STOP(1) START Opcode (1) S RTPin TA DIN t DR t SETTLE" />
參數(shù)資料
型號: ADS1191IPBSR
廠商: Texas Instruments
文件頁數(shù): 22/67頁
文件大小: 0K
描述: IC AFE 16BIT 8KSPS 1CH 32TQFP
標(biāo)準(zhǔn)包裝: 1,000
位數(shù): 16
通道數(shù): 1
電壓 - 電源,模擬: 2.7 V ~ 5.25 V
電壓 - 電源,數(shù)字: 1.7 V ~ 3.6 V
封裝/外殼: 32-TQFP
供應(yīng)商設(shè)備封裝: 32-TQFP(5x5)
包裝: 帶卷 (TR)
t
SDSU
t
DSHD
STOPOpcode
DRDY andDOUT
STARTPin
or
STOP(1)
START
Opcode
(1)
S
RTPin
TA
DIN
t
DR
t
SETTLE
DRDY
STOP
Opcode
(1)
or
SBAS566A – DECEMBER 2011 – REVISED SEPTEMBER 2012
Continuous Mode
Conversions begin when the START pin is taken high or when the START opcode command is sent. As seen in
Figure 33, the DRDY output goes high when conversions are started and goes low when data are ready.
Conversions continue indefinitely until the START pin is taken low or the STOP opcode command is transmitted.
When the START pin is pulled low or the stop command is issued, the conversion in progress is allowed to
complete. Figure 34 and Table 6 show the required timing of DRDY to the START pin and the START/STOP
opcode commands when controlling conversions in this mode. To keep the converter running continuously, the
START pin can be permanently tied high. Note that when switching from pulse mode to continuous mode, the
START signal is pulsed or a STOP command must be issued followed by a START command. This conversion
mode is ideal for applications that require a fixed continuous stream of conversions results.
(1)
START and STOP opcode commands take effect on the seventh SCLK falling edge at the end of the opcode
transmission.
Figure 33. Continuous Conversion Mode
(1)
START and STOP commands take effect on the seventh SCLK falling edge at the end of the opcode transmission.
Figure 34. START to DRDY Timing
Table 6. Timing Characteristics for Figure 34(1)
SYMBOL
DESCRIPTION
MIN
UNIT
START pin low or STOP opcode to DRDY setup time
tSDSU
8
tMOD
to halt further conversions
START pin low or STOP opcode to complete current
tDSHD
8
tMOD
conversion
(1)
START and STOP commands take effect on the seventh SCLK falling edge at the end of the opcode transmission.
Copyright 2011–2012, Texas Instruments Incorporated
29
Product Folder Links: ADS1191 ADS1192
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