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AD7262

更新时间: 2024-02-06 11:14:49
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
32页 785K
描述
1 MSPS, 12-Bit, Simultaneous Sampling SAR ADC with PGA and Four Comparators

AD7262 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Obsolete零件包装代码:QFP
包装说明:TFQFP, TQFP48,.35SQ针数:48
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.68
最大模拟输入电压:2.5 V最小模拟输入电压:
最长转换时间:0.56 µs转换器类型:ADC, SUCCESSIVE APPROXIMATION
JESD-30 代码:S-PQFP-G48JESD-609代码:e3
长度:7 mm最大线性误差 (EL):0.0244%
湿度敏感等级:1模拟输入通道数量:2
位数:12功能数量:2
端子数量:48最高工作温度:105 °C
最低工作温度:-40 °C输出位码:2'S COMPLEMENT BINARY
输出格式:SERIAL封装主体材料:PLASTIC/EPOXY
封装代码:TFQFP封装等效代码:TQFP48,.35SQ
封装形状:SQUARE封装形式:FLATPACK, THIN PROFILE, FINE PITCH
峰值回流温度(摄氏度):225电源:3/5,5 V
认证状态:Not Qualified采样速率:1 MHz
采样并保持/跟踪并保持:TRACK座面最大高度:1.2 mm
子类别:Analog to Digital Converters标称供电电压:5 V
表面贴装:YES温度等级:INDUSTRIAL
端子面层:MATTE TIN端子形式:GULL WING
端子节距:0.5 mm端子位置:QUAD
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:7 mm
Base Number Matches:1

AD7262 数据手册

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1 MSPS, 12-Bit, Simultaneous Sampling  
SAR ADC with PGA and Four Comparators  
AD7262  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
AV  
V
A
REF  
CC  
Dual simultaneous sampling 12-bit, 2-channel ADC  
True differential analog inputs  
Programmable gain stage: ×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16,  
×24, ×32, ×48, ×64, ×96, ×128  
REF  
AD7262  
BUF  
12-BIT  
SUCCESSIVE  
APPROXIMATION  
ADC  
V
+
A
OUTPUT  
DRIVERS  
D
A
PGA  
T/H  
OUT  
Throughput rate per ADC  
V
A
1 MSPS for AD7262  
500 kSPS for AD7262-5  
Analog input impedance: >1 GΩ  
Wide input bandwidth  
SCLK  
CAL  
CS  
REFSEL  
G0  
CONTROL  
LOGIC  
G1  
G2  
G3  
−3 dB bandwidth: 1.7 MHz at gain = 2  
4 on-chip comparators  
SNR: 73 dB typical at gain = 2, 66 dB typical at gain = 32  
Device offset calibration, system gain calibration  
On-chip reference: 2.5 V  
V
DRIVE  
12-BIT  
SUCCESSIVE  
APPROXIMATION  
ADC  
V
+
B
OUTPUT  
DRIVERS  
D
B
T/H  
PGA  
OUT  
V
B
PD0/D  
PD1  
PD2  
IN  
–40°C to +105°C operation  
High speed serial interface  
BUF  
V
B
REF  
SPI/QSPI™/MICROWIRE™/DSP compatible  
48-lead LFCSP and LQFP packages  
C
_C  
V
C
C
C
C
A
B
CC  
+
A
A
OUTPUT  
C
C
A
OUT  
DRIVERS  
COMP  
GENERAL DESCRIPTION  
+
B
OUTPUT  
DRIVERS  
B
OUT  
B
COMP  
The AD7262/AD7262-5 are dual, 12-bit, high speed, low power,  
successive approximation ADCs that operate from a single 5 V  
power supply. The AD7262 features throughput rates of up to  
1 MSPS per on-chip ADC. The AD7262-5 features throughput  
rates of up to 500 kSPS. Two complete ADC functions allow  
simultaneous sampling and conversion of two channels. Each  
ADC is preceded by a true differential analog input with a PGA.  
There are 14 gain settings available: ×1, ×2, ×3, ×4, ×6, ×8, ×12,  
×16, ×24, ×32, ×48, ×64, ×96, and ×128.  
C
C
_C _GND  
A
B
C
_C  
V
C
C
D
CC  
+
C
C
OUTPUT  
DRIVERS  
C
C
C
D
OUT  
C
C
C
COMP  
+
D
OUTPUT  
DRIVERS  
OUT  
D
COMP  
AGND  
_C _GND  
C
D
DGND  
Figure 1.  
The AD7262/AD7262-5 contain four comparators. Comparator A  
and Comparator B are optimized for low power, while Compara-  
tor C and Comparator D have fast propagation delays. The  
AD7262/AD7262-5 feature a calibration function to remove any  
device offset error and programmable gain adjust registers to  
allow for input path (for example, sensor) offset and gain  
compensation. The AD7262/AD7262-5 have an on-chip 2.5 V  
reference that can be disabled if an external reference is preferred.  
PRODUCT HIGHLIGHTS  
1. Integrated PGA with a variety of flexible gain settings to  
allow detection and conversion of low level analog signals.  
2. Each PGA is followed by a dual simultaneous sampling  
ADC, featuring throughput rates of 1 MSPS per ADC for  
the AD7262. The conversion results of both ADCs are  
simultaneously available on separate data lines or in succes-  
sion on one data line if only one serial port is available.  
3. Four integrated comparators that can be used to count  
signals from pole sensors in motor control applications.  
4. Internal 2.5 V reference.  
The AD7262/AD7262-5 are ideally suited for monitoring small  
amplitude signals from a variety of sensors. They include all the  
functionality needed for monitoring the position feedback  
signals from a variety of analog encoders used in motor control  
systems.  
Rev. 0  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rights of third parties that may result from its use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2008 Analog Devices, Inc. All rights reserved.  
 
 

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