Datasheet LTC1605-1, LTC1605-2 (Analog Devices) - 10
| Manufacturer | Analog Devices |
| Description | Single Supply 16-Bit, 100ksps, Sampling ADCs |
| Pages / Page | 22 / 10 — applicaTions inForMaTion. Figure 3. Internal or External Reference Source |
| File Format / Size | PDF / 405 Kb |
| Document Language | English |
applicaTions inForMaTion. Figure 3. Internal or External Reference Source
Model Line for this Datasheet
Text Version of Document
LTC1605-1/LTC1605-2
applicaTions inForMaTion
111...111 4k REF 3 BANDGAP 111...110 (2.5V) REFERENCE 2.2μF + VANA UNIPOLAR – ZERO OUTPUT CODE CAP 4 (2.5V) INTERNAL 000...001 FS = 4V 2.2μF CAPACITOR 000...000 1LSB = FS/65536 DAC 1605-1/2 F03 0V 1 FS – 1LSB LSB INPUT VOLTAGE (V) 1605-1/2 F06a
Figure 3. Internal or External Reference Source Figure 6a. LTC1605-1 Unipolar Transfer Characteristics
011...111 0V TO 4V 011...110 BIPOLAR 1 V ZERO OR ±4V 2 IN INPUT 200Ω AGND1 1% 000...001 + 2.2μF LTC1605-1 LTC1605-2 000...000 33.2k 3 1% REF 111...111 4 CAP OUTPUT CODE 111...110 + 2.2μF 5 AGND2 100...001 FS = 8V 1605-1/2 F04 100...000 1LSB = FS/65536
Figure 4. 0V to 4V Input for the LTC1605-1
–FS/2 –1 0V 1 FS/2 – 1LSB
and
±
4V for the LTC1605-2 Without Trim
LSB LSB INPUT VOLTAGE (V) 1605-1/2 F06b
Figure 6B. LTC1605-2 Bipolar Transfer Characteristics
4500 0V TO 4V 1 OR ±4V V 2 IN 4000 INPUT 200Ω AGND1 1% 3500 + 2.2μF LTC1605-1 LTC1605-2 3000 3 33.2k GAIN REF 1% 5V TRIM 2500 576k R4 COUNT 2000 50k + 4 CAP 1500 R3 2.2μF 50k OFFSET 5 1000 TRIM AGND2 500 1605-1/2 F05 0
Figure 5. 0V to 4V Input for the LTC1605-1 and
–5 –4 –3 –2 –1 0 1 2 3 4 5 ±
4V for the LTC1605-2 with Offset and Gain Trim
CODE 1605-1/2 F07
Figure 7. Histogram for 10000 Conversions
160512fa 10 For more information www.linear.com/LTC1605-1
applicaTions inForMaTion
111...111 4k REF 3 BANDGAP 111...110 (2.5V) REFERENCE 2.2μF + VANA UNIPOLAR – ZERO OUTPUT CODE CAP 4 (2.5V) INTERNAL 000...001 FS = 4V 2.2μF CAPACITOR 000...000 1LSB = FS/65536 DAC 1605-1/2 F03 0V 1 FS – 1LSB LSB INPUT VOLTAGE (V) 1605-1/2 F06a
Figure 3. Internal or External Reference Source Figure 6a. LTC1605-1 Unipolar Transfer Characteristics
011...111 0V TO 4V 011...110 BIPOLAR 1 V ZERO OR ±4V 2 IN INPUT 200Ω AGND1 1% 000...001 + 2.2μF LTC1605-1 LTC1605-2 000...000 33.2k 3 1% REF 111...111 4 CAP OUTPUT CODE 111...110 + 2.2μF 5 AGND2 100...001 FS = 8V 1605-1/2 F04 100...000 1LSB = FS/65536
Figure 4. 0V to 4V Input for the LTC1605-1
–FS/2 –1 0V 1 FS/2 – 1LSB
and
±
4V for the LTC1605-2 Without Trim
LSB LSB INPUT VOLTAGE (V) 1605-1/2 F06b
Figure 6B. LTC1605-2 Bipolar Transfer Characteristics
4500 0V TO 4V 1 OR ±4V V 2 IN 4000 INPUT 200Ω AGND1 1% 3500 + 2.2μF LTC1605-1 LTC1605-2 3000 3 33.2k GAIN REF 1% 5V TRIM 2500 576k R4 COUNT 2000 50k + 4 CAP 1500 R3 2.2μF 50k OFFSET 5 1000 TRIM AGND2 500 1605-1/2 F05 0
Figure 5. 0V to 4V Input for the LTC1605-1 and
–5 –4 –3 –2 –1 0 1 2 3 4 5 ±
4V for the LTC1605-2 with Offset and Gain Trim
CODE 1605-1/2 F07
Figure 7. Histogram for 10000 Conversions
160512fa 10 For more information www.linear.com/LTC1605-1
