3

LTC1957-1/LTC1957-2

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

SHDN Input Threshold

q

0.35

1.4

V

TXEN, BSEL Input Threshold

q

0.35

1.4

V

SHDN, TXEN, BSEL Input Current

SHDN, TXEN or BSEL = 3.6V

q

10

25

50

µA

PCTL Input Voltage Control Range

q

02

V

PCTL Input Voltage Range

q

2.4

V

PCTL Input Resistance

SHDN = LO, TXEN = LO

q

50

90

140

k

Ω

PCTL Input Filter

350

kHz

Autozero Range

q

400

mV

q

50

µs

RF Input Frequency Range

(Note 6)

q

850

2000

MHz

RF Input Power Range

900MHz (Note 6)

– 26

16

dBm

1800MHz (Note 6)

–24

16

dBm

RF Input Impedance

q

100

200

350

Ω

BSEL Timing

200

ns

200

ns

ELECTRICAL C

C

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.

measured between 1V and 2V.

Note 4: Maximum DAC zero-scale offset voltage that can be applied to

PCTL.

Note 5: This is the time from TXEN rising edge 50% switch point to

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:

BW = 0.35/rise time

Note 9: Measured 1

µs after TXEN = HI.