U2790B-MFP ATMEL | Alldatasheet

Document overview

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Technical content

Features

  • Supply Voltage 5 V (Typically)
  • Very Low Power Consumption: 150 mW (Typically) for -1 dBm Output Level
  • Very Good Sideband Suppression by Means of Duty Cycle Regeneration of the LO Input Signal
  • Phase Control Loop for Precise 90° Phase Shifting
  • Power-down Mode
  • Low LO Input Level: -10 dBm (Typically)
  • 50-/g87 Single-ended LO and RF Port
  • LO Frequency from 100 MHz to 1 GHz
  • SO16 Package01/03 Benefits
  • No External Components Required for Phase Shifting
  • Adjustment Free, Hence Saves Manufacturing Time
  • Only Three External Components Necessary, this Results in Cost and Board Space Saving Electrostatic sensitive device. Observe precautions for handling.

Description

The U2790B is a 1000-MHz quadrature modulator using Atmel´s advanced UHF pro- cess. It features a frequency range from 100 MHz up to 1000 MHz, low current consumption, and single-ended RF and LO ports. Adjustment-free application makes the direct converter suitable for all di gital radio systems up to 1000 MHz, e.g., GSM, ADC, JDC. Figure 1. Block Diagram

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Figure 2. Pinning SO16

1 PU Power-up input

10 BB Bi Baseband input B inverse

12 LO i LO input

4583A–CELL–01/03 Absolute Maximum Ratings Parameters Symbol Value Unit Supply voltage V S 6V Input voltage V i 0 to VS V Junction temperature T j 125 /g176C Storage temperature range T Stg -40 to +125 /g176C Operating Range Parameters Symbol Value Unit Supply voltage range V S 4.5 to 5.5 V Ambient temperature range T amb -40 to +85 /g176C Thermal Resistance Parameters Symbol Value Unit Junction ambient SO16 R thJA 110 K/W

Electrical Characteristics

Test conditions (unless otherwise specified): V S = 5 V, Tamb = 25°C, referred to test circuit, system impedance Z O = 50 /g87, fLO = 900 MHz, PLO = -10 dBm, VBBi = 1 Vpp differential. No. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type* 1.1 Supply voltage range 4, 5 V S 4.5 5.5 V A

1.2 Supply current 4, 5 I S 24 30 37 mA A

2 Baseband Inputs

2.1 Input-voltage range

(differential) 7–8, 9–10 VBBi 1000 1500 mV pp D

2.2 Input impedance

(single ended) ZBBi 3.2 k /g87 D

2.3 Input-frequency

range (5) fBBi 02 5 0 M H z D 2.4 Internal bias voltage V BBb 2.35 2.5 2.65 V A

2.5 T emperature

coefficient TCBB 0.1 <1 mV/ /g176CD

3 LO Input

3.1 Frequency range 12 f LOi 50 1000 MHz D

3.2 Input level (1) PLOi - 12 - 10 - 5 dBm D

3.3 Input impedance Z iLO 50 /g87 D

*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter Notes: 1. The required LO level is a function of the LO frequency. 2. In reference to an RF output level /g163 -1 dBm and I/Q input level of 400 mVpp differential. 3. Sideband suppression is tested without connection at Pins 15 and 16. For higher requirements a potentiometer can be connected at these pins. 4. For T amb = -30/g176C to +85/g176C and VS = 4.5 to 5.5 V. 5. By low impedance signal source.

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4583A–CELL–01/03

3.4 Voltage standing

wave ratio VSWRLO 1.4 2 D 3.5 Duty cycle range DCR LO 0.4 0.6 D

4 RF Output

4.1 Output level 3 P RFo -5 -1 +2 dBm B

4.2 LO suppression (2) fLO = 900 MHz

fLO = 150 MHz LORFo 35 dB B

4.3 Sideband

suppression (2, 3) fLO = 900 MHz fLO = 150 MHz SBSRFo 35 dB B 4.4 Phase error (4) Pe <1 deg. D 4.5 Amplitude error A e < +0.25 dB D

4.6 Noise floor VBBi = 2 V , VBBi = 3 V

VBBi = VBBi = 2.5 V NFL -132 -144 dBm/Hz D 4.7 VSWR VSWR RF 1.6 2 D 4.8 3rd-order baseband harmonic suppression SBBH 35 45 dB D

4.9 RF harmonic

5 Power-up Mode

5.1 Supply current VPU /g163 0.5 V, VPU = 1 V 4, 5 I PU 10 1µ A D

5.2 Settling time

CSPU = 100 pF , CLO = 100 pF CRFo = 1 nF 6 to 3 t sPU 10 µs D

6 Switching Voltage

6.1 Power-on 1 V PUon 4V D

6.2 Power-up 1 V PUdown 1V D

Electrical Characteristics (Continued) Test conditions (unless otherwise specified): V S = 5 V, Tamb = 25°C, referred to test circuit, system impedance Z O = 50 /g87, fLO = 900 MHz, PLO = -10 dBm, VBBi = 1 Vpp differential. No. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type* *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter Notes: 1. The required LO level is a function of the LO frequency. 2. In reference to an RF output level /g163 -1 dBm and I/Q input level of 400 mVpp differential. 3. Sideband suppression is tested without connection at Pins 15 and 16. For higher requirements a potentiometer can be connected at these pins. 4. For T amb = -30/g176C to +85/g176C and VS = 4.5 to 5.5 V. 5. By low impedance signal source.

Figure 4. Typical GMSK Output Spectrum

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Figure 5. Demo Board Layout Figure 6. OIP3 versus Tamb, LO = 150 MHz, Level -20 dBm

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Figure 10. Typical S11 Frequency Response of the RF Output Figure 11. Typical VSWR Frequency Response of the RF Output

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Figure 14. Typical Supply Current versus Temperature at VS = 5 V Figure 15. Typical Output Power versus LO-Frequency at Tamb = 25°C, Figure 16. Typical required VBBi Input Signal (differential) versus LO Frequency for

12 U2790B

Figure 19. Demo Board Layout ground in the shortest possible way.

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4583A–CELL–01/03

Package Information

Ordering Information

Extended Type Number Package Remarks U2790B-MFP SO16 Tube U2790B-MFPG3 SO16 Taped and reeled technical drawings according to DIN specifications Dimensions in mm 10.0 9.85 8.89 0.4 1.27 1.4 0.25 0.10 5.2 4.8 3.7 3.8 6.15 5.85 0.2 16 9

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