參數(shù)資料
型號(hào)： MAX1048BETX+
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 17/39頁(yè)
文件大?。?/td> 0K
描述： IC ADC/DAC 10BIT 36-TQFN-EP
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）： 10 b
采樣率（每秒）： 225k
數(shù)據(jù)接口： 串行
電壓電源： 模擬和數(shù)字
電源電壓： 4.75 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
MAX1040/MAX1042/MAX1046/MAX1048
10-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
24
______________________________________________________________________________________
Unipolar/Bipolar Registers
The final 2 bits (LSBs) of the setup register control the
unipolar-/bipolar-mode address registers. Set
DIFFSEL[1:0] = 10 to write to the unipolar-mode regis-
ter. Set bits DIFFSEL[1:0] = 11 to write to the bipolar-
mode register. In both cases, the setup command byte
must be followed by 1 byte of data that is written to the
unipolar-mode register or bipolar-mode register. Hold
CS low and run 16 SCLK cycles before pulling CS high.
If the last 2 bits of the setup register are 00 or 01, nei-
ther the unipolar-mode register nor the bipolar-mode
register is written. Any subsequent byte is recognized
as a new command byte. See Tables 6, 7, and 8 to pro-
gram the unipolar- and bipolar-mode registers.
Both registers power up at all zeros to set the inputs as
eight unipolar single-ended channels. To configure a
channel pair as single-ended unipolar, bipolar differen-
tial, or unipolar differential, see Table 8.
In unipolar mode, AIN+ can exceed AIN- by up to
VREF. The output format in unipolar mode is binary. In
bipolar mode, either input can exceed the other by up
to VREF / 2. The output format in bipolar mode is two’s
complement (see the
ADC Transfer Functions section).
ADC Averaging Register
Write a command byte to the ADC averaging register to
configure the ADC to average up to 32 samples for
each requested result, and to independently control the
number of results requested for single-channel scans.
Table 8. Unipolar/Bipolar Channel Function
UNIPOLAR-
MODE
REGISTER BIT
BIPOLAR-MODE
REGISTER BIT
CHANNEL PAIR
FUNCTION
0
Unipolar single ended
0
1
Bipolar differential
1
0
Unipolar differential
1
Unipolar differential
Table 9. ADC Averaging Register*
BIT NAME
BIT
FUNCTION
—
7 (MSB)
Set to zero to select ADC averaging register.
—
6
Set to zero to select ADC averaging register.
—
5
Set to one to select ADC averaging register.
AVGON
4
Set to one to turn averaging on. Set to zero to turn averaging off.
NAVG1
3
Configures the number of conversions for single-channel scans.
NAVG0
2
Configures the number of conversions for single-channel scans.
NSCAN1
1
Single-channel scan count. (Scan mode 10 only.)
NSCAN0
0 (LSB)
Single-channel scan count. (Scan mode 10 only.)
AVGON
NAVG1
NAVG0
FUNCTION
0
X
Performs one conversion for each requested result.
1
0
Performs four conversions and returns the average for each requested result.
1
0
1
Performs eight conversions and returns the average for each requested result.
1
0
Performs 16 conversions and returns the average for each requested result.
1
Performs 32 conversions and returns the average for each requested result.
NSCAN1
NSCAN0
FUNCTION (APPLIES ONLY IF SCAN MODE 10 IS SELECTED)
0
Scans channel N and returns four results.
0
1
Scans channel N and returns eight results.
1
0
Scans channel N and returns 12 results.
1
Scans channel N and returns 16 results.
*
See below for bit details.
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