参数资料
型号: EVAL-AD7982SDZ
厂商: Analog Devices Inc
文件页数: 22/24页
文件大小: 0K
描述: BOARD EVAL FOR AD7982
标准包装: 1
系列: PulSAR®
ADC 的数量: 1
位数: 18
采样率(每秒): 1M
数据接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
输入范围: ±VREF
在以下条件下的电源(标准): 7mW @ 1MSPS
工作温度: -40°C ~ 85°C
已用 IC / 零件: AD7982
已供物品:
Data Sheet
AD7982
Rev. B | Page 7 of 24
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
REF
1
VDD
2
IN+
3
IN–
4
GND
5
VIO
10
SDI
9
SCK
8
SDO
7
CNV
6
AD7982
TOP VIEW
(Not to Scale)
06513-
004
Figure 4. 10-Lead MSOP Pin Configuration
06513-
005
1
REF
2
VDD
3
IN+
4
IN–
5
GND
10 VIO
NOTES
1. THE EXPOSED PAD SHOULD BE CONNECTED
TO GND. THIS CONNECTION IS NOT REQUIRED
TO MEET THE ELECTRICAL PERFORMANCES.
9
SDI
8
SCK
7
SDO
6
CNV
AD7982
TOP VIEW
Figure 5. 10-Lead QFN (LFCSP) Pin Configuration
Table 6. Pin Function Descriptions
Pin
No.
Mnemonic
Type1
Description
1
REF
AI
Reference Input Voltage. The REF range is 2.4 V to 5.1 V. This pin is referred to the GND pin and should
be decoupled closely to the GND pin with a 10 F capacitor.
2
VDD
P
Power Supply.
3
IN+
AI
Differential Positive Analog Input.
4
IN
AI
Differential Negative Analog Input.
5
GND
P
Power Supply Ground.
6
CNV
DI
Convert Input. This input has multiple functions. On its leading edge, it initiates the conversions and
selects the interface mode of the part: chain mode or CS mode. In CS mode, the SDO pin is enabled
when CNV is low. In chain mode, the data should be read when CNV is high.
7
SDO
DO
Serial Data Output. The conversion result is output on this pin. It is synchronized to SCK.
8
SCK
DI
Serial Data Clock Input. When the part is selected, the conversion result is shifted out by this clock.
9
SDI
DI
Serial Data Input. This input provides multiple features. It selects the interface mode of the ADC as follows:
Chain mode is selected if SDI is low during the CNV rising edge. In this mode, SDI is used as a data input to
daisy-chain the conversion results of two or more ADCs onto a single SDO line. The digital data level on SDI is
output on SDO with a delay of 18 SCK cycles.
CS mode is selected if SDI is high during the CNV rising edge. In this mode, either SDI or CNV can enable
the serial output signals when low. If SDI or CNV is low when the conversion is complete, the busy indicator
feature is enabled.
10
VIO
P
Input/Output Interface Digital Power. Nominally at the same supply as the host interface (1.8 V, 2.5 V, 3 V, or 5 V).
EPAD
Exposed Pad. For the lead frame chip scale package (LFCSP), the exposed pad should be connected to GND.
this connection is not required to meet the electrical performances.
1
AI = analog input, DI = digital input, DO = digital output, and P = power.
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