参数资料
型号: AD9238BST-20
厂商: Analog Devices Inc
文件页数: 44/48页
文件大小: 0K
描述: IC ADC 12BIT DUAL 20MSPS 64-LQFP
产品变化通告: AD9238 Lead Discontinuation 12/Sept/2011
标准包装: 1
位数: 12
采样率(每秒): 20M
数据接口: 并联
转换器数目: 2
功率耗散(最大): 180mW
电压电源: 单电源
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-LQFP
供应商设备封装: 64-LQFP(7x7)
包装: 托盘
输入数目和类型: 4 个单端,单极;2 个差分,单极
AD9238
Rev. C | Page 5 of 48
AC SPECIFICATIONS
AVDD = 3 V, DRVDD = 2.5 V, maximum sample rate, CLK_A = CLK_B; AIN = 0.5 dBFS differential input, 1.0 V internal reference,
TMIN to TMAX, DCS enabled, unless otherwise noted.
Table 2.
Test
AD9238BST/BCP-20
AD9238BST/BCP-40
AD9238BST/BCP-65
Parameter
Temp
Level
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Unit
SIGNAL-TO-NOISE RATIO (SNR)
fINPUT = 2.4 MHz
25°C
V
70.4
70.3
dB
fINPUT = 9.7 MHz
Full
V
70.2
dB
25°C
IV
69.7
70.4
dB
fINPUT = 19.6 MHz
Full
V
70.1
dB
25°C
IV
69.7
70.3
dB
fINPUT = 32.5 MHz
Full
V
69.3
dB
25°C
IV
68.7
70.0
dB
fINPUT = 100 MHz
25°C
V
68.7
68.3
67.6
dB
SIGNAL-TO-NOISE AND DISTORTION
RATIO (SINAD)
fINPUT = 2.4 MHz
25°C
V
70.2
70.1
dB
fINPUT = 9.7 MHz
Full
V
70.1
dB
25°C
IV
69.3
70.2
dB
fINPUT = 19.6 MHz
Full
V
69.9
dB
25°C
IV
69.4
70.1
dB
fINPUT = 32.5 MHz
Full
V
68.9
dB
25°C
IV
68.1
69.1
dB
fINPUT = 100 MHz
25°C
V
67.9
66.6
dB
EFFECTIVE NUMBER OF BITS (ENOB)
fINPUT = 2.4 MHz
25°C
V
11.5
11.4
Bits
fINPUT = 9.7 MHz
Full
V
11.4
Bits
25°C
IV
11.3
11.5
Bits
fINPUT = 19.6 MHz
Full
V
11.4
Bits
25°C
IV
11.3
11.4
Bits
fINPUT = 32.5 MHz
Full
V
11.2
Bits
25°C
IV
11.1
11.3
Bits
fINPUT = 100 MHz
25°C
V
11.1
10.9
Bits
WORST HARMONIC (SECOND or THIRD)
fINPUT = 9.7 MHz
Full
V
84.0
dBc
fINPUT = 19.6 MHz
Full
V
85.0
dBc
fINPUT = 35 MHz
Full
V
80.0
dBc
SPURIOUS-FREE DYNAMIC RANGE (SFDR)
fINPUT = 2.4 MHz
25°C
V
86.0
dBc
fINPUT = 9.7 MHz
Full
V
84.0
dBc
25°C
I
76.1
86.0
dBc
fINPUT = 19.6 MHz
Full
V
85.0
dBc
25°C
I
76.7
86.0
dBc
fINPUT = 32.5 MHz
Full
V
80.0
dBc
25°C
I
72.5
80.5
dBc
fINPUT = 100 MHz
25°C
V
75.0
dBc
CROSSTALK
Full
V
85.0
dB
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