U2891B

Features:

Low power consumption: 25 mA / 3 V (typical at 8 dBm output level)
2.5 GHz output frequency
Excellent sideband suppression by means of duty cycle regeneration and 90° phase control
Separate power-down mode for modulator and mixer
Low LO input level: 10 dBm (typical)
LO and RF port 50- single-ended


Pinout




Specifications

Parameters	Symbol	Value	Unit
Supply voltage      Pins 8, 20 and 21	VS, VScp	6	V
Input voltage        Pins 2, 3, 4, 5, 9, 11, 12, 22 and 23	Vi	0 to VS	V
Junction temperature	Tj	125	°C
Storage-temperature range	Tstg	40 to +125	°C

Description

The U2891B is a silicon monolithic IC made with TEMIC Semiconductors' advanced UHF process.

The U2891B consists of a 500-MHz I/Q quadrature modulator and a 2.5-GHz mixer. Both parts can be connected via an external filter in order to suppress harmonics and spurious products. The device features 3-V operation, low-current consumption and furthermore two separate power-down functions for modulator and mixer. The RF ports are single-ended and the device can be operated adjustment free. These features and the double-conversion concept of U2891B make U2891B perfectly suited for all digital radio applications from 900 MHz up to 2.5 GHz (e.g., GSM, DCS 1800, JDC, PHP and WLAN).

Electrostatic sensitive U2891B.  Observe precautions for handling.