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鍙冩暩(sh霉)璩囨枡
| 鍨嬭櫉锛� | MAX5514ETC+T |
| 寤犲晢锛� | Maxim Integrated Products |
| 鏂囦欢闋佹暩(sh霉)锛� | 10/23闋� |
| 鏂囦欢澶у皬锛� | 0K |
| 鎻忚堪锛� | IC DAC 8BIT DUAL VOUT 12TQFN |
| 鐢�(ch菐n)鍝佸煿瑷�(x霉n)妯″锛� | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 妯欐簴鍖呰锛� | 2,500 |
| 瑷�(sh猫)缃檪闁擄細 | 660µs |
| 浣嶆暩(sh霉)锛� | 8 |
| 鏁�(sh霉)鎿�(j霉)鎺ュ彛锛� | MICROWIRE?锛孮SPI?锛屼覆琛�锛孲PI? |
| 杞�(zhu菐n)鎻涘櫒鏁�(sh霉)鐩細 | 2 |
| 闆诲闆绘簮锛� | 鍠浕婧� |
| 宸ヤ綔婧害锛� | -40°C ~ 85°C |
| 瀹夎椤炲瀷锛� | 琛ㄩ潰璨艰 |
| 灏佽/澶栨锛� | 12-WQFN 瑁搁湶鐒婄洡 |
| 渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁濓細 | 12-TQFN-EP锛�4x4锛� |
| 鍖呰锛� | 甯跺嵎 (TR) |
| 杓稿嚭鏁�(sh霉)鐩拰椤炲瀷锛� | 2 闆诲锛屽柈妤�锛�2 闆诲锛岄洐妤� |
| 閲囨ǎ鐜囷紙姣忕锛夛細 | * |
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MAX5512鈥揗AX5515
Voltage Biasing a
Current-Output Transducer
See the circuit in Figure 5 for an illustration of how to
configure the MAX5514/MAX5515 to bias a current-out-
put transducer. In Figure 5, the output voltage of the
MAX5514/MAX5515 is a function of the voltage drop
across the transducer added to the voltage drop
across the feedback resistor R.
Unipolar Output
Figure 6 shows the MAX5514 in a unipolar output con-
figuration with unity gain. Table 4 lists the unipolar out-
put codes.
Bipolar Output
The MAX5514 output can be configured for bipolar
operation as shown in Figure 7. The output voltage is
given by the following equation:
VOUT_ = VREFIN x [(NA - 128) / 128]
where NA represents the decimal value of the DAC鈥檚
binary input code. Table 5 shows the digital codes (off-
set binary) and the corresponding output voltage for
the circuit in Figure 7.
Configurable Output Gain
The MAX5514/MAX5515 have force-sense outputs,
which provide a connection directly to the inverting ter-
minal of the output op amp, yielding the most flexibility.
The advantage of the force-sense output is that specific
gains can be set externally for a given application. The
gain error for the MAX5514/MAX5515 is specified in a
unity-gain configuration (op-amp output and inverting
terminals connected), and additional gain error results
from external resistor tolerances. Another advantage of
the force-sense DAC is that it allows many useful circuits
to be created with only a few simple external components.
An example of a custom fixed gain using the MAX5514/
MAX5515 force-sense output is shown in Figure 9. In
this example, R1 and R2 set the gain for VOUTA.
VOUTA = [(VREFIN x NA) / 256] x [1 + (R2 / R1)]
where NA represents the numeric value of the DAC
input code.
Dual, Ultra-Low-Power,
8-Bit, Voltage-Output DACs
18
______________________________________________________________________________________
Table 4. Unipolar Code Table (Gain = +1)
DAC CONTENTS
MSB
LSB
ANALOG OUTPUT
1111
0000
+VREF (255/256)
1000
0001
0000
+VREF (129/256)
1000
0000
+VREF (128/256) = +VREF/2
0111
1111
0000
+VREF (127/256)
0000
0001
0000
+VREF (1/256)
0000
0V
Table 5. Bipolar Code Table (Gain = +1)
DAC CONTENTS
MSB
LSB
ANALOG OUTPUT
1111
0000
+VREF (127/128)
1000
0001
0000
+VREF (1/128)
1000
0000
0V
0111
1111
0000
-VREF (1/128)
0000
0001
0000
-VREF (127/128)
0000
-VREF (128/128) = -VREF
NA IS THE DAC_ INPUT CODE
(0 TO 255 DECIMAL).
