参数资料
型号: LM4040C82ILPR
厂商: Texas Instruments
文件页数: 27/58页
文件大小: 0K
描述: IC VREF SHUNT PREC 8.192V TO92-3
标准包装: 1
基准类型: 旁路,精度
输出电压: 8.192V
容差: ±0.5%
温度系数: 100ppm/°C
通道数: 1
电流 - 阴极: 110µA
电流 - 输出: 15mA
工作温度: -40°C ~ 85°C
安装类型: 通孔
封装/外壳: TO-226-3、TO-92-3(TO-226AA)成形引线
供应商设备封装: TO-92-3
包装: 剪切带 (CT)
其它名称: 296-22167-1

LM4040
www.ti.com .................................................................................................................................................. SLOS456K – JANUARY 2005 – REVISED MARCH 2008
APPLICATION INFORMATION
Start-Up Characteristics
R S
V IN
LM4040
V Z
1-Hz Rate
Figure 7. Test Circuit
Output Capacitor
The LM4040 does not require an output capacitor across cathode and anode for stability. However, if an output
bypass capacitor is desired, the LM4040 is designed to be stable with all capacitive loads.
SOT-23 Connections
There is a parasitic Schottky diode connected between pins 2 and 3 of the SOT-23 packaged device. Thus, pin 3
of the SOT-23 package must be left floating or connected to pin 2.
Use With ADCs or DACs
The LM4040x-41 is designed to be a cost-effective voltage reference as required in 12-bit data-acquisition
systems. For 12-bit systems operating from 5-V supplies such as the ADS7842 (see Figure 8 ), the LM4040x-41
(4.096 V) permits operation with an LSB of 1 mV.
ADS7842
5V
0 V to V REF
1 AIN0
2 AIN1
V ANA
V DIG
28
27
+
0.1 μ F
+
10 μ F
5-V Analog Supply
3 AIN2
A1 26
909
4 AIN3
A0 25
+
2.2 μ F
5 V REF
6 AGND
CLK 24
BUSY 23
3.2-MHz Clock
BUSY Output
LM4040A-41
7 DB11
8 DB10
9 DB9
WR
CS
RD
22
21
20
Write Input
Read Input
10 DB8
11 DB7
12 DB6
13 DB5
14 DGND
DB0 19
DB1 18
DB2 17
DB3 16
DB4 15
Figure 8. Data-Acquisition Circuit With LM4040x-41
Copyright ? 2005–2008, Texas Instruments Incorporated
27
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