Datasheet

MAX1196
Dual 8-Bit, 40Msps, 3V, Low-Power ADC with
Internal Reference and Multiplexed Parallel Outputs
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= OV
DD
= 3V, 0.1µF and 2.2µF capacitors from REFP, REFN, and COM to GND; REFOUT connected to REFIN through a 10k
resistor, V
IN
= 2V
P-P
(differential with respect to COM), C
L
= 10pF at digital outputs (Note 5), f
CLK
= 40MHz, T
A
= T
MIN
to T
MAX
,
unless otherwise noted. +25°C guaranteed by production test, <+25°C guaranteed by design and characterization. Typical values
are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
BUFFERED EXTERNAL REFERENCE (V
REFIN
= 2.048V)
Positive Reference Output
Voltage
V
REFP
(Note 5)
2.012
V
Negative Reference Output
Voltage
V
REFN
(Note 5)
0.988
V
Common-Mode Level V
COM
(Note 5)
V
DD
/ 2
±0.1
V
Differential Reference Output
Voltage Range
V
REF
V
REF
= V
REFP
- V
REFN
1.024
±2%
V
REFIN Resistance R
REFIN
>50
M
Maximum REFP, COM Source
Current
I
SOURCE
5mA
Maximum REFP, C OM S i nk C ur r ent I
SINK
-250
µA
Maximum REFN Source Current
I
SOURCE
250
µA
Maximum REFN Sink Current I
SINK
-5 mA
UNBUFFERED EXTERNAL REFERENCE (V
REFIN
= AGND, reference voltage applied to REFP, REFN, and COM)
REFP, REFN Input Resistance
R
REFP
,
R
REFN
Measured between REFP and REFN 4 k
REFP, REFN, COM Input
Capacitance
C
IN
15 pF
Differential Reference Input
Voltage Range
V
REF
V
REF
= V
REFP
- V
REFN
1.024
±10%
V
COM Input Voltage Range V
COM
V
DD
/ 2
±5%
V
REFP Input Voltage V
REFP
V
C OM
+
V
RE F
/ 2
V
REFN Input Voltage V
REFN
V
COM
-
V
REF
/ 2
V
DIGITAL INPUTS (CLK, PD, OE, SLEEP, T/B)
CLK
0.8 ×
V
DD
Input High Threshold V
IH
PD, OE, SLEEP, T/B
0.8 ×
OV
DD
V
CLK
0.2 ×
V
DD
Input Low Threshold V
IL
PD, OE, SLEEP, T/B
0.2 ×
OV
DD
V