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| 型号： | AD8260ACPZ-WP |
| 厂商： | Analog Devices Inc |
| 文件页数： | 14/32页 |
| 文件大小： | 0K |
| 描述： | IC AMP VGA DIFF LN 310MA 32LFCSP |
| 标准包装： | 36 |
| 放大器类型： | 可变增益 |
| 电路数： | 1 |
| 输出类型： | 差分 |
| 转换速率： | 730 V/µs |
| -3db带宽： | 195MHz |
| 电流 - 输入偏压： | 200nA |
| 电流 - 电源： | 28.3mA |
| 电流 - 输出 / 通道： | 310mA |
| 电压 - 电源，单路/双路(±)： | 3.3 V ~ 10 V，±3.3 V ~ 5 V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 32-LFCSP-VQ |
| 包装： | 托盘 - 晶粒 |
| 配用： | AD8260-EVALZ-ND - BOARD EVAL FOR AD8260 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页当前第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
AD8260
Rev. A | Page 21 of 32
32
2
3
6
31
30
1.5k
1k
29
27
26
25
1k
1.5k
GM
9
24
23
22
21
VMID
4
×1
1
AD8260
VMDO
TXEN
VMDI
VNCM
VPSB
ENBL
VGAP
VGAN
V
NG
R
VPSR
G
NS
3
G
NS
2
G
NS
1
G
NS
0
P
RAO
V
NG
R
VOCM
INPP
INRP
INRN
INP
N
TX
FB
VN
EG
VN
EG
TXOP
VPOS
VPSR
VMDO
PRAI
FDBK
07192-
053
50
0.1F
0V, 1.8V/3.3V
5
3.3V
7
8
0.1F
1.8V OR 3.3V
ADC
FS INPUT
2V p-p
INP
INN
10
3.3V
11
12
13
14
16
15
17
18
19
RFB1
100
RFB2
100
0.1F
20
3.3V
0.1F
POWERLINE
CABLE, ETC.
OPTIONAL CLAMP DIODES
AND SNUBBING RESISTORS
0.1F
50
1.8V OR 3.3V
20mA DAC
1V MAX WITH
200mA pk
BIAS
ATTENUATOR
GM STAGES
LOGIC
28
CFB
OPTIONAL USER SELECTED
CFB REDUCES HF PEAKING
WITH CAPACITIVE LOADING
LOW-PASS
AA FILTER
+
–
Figure 64. Block Diagram and Basic Application Connections
HIGH CURRENT DRIVER AMPLIFIER
The high current driver amplifier can deliver very large output
currents suitable for driving complex impedances, such as a
power line, a 50 Ω line, or a coaxial cable. The input of the
amplifier is fully differential and intended to be driven by a
differential current-output DAC, as shown in Figure 64. The
differential input signal is amplified by 1.5× and produces a
2.25 V p-p single-ended output signal from a 1.5 V p-p input
signal. A DAC with 15 mA maximum output current into a
50 load provides 1.5 V p-p of input voltage and results in
2.25 V p-p at the output. A DAC whose output is 20 mA produces
an output swing of 3 V p-p (neglecting a small gain error when
driving the parallel combination of the 50 load-resistor and the
internal 1 k gain resistor of the AD8260).
For a 3.3 V supply rail, the maximum limit of the output voltage
is 3 V p-p and distorts severely if exceeded. The recommended
output for optimum distortion is 2 V p-p for a 3.3 V supply.
Correspondingly, larger output swings are accommodated for
higher supply voltages such as +5 V or ±5 V.
For optimum distortion, the input drive must be controlled
such that the output swing is well within saturation levels
established by the supply rail. The output swing can be reduced
by using load resistors with values less than 50 Ω or by reducing
the amplifier gain by connecting external resistors in parallel
with the internal 1 k and 1.5 k resistors between Pin 27,
Pin 28, and Pin 29, and between Pin 30, Pin 31, and Pin 32.
Coincidently, noise is reduced because the gain setting resistors
are the primary noise sources of the high current driver amplifier.
The output-referred noise is 14 nV/√Hz, of which 11 nV/√Hz is
due to the gain setting resistors. Matching of the gain setting
resistors is important for good common-mode rejection and the
accuracy of the differential gain. If external resistors are used,
their accuracy should be at least ±1%. How low the resistor
values can be is primarily determined by the quality of the ac
ground at Pin VOCM; as the gain setting resistors decrease in
value, the dynamic current increases, and the quality of the
decoupling capacitors needs to increase correspondingly.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8260-EVALZ | 功能描述:BOARD EVAL FOR AD8260 RoHS:是 类别:编程器，开发系统 >> 评估板 - 运算放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
| AD8264 | 制造商:AD 制造商全称:Analog Devices 功能描述:Quad, 235 MHz, DC-Coupled VGA and Differential Output Amplifier |
| AD8264ACPZ | 功能描述:IC AMP VGA DIFF QUAD LN 40LFCSP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.028 V/µs 增益带宽积:105kHz -3db带宽:- 电流 - 输入偏压:3nA 电压 - 输入偏移:100µV 电流 - 电源:3.3µA 电流 - 输出 / 通道:12mA 电压 - 电源，单路/双路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:剪切带 (CT) 其它名称:OP481GRUZ-REELCT |
| AD8264ACPZ-R7 | 功能描述:IC AMP VGA DIFF QUAD LN 40LFCSP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:J-FET 电路数:2 输出类型:- 转换速率:3.5 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:30pA 电压 - 输入偏移:2000µV 电流 - 电源:200µA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-PDIP 包装:管件 |
| AD8264ACPZ-RL | 功能描述:IC AMP VGA DIFF QUAD LN 40LFCSP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:Excalibur™ 放大器类型:J-FET 电路数:1 输出类型:- 转换速率:45 V/µs 增益带宽积:10MHz -3db带宽:- 电流 - 输入偏压:20pA 电压 - 输入偏移:490µV 电流 - 电源:1.7mA 电流 - 输出 / 通道:48mA 电压 - 电源，单路/双路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:带卷 (TR) |
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