Datasheet LTZ1000, LTZ1000A (Analog Devices) - 6
| Fabricante | Analog Devices |
| Descripción | Ultra Precision Reference |
| Páginas / Página | 8 / 6 — Typical applicaTions. Averaging Reference Voltage for Lower Noise and … |
| Formato / tamaño de archivo | PDF / 175 Kb |
| Idioma del documento | Inglés |
Typical applicaTions. Averaging Reference Voltage for Lower Noise and Better Stability. Improving Supply Rejection
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LTZ1000/LTZ1000A
Typical applicaTions Averaging Reference Voltage for Lower Noise and Better Stability Improving Supply Rejection
VIN 15V V 1.5k SUPPLY REJECTION 0.01% IN V 15V OUT1 AT VOUT1 = 20mV/V 1.6k 1.6k 50Ω SUPPLY REJECTION AT 30Ω* 30Ω* VOUT2 VOUT2 = 3mV/V 150Ω OUTPUT IC 1000 TA04 150Ω 150Ω 1000 TA03 *R = kT q IC
Adjusting Temperature Coefficient in Unstabilized Applications
15V 1 MIN VOUT+ * R1 ON OFF 70k 200Ω* 3 1N4148 1 1 MIN 3 + 5 6 LT1006 2 HEATER – 4 4 7 120Ω 2 0.022µF 1N4148 * PULSE HEATER ON AND OFF TO HEAT AND COOL THE REFERENCE. ADJUST R1 FOR MINIMUM VOLTAGE CHANGE THROUGH A TEMPERATURE CYCLE. THE –2mV/°C TEMPCO OF THE VBE CANCELS THE +2mV/°C TEMPCO OF THE ZENER. 1000 TA05
7V Positive Reference Circuit
ZENER + SENSE V+ 15V R4 R3 3 R2 13k 70k 70k 1N4148 + 5 3 + 8 1k 7 A1 A2 1 2N3904 8 LT1013 5 LT1013 10k – 6 2 – 4 7 1M 4 0.1µF 400k* ZENER – SENSE 1 0.1µF R5 R1 0.002µF 1k 120Ω GROUND ZENER – FORCE 1N4148 2 HEATER RETURN (TIED TO GROUND) *PROVIDES TC COMPENSATION, DELETE FOR LTZ1000A APPROXIMATE CHANGE IN REFERENCE VOLTAGE FOR A 100ppm (0.01%) CHANGE IN RESISTOR VALUES: ∆R(Ω) ∆VZ R1 0.012Ω 1ppm R2 7Ω 0.3ppm R3 7Ω 0.2ppm R4/R5 RATIO ∆R = 0.01% 1ppm BOTH A1 AND A2 CONTRIBUTE LESS THAN 2µV OF OUTPUT DRIFT OVER A 50°C RANGE 1000 TA06 1000afe 6 For more information www.linear.com/LTZ1000 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Revision History Package Description Related Parts
Typical applicaTions Averaging Reference Voltage for Lower Noise and Better Stability Improving Supply Rejection
VIN 15V V 1.5k SUPPLY REJECTION 0.01% IN V 15V OUT1 AT VOUT1 = 20mV/V 1.6k 1.6k 50Ω SUPPLY REJECTION AT 30Ω* 30Ω* VOUT2 VOUT2 = 3mV/V 150Ω OUTPUT IC 1000 TA04 150Ω 150Ω 1000 TA03 *R = kT q IC
Adjusting Temperature Coefficient in Unstabilized Applications
15V 1 MIN VOUT+ * R1 ON OFF 70k 200Ω* 3 1N4148 1 1 MIN 3 + 5 6 LT1006 2 HEATER – 4 4 7 120Ω 2 0.022µF 1N4148 * PULSE HEATER ON AND OFF TO HEAT AND COOL THE REFERENCE. ADJUST R1 FOR MINIMUM VOLTAGE CHANGE THROUGH A TEMPERATURE CYCLE. THE –2mV/°C TEMPCO OF THE VBE CANCELS THE +2mV/°C TEMPCO OF THE ZENER. 1000 TA05
7V Positive Reference Circuit
ZENER + SENSE V+ 15V R4 R3 3 R2 13k 70k 70k 1N4148 + 5 3 + 8 1k 7 A1 A2 1 2N3904 8 LT1013 5 LT1013 10k – 6 2 – 4 7 1M 4 0.1µF 400k* ZENER – SENSE 1 0.1µF R5 R1 0.002µF 1k 120Ω GROUND ZENER – FORCE 1N4148 2 HEATER RETURN (TIED TO GROUND) *PROVIDES TC COMPENSATION, DELETE FOR LTZ1000A APPROXIMATE CHANGE IN REFERENCE VOLTAGE FOR A 100ppm (0.01%) CHANGE IN RESISTOR VALUES: ∆R(Ω) ∆VZ R1 0.012Ω 1ppm R2 7Ω 0.3ppm R3 7Ω 0.2ppm R4/R5 RATIO ∆R = 0.01% 1ppm BOTH A1 AND A2 CONTRIBUTE LESS THAN 2µV OF OUTPUT DRIFT OVER A 50°C RANGE 1000 TA06 1000afe 6 For more information www.linear.com/LTZ1000 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Revision History Package Description Related Parts