The AD652 Synchronous Voltage-to-Frequency Converter (SVFC) is a powerful building block for precision analog-to-digital conversion, offering typical nonlinearity of 0.002% (0.005% maximum) at a 100 kHz output frequency. The inherent monotonicity of the transfer function and wide range of clock frequencies allows the conversion time and resolution to be optimized for specific applications.
The AD652 uses a variation of the popular charge-balancing technique to perform the conversion function. The AD652 uses an external clock to define the full-scale output frequency, rather than relying on the stability of an external capacitor. The result is a more stable, more linear transfer function, with significant application benefits in both single and multichannel systems.
Gain drift is minimized using a precision low drift reference and low TC on-chip thin-film scaling resistors. Furthermore, the initial gain error is reduced to less than 0.5% by the use of laser-wafer-trimming.
The analog and digital sections of the AD652 have been designed to allow operation from a single-ended power source, simplifying its use with isolated power supplies.
The AD652 is available in five performance grades. The 20-pin PLCC packaged JP and KP grades are specified for operation over the 0°C to +70°C commercial temperature range. The 16- pin cerdip-packaged AQ and BQ grades are specified for operation over the -40°C to +85°C industrial temperature range, and the AD652SQ is available for operation over the full -55°C to +125°C extended temperature range.
Features and Benefits
| Analog to Digital Converters |
Document | note |
AD652: Monolithic Synchronous Voltage-to-Frequency Converter Data Sheet (Rev. C) | PDF 779 kB |
AD652: Military Data Sheet |
Document | note |
AN-276: Analog to Digital Conversion by Using V/F Converters | PDF 646 kB |
Document | note |
Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
---|---|---|---|---|---|---|
5962-9322201MEA Production | 16 ld CerDIP | OTH 25 | -55 to 125C | 39.51 | 35.72 | N |
AD652AQ Production | 16 ld CerDIP | OTH 25 | -40 to 85C | 13.66 | 11.98 | N |
AD652AQ/+ Production | 16 ld CerDIP | OTH 25 | -40 to 85C | 0 | 0 | N |
AD652BQ Production | 16 ld CerDIP | OTH 25 | -40 to 85C | 20.5 | 18.81 | N |
AD652JP Production | 20 ld PLCC | OTH 49 | 0 to 70C | 0 | 0 | N |
AD652JP-REEL7 Production | 20 ld PLCC | REEL 250 | 0 to 70C | 0 | 0 | N |
AD652JPZ Production | 20 ld PLCC | OTH 49 | 0 to 70C | 13.2 | 11.24 | Y |
AD652JPZ-REEL Production | 20 ld PLCC | REEL 1000 | 0 to 70C | 0 | 11.24 | Y |
AD652JPZ-REEL7 Production | 20 ld PLCC | REEL 250 | 0 to 70C | 0 | 11.24 | Y |
AD652KP Production | 20 ld PLCC | OTH 49 | 0 to 70C | 0 | 0 | N |
AD652KPZ Production | 20 ld PLCC | OTH 49 | 0 to 70C | 15.63 | 12.92 | Y |
AD652KPZ-REEL Production | 20 ld PLCC | REEL 1000 | 0 to 70C | 0 | 12.92 | Y |
AD652SE/883B Production | 20 ld LCC | OTH 54 | -55 to 125C | 38.38 | 34.5 | N |
AD652SQ Production | 16 ld CerDIP | OTH 25 | -55 to 125C | 25.64 | 22.22 | N |