參數(shù)資料
型號(hào)： LTC2205CUK-14#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 14-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC48
封裝： 7 X 7 MM, LEAD FREE, PLASTIC, MO-220WKKD-2, QFN-48
文件頁(yè)數(shù)： 10/28頁(yè)
文件大小： 1572K
代理商： LTC2205CUK-14#TRPBF
LTC2205-14
18
220514fa
Figure 7. A 2.25V Range ADC with an External 2.5V Reference
Reference Operation
Figure 6 shows the LTC2205-14 reference circuitry con-
sisting of a 2.5V bandgap reference, a programmable gain
amplier and control circuit. The LTC2205-14 has 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 2.2F.
The internal programmable gain amplier provides the
internal reference voltage for the ADC. This amplier has
very stringent settling requirements and is not accessible
for external use.
APPLICATIONS INFORMATION
PGA
1.25V
SENSE
VCM
BUFFER
INTERNAL
ADC
REFERENCE
RANGE
SELECT
AND GAIN
CONTROL
2.5V
BANDGAP
REFERENCE
2.2
F
TIE TO VDD TO USE
INTERNAL 2.5V
REFERENCE
OR INPUT FOR
EXTERNAL 2.5V
REFERENCE
OR INPUT FOR
EXTERNAL 1.25V
REFERENCE
220514 F06
LTC2205-14
Figure 6. Reference Circuit
VCM
SENSE
1.25V
3.3V
2.2
F
2.2
F
1
F
220514 F07
LTC2205-14
LTC1461-2.5
2
6
4
Figure 5. DC Coupled Input with Differential Amplier
–
+
AIN
+
AIN
–
2.2
F
12pF
VCM
LTC2205-14
ANALOG
INPUT
220514 F05
CM
AMPLIFIER = LTC6600-20,
LTC1993, ETC.
HIGH SPEED
DIFFERENTIAL
AMPLIFIER
25
25
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 1F (or larger) ceramic capacitor.
相關(guān)PDF資料
PDF描述
LTC2205IUK-14#TRPBF 16-Bit, 65Msps ADC; Package: QFN; No of Pins: 48; Temperature Range: -40°C to +85°C
LTC2206CUK-14#PBF 16-Bit, 80Msps ADC; Package: QFN; No of Pins: 48; Temperature Range: 0°C to +70°C
LTC2206CUK-14#TRPBF 16-Bit, 80Msps ADC; Package: QFN; No of Pins: 48; Temperature Range: 0°C to +70°C
LTC2206IUK-14#PBF 16-Bit, 80Msps ADC; Package: QFN; No of Pins: 48; Temperature Range: -40°C to +85°C
LTC2206IUK-14#TRPBF 16-Bit, 80Msps ADC; Package: QFN; No of Pins: 48; Temperature Range: -40°C to +85°C
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC2205CUK-PBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:16-Bit, 65Msps/40Msps
LTC2205CUK-TR 制造商:LINER 制造商全稱:Linear Technology 功能描述:16-Bit, 65Msps/40Msps
LTC2205CUK-TRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:16-Bit, 65Msps/40Msps
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
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