- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9499 > MAX1221BETX+ (Maxim Integrated Products)IC ADC/DAC 12BIT W/FIFO 36TQFNEP PDF資料下載
參數(shù)資料
| 型號(hào)： | MAX1221BETX+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 27/44頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC/DAC 12BIT W/FIFO 36TQFNEP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 類型： | ADC，DAC |
| 分辨率（位）： | 12 b |
| 采樣率（每秒）： | 225k |
| 數(shù)據(jù)接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 電壓電源： | 模擬和數(shù)字 |
| 電源電壓： | 2.7 V ~ 5.25 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 36-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 36-TQFN 裸露焊盤（6x6） |
| 包裝： | 管件 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁當(dāng)前第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁
MAX1221/MAX1223/MAX1343
12-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
______________________________________________________________________________________
33
and forces them to a high-impedance state. DAC out-
puts 0 and 1 remain in their previous state.
Output-Data Format
Figures 6–9 illustrate the conversion timing for the
MAX1221/MAX1223/MAX1343. All 12-bit conversion
results are output in 2-byte format, MSB first, with four
leading zeros. Data appears on DOUT on the falling
edges of SCLK. Data is binary for unipolar mode and
two’s complement for bipolar mode and temperature
results. See Figures 3, 4, and 5 for input/output and
temperature-transfer functions.
ADC Transfer Functions
Figure 3 shows the unipolar transfer function for single-
ended or differential inputs. Figure 4 shows the bipolar
transfer function for differential inputs. Code transitions
occur halfway between successive-integer LSB values.
Output coding is binary, with 1 LSB = VREF1 / 4096 for
unipolar and bipolar operation, and 1 LSB = +0.125°C
for temperature measurements. Bipolar true-differential
results and temperature-sensor results are available in
two’s complement format, while all others are in binary.
See Tables 6, 7, and 8 for details on which setting
(unipolar or bipolar) takes precedence.
In unipolar mode, AIN+ can exceed AIN- by up to
VREF1. In bipolar mode, either input can exceed the
other by up to VREF1 / 2.
Partial Reads and Partial Writes
If the first byte of an entry in the FIFO is partially read
(
CS is pulled high after fewer than eight SCLK cycles),
the remaining bits are lost for that byte. The next byte of
data that is read out contains the next 8 bits. If the first
byte of an entry in the FIFO is read out fully, but the
second byte is read out partially, the rest of that byte is
lost. The remaining data in the FIFO is unaffected and
can be read out normally after taking
CS low again, as
long as the 4 leading bits (normally zeros) are ignored.
If
CS is pulled low before EOC goes low, a conversion
may not be completed and the FIFO data may not be
correct. Incorrect writes (pulling
CS high before com-
pleting eight SCLK cycles) are ignored and the register
remains unchanged.
FULL-SCALE
TRANSITION
111....111
0
INPUT VOLTAGE (LSB)
FS = VREF
111....110
111....101
OFFSET
BINAR
Y
OUTPUT
CODE
(LSB)
000....011
000....010
000....001
000....000
2
13
FS
1 LSB = VREF / 4096
FS - 3/2 LSB
Figure 3. Unipolar Transfer Function—Full Scale (FS) = VREF
OUTPUT CODE
011....111
TEMPERATURE (
°C)
011....110
000....001
111....101
100....001
100....000
111....111
111....110
000....000
0
000....010
-256
+255.5
Figure 5. Temperature Transfer Function
011....111
-FS
INPUT VOLTAGE (LSB)
FS = VREF / 2 + VCOM
VREF = VREF+ - VREF-
-FS = -VREF / 2
011....110
011....101
000....001
000....000
111....111
OFFSET
BINAR
Y
OUTPUT
CODE
(LSB)
100....011
100....010
100....001
100....000
0
(COM)
-1
+1
+FS - 1 LSB
1 LSB = VREF / 4096
ZS = COM
VREF
(COM)
VREF
Figure 4. Bipolar Transfer Function—Full Scale (±FS) = ±VREF / 2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX188DCWP+ | IC DAS 8CH 12BIT T/H LP 20-SOIC |
| MAX1407CAI+ | IC DAS 16BIT LP 28-SSOP |
| MAX1414CAI+ | IC DAS 16BIT LP 28-SSOP |
| NBXDPA019LN1TAG | IC CLK XO LVDS 125/250MHZ 6CLCC |
| MAX181CCQH+D | IC DAS 12BIT 100KSPS 44-PLCC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1221BETX+ | 功能描述:ADC / DAC多通道 12-Bit 8Ch 300ksps 5.25V Precision ADC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX1221BETX+T | 功能描述:ADC / DAC多通道 12-Bit 8Ch 300ksps 5.25V Precision ADC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX1221BETX-T | 功能描述:ADC / DAC多通道 RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX1223BETX | 制造商:Maxim Integrated Products 功能描述:12-BIT MULTICHANNEL ADC/DAC WITH F - Rail/Tube |
| MAX1223BETX+ | 制造商:Maxim Integrated Products 功能描述:12-BIT, MULTICHANNEL ADCS/DACS WITH FIFO, TEMPERATURE SENSIN - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC ADC 12BIT QFN 制造商:Maxim Integrated Products 功能描述:ADC / DAC Multichannel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。