參數(shù)資料
型號： TC7109ACKW
元件分類： ADC
英文描述： 1-CH 12-BIT DUAL-SLOPE ADC, PARALLEL ACCESS, PQFP44
封裝： PLASTIC, QFP-44
文件頁數(shù)： 3/30頁
文件大小： 479K
代理商： TC7109ACKW
2006 Microchip Technology Inc.
DS21456C-page 11
TC7109/A
FIGURE 3-3:
TC7109A RUN/HOLD Operation
3.2.4
DIRECT MODE
The data outputs (bits 1 through 8, low order bytes; bits
9 through 12, polarity and over range high order bytes)
are accessible under control of the byte and chip
enable terminals as inputs, with the MODE pin at a
LOW level. These three inputs are all active LOW.
Internal pull-up resistors are provided for an inactive
HIGH level when left open. When chip enable is LOW,
a byte enable input LOW will allow the outputs of the
byte to become active. A variety of parallel data
accessing techniques may be used, as shown in the
“Interfacing” section. (See Figure 3-4 and Table 3-1.)
The access of data should be synchronized with the
conversion cycle by monitoring the Status output. This
prevents accessing data while it is being updated and
eliminates the acquisition of erroneous data.
FIGURE 3-4:
TC7109A Direct Mode
Output Timing
TABLE 3-1:
TC7109A DIRECT MODE
TIMING REQUIREMENTS
3.2.5
HANDSHAKE MODE
An alternative means of interfacing the TC7109A to
digital systems is provided when the Handshake Out-
put mode of the TC7109A becomes active in controlling
the flow of data, instead of passively responding to chip
and byte enable inputs. This mode allows a direct inter-
face between the TC7109A and industry standard
UARTs with no external logic required. The TC7109A
provides all the control and flag signals necessary to
sequence the two bytes of data into the UART and ini-
tiate their transmission in serial form when triggered
into the Handshake mode. The cost of designing
remote data acquisition stations is reduced using serial
data transmission to minimize the number of lines to
the central controlling processor.
Integrator Output
Internal Clock
Determinated at
Zero Crossing
Detection
Auto-Zero Phase I
Min 1790 Counts
Max 2041 Counts
Static in
Hold State
INT
Phase II
RUN/HOLD input is ignored until end of auto-zero phase.
*Note:
*
Internal Latch
Status Output
RUN/HOLD Input
7 Counts
= High-Impedance
CE/LOAD
As Input
tCEA
tBEA
HBEN
As Input
tDAB
LBEN
As Input
High Byte
Data
Low Byte
Data
Valid
tDAC
tDHC
Data
Valid
Data
Valid
Symbol
Description
Min
Typ
Max
Units
tBEA
Byte Enable Width
200
500
—
nsec
tDAB
Data Access Time
from Byte Enable
—
150
300
nsec
tDHB
Data Hold Time
from Byte Enable
—
150
300
nsec
tCEA
Chip Enable Width
300
500
nsec
tDAC
Data Access Time
from Chip Enable
—
200
400
nsec
tDHC
Data Hold Time
from Chip Enable
—
200
400
nsec
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TC7109ACKW713 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 13 Bit Fast Recovery 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 輸入類型:Differential 信噪比:107 dB 接口類型: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
TC7109ACLW 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 13 Bit Fast Recovery 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 輸入類型:Differential 信噪比:107 dB 接口類型: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
TC7109ACLW713 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 13 Bit Fast Recovery 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 輸入類型:Differential 信噪比:107 dB 接口類型: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
TC7109ACPL 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 13 Bit Fast Recovery 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 輸入類型:Differential 信噪比:107 dB 接口類型: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
TC7109AIJL 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 13 Bit Fast Recovery 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 輸入類型:Differential 信噪比:107 dB 接口類型: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
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