Datasheet LTC1274, LTC1277 (Analog Devices) - 4
| Hersteller | Analog Devices |
| Beschreibung | 12-Bit, 10mW, 100ksps ADCs with 1µA Shutdown |
| Seiten / Seite | 20 / 4 — DIGITAL I PUTS A D DIGITAL OUTPUTS (Note 5). SYMBOL. PARAMETER. … |
| Dateiformat / Größe | PDF / 241 Kb |
| Dokumentensprache | Englisch |
DIGITAL I PUTS A D DIGITAL OUTPUTS (Note 5). SYMBOL. PARAMETER. CONDITIONS. MIN. TYP. MAX. UNITS. W U. (Note 5). POWER REQUIRE E TS
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LTC1274/LTC1277
U U DIGITAL I PUTS A D DIGITAL OUTPUTS (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IOZ High-Z Output Leakage D11 to D0/8 VOUT = 0V to VDD, CS High ● ±10 µA COZ High-Z Output Capacitance D11 to D0/8 CS High (Note 10) ● 15 pF ISOURCE Output Source Current VOUT = 0V – 10 mA ISINK Output Sink Current VOUT = VDD 10 mA
W U (Note 5) POWER REQUIRE E TS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VDD Positive Supply Voltage (Notes 11, 12) Unipolar and Bipolar Mode 4.75 5.25 V VLOGIC Logic Supply (Notes 11,12) Unipolar and Bipolar Mode (LTC1277) 2.7 to 5.25 V VSS Negative Supply Voltage (Note 11) Bipolar Mode Only – 2.45 – 5.25 V IDD Positive Supply Current fSAMPLE = 100ksps ● 2 4 mA NAP = 0V (LTC1277 Only) ● 180 320 µA SLEEP = 0V ● 0.3 5 µA ISS Negative Supply Current fSAMPLE = 100ksps, Bipolar Mode Only ● 40 70 µA SLEEP = 0V ● 0.3 5 µA PDISS Power Dissipation fSAMPLE = 100ksps ● 10 20 mW NAP = 0V (LTC1277 Only) ● 0.9 1.8 mW SLEEP = 0V (Unipolar/Bipolar) ● 25/50 µW
W U TI I G CHARACTERISTICS (Note 5) See Figures 13 to 17. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
fSAMPLE(MAX) Maximum Sampling Frequency (Note 11) ● 100 ksps tCONV Conversion Time ● 6 8 µs tACQ Acquisition Time ● 0.35 2 µs t1 CS↓ to RD↓ Setup Time (Note 10) ● 0 ns t2 CS↓ to CONVST↓ Setup Time (Note 10) ● 30 ns t3 NAP↑ to CONVST↓ Wake-Up Time (LTC1277 Only) (Note 11) 620 ns t4 CONVST Low Time (Note 13) ● 40 ns t5 CONVST↓ to BUSY↓ Delay CL = 100pF ● 70 150 ns t6 Data Ready Before BUSY↑ CL = 100pF ● 20 65 ns t7 Delay Between Conversions (Note 11) ● 0.35 2 µs t8 Wait Time RD↓ After BUSY↑ (Note 10) ● – 20 ns t9 Data Access Time After RD↓ CL = 20pF (Note 10) 50 110 ns ● 140 ns CL = 100pF 65 125 ns ● 170 ns t10 Bus Relinquish Time CL = 100pF 20 60 90 ns ● 20 100 ns t11 RD Low Time (Note 10) ● t9 ns t12 CONVST High Time (Notes 10, 13) ● 40 ns t13 Aperture Delay of Sample-and-Hold 35 ns t14 SLEEP↑ to REFRDY↑ Wake-Up Time 10µF Bypass at VREF Pin 4.2 ms 4.7µF Bypass at VREF Pin 3.3 ms t15 HBEN↑ to High Byte Data Valid CL = 100pF (LTC1277 Only) ● 35 100 ns 4
U U DIGITAL I PUTS A D DIGITAL OUTPUTS (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IOZ High-Z Output Leakage D11 to D0/8 VOUT = 0V to VDD, CS High ● ±10 µA COZ High-Z Output Capacitance D11 to D0/8 CS High (Note 10) ● 15 pF ISOURCE Output Source Current VOUT = 0V – 10 mA ISINK Output Sink Current VOUT = VDD 10 mA
W U (Note 5) POWER REQUIRE E TS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VDD Positive Supply Voltage (Notes 11, 12) Unipolar and Bipolar Mode 4.75 5.25 V VLOGIC Logic Supply (Notes 11,12) Unipolar and Bipolar Mode (LTC1277) 2.7 to 5.25 V VSS Negative Supply Voltage (Note 11) Bipolar Mode Only – 2.45 – 5.25 V IDD Positive Supply Current fSAMPLE = 100ksps ● 2 4 mA NAP = 0V (LTC1277 Only) ● 180 320 µA SLEEP = 0V ● 0.3 5 µA ISS Negative Supply Current fSAMPLE = 100ksps, Bipolar Mode Only ● 40 70 µA SLEEP = 0V ● 0.3 5 µA PDISS Power Dissipation fSAMPLE = 100ksps ● 10 20 mW NAP = 0V (LTC1277 Only) ● 0.9 1.8 mW SLEEP = 0V (Unipolar/Bipolar) ● 25/50 µW
W U TI I G CHARACTERISTICS (Note 5) See Figures 13 to 17. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
fSAMPLE(MAX) Maximum Sampling Frequency (Note 11) ● 100 ksps tCONV Conversion Time ● 6 8 µs tACQ Acquisition Time ● 0.35 2 µs t1 CS↓ to RD↓ Setup Time (Note 10) ● 0 ns t2 CS↓ to CONVST↓ Setup Time (Note 10) ● 30 ns t3 NAP↑ to CONVST↓ Wake-Up Time (LTC1277 Only) (Note 11) 620 ns t4 CONVST Low Time (Note 13) ● 40 ns t5 CONVST↓ to BUSY↓ Delay CL = 100pF ● 70 150 ns t6 Data Ready Before BUSY↑ CL = 100pF ● 20 65 ns t7 Delay Between Conversions (Note 11) ● 0.35 2 µs t8 Wait Time RD↓ After BUSY↑ (Note 10) ● – 20 ns t9 Data Access Time After RD↓ CL = 20pF (Note 10) 50 110 ns ● 140 ns CL = 100pF 65 125 ns ● 170 ns t10 Bus Relinquish Time CL = 100pF 20 60 90 ns ● 20 100 ns t11 RD Low Time (Note 10) ● t9 ns t12 CONVST High Time (Notes 10, 13) ● 40 ns t13 Aperture Delay of Sample-and-Hold 35 ns t14 SLEEP↑ to REFRDY↑ Wake-Up Time 10µF Bypass at VREF Pin 4.2 ms 4.7µF Bypass at VREF Pin 3.3 ms t15 HBEN↑ to High Byte Data Valid CL = 100pF (LTC1277 Only) ● 35 100 ns 4