Instruction Manual

MAX1198
Dual, 8-Bit, 100Msps, 3.3V, Low-Power ADC
with Internal Reference and Parallel Outputs
4 _______________________________________________________________________________________
PARAMETER SYMBOL CONDITIONS MIN T YP MAX UNITS
Differential Reference Output
Voltage Range
∆V
REF
∆V
REF
= V
REFP
- V
REFN
1.024
± 3%
V
Reference Temperature
Coefficient
TC
REF
±100 ppm/°C
BUFFERED EXTERNAL REFERENCE (V
REFIN
= 2.048V)
Positive Reference Output
Voltage
V
REFP
(Note 5) 2.162 V
Negative Reference Output
Voltage
V
REFN
(Note 5) 1.138 V
Common-Mode Level V
COM
(Note 5)
V
D D
/ 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 MΩ
Maximum REFP, COM Source
Current
I
SOURCE
5mA
Maximum REFP, COM Sink
Current
I
SINK
- 250 µA
Maximum REFN Source Current I
SOURCE
250 µA
Maximum REFN Sink Current I
SINK
- 5mA
U N B U F F ER ED EXT ER N A L R EF ER EN C E ( V
RE F IN
= AGN D , r efer ence vol tag e ap p l i ed to RE FP , RE FN , and C OM )
REFP, REFN Input Resistance
R
REFP
,
R
REFN
Measured between REFP, COM, REFN,
and COM
4kΩ
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
D D
/ 2
±5%
V
REFP Input Voltage V
REFP
V
C OM
+
∆V
RE F
/ 2
V
REFN Input Voltage V
REFN
V
C OM
-
∆V
RE F
/ 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
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3.3V, OV
DD
= 2.5V, 0.1µF and 2.2µF capacitors from REFP, REFN, and COM to GND; REFOUT connected to REFIN through a
10kΩ resistor, V
IN
= 2V
P-P
(differential with respect to COM), C
L
= 10pF at digital outputs, f
CLK
= 100MHz, 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.)