参数资料
型号: AD9289BBC
厂商: Analog Devices Inc
文件页数: 10/32页
文件大小: 0K
描述: IC ADC 8BIT QUAD 65MSPS 64CSPBGA
标准包装: 1
位数: 8
采样率(每秒): 65M
数据接口: 串行
转换器数目: 4
功率耗散(最大): 625mW
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: 64-LFBGA,CSPBGA
供应商设备封装: 64-CSPBGA(8x8)
包装: 托盘
输入数目和类型: 8 个单端,单极;4 个差分,单极
AD9289
Rev. 0 | Page 18 of 32
10
F
0.1
F
VREF
SENSE
0.5V
CONTROL
REFT_A
0.1
F
0.1
F
10
F
0.1
F
REFB_A
SELECT
LOGIC
AVDD
A CORE
B CORE
+
VREF
VIN–C (–D)
SHARED_REF
VIN+C (+D)
REFT_B
0.1
F
0.1
F
10
F
REFB_B
C CORE
D CORE
+
03682-011
VIN–A (–B)
VIN+A (+B)
Figure 32. Shared Reference Mode Enabled
10
F
0.1
F
VREF
SENSE
0.5V
CONTROL
REFT_A
0.1
F
0.1
F
10
F
0.1
F
REFB_A
SELECT
LOGIC
A CORE
B CORE
+
VREF
SHARED_REF
REFT_B
0.1
F
0.1
F
10
F
REFB_B
C CORE
D CORE
+
03682-012
VIN–C (–D)
VIN+C (+D)
VIN–A (–B)
VIN+A (+B)
Figure 33. Internal Reference Configuration
10
F
0.1
F
VREF
SENSE
0.5V
R2
R1
CONTROL
REFT_A
0.1
F
0.1
F
10
F
0.1
F
REFB_A
SELECT
LOGIC
A CORE
B CORE
+
VREF
SHARED_REF
REFT_B
0.1
F
0.1
F
10
F
REFB_B
C CORE
D CORE
+
03682-013
VIN–C (–D)
VIN+C (+D)
VIN–A (–B)
VIN+A (+B)
Figure 34. Programmable Reference Configuration
If the internal reference of the AD9289 is used to drive multiple
converters to improve gain matching, the loading of the refer-
ence by the other converters must be considered. Figure 35
depicts how the internal reference voltage is affected by loading.
ILOAD (mA)
V
RE
F
E
RROR
(%)
0.05
0
–0.15
–0.10
–0.05
–0.20
–0.25
–0.30
–0.35
–0.40
0
1.0
0.5
2.0
1.5
2.5
03682-033
VREF = 0.5V
VREF = 1.0V
Figure 35. VREF Accuracy vs. Load
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