參數(shù)資料
型號: AD7653ASTZRL
廠商: Analog Devices Inc
文件頁數(shù): 8/28頁
文件大?。?/td> 0K
描述: IC ADC 16BIT UNIPOLAR 48LQFP
標準包裝: 2,000
系列: PulSAR®
位數(shù): 16
采樣率(每秒): 1M
數(shù)據(jù)接口: 串行,并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 145mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 48-LQFP
供應(yīng)商設(shè)備封裝: 48-LQFP(7x7)
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 2 個偽差分,單極
配用: EVAL-AD7653CBZ-ND - BOARD EVALUATION FOR AD7653
AD7653
Transfer Functions
Using the OB/2C digital input, the AD7653 offers two output
codings: straight binary and twos complement. The LSB size is
VREF/65536, which is about 38.15 V. The AD7653’s ideal
transfer characteristic is shown in
and
Table 7. Output Codes and Ideal Input Voltages
Digital Output Code (Hex)
Description
Analog
Input
Straight
Binary
Twos
Complement
FSR – 1 LSB
2.499962 V
FFFF1
7FFF1
FSR – 2 LSB
2.499923 V
FFFE
7FFE
Midscale + 1 LSB
1.250038 V
8001
0001
Midscale
1.25 V
8000
0000
Midscale – 1 LSB
1.249962 V
7FFF
FFFF
–FSR + 1 LSB
38 V
0001
8001
–FSR
0 V
00002
80002
Figure 21. ADC Ideal Transfer Function
000...000
000...001
000...010
111...101
111...110
111...111
ADC
CODE
(S
tra
ight
Bina
ry
)
ANALOG INPUT
VREF – 1.5 LSB
VREF – 1 LSB
1LSB
0V
0.5 LSB
1 LSB = V REF/65536
02966-0-003
1This is also the code for overrange analog input (VIN – VINGND above
VREF – VREFGND).
2This is also the code for underrange analog input (VIN below VINGND).
NOTES
1THE CONFIGURATION SHOWN IS USING THE INTERNAL REFERENCE AND INTERNAL BUFFER.
2THE AD8021 IS RECOMMENDED. SEE DRIVER AMPLIFIER CHOICE SECTION.
3OPTIONAL LOW JITTER.
4A 10
F CERAMIC CAPACITOR (X5R, 1206 SIZE) IS RECOMMENDED (e.g., PANASONIC ECJ3YB0J106M).
SEE VOLTAGE REFERENCE INPUT SECTION.
AD7653
D3
CLOCK
C/P/DSP
SERIAL
PORT
DIGITAL SUPPLY
(3.3V OR 5V)
DVDD
100nF
+
10
F
100nF
+
10
F
20
100nF
+
10
F
ANALOG
SUPPLY
(5V)
2.7nF
CC
15
ANALOG INPUT
(0V TO 2.5V)
PD
RESET
IMPULSE
WARP
SER/PAR
OB/2C
BUSY
SDOUT
SCLK
INGND
IN
REFGND
REF
GND
AVDD
DGND
DVDD
OVDD
OGND
02966-A-004
U12
PDREF
PDBUF
RD
CS
BYTESWAP
CNVST
REFBUFIN1
100nF
CR4
Figure 22. Typical Connection Diagram
Rev. A | Page 16 of 28
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