|Category||Analog & Mixed-Signal Processing => Amplifiers => Function Modules|
|Description||High Accuracy, 100 KHZ And 1 MHZ Voltage to Frequency Converters|
|Datasheet||Download 458 datasheet
FEATURES High Stability: 5ppm/°C max, Model 458L 15ppm/°C max, Model 460L Low Nonlinearity: 100ppm max, Model 458 150ppm max, Model 460 Versatility: Differential Input Stage Voltage and Current Inputs Floating Inputs: ±10V CMV Wide Dynamic Range: 6 Decades, Model 460 TTL/DTL Compatible Output APPLICATIONS Fast Analog-to-Digital Converter High Resolution Optical Data Link Ratiometric Measurements 2-Wire High Noise Immunity Digital Transmission Long Term Precision Integrator GENERAL DESCRIPTION Models 458 and 460 are high performance, differential input, voltage to frequency modular converters designed for analog to digital applications requiring accuracy and fast data conversion. Model 458 offers a l00kHz full scale frequency, guaranteed nonlinearity of ±0.01% maximum over five decades 100kHz) of operation and guaranteed low maximum gain drift in three model selections; model 458L: 5ppm/°C max; model 458K: 10ppm/°C max; and model 458J: 20ppm/°C max. Model 460 offers a 1MHz full scale frequency, guaranteed maximum nonlinearity of ±0.015% over six decades 1MHz) of operation and guaranteed low maximum gain drift in three selections; model 460L: 15ppm/°C max; model 460K: 25ppm/°C max; and model 460J: 50ppm/°C max. Model 460L is the industry's first 1MHz V/F converter to offer 15ppm/°C maximum gain drift. The differential input stage of models 458 and 460 provide the versatility of either direct interface to off-ground to +11V input signals with common mode voltages (CMV) ±10V, as well as ground referenced positive, +11V or negative, to -11V signals. Both models also accept positive current signals: to +0.5mA, model to +1mA, model 460 for current to frequency (I/F) applications. The rated performance of both models 458 and 460 is achieved without the need for external components or adjustments. Optional adjustments are available for trimming full scale frequency and the input offset voltage. WHERE TO USE MODELS 458 AND 460 The combination of low gain drift, low nonlinearity and the versatility of a differential input with both high speed (100kHz/1MHz) models, offer excellent solutions to a wide variety of demanding applications; in high speed remote data acquisition systems - two wire data transmission over long wires; in 5½ digit DVM's - featuring high resolution A/D conversion, monotonic performance, no missing codes and high noise rejection; in strain gage bridge weighing applications accurate ratiometric measurements over wide dynamic range. DESIGN APPROACH - PRECISION CHARGE BALANCE Models 458 and 460 incorporate a superior charge balance design that result in high linearity and temperature stability - see Figure 1. Both models accept unipolar, single-ended voltage or current input signals directly. By offsetting the input using the current terminal, models 458 and 460 will accept bipolar input voltages to ±5V.
Information furnished by Intronics is believed to be accurate and reliable. However, no responsibility is assumed by Intronics for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intronics.
1400 Providence Highway, Building #2 Norwood, MA 02062 Phone (781) 551-5500 FAX (781) 551-5555 www.intronicspower.com
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