Datasheet

MAX191
Low-Power, 12-Bit Sampling ADC
with Internal Reference and Power-Down
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 5V ±5%, V
SS
= 0V or -5V ±5%, f
CLK
= 1.6MHz, 50% duty cycle, AIN- = AGND, BIP = 0V, slow-memory mode, internal-reference
mode, reference compensation mode—external, synchronous operation, Figure 6, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Note 1)
PARAMETER
RD Pulse Width
CONDITIONS
150
UNITS
MAX191C/E
MIN TYP MAX
150 ns
140
0
140
MAX191M
MIN TYP MAX
150
160
0
160
C
L
= 100pF 120 ns
80 100 ns120t
8
110 120100 nst
7
100 12080 nst
6
0 0
CS to RD Hold Time
0 nst
5
SYMBOL
RD to BUSY Delay
CS to RD Setup Time
0 ns
C
L
= 50pF 120 ns
t
4
t
3
t
2
t
1
TIMING CHARACTERISTICS (Figures 6–10)
(V
DD
=5V ±5%, V
SS
= 0V or -5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Note 14)
Aperture Delay
Jitter < 50ps 25 nst
12
2 22
200 200200 nst
10
HBEN to RD Hold Time
0 0 ns0t
9
Data Access Time (Note 15)
Data Setup Time After
BUSY (Note 15)
Bus-Relinquish Time (Note 16)
HBEN to RD Setup Time
Delay Between Read
Operations (Note 6)
200 230 ns260t
13
CLK to BUSY Delay (Note 6)
100 130 ns150t
14
SCLK
OUT
to SSTRB
Rise Delay
SCLK
OUT
to SSTRB
Fall Delay
100 130 ns150t
15
T
A
= +25°C
MIN TYP MAX
µst
11
Delay Between Conversions
V
SS
V-5.25 0Negative Supply Voltage
I
DD
V
DD
V
OL
V
OH
C
OUT
I
L
µA20 50
V0.4I
OUT
= 1.6mA
mA3 5
V4.75 5.25Positive Supply Voltage
Output Low Voltage
SYMBOL
PD = low
PD = high/float
PD = low
LSB±1/2FS change, V
SS
= -5V ±5%Negative Supply Rejection (Note 13)
LSB±1/2FS change, V
DD
= 5V ±5%Positive Supply Rejection (Note 13)
I
SS
µA
V
pF
4.0I
OUT
= -200µAOutput High Voltage
1 20
CS = RD = V
DD
,
AIN = 5V, D0/D8–D7/
DOUT = 0V or V
DD
,
HBEN = PAR = BIP
= 0V or V
DD
Positive Supply Current
15
PD = high/float
Three-State Output
Capacitance (Note 6)
20 100
µA
Negative Supply Current
UNITS
±10D0/D8-D7/DOUT
MIN TYP MAXCONDITIONS
Three-State Leakage Current
PARAMETER
LOGIC OUTPUTS
POWER REQUIREMENTS