UFDC-1M-16 Datasheet, PDF (2/3 Pages) List of Unclassifed Manufacturers – High-Speed Universal Frequency-to-Digital Converter

• Phase shift, ϕ_x 0 - 360⁰ at f_xmax = 500 kHz at 50 %
duty-cycle
• Time interval between start – and stop-pulse, τ_x
2 µs – 250 s
• Duty-cycle, D.C. 0 – 1 at f_xmax ≤ 500 kHz
• Duty-off factor, Q 10^-8 – 8^.10⁶ at f_xmax ≤ 500 kHz
• Frequency difference, f_x1 – f_x2 with sign recognition,
0 – 7.5 MHz
• Period difference, T_x1 – T_x2 with sign recognition,
0 – 20 s
• Frequency ratio, f_x1/f_x2 7 ^.10^-9 – 1.4 ^. 10⁸
• Period ratio, T_x1/T_x2 7.5 ^. 10^-9 – 1.33 ^. 10⁸
• Rotation speed, n_x = (f_x ^. 60)/Z, where Z is the
number of encoder teeth
• Pulse width, t_p 2 µs – 250 s
• Space interval, t_s 2 µs – 250 s
• Pulse number (events) counting, N_x 0 – 4^.10⁹
NOTE: The UFDC-1M-16 can also work with any
voltage and current output sensors. It this case, any
voltage–to-frequency converter (VFC) can be used.
The accuracy of such system will be determined by
sensor accuracy as well as by VFC accuracy.
ACCURACY
The UFDC-1M-16 has programmable relative error
from 1 to 0.001 % in all specified range of frequencies
for frequency and period measurements. This error is
constant and does not depend on the measuring
frequencies in all frequency ranges. The UFDC-1M-16
has non-redundant conversion time. The higher
conversion accuracy needs longer conversion time.
However, it is non-redundant for any selected
accuracy and frequency. For time interval, phase shift,
pulse width and space measurements the relative error
is determined mainly by measurand and can be
calculated according to the following equation:
δ_q
=
1
16 ⋅10⁶
⋅t_x
×100%,
where tx is the appropriate measuring value of tp, ts or
τx depending on the mode.
COMMUNICATION MODES
The UFDC-1M-16 can work as an independent
measuring unit (master mode), controlled by any
external microcontroller (or embedded into a sensor),
DAQ board or PC (slave mode). In the master mode,
the conversion accuracy and measurement mode
should be selected by external switches. In this mode
the UFDC-1M-16 works only through the RS232
interface in a unidirectional mode. In the slave mode
(with an external microcontroller), all measuring modes
and programmed accuracy can be set up by a data
bus or through communication I/O ports of master
microcontroller. This allows us use the UFDC-1M-16
as a simple peripheral circuit for a microcontroller. A
bidirectional data exchange is possible with any of
three interfaces RS232, SPI or I²C. The UFDC-1M-16
works as a standard element in different systems with
I²C bus architecture, or can be controlled through the
RS232 or SPI interfaces. The choice of interface can
be performed automatically depend on the circuit
connections.
CHARACTERISTICS
• Single power supply, V: 4.5 – 5.5
• External reference frequency, MHz: 16
• Internal reference frequency, MHz: 16
• Conversion time, from 6.25 µs to 6.25 ms
• Supply current (at 16 MHz, 4.5V, 25ºC), mA: 17.5
• Operating temperature range -40ºC to +85ºC
• Storage temperature range -65°C to +150°C
PIN-OUT AND HOUSING
The UFDC-1M-16 is available in a 28-lead (0.300"/
7.62 mm Wide) Plastic Dual Inline Package (PDIP);
32-lead 7 x 7 mm Body Size, 1.0 mm Body Thickness,
0.8 mm Lead Pitch small Thin Profile Plastic Quad Flat
Package (TQFP); and 32-pad, 5 x 5 x 1.0 mm Body,
Lead Pitch 0.50 mm, 3.10 mm Exposed Pad, Micro
Lead Frame Package (MLF).
PIN FUNCTION DESCRIPTIONS
RXD
TXD
FX1
FX2
ST1
VCC
GND
OS1
OS2
ST2
N2
N3
N0
SCL
SDA
M3
A2 (M2)
A1 (M1)
A0 (M0)
GND
VCC
SCK
MISO
M__OSI
SS/TEST
N1
TQFP/MLF TOP VIEW
2