參數(shù)資料
型號: MAX1320ECM+
廠商: Maxim Integrated Products
文件頁數(shù): 14/27頁
文件大?。?/td> 0K
描述: IC ADC 14BIT 8CH 2MSPS 48LQFP
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 250
位數(shù): 14
采樣率(每秒): 2M
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 1.82W
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 48-LQFP
供應(yīng)商設(shè)備封裝: 48-LQFP(7x7)
包裝: 管件
輸入數(shù)目和類型: 8 個(gè)單端,雙極
MAX1316–MAX1318/MAX1320–MAX1322/MAX1324–MAX1326
8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs
with ±10V, ±5V, and 0 to +5V Analog Input Ranges
______________________________________________________________________________________
21
The input range is centered about VMSV. Normally,
MSV = AGND, and the input is symmetrical about zero.
For a custom midscale voltage, drive MSV with an
external voltage source. Noise present on MSV directly
couples into the ADC result. Use a precision, low-drift
voltage reference with adequate bypassing to prevent
MSV from degrading ADC performance. For maximum
FSR, be careful not to violate the absolute maximum
voltage ratings of the analog inputs when choosing
VMSV. Determine the input voltage as a function of
VREF, VMSV, and the output code in decimal using the
following equation:
Unipolar 0 to +5V Devices
Table 7 and Figure 11 show the offset binary transfer
function for the MAX1316/MAX1317/MAX1318 with a 0
to +5V input range. The FSR is two times the voltage at
REF. The internal +2.500V reference gives a +5V FSR,
while an external +2V to +3V reference allows an FSR
of +4V to +6V, respectively. Calculate the LSB size
using the following equation:
This equals 0.3052mV when using the internal reference.
LSB
VREF
=
×
2
14
V
LSB
CODE
V
CH
MSV
_
+
10
Figure 10. ±5V Bipolar Transfer Function
4 x VREF
2
1 LSB =
TWO'S
COMPLEMENT
BINAR
Y
OUTPUT
CODE
-8192 -8190
+8191
+8189
0x2000
0x2001
0x2002
0x2003
0x1FFF
0x1FFE
0x1FFD
0x1FFC
0x3FFF
0x0000
0x0001
-1 0 +1
(MSV)
INPUT VOLTAGE (VCH_ - VMSV IN LSBs)
Table 6. ±5V Bipolar Code Table
TWO’S COMPLEMENT
BINARY OUTPUT CODE
DECIMAL
EQUIVALENT
OUTPUT
(CODE10)
INPUT
VOLTAGE (V)
(VREF = 2.5V,
VMSV = 0V)
01 1111 1111 1111
0x1FFF
8191
4.9997
±0.5 LSB
01 1111 1111 1110
0x1FFE
8190
4.9991
±0.5 LSB
00 0000 0000 0001
0x0001
1
0.0009
±0.5 LSB
00 0000 0000 0000
0x0000
0
0.0003
±0.5 LSB
11 1111 1111 1111
0x3FFF
-1
-0.0003
±0.5 LSB
10 0000 0000 0001
0x2001
-8191
-4.9991
±0.5 LSB
10 0000 0000 0000
0x2000
-8192
-4.9997
±0.5 LSB
Table 7. 0 to +5V Unipolar Code Table
BINARY OUTPUT CODE
DECIMAL
EQUIVALENT
OUTPUT
(CODE10)
INPUT
VOLTAGE (V)
(VREF = VREFMS
= 2.5V)
11 1111 1111 1111
0x3FFF
16383
4.9998
±0.5 LSB
11 1111 1111 1110
0x3FFE
16382
4.9995
±0.5 LSB
10 0000 0000 0001
0x2001
8193
2.5005
±0.5 LSB
10 0000 0000 0000
0x2000
8192
2.5002
±0.5 LSB
01 1111 1111 1111
0x1FFF
8191
2.4998
±0.5 LSB
00 0000 0000 0001
0x0001
1
0.0005
±0.5 LSB
00 0000 0000 0000
0x0000
0
0.0002
±0.5 LSB
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