|
|
VCA2614のメーカーはBurr-Brown Corporationです、この部品の機能は「Dual/ VARIABLE GAIN AMPLIFIER with Input Buffer」です。 |
部品番号 | VCA2614 |
| |
部品説明 | Dual/ VARIABLE GAIN AMPLIFIER with Input Buffer | ||
メーカ | Burr-Brown Corporation | ||
ロゴ | |||
このページの下部にプレビューとVCA2614ダウンロード(pdfファイル)リンクがあります。 Total 15 pages
VCA2614
VCA2614
SBOS185D – JANUARY 2001 – REVISED MARCH 2003
Dual, VARIABLE GAIN AMPLIFIER
with Input Buffer
FEATURES
q GAIN RANGE: 40dB
q 40MHz BANDWIDTH
q LOW CROSSTALK: 70dB at Max Gain, 5MHz
q HIGH-SPEED VARIABLE GAIN ADJUST
q POWER SHUTDOWN MODE
q HIGH IMPEDANCE INPUT BUFFER
APPLICATIONS
q ULTRASOUND SYSTEMS
q GAMMA CAMERAS
q WIRELESS RECEIVERS
q TEST EQUIPMENT
CP2A
CP1A
DESCRIPTION
The VCA2614 is a highly integrated, dual receive channel,
Variable Gain Amplifier (VGA) with analog gain control.
The VCA2614’s VGA section consists of two parts: the Volt-
age Controlled Attenuator (VCA) and the Programmable Gain
Amplifier (PGA). The gain and gain range of the PGA can be
digitally programmed. The combination of these two program-
mable elements results in a variable gain ranging from 0dB up
to a maximum gain as defined by the user through external
connections. The single-ended unity gain input buffer provides
predictable high input impedance. The output of the VGA can
be used in either a single-ended or differential mode to drive
high-performance Analog-to-Digital Converters (ADCs). A sepa-
rate power-down pin reduces power consumption.
The VCA2614 also features low crosstalk and outstanding
distortion performance. The combination of low noise and gain
range programmability makes the VCA2614 a versatile build-
ing block in a number of applications where noise perfor-
mance is critical. The VCA2614 is available in a TQFP-32
package.
VCA2614
(1 of 2 Channels)
Voltage
INA
Buffer
Control
Attenuator
Programmable
Gain Amplifier
NOUTA
POUTA
VCACNTL
Analog
Control
Maximum Gain
Select
MGS1
MGS2
MGS3
Maximum
Gain Select
Voltage
INB
Buffer
Control
Attenuator
Programmable
Gain Amplifier
NOUTB
POUTB
CP2B
CP1B
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
www.ti.com
Copyright © 2001-2003, Texas Instruments Incorporated
1 Page PIN CONFIGURATION
Top View
+INA 1
NC 2
VDDR 3
VBIAS 4
VCM 5
GNDR 6
NC 7
+INB 8
VCA2614
24 VCACNTL
23 MGS3
22 MGS2
21 MGS1
20 PD
19 NC
18 NC
17 DNC
TQFP
PIN DESCRIPTIONS
PIN DESIGNATOR
1 +INA
2 NC
3 VDDR
4 VBIAS
5 VCM
6 GNDR
7 NC
8 +INB
9 NC
10 DNC
11 CP2B
12 CP1B
13 VDDB
14 GNDB
15 POUTB
16 NOUTB
DESCRIPTION
Input Channel A
No Internal Connection
Internal Reference Supply
Bias Voltage
Common-Mode Voltage
Internal Reference Ground
No Internal Connection
Input Channel B
No Internal Connection
Do Not Connect
Coupling Capacitor Channel B
Coupling Capacitor Channel B
+5V Supply Channel B
Ground Channel B
Positive Output Channel B
Negative Output Channel B
PIN
DESIGNATOR
DESCRIPTION
17
DNC
Do Not Connect
18 NC No Internal Connection
19 NC No Internal Connection
20 PD Power Down (Active LOW)
21
MGS1
Maximum Gain Select 1 (MSB)
22
MGS2
Maximum Gain Select 2
23
MGS3
Maximum Gain Select 3 (LSB)
24
VCACNTL
VCA Analog Control
25
NOUTA
Negative VCA Output Channel A
26
POUTA
Positive VCA Output Channel A
27
GNDA
Ground Channel A
28
VDDA
+5V Supply Channel A
29
CP1A
Coupling Capacitor Channel A
30
CP2A
Coupling Capacitor Channel A
31
DNC
Do Not Connect
32 NC No Internal Connection
VCA2614
SBOS185D
www.ti.com
3
3Pages TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VDD = 5V, load resistance = 500Ω on each output to ground, differential output (2Vp-p) MGS = 011, and fIN = 5MHz, unless otherwise noted.
NOISE FIGURE vs VCACNTL
55
50
45
40
35
30
25
20
15
10
5
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
VCACNTL (V)
–30
–35
–40
–45
–50
–55
–60
–65
–70
–75
100k
HARMONIC DISTORTION vs FREQUENCY
(Differential, 2Vp-p, MGS = 001)
VCACNTL = 0.2V, H2
VCACNTL = 0.2V, H3
VCACNTL = 3.0V, H2
VCACNTL = 3.0V, H3
1M
Frequency (Hz)
10M
–30
–35
–40
–45
–50
–55
–60
–65
–70
–75
–80
–85
–90
100k
HARMONIC DISTORTION vs FREQUENCY
(Differential, 2Vp-p, MGS = 011)
VCACNTL = 0.2V, H2
VCACNTL = 0.2V, H3
VCACNTL = 3.0V, H2
VCACNTL = 3.0V, H3
1M
Frequency (Hz)
10M
–30
–35
–40
–45
–50
–55
–60
–65
–70
–75
–80
100k
HARMONIC DISTORTION vs FREQUENCY
(Differential, 2Vp-p, MGS = 111)
VCACNTL = 0.2V, H2
VCACNTL = 0.2V, H3
VCACNTL = 3.0V, H2
VCACNTL = 3.0V, H3
1M
Frequency (MHz)
10M
–30
–35
–40
–45
–50
–55
–60
–65
–70
–75
–80
–85
–90
100k
HARMONIC DISTORTION vs FREQUENCY
(Single-Ended, 1Vp-p, MGS = 001)
VCACNTL = 0.2V, H2
VCACNTL = 0.2V, H3
VCACNTL = 3.0V, H2
VCACNTL = 3.0V, H3
1M
Frequency (Hz)
10M
–30
–35
–40
–45
–50
–55
–60
–65
–70
–75
–80
–85
–90
100k
HARMONIC DISTORTION vs FREQUENCY
(Single-Ended, 1Vp-p, MGS = 011)
1M
Frequency (Hz)
VCACNTL = 0.2V, H2
VCACNTL = 0.2V, H3
VCACNTL = 3.0V, H2
VCACNTL = 3.0V, H3
10M
6
www.ti.com
VCA2614
SBOS185D
6 Page | |||
ページ | 合計 : 15 ページ | ||
|
PDF ダウンロード | [ VCA2614 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
VCA2611 | (VCA2611 / VCA2616) Variable-Gain Amplifier | Burr-Brown |
VCA2612 | TMDual/ VARIABLE GAIN AMPLIFIER with Low Noise Preamp | Burr-Brown Corporation |
VCA2612 | VCA2612: Dual Variable Gain Amplifier with Low Noise Preamp (Rev. C) | Texas Instruments |
VCA2613 | Dual/ VARIABLE GAIN AMPLIFIER with Low-Noise Preamp | Burr-Brown Corporation |