure 7. A 2.25V Range ADC with
an External 2.5V Reference
VCM
SENSE
1.25V
3.3V
2.2μF
1μF
22054 F07
LTC2205/
LTC2204
LT1461-2.5
2
6
4
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| LTC2205IUK#PBF | 16-Bit, 65Msps ADC; Package: QFN; No of Pins: 48; Temperature Range: -40°C to +85°C |
| LTC2205IUK#TRPBF | 16-Bit, 65Msps ADC; Package: QFN; No of Pins: 48; Temperature Range: -40°C to +85°C |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC2205IUK | 制造商:Linear Technology 功能描述:Single ADC Pipelined 65Msps 16-bit Parallel 48-Pin QFN EP |
| LTC2205IUK#PBF | 制造商:Linear Technology 功能描述:Single ADC Pipelined 65Msps 16-bit Parallel 48-Pin QFN EP 制造商:Linear Technology 功能描述:IC ADC 16-BIT 65MSPS 48-QFN 制造商:Linear Technology 功能描述:MS-ADC/High Speed, 16-bit, 65Msps ADC 制造商:Linear Technology 功能描述:IC, ADC, 16BIT, 65MSPS, QFN-48, Resolution (Bits):16bit, Sampling Rate:65MSPS, Supply Voltage Type:Single, Supply Voltage Min:3.135V, Supply Voltage Max:3.465V, Supply Current:185mA, Digital IC Case Style:QFN, No. of Pins:48 , RoHS Compliant: Yes |
| LTC2205IUK#TRPBF | 制造商:Linear Technology 功能描述:IC ADC 16-BIT 65MSPS 48-QFN |
| LTC2205IUK-14 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:14-Bit, 65Msps ADC |
| LTC2205IUK-14#PBF | 功能描述:IC ADC 14BIT 65MSPS 48-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:- 標準包裝: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） 供應商設備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個單端，雙極 |
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