MAX1198 Datasheet, PDF (4/22 Pages) Maxim Integrated Products – Dual, 8-Bit, 100Msps, 3.3V, Low-Power ADC with Internal Reference and Parallel Outputs

Dual, 8-Bit, 100Msps, 3.3V, Low-Power ADC
with Internal Reference and Parallel Outputs
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.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Differential Reference Output
Voltage Range
∆V_REF ∆V_REF = V_REFP - V_REFN
1.024
V
±3%
Reference Temperature
Coefficient
TC_REF
BUFFERED EXTERNAL REFERENCE (V_REFIN = 2.048V)
Positive Reference Output
Voltage
V_REFP (Note 5)
±100
2.162
ppm/°C
V
Negative Reference Output
Voltage
V_REFN (Note 5)
1.138
V
Common-Mode Level
V_COM (Note 5)
V_DD / 2
V
±0.1
Differential Reference Output
Voltage Range
REFIN Resistance
Maximum REFP, COM Source
Current
∆V_REF ∆V_REF = V_REFP - V_REFN
R_REFIN
I_SOURCE
1.024
V
±2%
>50
MΩ
5
mA
Maximum REFP, COM Sink
Current
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, Measured between REFP, COM, REFN,
R_REFN and COM
4
kΩ
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_COM +
∆V_REF / 2
V
REFN Input Voltage
V_REFN
DIGITAL INPUTS (CLK, PD, OE, SLEEP, T/B)
V_COM -
∆V_REF / 2
V
Input High Threshold
CLK
V_IH
PD, OE, SLEEP, T/B
0.8 ×
V_DD
V
0.8 ×
OV_DD
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