AD652AQ Analog Devices Inc, AD652AQ Datasheet
AD652AQ
Manufacturer Part Number
AD652AQ
Description
IV V-F CONVERTER SYNC 16-CDIP
Manufacturer
Analog Devices Inc
Type
Voltage to Frequencyr
Specifications of AD652AQ
Rohs Status
RoHS non-compliant
Frequency - Max
2MHz
Full Scale
±50ppm/°C
Linearity
±0.02%
Mounting Type
Through Hole
Package / Case
16-CDIP (0.300", 7.62mm)
Full Scale Range
1MHz To 2MHz
Linearity %
0.02%
Supply Voltage Range
± 6V To ± 18V
Digital Ic Case Style
DIP
No. Of Pins
16
Frequency Max
2MHz
Termination Type
Through Hole
Converter Function
VFC
Full Scale Frequency
2000
Power Supply Requirement
Single/Dual
Single Supply Voltage (max)
36V
Single Supply Voltage (min)
12V
Dual Supply Voltage (typ)
±15V
Dual Supply Voltage (min)
±6V
Dual Supply Voltage (max)
±18V
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Operating Temperature Classification
Industrial
Package Type
CDIP
Converter Type
Voltage to Frequency
Current, Quiescent Supply
±11 mA (Typ.)
Frequency Range
5 MHz (Typ.)
Input Impedance
20 Kiloohms
Number Of Pins
20
Temperature, Operating, Maximum
85 °C
Temperature, Operating, Minimum
-40 °C
Voltage, Range
±6 to ±18 V
Voltage, Supply
36 V
Filter Terminals
Through Hole
Rohs Compliant
No
Calibration Error Fs Typ
5%
Lead Free Status / Rohs Status
Not Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AD652AQ
Manufacturer:
TOSHIBA
Quantity:
670
FEATURES
Full-scale frequency (up to 2 MHz) set by external system
Extremely low linearity error (0.005% max at 1 MHz FS,
No critical external components required
Accurate 5 V reference voltage
Low drift (25 ppm/°C max)
Dual- or single-supply operation
Voltage or current input
MIL-STD-883 compliant versions available
PRODUCT DESCRIPTION
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 inher-
ent monotonicity of the transfer function and wide range of
clock frequencies allow the conversion time and resolution to
be optimized for specific applications.
The AD652 uses a variation of the 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,
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.
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
clock
0.02% max at 2 MHz FS)
V
IN
R
IN
1mA
INTEGRATOR
H
–V
S
FUNCTIONAL BLOCK DIAGRAM
L
C
INT
COMPARATOR
5V
Figure 1.
AND
Voltage-to-Frequency Converter
D FLOP
The AD652 is available in five performance grades. The 20-lead
PLCC-packaged JP and KP grades are specified for operation
over the 0°C to +70°C commercial temperature range. The
16-lead CERDIP-packaged AQ and BQ grades are specified for
operation over the −40°C to +85°C industrial temperature
range. The AD652SQ is available for operation over the full
−55°C to +125°C extended temperature range.
PRODUCT HIGHLIGHTS
1. The use of an external clock to set the full-scale frequency
2. The AD652 synchronous VFC requires only one external
3. The AD652 includes a buffered, accurate 5 V reference.
4. The AD652’s clock input is TTL and CMOS compatible and
5. The AD652 can also be configured for use as a synchronous
6. The AD652 is available in versions compliant with
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
D
CLOCK IN
allows the AD652 to achieve linearity and stability far
superior to other monolithic VFCs. By using the same clock
to drive the AD652 and set the counting period (through a
suitable divider), conversion accuracy is maintained
independent of variations in clock frequency.
component (a noncritical integrator capacitor) for
operation.
can also be driven by sources referred to the negative power
supply. The flexible open-collector output stage provides
sufficient current sinking capability for TTL and CMOS
logic, as well as for optical couplers and pulse transformers.
A capacitor-programmable one-shot is provided for selec-
tion of optimum output pulse width for power reduction.
F/V converter for isolated analog signal transmission.
MILSTD-883. Refer to the Analog Devices Military
Products Databook or current AD652/883B data sheet for
detailed specifications.
CK
Q
D
G Q
LATCH
Q
Monolithic Synchronous
SHOT
ONE
© 2004 Analog Devices, Inc. All rights reserved.
C
OS
www.analog.com
AD652
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AD652AQ Summary of contents
Page 1
FEATURES Full-scale frequency ( MHz) set by external system clock Extremely low linearity error (0.005% max at 1 MHz FS, 0.02% max at 2 MHz FS) No critical external components required Accurate 5 V reference voltage Low drift ...
Page 2
... AD652JP 50 ppm/°C max AD652JP-REEL 50 ppm/°C max AD652JP-REEL7 50 ppm/°C max AD652KP 25 ppm/°C max AD652KP-REEL 25 ppm/°C max 2 50 ppm/°C max AD652AQ 2 AD652BQ 25 ppm/°C max 2 AD652SE/883B 50 ppm/°C max 2 AD652SQ 50 ppm/°C max 2 AD652SQ/883B 50 ppm/°C max Plastic Leaded Chip Carrier ...