Datasheet LTC1050 (Analog Devices) - 8
| Fabricante | Analog Devices |
| Descripción | Precision Zero-Drift Operational Amplifier with Internal Capacitors |
| Páginas / Página | 16 / 8 — APPLICATI. S I FOR ATIO. PIN COMPATIBILITY. LOW SUPPLY OPERATION. TYPICAL … |
| Formato / tamaño de archivo | PDF / 232 Kb |
| Idioma del documento | Inglés |
APPLICATI. S I FOR ATIO. PIN COMPATIBILITY. LOW SUPPLY OPERATION. TYPICAL APPLICATI
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LTC1050
O U U W U APPLICATI S I FOR ATIO
When an external clock is used, it is directly applied to PSRR is guaranteed down to 4.7V (±2.35V) to ensure Pin 5. The internal oscillator signal on Pin 5 has very low proper operation down to the minimum TTL specified drive capability and can be overdriven by any external voltage of 4.75V. signal. When the LTC1050 operates on ±5V power sup- plies, the external clock level is TTL compatible.
PIN COMPATIBILITY
Using an external clock can affect performance of the The LTC1050 is pin compatible with the 8-pin versions of LTC1050. Effects of external clock frequency on input 7650, 7652 and other chopper-stabilized amplifiers. The offset voltage and input noise voltage are shown in the 7650 and 7652 require the use of two external capacitors Typical Performance Characteristics section. The sam- connected to Pin 1 and Pin 8 that are not needed for the pling frequency is the external clock frequency divided LTC1050. Pin 1 and Pin 8 of the LTC1050 are not con- by 4. Input bias currents at temperatures below 100°C nected internally while Pin 5 is an optional external clock are dominated by the charge injection of input switches input pin. The LTC1050 can be a direct plug-in for the 7650 and they are basically proportional to the sampling and 7652 even if the two capacitors are left on the circuit frequency. At higher temperatures, input bias currents board. are mainly due to leakage currents of the input protection devices and are insensitive to the sampling frequency. In applications operating from below 16V total power supply, (±8V), the LTC1050 can replace many industry standard operational amplifiers such as the 741, LM101,
LOW SUPPLY OPERATION
LM108, OP07, etc. For devices like the 741 and LM101, The minimum supply for proper operation of the LTC1050 the removal of any connection to Pin 5 is all that is is typically below 4V (±2V). In single supply applications, needed.
O U TYPICAL APPLICATI S Strain Gauge Signal Conditioner with Bridge Excitation
120Ω 2.5V 5V * 5V 350Ω LT1009 BRIDGE 3 + 7 6 OUTPUT LTC1050 10k ± 2.5V 2 301k ZERO – 4 R2 C** RN60C 0.1% – 5V 5V 2 – 7 1N4148 GAIN R1 6 2k TRIM 0.1% LTC1050 2N2907 3 + 1050 TA03 4 51Ω 2W *OPTIONAL REFERENCE OUT TO MONITORING – 5V 10-BIT A/D CONVERTER **AT GAIN = 1000, 10Hz PEAK-TO-PEAK NOISE – 5V IS < 0.5LSB FOR 10-BIT RESOLUTION 1050fb 8
O U U W U APPLICATI S I FOR ATIO
When an external clock is used, it is directly applied to PSRR is guaranteed down to 4.7V (±2.35V) to ensure Pin 5. The internal oscillator signal on Pin 5 has very low proper operation down to the minimum TTL specified drive capability and can be overdriven by any external voltage of 4.75V. signal. When the LTC1050 operates on ±5V power sup- plies, the external clock level is TTL compatible.
PIN COMPATIBILITY
Using an external clock can affect performance of the The LTC1050 is pin compatible with the 8-pin versions of LTC1050. Effects of external clock frequency on input 7650, 7652 and other chopper-stabilized amplifiers. The offset voltage and input noise voltage are shown in the 7650 and 7652 require the use of two external capacitors Typical Performance Characteristics section. The sam- connected to Pin 1 and Pin 8 that are not needed for the pling frequency is the external clock frequency divided LTC1050. Pin 1 and Pin 8 of the LTC1050 are not con- by 4. Input bias currents at temperatures below 100°C nected internally while Pin 5 is an optional external clock are dominated by the charge injection of input switches input pin. The LTC1050 can be a direct plug-in for the 7650 and they are basically proportional to the sampling and 7652 even if the two capacitors are left on the circuit frequency. At higher temperatures, input bias currents board. are mainly due to leakage currents of the input protection devices and are insensitive to the sampling frequency. In applications operating from below 16V total power supply, (±8V), the LTC1050 can replace many industry standard operational amplifiers such as the 741, LM101,
LOW SUPPLY OPERATION
LM108, OP07, etc. For devices like the 741 and LM101, The minimum supply for proper operation of the LTC1050 the removal of any connection to Pin 5 is all that is is typically below 4V (±2V). In single supply applications, needed.
O U TYPICAL APPLICATI S Strain Gauge Signal Conditioner with Bridge Excitation
120Ω 2.5V 5V * 5V 350Ω LT1009 BRIDGE 3 + 7 6 OUTPUT LTC1050 10k ± 2.5V 2 301k ZERO – 4 R2 C** RN60C 0.1% – 5V 5V 2 – 7 1N4148 GAIN R1 6 2k TRIM 0.1% LTC1050 2N2907 3 + 1050 TA03 4 51Ω 2W *OPTIONAL REFERENCE OUT TO MONITORING – 5V 10-BIT A/D CONVERTER **AT GAIN = 1000, 10Hz PEAK-TO-PEAK NOISE – 5V IS < 0.5LSB FOR 10-BIT RESOLUTION 1050fb 8