AD650
NOT RECOMMENDED FOR NEW DESIGNSVoltage-to-Frequency and Frequency-to-Voltage Converter
- Part Models
- 8
- 1ku List Price
- Starting From $21.83
Overview
- 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
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.
Documentation
Data Sheet 1
Application Note 4
Technical Articles 1
Frequently Asked Question 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD650ACHIPS | none available | ||
| AD650AD | 14-Lead Side Brazed CerDIP | ||
| AD650BD | 14-Lead Side Brazed CerDIP | ||
| AD650JNZ | 14-Lead PDIP | ||
| AD650JPZ | 20-Lead Flatpack | ||
| AD650KNZ | 14-Lead PDIP | ||
| AD650SD | 14-Lead Side Brazed CerDIP | ||
| AD650SD/883B | 14-Lead Side Brazed CerDIP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jul 16, 2025 - 25_0091 Qualification of Wafer Fabrication Site Analog Devices, Inc. Camas WA for (Bipolar) Products |
||
| AD650ACHIPS | ||
| AD650AD | ||
| AD650BD | ||
| AD650JNZ | ||
| AD650JPZ | ||
| AD650KNZ | ||
| AD650SD | ||
| AD650SD/883B | ||
|
Jun 6, 2012 - 12_0066 Add capacity for Burn In of Hermetic, 883 & QMLQ/Class B devices at TSSI Cavite |
||
| AD650AD | ||
| AD650BD | ||
| AD650SD | ||
| AD650SD/883B | ||
|
Nov 9, 2011 - 11_0050 Transfer of ADI Hermetics Assembly location from Paranaque, Manila to General Trias, Cavite Philippines |
||
| AD650AD | ||
| AD650BD | ||
| AD650SD | ||
| AD650SD/883B | ||
|
Nov 9, 2011 - 11_0182 Test Site Transfer from Analog Devices Philippines Inc in Paranaque to Analog Devices General Trias in Cavite, Philippines |
||
| AD650AD | ||
| AD650BD | ||
| AD650JNZ | ||
| AD650JPZ | ||
| AD650KNZ | ||
| AD650SD | ||
| AD650SD/883B | ||
|
Mar 29, 2021 - 21_0033 Assembly Site Transfer for 14/16L 300_MIL PDIP to Cirtek |
||
| AD650JNZ | ||
| AD650KNZ | ||
|
Aug 19, 2009 - 07_0024 Package Material Changes for SOT23, MiniSO, MQFP, PDIP, PLCC, SOIC (narrow and wide body), SSOP, TSSOP and TSSOP exposed pad |
||
| AD650JNZ | ||
| AD650KNZ | ||
|
Apr 9, 2018 - 16_0026 Qualify TeamQuest Technology, Inc. for Burn-in and Life Test of Military and Aerospace Devices |
||
| AD650SD/883B | ||
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
AD650 Component Selection Calculator
Open Tool