參數(shù)資料
型號: MAX1258BETM+T
廠商: Maxim Integrated Products
文件頁數(shù): 19/43頁
文件大小: 0K
描述: IC ADC/DAC 12BIT 48-TQFN
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 2,500
類型: ADC,DAC
分辨率(位): 12 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: 48-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 48-TQFN-EP(7x7)
包裝: 帶卷 (TR)
MAX1220/MAX1257/MAX1258
12-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
26
______________________________________________________________________________________
Table 5c. Clock Mode 11
REFSEL1
REFSEL0
VOLTAGE
REFERENCE
OVERRIDE
CONDITIONS
AUTOSHUTDOWN
REF2
CONFIGURATION
AIN
Internal reference turns off after scan is complete. If
internal reference is turned off, there is a programmed
delay of 218 external conversion clock cycles.
00
Internal (DAC
and ADC)
Temperature
Internal reference required. There is a programmed
delay of 244 external conversion clock cycles for the
internal reference. Temperature-sensor output appears
at DOUT after 188 further external clock cycles.
AIN14/AIN6
AIN
Internal reference not used.
01
External single-
ended (REF1
for DAC and
REF2 for ADC)
Temperature
Internal reference required. There is a programmed
delay of 244 external conversion clock cycles for the
internal reference. Temperature-sensor output appears
at DOUT after 188 further external clock cycles.
REF2
AIN
Default reference mode. Internal reference turns off
after scan is complete. If internal reference is turned
off, there is a programmed delay of 218 external
conversion clock cycles.
10
Internal (ADC)
and external
REF1 (DAC)
Temperature
Internal reference required. There is a programmed
delay of 244 external conversion clock cycles for the
internal reference. Temperature-sensor output appears
at DOUT after 188 further external clock cycles.
AIN14/AIN6
AIN
Internal reference not used.
11
External
differential
(ADC), external
REF1 (DAC)
Temperature
Internal reference required. There is a programmed
delay of 244 external conversion clock cycles for the
internal reference. Temperature-sensor output appears
at DOUT after 188 further external clock cycles.
REF2
Table 5d. Differential Select Modes
DIFFSEL1 DIFFSEL0
FUNCTION
0
No data follows the command setup byte. Unipolar-mode and bipolar-mode registers remain unchanged.
0
1
No data follows the command setup byte. Unipolar-mode and bipolar-mode registers remain unchanged.
1
0
1 byte of data follows the command setup byte and is written to the unipolar-mode register.
1
1 byte of data follows the command setup byte and is written to the bipolar-mode register.
The ADC reference is always on if any of the following
conditions are true:
1) The FBGON bit is set to one in the reset register.
2) At least one DAC output is powered up and
REFSEL[1:0] (in the setup register) = 00.
3) At least one DAC is powered down through the
100k
to VREF and REFSEL[1:0] = 00.
If any of the above conditions exist, the ADC reference
is always on, but there is a 188 clock-cycle delay
before temperature-sensor measurements begin, if
requested.
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