X9470 Datasheet, PDF (6/25 Pages) Xicor Inc. – RF Power Amplifier (PA) Bias Controller

Preliminary Information
X9470
VBIAS OUTPUT VOLTAGE FOLLOWER
Recommended Operating Conditions: (Vcc, V+ = 4.75 to 5.25V; Vsense+, Vsense- = 26V; T_A = -40°C to +85°C,
unless otherwise noted.)
Symbol
T_S⁽¹⁰⁾
t_SHDN
PSRR
C_L⁽¹⁰⁾
C_IN⁽¹⁰⁾
R_OUT⁽¹⁰⁾
Parameter
Settling Time
Min.
Limits
Typ. Max.
2
Time for SHDN pin (delay) valid
0.1
1.0
Power Supply Rejection Ratio
45 55
Input Voltage Range
1.5
Load Capacitance
Capacitances on Shutdown Pin
Output Impedance
V_CC – 0.5
1
10
3
Units
µs
µs
dB
V
nF
pF
Ω
Test Conditions/Notes
Final value ±1%, R_L = 10kΩ,
1nF, ∆V_BIAS = 20mV
VCC supply V_CC = 4.75 to
5.25V
at 5MHz, 1nF load
D.C. OPERATING CHARACTERISTICS
Recommended Operating Conditions: (Vcc, V+ = 4.75 to 5.25V; Vsense+, Vsense- = 26V; T_A = -40°C to +85°C, unless
otherwise noted.)
Symbol
I_CC1⁽⁹⁾
I_CC2^(9)(10)
I_SB⁽⁹⁾
I_LI
V_IH⁽¹⁰⁾
V_IL⁽¹⁰⁾
C_IN⁽¹⁰⁾
Parameter
V+ Active Current
V_CC Active Current
Standby Supply Current
(V_CC, V+)
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
Min.
-10
V_CC x 0.7
–0.5
Limits
Typ.
1
5
1.5
Max.
3
25
Units
mA
mA
mA
10
µA
V_CC + 0.5 V
V_CC x 0.3 V
10
pF
Test Conditions
CS = V_CC – 0.3V, and SCL
@ max. t_{CYC, SDA =} V_CC –
0.3V, SHDN inactive
CS = V_IL, and SCL inactive
(no clock)_{, SDA =}V_IL, SHDN
active
V_IN = VSS to V_CC
V_CC = 5V, V_IN = VSS,
T_A = 25°C, f = 1MHz
Notes: (1) V_OUT is a high impedance output intended for light loads only.
(2) Gain at V_OUT is set to 20 by default.
(3) Value given is for V_OUT. The V_BIAS output will depend on the V_BIAS potentiometer which is initially loaded with a zero value, then
followed 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 = (V_w(n)(actual) – V_w(n)(expected))
(7) Relative Linearity is a measure of the error in step size between taps = V_W(n+1) – [V_w(n) + Ml]
(8) 1 Ml = Minimum Increment = R_TOT/63 or R_TOT/255.
(9) Typical values are for T_A = 25°C and nominal supply voltage, VCC = 5V
(10) This parameter is not 100% tested.
REV 11.16 3/20/03
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