参数资料
型号: AD9231BCPZRL7-40
厂商: Analog Devices Inc
文件页数: 15/36页
文件大小: 0K
描述: IC ADC 12BIT 40MSPS 64LFCSP
标准包装: 750
位数: 12
采样率(每秒): 40M
数据接口: 串行,SPI?
转换器数目: 2
功率耗散(最大): 103mW
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-VFQFN 裸露焊盘,CSP
供应商设备封装: 64-LFCSP-VQ(9x9)
包装: 带卷 (TR)
输入数目和类型: 4 个单端,单极;2 个差分,单极
AD9231
Rev. A | Page 22 of 36
VOLTAGE REFERENCE
A stable and accurate 1.0 V voltage reference is built into the
AD9231. The VREF can be configured using either the internal
1.0 V reference or an externally applied 1.0 V reference voltage.
The various reference modes are summarized in the sections
that follow. The Reference Decoupling section describes the
best practices PCB layout of the reference.
Internal Reference Connection
A comparator within the AD9231 detects the potential at the
SENSE pin and configures the reference into two possible modes,
which are summarized in Table 10. If SENSE is grounded, the
reference amplifier switch is connected to the internal resistor
divider (see Figure 46), setting VREF to 1.0 V.
VREF
SENSE
0.5V
ADC
SELECT
LOGIC
0.1F
1.0F
VIN–A/VIN–B
VIN+A/VIN+B
ADC
CORE
08
12
1-
0
12
Figure 46. Internal Reference Configuration
If the internal reference of the AD9231 is used to drive multiple
converters to improve gain matching, the loading of the reference
by the other converters must be considered. Figure 47 shows
how the internal reference voltage is affected by loading.
0
–3.0
02
LOAD CURRENT (mA)
RE
F
E
RE
NCE
V
O
L
T
AG
E
RR
O
R
(
%
)
.0
–0.5
–1.0
–1.5
–2.0
–2.5
0.2
0.4
0.6
0.8
1.0
1.4
1.6
1.8
1.2
INTERNAL VREF = 0.993V
08
12
1-
0
14
Figure 47. VREF Accuracy vs. Load Current
Table 10. Reference Configuration Summary
Selected Mode
SENSE Voltage (V)
Resulting VREF (V)
Resulting Differential Span (V p-p)
Fixed Internal Reference
AGND to 0.2
1.0 internal
2.0
Fixed External Reference
AVDD
1.0 applied to external VREF pin
2.0
相关PDF资料
PDF描述
CS6422-CS IC CODEC SPKRPHONE 2CH 20-SOIC
AD9649BCPZRL7-20 IC ADC 14BIT 20MSPS 32LFCSP
CXS3102A2027P CONN RCPT 14POS PNL MNT PIN
SP3239ECA-L/TR IC TXRX RS232 INTELLIGENT 28SSOP
MS27467T11F98PD CONN PLUG 6POS STRAIGHT W/PINS
相关代理商/技术参数
参数描述
AD9231BCPZRL7-65 功能描述:IC ADC 12BIT 65MSPS 64LFCSP 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 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
AD9231BCPZRL7-80 功能描述:IC ADC 12BIT 80MSPS 64LFCSP 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 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
AD9233 制造商:AD 制造商全称:Analog Devices 功能描述:12-Bit, 80 MSPS/105 MSPS/125 MSPS, 1.8 V Analog-to-Digital Converter
AD9233-105EB 制造商:AD 制造商全称:Analog Devices 功能描述:12-Bit, 80 MSPS/105 MSPS/125 MSPS, 1.8 V Analog-to-Digital Converter
AD9233-105EBZ 制造商:Analog Devices 功能描述: