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| 型号： | AD9203ARUZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 10BIT 40MSPS 3V 28-TSSOP |
| 标准包装： | 50 |
| 位数： | 10 |
| 采样率（每秒）： | 40M |
| 数据接口： | 并联 |
| 转换器数目： | 5 |
| 功率耗散（最大）： | 108mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 管件 |
| 输入数目和类型： | 2 个单端，单极；1 个差分，单极 |
| 产品目录页面： | 780 (CN2011-ZH PDF) |
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AD9203
Rev. B | Page 15 of 28
AD8051:
f–3 dB = 110 MHz. Low cost. Best used for driving
single-ended ac-coupled configuration. Operates on a 3 V
power rail.
AD8052:
Dual Version of above amp.
AD8138
is a higher performance version of AD8131. Its gain is
programmable and provides 14-bit performance.
DIFFERENTIAL MODE OF OPERATION
Since not all applications have a signal preconditioned for
differential operation, there is often a need to perform a single-
ended-to-differential conversion. In systems that do not need a
dc input, an RF transformer with a center tap is one method to
generate differential inputs beyond 20 MHz for the AD9203.
This provides all the benefits of operating the A/D in the
differential mode without contributing additional noise or
distortion. An RF transformer also has the benefit of providing
electrical isolation between the signal source and the A/D.
An improvement in THD and SFDR performance can be
realized by operating the AD9203 in differential mode. The
performance enhancement between the differential and single-
ended mode is greatest as the input frequency approaches and
goes beyond the Nyquist frequency (i.e., fIN > FS/2).
The AD8138 provides a convenient method of converting a
single-ended signal to a differential signal. This is an ideal
method for generating a direct coupled signal to the AD9203.
The AD8138 will accept a signal and shift it to an externally
provided common-mode level. The AD8138 configuration is
shown in Figure 28.
00573-
028
49.9
10k
523
499
10k
20pF
49.9
20pF
499
499
AINP
3V
DRVDD
AVDD
AVSS DRVSS
AINN
DIGITAL
OUTPUTS
3V
5
6
2
28
25
26
27
1
8
2
1
3
4
AD9203
49.9
AD8138
10
F
0.1
F
0.1
F
0.1
F
10
F
0.1
F
Figure 28. AD8138 Driving an AD9203, a 10-Bit, 40 MSPS A/D Converter
Figure 29 shows the schematic of a suggested transformer
circuit. The circuit uses a Minicircuits RF transformer, model
number T4–1T, which has an impedance ratio of four (turns
ratio of 2).
00573-029
AINP
AINN
VREF
REFSENSE
2V
1V
AD9203
0.1
F
10
F
Figure 29. Transformer Coupled Input
The center tap of the transformer provides a convenient means
of level-shifting the input signal to a desired common-mode
voltage. Figure 30 illustrates the performance of the AD9203
over a wide range of common-mode levels.
Transformers with other turns ratios may also be selected to
optimize the performance of a given application. For example,
selecting a transformer with a higher impedance ratio, such as
minicircuits T16–6T with an impedance ratio of 16, effectively
steps up the signal amplitude, thus further reducing the driving
requirements of the signal source.
The AD9203 can be easily configured for either a 1 V p-p or 2 V
p-p input span by setting the internal reference. Other input
spans can be realized with two external gain setting resistors as
demonstrate the SNR and SFDR performance over a wide range
of amplitudes required by most communication applications.
–30
–40
–50
–60
–70
–80
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
00573-030
COMMON-MODE VOLTAGE (V)
THD
(dB)
1.0V REF
0.5V REF
Figure 30. THD vs. Common-Mode Voltage vs. THD
(AIN = 2 V Differential) (fIN = 5 MHz, fS = 40 MSPS)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD9203ARUZ | 制造商:Analog Devices 功能描述:IC ADC 10BIT 40MSPS 28TSSOP |
| AD9203ARUZ | 制造商:Analog Devices 功能描述:IC, ADC, 10BIT, 40MSPS, TSSOP-28 |
| AD9203ARUZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:10-Bit, 40 MSPS, 3 V, 74 mW A/D Converter |
| AD9203ARUZRL7 | 功能描述:IC ADC 10BIT CMOS 40MSPS 28TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| AD9203ARUZRL71 | 制造商:AD 制造商全称:Analog Devices 功能描述:10-Bit, 40 MSPS, 3 V, 74 mW A/D Converter |
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