Overview
The LT1167CS8 is a low-power, precision instrumentation amplifier produced by Analog Devices Inc. This amplifier is notable for its ability to set gains from 1 to 10,000 using only one external resistor. It features low voltage noise of 7.5nV/√Hz at 1kHz and low power dissipation, typically 0.9mA for supplies ranging from ±2.3V to ±15V. The LT1167CS8 is laser trimmed for very low input offset voltage (40μV max), drift (0.3μV/°C), and high common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR).
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Supply Voltage | ±20V | V | |||
| Differential Input Voltage | Within the Supply Voltage | ±40V | V | ||
| Input Voltage | Equal to Supply Voltage | ±20V | V | ||
| Input Current | Note 3 | ±20mA | mA | ||
| Output Short-Circuit Duration | Indefinite | ||||
| Operating Temperature Range | -40°C | 85°C | °C | ||
| Storage Temperature Range | -65°C | 150°C | °C | ||
| Lead Temperature (Soldering, 10 sec) | Note 1 | 300°C | °C | ||
| Gain Range | G = 1 + (49.4k/RG) | 1 | 10,000 | ||
| Gain Error (G = 10) | 0.008% | 0.08% | 0.10% | % | |
| Gain Nonlinearity (G = 1000) | VO = ±10V | 1 | 10 | 40 | ppm |
| Input Offset Voltage | 40μV | μV | |||
| Input Offset Voltage Drift | 0.3μV/°C | μV/°C | |||
| CMRR (G = 1) | 90dB | dB | |||
| PSRR (G = 1) | 105dB | dB | |||
| Input Bias Current | 350pA | pA | |||
| Supply Current | 1.3mA | mA | |||
| Voltage Noise (1kHz) | 7.5nV/√Hz | nV/√Hz |
Key Features
- Single Resistor Gain Programmable: Gains from 1 to 10,000 set by one external resistor.
- Low Voltage Noise: 7.5nV/√Hz at 1kHz.
- Low Power Dissipation: Typically 0.9mA for ±2.3V to ±15V supplies.
- High Accuracy: 10ppm maximum nonlinearity, 0.08% max gain error (G = 10).
- Low Input Offset Voltage and Drift: 40μV max, 0.3μV/°C.
- High CMRR and PSRR: 90dB and 105dB respectively at G = 1.
- Low Input Bias Current: 350pA max.
- Wide Supply Range: ±2.3V to ±18V.
- Compact Packaging: Available in 8-pin PDIP and SO packages.
- ESD Protection: Up to 13kV (human body) with two external 5k resistors.
Applications
- Bridge Amplifiers: Suitable for bridge configurations in various measurement systems.
- Strain Gauge Amplifiers: Ideal for amplifying signals from strain gauges.
- Thermocouple Amplifiers: Used in thermocouple-based temperature measurement systems.
- Differential to Single-Ended Converters: Converts differential signals to single-ended signals.
- Medical Instrumentation: Suitable for medical devices requiring high precision and low noise.
Q & A
- What is the LT1167CS8?
The LT1167CS8 is a low-power, precision instrumentation amplifier that requires only one external resistor to set gains of 1 to 10,000.
- What is the voltage noise of the LT1167CS8?
The voltage noise is 7.5nV/√Hz at 1kHz.
- What is the typical supply current of the LT1167CS8?
The typical supply current is 0.9mA for ±2.3V to ±15V supplies.
- What is the input offset voltage of the LT1167CS8?
The input offset voltage is 40μV max.
- What is the CMRR of the LT1167CS8 at G = 1?
The CMRR is 90dB at G = 1.
- What is the PSRR of the LT1167CS8 at G = 1?
The PSRR is 105dB at G = 1.
- What are the typical operating temperature ranges for the LT1167CS8?
The operating temperature ranges are 0°C to 70°C and -40°C to 85°C depending on the package.
- What packages are available for the LT1167CS8?
The LT1167CS8 is available in 8-pin PDIP and SO packages.
- Does the LT1167CS8 have ESD protection?
Yes, it has ESD protection up to 13kV (human body) with two external 5k resistors.
- What are some common applications of the LT1167CS8?
Common applications include bridge amplifiers, strain gauge amplifiers, thermocouple amplifiers, differential to single-ended converters, and medical instrumentation.
