- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄16923 > AD8264-EVALZ (Analog Devices Inc)BOARD EVAL FOR AD8264 VGA PDF資料下載
參數(shù)資料
| 型號： | AD8264-EVALZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 22/40頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR AD8264 VGA |
| 標準包裝： | 1 |
| 每 IC 通道數(shù)： | 4 - 四 |
| 放大器類型： | 可變增益 |
| 輸出類型： | 差分 |
| 轉(zhuǎn)換速率： | 380 V/µs |
| -3db帶寬： | 235MHz |
| 工作溫度： | -40°C ~ 105°C |
| 電流供應（主 IC）： | 99mA |
| 電壓 - 電源，單路/雙路(±)： | ±2.5 V ~ 5 V |
| 板類型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | AD8264 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁當前第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁
AD8264
Rev. A | Page 29 of 40
IPPx
VPOS
IPNx
VOLx
VOHx
INTERPOLATOR
PREAMP
6dB (2×)
OFSx
OPPx
GAIN
INTERFACE
100
747
107
100
+
–
VOCM
COMM
GNHx
GNLO
BIAS
VNEG
NONINVERTING
AMPLIFIER INPUT
INVERTING AMPLIFIER
INPUT (NOT USED)
POWER
SUPPLIES
VGAx
SINGLE-ENDED HS
VGA OUTPUT
DIFFERENTIAL
VGA OUTPUT
OFFSET
ADJUST
OUTPUT COMMON-MODE
VOLTAGE ADJUSTMENT
DIFFERENTIAL GAIN
CONTROL INPUTS
1.2V p-p MAX @ ±2.5V
2V p-p MAX @ ±3.5V TO ±3.3V
3V p-p MAX@ ±5V (PREAMP
DRIVE LIMITED)
2.3nV/
√Hz
DIFFERENTIAL OUTPUT NEVER LIMITS
BECAUSE VGA LIMITS FIRST.
DIFFERENTIAL OUTPUT SWING = 2x VGA OUT
5.2V p-p MAX @ ±2.5V
8V p-p MAX @ ±3.5V TO ±3.3V
15V p-p MAX @ ±5V
73nV/
√Hz
PREAMP OUTPUT
(NOT USED)
2.6V p-p MAX @ ±2.5V
4V p-p MAX @ ±3.5V TO ±3.3V
7.5V p-p MAX @ ±5V
34nV/
√Hz
COMPOSITE GAIN IS +6dB TO +30dB
ATTENUATOR
–24dB TO 0dB
FIXED GAIN VGA
AMPLIFIER
18dB (8×)
DIFFERENTIAL OUTPUT
AMPLIFIER 6dB (2×)
1k
2k
1k
2k
1
2
3
07736-
081
Figure 111. Single-Channel Block Diagram
POST AMPLIFIER
From the preamp input to the VGA output (VGAx), the gain
is noninverting. As can be seen in Figure 111, the VGAx pins
drive the positive input of the differential amplifier. The gain
is inverting from the input of the preamp to the output pin at
VOLx, and the gain is noninverting to the output VOHx.
Other than the input from VGAx, each differential amplifier
has two additional inputs: VOCM and OFSx. A common
VOCM pin is shared among all four postamplifiers, while
separate OFSx pins are provided for each channel.
VOCM Pin
The VOCM pin sets the common-mode voltage of the differential
output and must be biased by an external voltage. When driving
a dc-coupled ADC, the voltage typically comes from the ADC
reference, as shown in the Applications Information section.
If dc level shift is not necessary, the VOCM pin is connected
to ground.
OFSx Pins
The OFSx pins are the inverting inputs of the differential post
amplifiers and can be used to prebias a differential dc offset at
the output. This is very useful when the input is a unipolar pulse
because the user can set up the gain and the offset in such a way
as to optimally map a unipolar pulse into the full-scale input of
an ADC, while dc coupling throughout.
If dc offset is not desired, then the OFSx pins should be connected
to ground. However, the OFSx pins can also be used as separate
inputs if the user wants this function.
NOISE
At maximum gain, the preamplifier is the primary contributor
of noise and results in a differential output referred noise of
roughly 73 nV/√Hz. The noise at the VGAx outputs is 34 nV/√Hz,
and because of the gain-of-2, the VGA output noise is amplified
by 6 dB to 68 nV/√Hz. The differential amplifier, including the
gain setting resistors, contributes another 26 nV/√Hz, and the
rms sum results in a total noise of 73 nV/√Hz. At the lowest
gain, the noise at the VGA output is approximately 19 nV/√Hz, and
when multiplied by two, it results in 38 nV/√Hz at the differential
output; again, rms summing this with the 26 nV/√Hz of the
differential amplifier causes the total output referred noise to
be approximately 46 nV/√Hz.
The input referred noise to the preamplifier at maximum gain
is 2.3 nV/√Hz and increases with decreasing gain. Note that all
noise numbers include the necessary gain setting resistors.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| X60003BIG3Z-50T1 | IC VREF SERIES PREC 5V SOT-23-3 |
| 381LX471M450A052 | CAP ALUM 470UF 450V 20% SNAP |
| 1-556127-2 | CABLE ASSY PWR-PWR 8 WIRE 116" |
| AD8337-EVALZ-INV | BOARD EVALUATION FOR AD8337 INS |
| EBM30DCTS | CONN EDGECARD 60POS DIP .156 SLD |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD826AN | 制造商:Analog Devices 功能描述:OP Amp Dual Volt Fdbk 制造商:Rochester Electronics LLC 功能描述:DUAL, HIGH SPEED OP AMP - Bulk 制造商:Analog Devices 功能描述:Operational Amplifier (Op-Amp) IC |
| AD826ANZ | 功能描述:IC OPAMP VF 50MHZ DUAL LP 8DIP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:2,500 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| AD826ANZ | 制造商:Analog Devices 功能描述:Operational Amplifier (Op-Amp) IC |
| AD826AR | 功能描述:IC OPAMP VF 50MHZ DUAL LP 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:50 系列:- 放大器類型:J-FET 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:13 V/µs 增益帶寬積:3MHz -3db帶寬:- 電流 - 輸入偏壓:65pA 電壓 - 輸入偏移:3000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應商設(shè)備封裝:8-PDIP 包裝:管件 |
| AD826AR-EBZ | 功能描述:BOARD EVAL FOR AD826AR OPAMP RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 運算放大器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
發(fā)布緊急采購，3分鐘左右您將得到回復。