 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LTC1400CS8 Datasheet(PDF) 10 Page - Linear Technology |
|
||||||||||||||||||||||||||||||
LTC1400CS8 Datasheet(HTML) 10 Page - Linear Technology |
|
|
10 / 20 page  10 LTC1400 APPLICATIONS INFORMATION trimmed to 2.42V. It is internally connected to the DAC and is available at Pin 3 to provide up to 1mA of current to an external load. For minimum code transition noise, the reference output should be decoupled with a capacitor to filter wideband noise from the reference (10 µF tantalum in parallel with a 0.1 µF ceramic). The VREF pin can be driven with a DAC or other means to provide input span adjust- ment in bipolar mode. The VREF pin must be driven to at least 2.45V to prevent conflict with the internal reference. The reference should not be driven to more than 5V. Figure 6 shows an LT 1306 op amp driving the reference pin. Figure 7 shows a typical reference, the LT1019A-5 connected to the LTC1360. This will provide an improved drift (equal to the maximum 5ppm/ °C of the LT1019A-5) and a ±4.231V full scale. If VREF is forced lower than 2.42V, the REFRDY bit in the serial data output will be forced to low. LTC1400 • F07 10 µF 3 Ω INPUT RANGE ±4.231V (= ±0.846VREF) –5V LT1019A-5 10V VIN VOUT GND 5V AIN VREF GND LTC1400 VCC VSS Figure 7. Supplying a 5V Reference Voltage to the LTC1400 with the LT1019A-5 UNIPOLAR / BIPOLAR OPERATION AND ADJUSTMENT Figure 8 shows the ideal input/output characteristics for the LTC1400. The code transitions occur midway between successive integer LSB values (i.e., 0.5LSB, 1.5LSB, 2.5LSB, … FS – 1.5LSB). The output code is natural binary with 1LSB = 4.096/4096 = 1mV. Figure 9 shows the input/output transfer characteristics for the bipolar mode in two’s complement format. Figure 8. LTC1400 Unipolar Transfer Characteristics INPUT VOLTAGE (V) 0V FS – 1LSB LTC1400 • F08 111...111 111...110 111...101 111...100 000...000 000...001 000...010 000...011 1 LSB UNIPOLAR ZERO 1LSB = FS 4096 4.096 4096 = Figure 9. LTC1400 Bipolar Transfer Characteristics INPUT VOLTAGE (V) 0V –1 LSB LTC11400 • F09 011...111 011...110 000...001 000...000 100...000 100...001 111...110 1 LSB BIPOLAR ZERO 111...111 FS/2 – 1LSB –FS/2 Unipolar Offset and Full-Scale Error Adjustments In applications where absolute accuracy is important, offset and full-scale errors can be adjusted to zero. Figure 10a shows the extra components required for full-scale Figure 6. Driving the VREF with the LT1360 Op Amp LTC1400 • F06 – + VREF(OUT) ≥ 2.45V AIN VREF GND 10 µF 3 Ω INPUT RANGE ±0.846VREF(OUT) 5V –5V LTC1400 LT1360 VCC VSS |
Similar Part No. - LTC1400CS8 |
|
Similar Description - LTC1400CS8 |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
