LTC1957-2EMS Linear Technology, LTC1957-2EMS Datasheet - Page 3

• Manufacturer Part Number: LTC1957-2EMS
• Description: IC RF PWR CONTROLLR DUAL 10-MSOP
• Manufacturer: Linear Technology

Specifications of LTC1957-2EMS

• Rf Type: Cellular, GSM, GPRS, PCS, Wireless Modem, TDMA
• Frequency: 850MHz ~ 2GHz
• Features: Dual Output
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1957-1 and LTC1957-2 are guaranteed to meet
performance specifications from 0 C to 70 C. Specifications over the
– 30 C to 85 C operating temperature range are assured by design,
characterization and correlation with statistical process controls.
Note 3: Slew rate is measured open loop. The slew time at V
measured between 1V and 2V.
Note 4: Maximum DAC zero-scale offset voltage that can be applied to
PCTL.
temperature range, otherwise specifications are at T
PARAMETER
SHDN Input Threshold
TXEN, BSEL Input Threshold
SHDN, TXEN, BSEL Input Current
PCTL Input Voltage Control Range
PCTL Input Voltage Range
PCTL Input Resistance
PCTL Input Filter
Autozero Range
Autozero Settling Time (t
RF Input Frequency Range
RF Input Power Range
RF Input Impedance
BSEL Timing
ELECTRICAL C
S
)
HARA TERISTICS
C
CONDITIONS
V
V
SHDN, TXEN or BSEL = 3.6V
V
V
SHDN = LO, TXEN = LO
V
t
(Note 6)
900MHz (Note 6)
1800MHz (Note 6)
Referenced to V
t
t
S
1
2
IN
IN
IN
IN
IN
, Shutdown to Enable (Autozero), V
, Setup Time Prior to TXEN Asserted High
, Hold Time After TXEN is Asserted Low
= 2.7V to 6V, TXEN = LO
= 2.7V to 6V
= 3V to 6V, R
= 3V, R
= 2.7V, R
LOAD
LOAD
PCA
A
IN
= 400 (Note 7)
= 25 C. V
LOAD
, SHDN = LO, TXEN = LO
= 400 (Note 4)
or V
The
= 400
PCB
is
IN
denotes specifications which apply over the full operating
= 3.6V, SHDN = TXEN = V
Note 5: This is the time from TXEN rising edge 50% switch point to
V
Note 6: Guaranteed by design. This parameter is not production tested.
Note 7: Includes maximum DAC offset voltage and maximum control
voltage.
Note 8: Bandwidth is calculated using the 10% to 90% rise time:
Note 9: Measured 1 s after TXEN = HI.
Note 10: 50% switch point, SHDN HI = V
PCA/B
IN
BW = 0.35/rise time
= 2.7V (Note 10)
= 1V.
LTC1957-1/LTC1957-2
IN
, unless otherwise noted.
MIN
0.35
0.35
850
– 26
–24
100
10
50
0
IN
, TXEN HI = V
TYP
350
200
200
200
25
90
IN
2000
MAX
.
140
400
350
1.4
1.4
2.4
50
50
16
16
2
UNITS
3
MHz
dBm
dBm
kHz
mV
k
ns
ns
V
V
A
V
V
s