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X9470 Datasheet, PDF (6/24 Pages) Xicor Inc. – RF Power Amplifier (PA) Bias Controller
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X9470
VBIAS OUTPUT VOLTAGE FOLLOWER
Recommended Operating Conditions: (Vcc, V+ = 4.75 to 5.25V; Vsense+, Vsense- = 26V; TA = -40°C to +85°C, unless
otherwise noted.)
Symbol
CL(10)
CIN(10)
ROUT(10)
Parameter
Input Voltage Range
Load Capacitance
Capacitances on Shutdown Pin
Output Impedance
Min.
1.5
Limits
Typ. Max.
VCC - 0.5
1
10
3
Units
V
nF
pF
Ω
Test Conditions/Notes
at 5MHz, 1nF load
D.C. OPERATING CHARACTERISTICS
Recommended Operating Conditions: (Vcc, V+ = 4.75 to 5.25V; Vsense+, Vsense- = 26V; TA = -40°C to +85°C, unless
otherwise noted.)
Limits
Symbol
ICC1(9)
ICC2(9)(10)
Parameter
V+ Active Current
VCC Active Current
ISB(9)
Standby Supply Current
(VCC, V+)
Min.
ILI
VIH(10)
VIL(10)
CIN(10)
CS, SDA, SCL, SHDN RH, RL, RW,
INC/DEC VOUT, Input Leakage
CS, SDA, SCL, SHDN, A0, A1, A2
HIGH Voltage
CS, SDA, SCL, SHDN, A0, A1, A2
LOW Voltage
CS, SDA, SCL, SHDN, A0, A1, A2
Capacitance
-10
VCC x 0.7
-0.5
Typ.
1
5
1.5
10
Max.
3
25
10
Units
mA
mA
mA
µA
Test Conditions
CS = VCC - 0.3V, and SCL
@ max. tCYC, SDA = VCC -
0.3V, SHDN inactive
CS = VIL, and SCL inactive
(no clock), SDA =VIL, SHDN
active
VIN = VSS to VCC
VCC + 0.5 V
VCC x 0.3 V
pF VCC = 5V, VIN = VSS,
TA = 25°C, f = 1MHz
Notes: (1) VOUT is a high impedance output intended for light loads only.
(2) Gain at VOUT is set to 20 by default.
(3) Value given is for VOUT. The VBIAS output will depend on the VBIAS potentiometer which is initially loaded with a zero value, then fol-
lowed by the loading of the final value from E2 memory.
(4) Gain Error excludes the contribution of the input offset voltage error.
(5) Total Error includes the contributions of gain error and input offset voltage error.
(6) Absolute Linearity is utilized to determine actual wiper voltage versus expected voltage = (Vw(n)(actual) - Vw(n)(expected))
(7) Relative Linearity is a measure of the error in step size between taps = VW(n+1) - [Vw(n) + Ml]
(8) 1 Ml = Minimum Increment = RTOT/63 or RTOT/255.
(9) Typical values are for TA = 25°C and nominal supply voltage, VCC = 5V.
(10) This parameter is not 100% tested.
6
FN8204.0
March 8, 2005
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