參數(shù)資料
型號(hào)： ADS7825UB/1K
廠商： Texas Instruments
文件頁(yè)數(shù)： 19/21頁(yè)
文件大?。?/td> 0K
描述： IC 16-BIT 4-CHAN MUX A/D 28-SOIC
產(chǎn)品培訓(xùn)模塊： Data Converter Basics
標(biāo)準(zhǔn)包裝： 1,000
位數(shù)： 16
采樣率（每秒）： 40k
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）： 50mW
電壓電源： 單電源
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 28-SOIC（0.295"，7.50mm 寬）
供應(yīng)商設(shè)備封裝： 28-SOIC
包裝： 帶卷 (TR)
輸入數(shù)目和類(lèi)型： 4 個(gè)單端，雙極
7
ADS7825
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
ADS7825
Serial Output
±10V
+5V
0.1F 10F
+
NOTES: (1) DATACLK (pin 15) is an output when EXT/INT (pin 12) is LOW
and an input when EXT/INT is HIGH. (2) NC = no connection. (3) PAR/SER = 0V.
2.2F
+
2.2F
+
Convert Pulse
BUSY
SDATA
DATACLK(1)
EXT/INT
SYNC
R/C
40ns min
NC(2)
(3)
BASIC OPERATION
PARALLEL OUTPUT
Figure 1a shows a basic circuit to operate the ADS7825 with
parallel output (Channel 0 selected). Taking R/C (pin 22)
LOW for 40ns (12
s max) will initiate a conversion. BUSY
(pin 24) will go LOW and stay LOW until the conversion is
completed and the output register is updated. If BYTE (pin
21) is LOW, the 8 most significant bits will be valid when
pin 24 rises; if BYTE is HIGH, the 8 least significant bits
will be valid when BUSY rises. Data will be output in
Binary Two’s Complement format. BUSY going HIGH can
be used to latch the data. After the first byte has been read,
BYTE can be toggled allowing the remaining byte to be
read. All convert commands will be ignored while BUSY is
LOW.
The ADS7825 will begin tracking the input signal at the end
of the conversion. Allowing 25
s between convert com-
mands assures accurate acquisition of a new signal.
SERIAL OUTPUT
Figure 1b shows a basic circuit to operate the ADS7825 with
serial output (Channel 0 selected). Taking R/C (pin 22)
LOW for 40ns (12
s max) will initiate a conversion and
output valid data from the previous conversion on SDATA
(pin 16) synchronized to 16 clock pulses output on
DATACLK (pin 15). BUSY (pin 24) will go LOW and stay
LOW until the conversion is completed and the serial data
has been transmitted. Data will be output in Binary Two’s
Complement format, MSB first, and will be valid on both the
rising and falling edges of the data clock. BUSY going
HIGH can be used to latch the data. All convert commands
will be ignored while BUSY is LOW.
The ADS7825 will begin tracking the input signal at the end
of the conversion. Allowing 25
s between convert com-
mands assures accurate acquisition of a new signal.
(a)
FIGURE 1. Basic Connection Diagram, (a) Parallel Output, (b) Serial Output.
(b)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
ADS7825
Parallel Output
±10V
+5V
+5V(1)
0.1F 10F
+
D10
D9
D8
D2
D1
D0
D13 D12
D15
Pin 21
LOW
D14
D11
D5
D4
D7
Pin 21
HIGH
NOTE: (1) PAR/SER = 5V
D6
D3
2.2F
+
2.2F
+
Convert Pulse
BUSY
R/C
BYTE
40ns min
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參數(shù)描述
ADS7825UBE4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 4 Channel 16-Bit Sampling CMOS RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS7825UBG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 4 Channel 16-Bit Sampling CMOS RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS7825UE4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 4 Channel 16-Bit Sampling CMOS RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS7825UG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 4 Channel 16-Bit Sampling CMOS RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS7826 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:10/8/12-BIT HIGH SPEED 2.7 V microPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER
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