AD650: Voltage-to-Frequency and Frequency-to-Voltage Converter
The AD650 V/F/V (voltage-to-frequency or frequency-to-voltage converter) provides a combination of high frequency operation and low nonlinearity previously unavailable in monolithic form. The ...More
AD650: Voltage-to-Frequency and Frequency-to-Voltage Converter
Product Description
The AD650 V/F/V (voltage-to-frequency or frequency-to-voltage converter) provides a combination of high frequency operation and low nonlinearity previously unavailable in monolithic form. The inherent monotonicity of the V/F transfer function makes the AD650 useful as a high-resolution analog-to-digital converter. A flexible input configuration allows a wide variety of input voltage and current formats to be used, and an open-collector output with separate digital ground allows simple interfacing to either standard logic families or opto-couplers.
The linearity error of the AD650 is typically 20 ppm (0.002% of full scale) and 50 ppm (0.005%) maximum at 10 kHz full scale. This corresponds to approximately 14-bit linearity in an analog-to-digital converter circuit. Higher full-scale frequencies or longer count intervals can be used for higher resolution conversions. The AD650 has a useful dynamic range of six decades allowing extremely high resolution measurements. Even at 1 MHz full scale, linearity is guaranteed less than 1000 ppm (0.1%) on the AD650KN, KP, BD and SD grades.
In addition to analog-to-digital conversion, the AD650 can be used in isolated analog signal transmission applications, phased locked-loop circuits, and precision stepper motor speed controllers. In the F/V mode, the AD650 can be used in precision tachometer and FM demodulator circuits.
The input signal range and full-scale output frequency are user-programmable with two external capacitors and one resistor. Input offset voltage can be trimmed to zero with an external potentiometer.
The AD650JN and AD650KN are offered in a plastic 14-pin DIP package. The AD650JP and AD650KP are available in a 20-pin plastic leaded chip carrier (PLCC). Both plastic packaged versions of the AD650 are specified for the commercial (0°C to +70°C) temperature range. For industrial temperature range (-25°C to +85°C) applications, the AD650AD and AD650BD are offered in a ceramic package. The AD650SD is specified for the full -55°C to +125°C extended temperature range.
- Data Sheet Rev D, 03/2006 (pdf 434kB)
- (About Data Sheets)
Design Tools
AD650 Component Selection Calculator
This tool calculates values for Cint, Rint, and Cos for frequency-to-voltag...
Features
- V/F Conversion to 1 MHz
- Reliable Monolithic Construction
- Very Low Nonlinearity
- 0.002% typ at 10 kHz
- 0.005% typ at 100 kHz
- 0.07% typ at 1 MHz
- Input Offset Trimmable to Zero
- CMOS or TTL Compatible
- Unipolar, Bipolar or Differential V/F
- V/F or F/V Conversion
- Available in Surface Mount
- MIL-STD-883 Compliant Versions Available
Diagrams
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- Other Diagrams
- Symbols and Footprints
Functional Block Diagram for AD650
Voltage-to-Frequency and Frequency-to-Voltage Converter
Other Diagrams for AD650
Voltage-to-Frequency and Frequency-to-Voltage Converter
AD650 Pin Configurations
Functional Block Diagram for AD650
| Part# | Architecture | # Channels | Input Voltage Range (V) | Full Scale Fout (kHz) | Reference Voltage (V) | Accuracy (%/kHz) | Input Clk Frequency (MHz) | Voltage Supply (V) | Supply Current (max) | Package | Price* (1000-4999) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| AD537 | Non-Synchronous | 1-Single Ended | ±11 | 150 | 1 | 0.25 | - | +/- 5 to +/- 18 | 2.5 | 14-Lead CerDIP | $9.65 |
| AD650 | Non-Synchronous | 1-Single Ended | +11 | 1000 | - | 0.1 | - | +/- 9 to +/- 18 | 8 | 14-Lead CerDIP, 14-Lead PDIP, 20-Lead PLCC | $8.02 |
| AD652 | Synchronous | 1-Single Ended | ±10 | 2500 | 5 | 2 | 5 | +/- 6 to +/- 15 | 15 | 20-Lead PLCC | $9.92 |
| AD654 | Non-Synchronous | 1-Single Ended | ±14 | 500 | - | 0.4 | - | +/- 5 to +/- 18 | 2.5 | 8-Lead PDIP, 8-Lead SOIC | $3.76 |
| AD7740 | Synchronous | 1-Single Ended | +2.5 | 500 | 2.5 | 1 | 1 | 3 to 5.25 | 1.5 | 8-Lead MSOP, 8-Lead SOT-23 | $0.91 |
| AD7741 | Synchronous | 1-Single Ended | +2.5 | 3072 | 2.5 | 2 | 6.144 | 4.75 to 5.25 | 8 | 8-Lead PDIP, 8-Lead SOIC | $1.76 |
| AD7742 | Synchronous | 2-Differential, 3-Pseudo Differential | +3.5 | 3072 | 2.5 | 2 | 6.144 | 4.75 to 5.25 | 8 | 16-Lead PDIP, 16-Lead SOIC | - |
| ADVFC32 | Non-Synchronous | 1-Single Ended | +10 | 500 | - | 0.2 | - | +/- 9 to +/- 18 | 8 | 14-Lead PDIP | $6.14 |
* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S.
Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.