
19
REV. PrB
6/2001
For current information contact Analog Devices at (800) ANALOGD
ADSP-21mod980N
PRELIMINARY TECHNICAL DATA
I
DD
, Supply Current (Idle)
@ V
DDINT
= 1.9V
t
CK
= 12.5 ns
50
mA
I
DD
, Supply Current (Dynamic)
@ V
DDINT
= 1.9V
t
CK
= 12.5 ns
9
T
AMB
= +25
°
C
200
mA
I
DD
, Supply Current (Powerdown)
10
Lowest power mode
800
μA
C
I
, Input Pin Capacitance
RESET, BR, IS, TFS0, PF[7:4]
@ V
IN
= 2.5 V, f
IN
= 1.0 MHz,
T
AMB
= +25
°
C
8
pF
C
I
, Input Pin Capacitance
IWR
,
IRD, IAL, DR0, RFS0, SCLK0, IAD [15:0]
@ V
IN
= 2.5 V, f
IN
= 1.0 MHz,
T
AMB
= +25
°
C
32
pF
C
I
, Input Pin Capacitance
TFS1, PF[2:0], CLKIN, DR1, RFS1, SCLK1
@ V
IN
= 2.5 V, f
IN
= 1.0 MHz,
T
AMB
= +25
°
C
64
pF
C
O
, Output Pin Capacitance
1, 6, 7, 10, 11
BG, CLKOUT, TFS0, PF[7:4], DT1
@ V
IN
= 2.5 V, f
IN
= 1.0 MHz,
T
AMB
= +25
°
C
8
pF
C
O
, Output Pin Capacitance
1, 6, 7, 9, 10
IAD [15:0]
,
DT0, IACK, RFS0, SCLK0
@ V
IN
= 2.5 V, f
IN
= 1.0 MHz,
T
AMB
= +25
°
C
32
pF
C
O
, Output Pin Capacitance
1, 6, 7, 9, 10
SCLK1, TFS1, PF[2:0], DATA [23:8], A0, RFS1
@ V
IN
= 2.5 V, f
IN
= 1.0 MHz,
T
AMB
= +25
°
C
64
pF
1
Bidirectional pins: RFS0, RFS1, SCLK0, SCLK1, TFS0, TFS1, IAD [15:0], PF[2:0], PF[7:4].
2
Input only pins: RESET, BR, DR0, DR1, IS, IAL,IRD, IWR.
3
Input only pins: CLKIN, RESET, BR, DR0, DR1.
4
Output pins: BG, A0, DT0, DT1, CLKOUT, IACK.
5
Although specified for TTL outputs, all ADSP-21mod980N outputs are CMOS-compatible and will drive to V
DDEXT
and GND, assuming no DC
loads.
6
Guaranteed but not tested.
7
Three-statable pins: DT0, DT1, SCLK0, SCLK1, TFS0, TFS1, RFS0, RSF1, IAD[15:0].
8
0 Volts on BR.
9
Vin = 0V and 3V. For typical supply current figures refer to
“
Power Dissipation
”
section.
10
See the
ADSP-2100 Family User
’
s Manual
for details.
11
Output pin capacitance is the capacitive load for any three-stated output pin
ELECTRICAL CHARACTERISTICS (CONTINUED)
Parameter
Test Conditions
Min
Typ
Max
Unit