Rainbow Electronics MAX188 - Manual (Page 4)

MAX186/MAX188
Low-Power, 8-Channel,
Serial 12-Bit ADCs
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ELECTRICAL CHARACTERISTICS (continued)
(V DD = 5V ±5%; V SS = 0V or -5V; f CLK = 2.0MHz, external clock (50% duty cycle); 15 clocks/conversion cycle (133ksps); MAX186—
4.7µF capacitor at VREF pin; MAX188—external reference, VREF = 4.096V applied to VREF pin; T A = T MIN to T MAX , unless otherwise
noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX
Internal compensation mode 0
µF Capacitive Bypass at VREF
External compensation mode 4.7
MAX186 1.678
V/V
MAX188 1.638
MAX186 ±50
µA REFADJ Input Current
MAX188 ±5
V INH 2.4 V
V
INL
0.8 V
DIN, SCLK, CS Input Hysteresis V HYST 0.15 V
DIN, SCLK, CS Input Leakage I IN V IN = 0V or V DD ±1 µA
C IN (Note 6) 15 pF
SHDN Input High Voltage V INH V DD - 0.5 V
SHDN Input Low Voltage V INL 0.5 V
SHDN Input Current, High I
INH
SHDN = V
DD
4.0 µA
SHDN Input Current, Low I
INL
SHDN = 0V -4.0 µA
SHDN Input Mid Voltage V IM V
SHDN Voltage, Floating V FLT
SHDN = open 2.75 V
SHDN = open -100 100 nA
I SINK = 5mA 0.4
Output Voltage Low V OL
I SINK = 16mA 0.3
V
Output Voltage High V OH I SOURCE = 1mA 4 V
Three-State Leakage Current I
L
CS = 5V ±10 µA
Three-State Output Capacitance C
OUT
CS = 5V (Note 6) 15 pF
Positive Supply Voltage V DD 5 ±5% V
DIN, SCLK, CS Input Capacitance
SHDN Max Allowed Leakage,
Mid Input
Negative Supply Voltage V SS
0 or
-5 ±5%
V
Operating mode 1.5 2.5
Fast power-down 30 70 Positive Supply Current I DD
Full power-down 2 10
Operating mode and fast power-down 50
Negative Supply Current I SS
Full power-down 10
µA
mA
µA
DIN, SCLK, CS Input Low Voltage
DIN, SCLK, CS Input High Voltage
1.5 V DD -1.5
DIGITAL INPUTS (DIN, SCLK, CS , SHDN )
DIGITAL OUTPUTS (DOUT, SSTRB)
POWER REQUIREMENTS
UNITS
EXTERNAL REFERENCE AT REFADJ
Reference-Buffer Gain