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參數(shù)資料
| 型號(hào)： | SX8725E083TDT |
| 廠商： | Semtech |
| 文件頁數(shù)： | 9/53頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAS PRESS/TEMP SENS 12MLPD |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | ZoomingADC™ |
| 類型： | 數(shù)據(jù)采集系統(tǒng)（DAS） |
| 輸入類型： | 差分 |
| 輸出類型： | 數(shù)字 |
| 接口： | I²C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 12-WFDFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 12-MLPD |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁面： | 585 (CN2011-ZH PDF) |
| 其它名稱： | SX8725E083TDTDKR |
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ADVANCED COMMUNICATIONS & SENSING
V1.8 2009 Semtech Corp.
www.semtech.com
17
SX8725
ZoomingADC for Pressure and Temperature Sensing
Registers
The system has a bank of eight 8-bit registers: six registers are used to configure the acquisition chain
(RegAcCfg0 to 5), and two registers are used to store the output code of the analog-to-digital conversion
(RegAcOutMsb & Lsb).
Bit Position
Register Name
7
6
5
4
3
2
1
0
RegACOutLsb
OUT[7:0]
RegACOutMsb
OUT[15:8]
RegACCfg0
Default values:
START
0
SET_NELC[1:0]
01
SET_OSR[2:0]
010
CONT
0
-
0
RegACCfg1
Default values:
IB_AMP_ADC[1:0]
11
IB_AMP_PGA[1:0]
11
ENABLE[3:0]
0000
RegACCfg2
Default values:
FIN[1:0]
00
PGA2_GAIN[1:0]
00
PGA2_OFFSET[3:0]
0000
RegACCfg3
Default values:
PGA1_G
0
PGA3_GAIN[6:0]
0001100
RegACCfg4
Default values:
-
0
PGA3_OFFSET[6:0]
0000000
RegACCfg5
Default values:
BUSY
0
DEF
0
AMUX[4:0]
00000
VMUX
0
Table 1 - Peripheral Registers to Configure the Acquisition Chain (AC)
and to Store the Analog-to-Digital Conversion (ADC) Result
With:
OUT: (r) digital output code of the analog-to-digital converter. (MSB = OUT[15])
START: (w) setting this bit triggers a single conversion (after the current one is finished). This bit always reads back 0.
SET_NELC: (rw) sets the number of elementary conversions to 2 SET_NELC[1:0]. To compensate for offsets, the input signal is
chopped between elementary conversions (1,2,4,8).
SET_OSR: (rw) sets the over-sampling rate (OSR) of an elementary conversion to 2(3+SET_OSR[2:0]). OSR = 8, 16, 32, ..., 512,
1024.
CONT: (rw) setting this bit starts a conversion. A new conversion will automatically begin as long as the bit remains at 1.
TEST: bit only used for test purposes. In normal mode, this bit is forced to 0 and cannot be overwritten.
IB_AMP_ADC: (rw) sets the bias current in the ADC to 0.25*(1+ IB_AMP_ADC[1:0]) of the normal operation current (25, 50, 75 or
100% of nominal current). To be used for low-power, low-speed operation.
IB_AMP_PGA: (rw) sets the bias current in the PGAs to 0.25*(1+IB_AMP_PGA[1:0]) of the normal operation current (25, 50, 75 or
100% of nominal current). To be used for low-power, low-speed operation.
ENABLE: (rw) enables the ADC modulator (bit 0) and the different stages of the PGAs (PGAi by bit i=1,2,3). PGA stages that are
disabled are bypassed.
FIN: (rw) These bits set the over sampling frequency of the acquisition chain. Expressed as a fraction of the oscillator frequency,
the sampling frequency is given as: 11
500 kHz, 10
250 kHz, 01
125 kHz, 00
62.5 kHz.
PGA1_GAIN: (rw) sets the gain of the first stage: 0
1, 1
10.
PGA2_GAIN: (rw) sets the gain of the second stage: 00
1, 01
2, 10
5, 11
10.
PGA3_GAIN: (rw) sets the gain of the third stage to PGA3_GAIN[6:0]
1/12.
PGA2_OFFSET: (rw) sets the offset of the second stage between –1 and +1, with increments of 0.2. The MSB gives the sign
(0
→ positive, 1 → negative); amplitude is coded with the bits PGA2_OFFSET[5:0].
PGA3_OFFSET: (rw) sets the offset of the third stage between –5.25 and +5.25, with increments of 1/12. The MSB gives the sign
(0
→ positive, 1 → negative); amplitude is coded with the bits PGA3_OFFSET[5:0].
BUSY: (r) set to 1 if a conversion is running.
DEF: (w) sets all values to their defaults (PGA disabled, max speed, nominal modulator bias current, 2 elementary conversions,
over-sampling rate of 32) and starts a new conversion without waiting the end of the preceding one.
AMUX(4:0): (rw) AMUX(4) sets the mode (0
differential inputs, 1
single ended inputs with A0 = common reference) AMUX(3)
sets the sign (0
straight, 1
cross) AMUX(2:0) sets the channel.
VMUX: (rw) sets the differential reference channel (0
VBATT, 1
VREF).
(r = read; w = write; rw = read & write)
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| SX8725E083TRT | 功能描述:IC DAS PRESSURE/TEMP SENS 12MLPD RoHS:是 類別:集成電路 (IC) >> 接口 - 傳感器和探測(cè)器接口 系列:ZoomingADC™ 其它有關(guān)文件:Automotive Product Guide 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:74 系列:- 類型:觸控式傳感器 輸入類型:數(shù)字 輸出類型:數(shù)字 接口:JTAG，串行 電流 - 電源:100µA 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:管件 |
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| SX8733_11 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Precision Diode Digital Temperature For Up To 3 External Sensors |
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