DS1870 Datasheet, PDF (3/28 Pages) Maxim Integrated Products – LDMOS RF Power-Amplifier Bias Controller

LDMOS RF Power-Amplifier Bias
Controller
ANALOG VOLTAGE-MONITORING CHARACTERISTICS
(V_CC = +4.5 to 5.5V, T_A = -40°C to +95°C.)
PARAMETER
V_D Monitor Factory-
Calibrated FS
V_CC Monitor Factory-
Calibrated FS
I_D1 and I_D2 Monitor Factory-
Calibrated FS
Resolution
(V_CC, V_D, I_D1, I_D2)
Accuracy
(V_CC, V_D, I_D1, I_D2)
Update Rate for
V_CC, V_D, I_D1, I_D2
SYMBOL
CONDITIONS
Code FFF8h
Code FFF8h
Code FFF8h
t_frame
MIN
2.488
TYP
2.500
MAX
2.513
UNITS
V
6.521 6.553 6.587
V
0.4975 0.5000 0.5025
V
0.0122
%FS
0.25
0.5
%FS
50
ms
DIGITAL THERMOMETER CHARACTERISTICS
(V_CC = +4.5 to 5.5V, T_A = -40°C to +95°C.)
PARAMETER
Thermometer Error
Update Rate
SYMBOL
T_ERR
t_frame
CONDITIONS
-40°C to 95°C
MIN TYP MAX UNITS
-3
+3
°C
50
ms
ANALOG POTENTIOMETER CHARACTERISTICS
(V_CC = +4.5 to 5.5V, T_A = -40°C to +95°C.)
PARAMETER
Wiper Resistance
Potentiometer
End-to-End Resistance
Resolution
Absolute Linearity
Relative Linearity
Ratiometric Temperature
Coefficient
End-to-End Temperature
Coefficient
-3dB Cutoff Frequency
Series Resistors from L1, L2 to
GND
V_HCOM/V_LX
SYMBOL
+25°C
R_POT +25°C
(Note 3)
(Note 4)
(Note 5)
R_S
+25°C
CONDITIONS
MIN TYP MAX UNITS
500 1000
Ω
10.0
13
16.8
kΩ
0.4
%FS
-1
+1
LSB
-0.5
+0.5 LSB
5
ppm/°C
70
ppm/°C
1
MHz
15.1 19.5 25.2
kΩ
0.5975 0.6 0.6025
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