- 您现在的位置：买卖IC网 > PDF目录373958 > AD9058 (Analog Devices, Inc.) Dual 8-Bit 50 MSPS A/D Converter PDF资料下载
参数资料
| 型号： | AD9058 |
| 厂商： | Analog Devices, Inc. |
| 元件分类： | ADC |
| 英文描述： | Dual 8-Bit 50 MSPS A/D Converter |
| 中文描述： | 双8位50 MSPS的A/D转换 |
| 文件页数： | 7/8页 |
| 文件大小： | 148K |
| 代理商： | AD9058 |
REV. B
AD9058
–7–
t
V
t
PD
N
t
A
N + 1
ANALOG INPUT
ENCODE
D
–
D
0
7
DATA
CHANGING
VALID DATA
FOR N
–
1
VALID DATA
FOR N
VALID DATA
FOR N + 1
N + 2
t
V
= DATA DELAY OF
PRECEDING ENCODE
t
PD
= OUTPUT PROPAGATION DELAY
= APERTURE TIME
t
A
Figure 4. AD9058 Timing Diagram
Figure 5 below shows what the analog input to the AD9058 would
look like when observed relative to the sample clock. Signal-
to-noise ratio (SNR), transient response, and sample rate are all
critical specifications in digitizing this “eye pattern.”
ANALOG
INPUT
SAMPLE
CLOCK
Figure 5. AD9058 I and Q Input Signals
Receiver sensitivity is limited by the SNR of the system. For the
ADC, SNR is measured in the frequency domain and calculated
with a Fast Fourier Transform (FFT). The
signal-to-noise ratio
equals the ratio of the fundamental component of the signal
(rms amplitude) to the rms level of the noise. Noise is the sum
of all other spectral components, including harmonic distortion,
but excluding dc.
Although the signal being sampled does not have a significant
slew rate at the instant it is encoded, dynamic performance of
the ADC and the system is still critical.
Transient response is
the
time required for the AD9058 to achieve full accuracy when a
step function input is applied.
Overvoltage recovery time is
the in-
terval required for the AD9058 to recover to full accuracy after
an overdriven analog input signal is reduced to its input range.
Time domain performance of the ADC is also extremely impor-
tant in digital oscilloscopes. When a track (sample)-and-hold is
used ahead of the ADC, its operation becomes similar to that
described above for receivers.
The dynamic response to high-frequency inputs can be described
by the
effective number of bits
(ENOB). The
effective number of bits
is calculated with a sine wave curve fit and is expressed as:
ENOB = N – LOG
2
[Error (measured)/Error (ideal)]
where
N
is the resolution (number of bits) and measured error
is actual rms error calculated from the converter’s outputs with
a pure sine wave applied as the input.
Maximum conversion rate
is defined as the encode (sample) rate
at which SNR of the lowest frequency analog test signal drops
no more than 3 dB below the guaranteed limit.
H
–
60
55
50
45
40
35
INPUT FREQUENCY
–
MHz
0.1
1
10
100
30
+25
°
C
–
55
°
C
+125
°
C
Figure 6. Harmonic Distortion vs. Analog Input Frequency
0.1
1
10
100
INPUT FREQUENCY
–
MHz
8.0
7.2
6.4
5.5
E
55
50
AAAAAAA
45
40
35
30
S
–
AAA
AA
AA
AA
+25
°
C AND +125
°
C
–
55
°
C
Figure 7. AD9058 Dynamic Performance vs. Analog Input
Frequency
相关PDF资料 |
PDF描述 |
|---|---|
| AD9058KD | Dual 8-Bit 50 MSPS A/D Converter |
| AD9059PCB | Dual 8-Bit, 60 MSPS A/D Converter |
| AD9059 | Dual 8-Bit, 60 MSPS A/D Converter |
| AD9059BRS | Dual 8-Bit, 60 MSPS A/D Converter |
| AD9060KZ | 10-Bit 75 MSPS A/D Converter |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD9058-803D | 制造商:Analog Devices 功能描述:- Rail/Tube |
| AD9058AJD | 功能描述:IC ADC 8BIT DUAL 50MSPS 48-CDIP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| AD9058AJJ | 功能描述:IC ADC 8BIT DUAL 50MSPS 44-JLCC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| AD9058AJJ-REEL | 制造商:AD 制造商全称:Analog Devices 功能描述:Dual 8-Bit 50 MSPS A/D Converter |
| AD9058AKD | 功能描述:IC ADC 8BIT DUAL 50MSPS 48-CDIP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:250 系列:- 位数:12 采样率（每秒）:1.8M 数据接口:并联 转换器数目:1 功率耗散（最大）:1.82W 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:48-LQFP 供应商设备封装:48-LQFP（7x7） 包装:管件 输入数目和类型:2 个单端，单极 |
发布紧急采购，3分钟左右您将得到回复。