參數(shù)資料
型號： MCP6S28
廠商： Microchip Technology Inc.
元件分類： FPGA
英文描述： 400000 SYSTEM GATE 2.5 VOLT FPGA - NOT RECOMMENDED for NEW DESIGN
中文描述： 單端，軌至軌I / O，低增益美國PGA
文件頁數(shù)： 16/43頁
文件大?。?/td> 880K
代理商： MCP6S28
MCP6S21/2/6/8
DS21117A-page 16
2003 Microchip Technology Inc.
4.0
ANALOG FUNCTIONS
The MCP6S21/2/6/8 family of Programmable Gain
Amplifiers (PGA) are based on simple analog building
blocks (see Figure 4-1). Each of these blocks will be
explained in more detail in the following sub-sections.
FIGURE 4-1:
PGA Block Diagram.
4.1
Input MUX
The MCP6S21 has one input, the MCP6S22 and
MCP6S25 have two inputs, the MCP6S26 has six
inputs and the MCP6S28 has eight inputs (see
Figure 4-1).
For the lowest input current, float unused inputs. Tying
these pins to a voltage near the used channels also
works well. For simplicity, they can be tied to V
SS
or
V
DD
, but the input current may increase.
The one channel MCP6S21 has the lowest input bias
current, while the eight channel MCP6S28 has the
highest. There is about a 2:1 ratio in I
B
between these
parts.
4.2
Internal Op Amp
The internal op amp provides the right combination of
bandwidth, accuracy and flexibility.
4.2.1
COMPENSATION CAPACITORS
The internal op amp has three compensation capaci-
tors connected to a switching network. They are
selected to give good small signal bandwidth at high
gains, and good slew rate (full power bandwidth) at low
gains. The change in bandwidth as gain changes is
between 2 MHz and 12 MHz. Refer to Table 4-1 for
more information.
TABLE 4-1:
GAIN VS. INTERNAL COMPENSATION CAPACITOR
Internal
Compensation
Capacitor
MCP6S21
–One input (CH0), no SO pin
MCP6S22
–Two inputs (CH0, CH1), V
REF
tied internally
to V
SS
, no SO pin
MCP6S26
–Six inputs (CH0 to CH5)
MCP6S28
–Eight inputs (CH0 to CH7)
V
OUT
V
REF
V
DD
CS
SI
SO
SCK
CH1
CH2
CH0
CH3
CH4
CH5
CH6
CH7
V
SS
8
R
F
R
G
MUX
SPI
Logic
POR
Gain
Switches
+
-
R
L
)
Gain
(V/V)
Typical GBWP
(MHz)
Typical SR
(V/μs)
Typical FPBW
(MHz)
Typical BW
(MHz)
1
2
4
5
8
Large
Large
Medium
Medium
Medium
Medium
Small
Small
12
12
20
20
20
20
64
64
4.0
4.0
11
11
11
11
22
22
0.30
0.30
0.70
0.70
0.70
0.70
1.6
1.6
12
6
10
7
2.4
2.0
5
2.0
10
16
32
Note 1:
FPBW is the Full Power Bandwidth. These numbers are based on V
DD
= 5.0V.
2:
No changes in DC performance (e.g., V
OS
) accompany a change in compensation capacitor.
3:
BW is the closed-loop, small signal -3 dB bandwidth.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCP6S28-I/P 功能描述:特殊用途放大器 8-Chan. 12 MHz SPI RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel
MCP6S28-I/SL 功能描述:特殊用途放大器 8-Chan. 12 MHz SPI RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel
MCP6S28-I/SL 制造商:Microchip Technology Inc 功能描述:Operational Amplifier (Op-Amp) IC
MCP6S28T-I/SL 功能描述:特殊用途放大器 8-Chan. 12 MHz SPI RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel
MCP6S2XEV 功能描述:放大器 IC 開發(fā)工具 MCP6S2X PGA Eval Brd RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V
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