Rainbow Electronics MAX847 - Manual (Page 4)

MAX847
1-Cell, Step-Up
Two-Way Pager System IC
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(OUT = 3.0V, BATT = 1.2V, NICD = 3.6V, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)
I REG2 = 0 to 24mA, OUT = 3.0V, R OFS = 15k Ω
mV 120 155 190 REG2 Voltage Drop
OUT = 3.0V, I REG1 = 65mA
f = 268.8kHz, C REG1 = 10µF ceramic
CONDITIONS
f = 268.8kHz, C REG1 = 10µF, ceramic,
R OFS = 15k Ω , C OFS = 0.1µF, I REG2 = 15mA
dB 30 40
REG2 Supply Rejection
(Note 15)
f = 268.8kHz, C REG1 = 1µF ceramic dB 40 50 REG3 Supply Rejection (Note 15)
nA -50 -3 50 LBI/RSIN Input Current
I OUT = 1mA mV 30 400 LBO/RSO Output Low
Output = 5.5V nA 1 250 LBO/RSO Output Leakage
Ω
1.5 3.1 REG1 PMOS On-Resistance
dB 15 25 REG1 Supply Rejection (Note 15)
UNITS MIN TYP MAX PARAMETER
10mV overdrive µs 15 50
LBO/RSO Response Time
(Note 15)
V 0.2 1.27 CH0 Threshold Range (Note 15)
Measures NICD V 1.2 5.08 CH1 Threshold Range (Note 15)
Measures BATT V 0.2 1.27 CH2 Threshold Range (Note 15)
mV 10
CH0 Threshold Resolution
(Note 15)
Measures NICD mV 40
CH1 Threshold Resolution
(Note 15)
Measures BATT mV 10
CH2 Threshold Resolution
(Note 15)
mV 7.5 16 30
LBI/RSIN Input Hysteresis
(Note 15)
I REG2 = 0.1mA to 24mA mV 9 REG2 Load Regulation
REG3 Output Voltage I REG3 = 0 to 2mA 0.96 1.0 1.04 V
Falling input V 0.58 0.60 0.63 LBI/RSIN Input Threshold
At thresholds of 200mV, 800mV, and 1270mV %
-2.0 2.0
-15mV +15mV
CH0 Error
At thresholds of 1200mV, 3200mV, and 5080mV %
-3.0 3.0
-60mV +60mV
CH1 Error
3.2 3.3 3.4
I OUT = 1mA, OUT = 4.9V V
3.15 3.45
REG1 Clamp Voltage
T A = +25°C
T A = -40°C to +85°C
At thresholds of 200mV, 800mV, and 1270mV %
-2.0 2.0
-15mV +15mV
CH2 Error
mV 1 2 4 CH0 Input Hysteresis (Note 15)
LINEAR REGULATORS
DATA-ACQUISITION AND VOLTAGE MONITORS
mV 4 8 16 CH1 Input Hysteresis (Note 15)