ADMC300-PB Analog Devices, ADMC300-PB Datasheet - Page 4

• Manufacturer Part Number: ADMC300-PB
• Description: High Performance DSP-Based Motor Controller
• Manufacturer: Analog Devices

ENCODER INTERFACE UNIT
Parameter
f
NOTES
1
Specifications subject to change without notice.
AUXILIARY PWM OUTPUTS
Parameter
f
Specifications subject to change without notice.
TIMING PARAMETERS
Parameter
Clock Signals
t
to half the instruction rate; a 12.5 MHz input clock (which is equivalent to 80 ns)
yields a 40 ns processor cycle (equivalent to 25 MHz). t
0.5 t
specification value.
Example: t
Timing Requirements:
t
t
t
Switching Characteristics:
t
t
t
Control Signals
Timing Requirement:
t
PWM Shutdown Signals
Timing Requirements:
t
t
NOTES
1
Specifications subject to change without notice.
ADMC300–SPECIFICATIONS
Applies after power-up sequence is complete. Internal phase lock loop requires no more than 2000 CLKIN cycles assuming stable CLKIN (not including crystal
ENC, MAX
Assumes perfect quadrature encoder signals.
AUXPWM
CK
CKI
CKIL
CKIH
CKL
CKH
CKOH
RSP
PWMTPW
PIOPWM
oscillator start-up time).
is defined as 0.5 t
CKI
period should be substituted for all relevant timing parameters to obtain
CKH
= 0.5 t
CLKIN Period
CLKIN Width Low
CLKIN Width High
CLKOUT Width Low
CLKOUT Width High
CLKIN High to CLKOUT High
RESET Width Low
PWMTRIP Width Low
PIO Width Low
Maximum Encoder Pulse Rate
Resolution
Switching Frequency
CKI
CK
. The ADMC300 uses an input clock with a frequency equal
– 10 ns = 0.5 (40 ns) – 10 ns = 10 ns.
CLKOUT
CLKIN
(V
otherwise noted)
(V
otherwise noted)
DD
DD
= AV
1
= AV
DD
DD
= 5 V
= 5 V
CK
values within the range of
t
10%, GND = AGND = 0 V, T
CKIL
10%, GND = AGND = 0 V, T
Test Conditions
Test Conditions
t
CKL
t
CKI
t
t
CKOH
CKH
t
CKIH
AMB
AMB
= –40 C to +85 C, CLKIN = 12.5 MHz, unless
= –40 C to +85 C, CLKIN = 12.5 MHz, unless
Min
80
20
20
0.5 t
0.5 t
0
5 t
3 t
3 t
Min
Min
CK
CK
CK
CK
CK
1
– 10
– 10
Typ
Typ
8
48.8
Max
150
20
Max
3.1
Max
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
Unit
MHz
Unit
Bits
kHz