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The AD537 is a monolithic V-F converter consisting of an input amplifier, a precision oscillator system, an accurate internal reference generator and a high current output stage. Only a single external RC network is required to set up any full-scale (F.S.) frequency up to 100 kHz and any F.S. input voltage up to ±30 V. Linearity error is as low as ±0.05% for 10 kHz F.S., and operation is guaranteed over an 80 dB dynamic range. The overall temperature coefficient (excluding the effects of external components) is typically ±30 ppm/°C. The AD537 operates from a single supply of 5 V to 36 V and consumes only 1.2 mA quiescent current. A temperature-proportional output, scaled to 1.00 mV/K, enables the circuit to be used as a reliable temperature-to-frequency converter; in combination with the fixed reference output of 1.00 V, offset scales such as 0°C or 0°F can be generated. The low drift (1μV/°C typ) input amplifier allows operation directly from small signals (e.g., thermocouples or strain gages) while offering a high (250 M(Ohm) input resistance. Unlike most V-F converters, the AD537 provides a square-wave output, and can drive up to 12 TTL loads, LEDs, very long cables, etc. The excellent temperature characteristics and long-term stability of the AD537 are guaranteed by the primary bandgap reference generator and the low T.C. silicon chromium thin film resistors used throughout. The device is available in either a TO-116 ceramic DIP or a TO-100 metal can; both are hermetically sealed packages. The AD537 is available in three performance/temperature grades; the J and K grades are specified for operation over the 0°C to +70°C range while the AD537S is specified for operation over the extended temperature range, -55°C to +125°C.
AD537JH is a monolithic integrated circuit from Analog Devices. It is a precision, low-cost, low-power, single-supply, 8-bit analog-to-digital converter (ADC). Description: The AD537JH is an 8-bit, low-power, low-cost, single-supply, monolithic ADC. It operates from a single +5 V supply and features a fast conversion rate of 10 μs. The AD537JH has an input range of 0 V to +5 V and a reference input range of 0 V to +5 V. It features an on-chip reference and a built-in reference buffer. Features: 8-bit resolution Low power consumption Single +5 V supply Fast conversion rate of 10 μs Input range of 0 V to +5 V Reference input range of 0 V to +5 V On-chip reference Built-in reference buffer Applications: The AD537JH is suitable for a wide range of applications including data acquisition systems, instrumentation systems, and industrial process control systems. It is also suitable for use in medical imaging systems, automotive systems, and consumer electronics. (For reference only)