Datasheet LTC6943 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | Micropower, Dual Precision Instrumentation Switched Capacitor Building Block |
| 页数 / 页 | 16 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS (Test Circuits 2 through 4). … |
| 文件格式/大小 | PDF / 250 Kb |
| 文件语言 | 英语 |
TYPICAL PERFOR A CE CHARACTERISTICS (Test Circuits 2 through 4). Oscillator Frequency, fOSC. Break-Before-Make Time, t
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LTC6943
W U TYPICAL PERFOR A CE CHARACTERISTICS (Test Circuits 2 through 4) Oscillator Frequency, fOSC C Break-Before-Make Time, t OSC Pin ISINK, ISOURCE NOV, vs Ambient Temperature vs Supply Voltage vs Supply Voltage
350 100 80 COSC = 0pF T A) A = 25°C µ I 300 SINK, TA = –55°C 70 VS = 5V 75 250 I 60 SINK, TA = 25°C 200 VS = 10V ISOURCE, TA = –55°C 50 (kHz) 50 (ns) ISOURCE, TA = 25°C 150 f OSC V t NOV 40 S = 15V 100 25 30 ISINK, TA = 125°C 50 20 PIN 14 SOURCE OR SINK CURRENT ( ISOURCE, TA = 125°C 0 0 10 –50 –25 0 25 50 75 100 125 0 2 4 6 8 10 12 14 16 18 0 2 4 6 8 10 12 14 16 18 20 TEMPERATURE (°C) VSUPPLY (V) LTC1043 • TPC11 6943 TPC10 LTC1043 • TPC12
W BLOCK DIAGRA
S1A 6 7 S2A 8 9 C + SHA A 10 C – A S3A 11 12 S4A CHARGE BALANCING CIRCUITRY S1B 5 4 S2B 1 C + B 2 C – B S3B 16 13 S4B CHARGE BALANCING CIRCUITRY THE CHARGE BALANCING CIRCUITRY SAMPLES THE VOLTAGE AT S3 WITH RESPECT TO S4 (PIN 14 HIGH) AND INJECTS A NON-OVERLAPPING 3 V+ SMALL CHARGE AT THE C+ PIN (PIN 14 LOW). CLOCK THIS BOOSTS THE CMRR WHEN THE LTC6943 IS USED AS AN INSTRUMENTATION AMPLIFIER FRONT END. V+ FOR MINIMUM CHARGE INJECTION IN OTHER TYPES OF COSC 14 OSCILLATOR 15 V– APPLICATIONS, S3A AND S3B SHOULD BE GROUNDED V– THE SWITCHES ARE TIMED AS SHOWN WITH PIN 14 HIGH 6943 • BD01 6943f 4
W U TYPICAL PERFOR A CE CHARACTERISTICS (Test Circuits 2 through 4) Oscillator Frequency, fOSC C Break-Before-Make Time, t OSC Pin ISINK, ISOURCE NOV, vs Ambient Temperature vs Supply Voltage vs Supply Voltage
350 100 80 COSC = 0pF T A) A = 25°C µ I 300 SINK, TA = –55°C 70 VS = 5V 75 250 I 60 SINK, TA = 25°C 200 VS = 10V ISOURCE, TA = –55°C 50 (kHz) 50 (ns) ISOURCE, TA = 25°C 150 f OSC V t NOV 40 S = 15V 100 25 30 ISINK, TA = 125°C 50 20 PIN 14 SOURCE OR SINK CURRENT ( ISOURCE, TA = 125°C 0 0 10 –50 –25 0 25 50 75 100 125 0 2 4 6 8 10 12 14 16 18 0 2 4 6 8 10 12 14 16 18 20 TEMPERATURE (°C) VSUPPLY (V) LTC1043 • TPC11 6943 TPC10 LTC1043 • TPC12
W BLOCK DIAGRA
S1A 6 7 S2A 8 9 C + SHA A 10 C – A S3A 11 12 S4A CHARGE BALANCING CIRCUITRY S1B 5 4 S2B 1 C + B 2 C – B S3B 16 13 S4B CHARGE BALANCING CIRCUITRY THE CHARGE BALANCING CIRCUITRY SAMPLES THE VOLTAGE AT S3 WITH RESPECT TO S4 (PIN 14 HIGH) AND INJECTS A NON-OVERLAPPING 3 V+ SMALL CHARGE AT THE C+ PIN (PIN 14 LOW). CLOCK THIS BOOSTS THE CMRR WHEN THE LTC6943 IS USED AS AN INSTRUMENTATION AMPLIFIER FRONT END. V+ FOR MINIMUM CHARGE INJECTION IN OTHER TYPES OF COSC 14 OSCILLATOR 15 V– APPLICATIONS, S3A AND S3B SHOULD BE GROUNDED V– THE SWITCHES ARE TIMED AS SHOWN WITH PIN 14 HIGH 6943 • BD01 6943f 4