RFSystem interface

The System block resides on the same PWB with the RF block yet there is no physical connector between them. The electrical interface to the System block is described below.

Technical Documentation 3. RF+System Module KL8

Table 44. AC and DC Characteristics of signals between RF and System blocks

Signal name

From

To

Parameter

Minimum

Typical

Maximum

Unit

Function

VBATT

Battery

PA

Voltage

3.1

3.7

4.8

V

PA supply voltage

Current

3500

mA

VREF_2

CCONT VREF

HAGAR

Voltage

1.478

1.5

1.523

V

Reference voltage for HAGAR

Current

150

uA

VXO

CCONT VR1

VCTCXO

Voltage

2.7

2.8

2.85

V

Supply voltage for VCTCXO, Hagar digital parts.

Current

1.5

mA

VSYN_1

CCONT VR4

Vdd bb, LNA's

Voltage

2.7

2.8

2.85

V

Supply voltage for LNA's and Vdd_bb

Current

80

mA

VSYN_2

CCONT VR3

HAGAR,

Voltage

2.7

2.8

2.85

V

Supply voltage for dividers, LO buffers, prescaler, VCO

Current

50

mA

VCP

CCONT V5V

HAGAR

Voltage

4.8

5.0

5.2

V

Supply voltage for PLL charge pumps

Current

30

mA

VRX

CCONT VR2

HAGAR,

Voltage

2.7

2.8

2.85

V

Supply voltage for LNA2+mixer+DTOS

Current

80

mA

VTX

CCONT VR5, VR7

HAGAR

Voltage

2.7

2.8

2.85

V

Supply voltage for TX modulator, VCO

Current

80

mA

RESET

MADLinda

HAGAR

Logic high "1"

2.0

2.85

V

HAGAR reset, active LOW

Logic low "0"

0

0.5

V

Current

tbd.

uA

Load capacitance

tbd.

pF

SENA1

MADLinda

HAGAR

Logic high "1"

2.0

2.85

V

HAGAR synthesizer interface enable

Logic low "0"

0

0.5

V

Current

tbd.

uA

Load capacitance

tbd.

pF

SDATA

MADLinda

HAGAR

Logic high "1"

2.0

2.85

V

HAGAR synthesizer interface control data

Logic low "0"

0

0.5

V

Load impedance

tbd.

kohm

Load capacitance

tbd.

pF

Data rate

3.25

Mbit/s

SCLK

MADLinda

HAGAR

Logic high "1"

2.0

2.85

V

HAGAR synthesizer interface clock

Logic low "0"

0

0.5

V

Load impedance

tbd.

kohm

Load capacitance

tbd.

pF

Clock rate

3.25

MHz

3. RF+System Module KL8 Technical Documentation

Table 44. AC and DC Characteristics of signals between RF and System blocks (continued)

Signal name

From

To

Parameter

Minimum

Typical

Maximum

Unit

Function

TXP

MADLinda

HAGAR

Logic high "1"

2.0

2.85

V

Transmitter power control enable

Logic low "0"

0

0.5

V

Load Resistance

10

220

kohm

Load Capacitance

20

pF

AFC

COBBA

VCTCXO

Voltage

0.046

2.254

V

Automatic frequency control signal for VCTCXO

Resolution

11

bits

Load resistance (dynamic)

10

kohm

Load resistance (static)

1

Mohm

Noise voltage

500

uVrms

10...10000Hz

Settling time

0.5

ms

RFC

VCTCXO

MADLinda

Frequency

13/26

MHz

High stability clock signal for the logic circuits in the system block

Signal amplitude

0.5

1.0

2.0

Vpp

Load resistance

10

kohm

Load capacitance

10

12

14

pF

RXIP

HAGAR

COBBA

Output level

300

1400

mVpp

Single ended inphase RX signal to baseband

Source impedance

10

kohm

Load resistance

1

Mohm

Load capacitance

8

pF

RXQP

HAGAR

COBBA

Output level

300

1400

mVpp

Single ended quadrature RX signal to baseband

Source impedance

10

kohm

Load resistance

1

Mohm

Load capacitance

8

pF

RXREF

COBBA

HAGAR

Voltage

1.15

1.2

1.25

V

Reference voltage for RX baseband signals

Source impedance

200

ohm

Current

50

uA

Technical Documentation 3. RF+System Module KL8

Table 44. AC and DC Characteristics of signals between RF and System blocks (continued)

Signal name

From

To

Parameter

Minimum

Typical

Maximum

Unit

Function

TXIP/ TXIN

COBBA

HAGAR

Differential voltage swing (x0.75)

1.226

1.32

1.416

Vpp

Differential in-phase TX baseband signal

DC level

1.165

1.2

1.235

V

for the TX I/Q modulator. Note: swing multiplier may change later

Differential offset voltage (corrected)

+/-2.0

mV

Diff. offset voltage temp. dependence

+/-5.0

mV

Source impedance

500

ohm

Load resistance

40

kohm

Load capacitance

10

pF

Resolution

8

bits

TXQP/ TXQN

COBBA

HAGAR

Differential voltage swing (x0.75)

1.226

1.32

1.416

Vpp

Differential quadrature TX baseband

DC level

1.165

1.2

1.235

V

signal for the TX I/Q modulator. Note:

Differential offset voltage (corrected)

+/-2.0

mV

swing multiplier 0.75 may change later

Diff. offset voltage temp. dependence

+/-5.0

mV

Source impedance

500

ohm

Load resistance

40

kohm

Load capacitance

10

pF

Resolution

8

bits

TXC

COBBA

HAGAR

Voltage Min

0.12

0.18

V

Transmitter power

Voltage Max

2.27

2.33

V

control voltage

Vout temperature dependence

+/-50

ppm/ °C

Source impedance active state

200

ohm

Input resistance

10

kohm

Input capacitance

10

pF

Settling time

10

us

Noise level

500

uVrms

0...200 kHz

Resolution

10

bits

3. RF+System Module KL8 Technical Documentation

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