MNADC0802L-X REV 0A0 MILITARY DATA SHEET
Electrical Characteristics
AC PARAMETERS
(The following conditions apply to all the following parameters, unless otherwise specified.)
AC: Vcc = 5V, fCLK = 640KHz.
SYMBOL PARAMETER CONDITIONS NOTES PIN-
NAME MIN MAX UNIT SUB-
GROUPS
Tc Conversion Time
at fCLK = 640KHz fCLK = 640KHz 7 103 114 uS 9
7 95 122 uS 10, 11
Tc Conversion Time (640KHZ) (CNVTIM in seconds) 6, 7 66 73 1/
fCLK 9
6, 7 61781/
fCLK 10, 11
fCLK Clock Frequency 1, 6 1460 KHz 4
1, 6 100 KHz 4
fCLK Clock Duty Cycle 1, 6 40 % 4
1, 6 60 % 4
Conversion Rate
in Free-Running
Mode
INTR tied to WR with CS = 0V,
fCLK = 640KHZ 8770 9708 Conv/
S9
TW(WR)L Width of WR Input
(Start pulse
width)
CS = 0V 1, 8 100 nS 9
tACC Access Time
(Delay from
falling Edge of
RD to Output Data
Vaild)
CL = 100pF 1 0 200 nS 9
TRI-STATE
Control(Delay
from Rising Edge
of RD to HI-Z
State)
RL = 2K Ohms, CL = 100pF 1 0 200 nS 9
Delay from
Falling Edge of
WR or RD to Reset
of INTR
1 450 nS 9
Note 1: Functional test (go-no-go)
Note 2: The Vref/2 pin is the center point of a two resistor divider connected from Vcc to
Gnd, each resistor is 16K. Total ladder input resistance is the sum of these two
equal resistors.
Note 3: For Vin(-) > Vin(+) the digital output code will be 0000,0000. Two on-chip diodes are
tied to each analog input which will forward conduct for analog input voltage one
diode drop below Gnd or one diode drop greater than the Vcc supply. Be careful during
testing at low Vcc levels (4.5V), as high level analog inputs "5V" can cause this
input diode to conduct, especially at elevated temperatures, and cause errors for
analog inputs near full scale. The spec allows 50mV forward bias of either diode.
This means that as long as the analog Vin does not exceed the supply voltage by more
than 50mV, the output code will be correct. To achieve an absolute 0 to 5 Vdc input
voltage range will therefore require a minimum supply voltage of 4.95Vdc over
temperature variations, initial tolerance and loading.
Note 4: Iin(1) and Iin(0) are tested at four pins: CS, RD, WR, CLK.
Note 5: BXVO, BXV1L, BXV1H, BXTRIL, BXTRIH, BXSRC, BXSNK test from bits 0 to 7 (X = 0 to 7).
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