Quick Detail:
Integrated Circuit Voltage-to-Frequency Converter
Description:
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-tofrequency 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 (1 µV/°C typ) input amplifier allows operation directly from small signals (e.g., thermocouples or strain gages) while offering a high (250 MΩ) 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 14-lead ceramic DIP or a 10-lead 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.
Applications:
Low Cost A–D Conversion
Versatile Input Amplifier
Positive or Negative Voltage Modes
Negative Current Mode
High Input Impedance, Low Drift
Single Supply, 5 V to 36 V
Linearity: 0.05% FS
Low Power: 1.2 mA Quiescent Current
Full-Scale Frequency up to 100 kHz
1.00 V Reference
Thermometer Output (1 mV/K)
F-V Applications
MIL-STD-883 Compliant Versions Available
Specifications:
Datasheets |
AD537 |
Product Photos |
505-14-CDIP |
Standard Package |
1 |
Category |
Integrated Circuits (ICs) |
Family |
PMIC - V/F and F/V Converters |
Series |
- |
Packaging |
Tube |
Type |
Voltage to Frequency |
Frequency - Max |
100kHz |
Full Scale |
±30ppm/°C |
Linearity |
±0.05% |
Mounting Type |
Through Hole |
Package / Case |
14-CDIP (0.300", 7.62mm) |
Supplier Device Package |
14-CDIP |
Catalog Page |
740 (CN081 PDF) |
Competitive Advantage:
Warranty :180days for all goods
Free shipping:Order over $600 win a free shipment fee:goods weight below 3Kg.
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