REFIN
MAX5514
OUT_
FB_
VOUT =
VREFIN 脳 NA
256
DAC
Figure 6. Unipolar Output Circuit
REFIN
1/2 MAX5514
OUT_
VOUT
FB_
V+
10k
V-
DAC
Figure 7. Bipolar Output Circuit
鐩搁棞(gu膩n)PDF璩囨枡 |
PDF鎻忚堪 |
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| MAX5512EUA+T | IC DAC 8BIT DUAL VOUT 8-UMAX |
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鐩搁棞(gu膩n)浠ｇ悊鍟�/鎶€琛�(sh霉)鍙冩暩(sh霉) |
鍙冩暩(sh霉)鎻忚堪 |
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| MAX5515ETC | 鍔熻兘鎻忚堪:鏁�(sh霉)妯¤綁(zhu菐n)鎻涘櫒- DAC RoHS:鍚� 鍒堕€犲晢:Texas Instruments 杞�(zhu菐n)鎻涘櫒鏁�(sh霉)閲�:1 DAC 杓稿嚭绔暩(sh霉)閲�:1 杞�(zhu菐n)鎻涢€熺巼:2 MSPs 鍒嗚鲸鐜�:16 bit 鎺ュ彛椤炲瀷:QSPI, SPI, Serial (3-Wire, Microwire) 绌�(w臎n)瀹氭檪闁�:1 us 鏈€澶у伐浣滄韩搴�:+ 85 C 瀹夎棰�(f膿ng)鏍�:SMD/SMT 灏佽 / 绠遍珨:SOIC-14 灏佽:Tube |
| MAX5515ETC+ | 鍔熻兘鎻忚堪:鏁�(sh霉)妯¤綁(zhu菐n)鎻涘櫒- DAC 8-Bit 2Ch Precision DAC RoHS:鍚� 鍒堕€犲晢:Texas Instruments 杞�(zhu菐n)鎻涘櫒鏁�(sh霉)閲�:1 DAC 杓稿嚭绔暩(sh霉)閲�:1 杞�(zhu菐n)鎻涢€熺巼:2 MSPs 鍒嗚鲸鐜�:16 bit 鎺ュ彛椤炲瀷:QSPI, SPI, Serial (3-Wire, Microwire) 绌�(w臎n)瀹氭檪闁�:1 us 鏈€澶у伐浣滄韩搴�:+ 85 C 瀹夎棰�(f膿ng)鏍�:SMD/SMT 灏佽 / 绠遍珨:SOIC-14 灏佽:Tube |
| MAX5515ETC+T | 鍔熻兘鎻忚堪:鏁�(sh霉)妯¤綁(zhu菐n)鎻涘櫒- DAC 8-Bit 2Ch Precision DAC RoHS:鍚� 鍒堕€犲晢:Texas Instruments 杞�(zhu菐n)鎻涘櫒鏁�(sh霉)閲�:1 DAC 杓稿嚭绔暩(sh霉)閲�:1 杞�(zhu菐n)鎻涢€熺巼:2 MSPs 鍒嗚鲸鐜�:16 bit 鎺ュ彛椤炲瀷:QSPI, SPI, Serial (3-Wire, Microwire) 绌�(w臎n)瀹氭檪闁�:1 us 鏈€澶у伐浣滄韩搴�:+ 85 C 瀹夎棰�(f膿ng)鏍�:SMD/SMT 灏佽 / 绠遍珨:SOIC-14 灏佽:Tube |
| MAX5515ETC-T | 鍔熻兘鎻忚堪:鏁�(sh霉)妯¤綁(zhu菐n)鎻涘櫒- DAC RoHS:鍚� 鍒堕€犲晢:Texas Instruments 杞�(zhu菐n)鎻涘櫒鏁�(sh霉)閲�:1 DAC 杓稿嚭绔暩(sh霉)閲�:1 杞�(zhu菐n)鎻涢€熺巼:2 MSPs 鍒嗚鲸鐜�:16 bit 鎺ュ彛椤炲瀷:QSPI, SPI, Serial (3-Wire, Microwire) 绌�(w臎n)瀹氭檪闁�:1 us 鏈€澶у伐浣滄韩搴�:+ 85 C 瀹夎棰�(f膿ng)鏍�:SMD/SMT 灏佽 / 绠遍珨:SOIC-14 灏佽:Tube |
| MAX551ACPA | 鍔熻兘鎻忚堪:鏁�(sh霉)妯¤綁(zhu菐n)鎻涘櫒- DAC RoHS:鍚� 鍒堕€犲晢:Texas Instruments 杞�(zhu菐n)鎻涘櫒鏁�(sh霉)閲�:1 DAC 杓稿嚭绔暩(sh霉)閲�:1 杞�(zhu菐n)鎻涢€熺巼:2 MSPs 鍒嗚鲸鐜�:16 bit 鎺ュ彛椤炲瀷:QSPI, SPI, Serial (3-Wire, Microwire) 绌�(w臎n)瀹氭檪闁�:1 us 鏈€澶у伐浣滄韩搴�:+ 85 C 瀹夎棰�(f膿ng)鏍�:SMD/SMT 灏佽 / 绠遍珨:SOIC-14 灏佽:Tube |
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