AD654:Low Cost Monolithic Voltage-to-Frequency Converter

AD654: Low Cost Monolithic Voltage-to-Frequency Converter

The AD654 is a monolithic V/F converter consisting of an input amplifier, a precision oscillator system, and a high current output stage. A single RC network is all that is required to set up any full scale (FS) frequency up to 500 kHz and any FS input voltage up to ±30 V. Linearity error is only 0.03% for a 250 kHz FS, and operation is guaranteed over an 80 dB dynamic range. The overall temperature coefficient (excluding the effects of external components) is typically ±50 ppm/°C. The AD654 operates from a single supply of 5 V to 36 V and consumes only 2.0 mA quiescent current.The low drift (4 uV/°C typ) input amplifier allows operation directly from small signals such as thermocouples or strain gauges while offering a high (250 M(ohm)) input resistance. Unlike most V/F converters, the AD654 provides a square-wave output, and can drive up to 12 TTL loads, optocouplers, long cables, or similar loads

AD654 特点

Low Cost
Single or Dual Supply, 5 V to 36 V, ±5 V to ±18 V
Full-Scale Frequency Up to 500 kHz
Minimum Number of External Components Needed
Versatile Input Amplifier
- Positive or Negative Voltage Modes
- Negative Current Mode
- High Input Impedance, Low Drift
Low Power: 2.0 mA Quiescent Current
Low Offset: 1 mV

AD654 技术指标

Architecture: Non-Synchronous
# Channels: 1-Single Ended
Input Voltage Range (V): "i? 1/2 14V
Full Scale Fout (kHz): 500kHz
Accuracy (%/kHz): 0.4
Voltage Supply (V): +/- 5 to +/- 18
Supply Current : 2.5mA

AD654 芯片订购指南

产品型号	封装	引脚	温度范围	包装和数量	报价*(100-499)	报价*1000 pcs
AD654JN 产品状态: 量产	8 ld PDIP	8	商业	Tube, 50	$ 5.00	$ 4.47
AD654JNZ 产品状态: 量产	8 ld PDIP	8	商业	Tube, 50	$ 4.45	$ 4.00
AD654JNZ/+ 产品状态: 量产	8 ld PDIP	8	商业	Tube, 50	$ 7.05	$ 7.05
AD654JR 产品状态: 量产	8 ld SOIC	8	商业	Tube, 98	$ 4.85	$ 4.35
AD654JR-REEL 产品状态: 量产	8 ld SOIC	8	商业	Reel, 2500	-	$ 4.35
AD654JRZ 产品状态: 量产	8 ld SOIC	8	商业	Tube, 98	$ 4.20	$ 3.76
AD654JRZ-REEL 产品状态: 量产	8 ld SOIC	8	商业	Reel, 2500	-	$ 3.76
AD654JRZ-REEL7 产品状态: 量产	8 ld SOIC	8	商业	Reel, 750	-	$ 3.76