TCM4400EPET datasheet(8/64 Pages) TI

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TCM4400E

GSM/DCS BASEBAND AND VOICE A/D

AND D/A RF INTERFACE CIRCUIT

SLWS082A – JULY 1999 – REVISED MARCH 2000

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted) (continued)

voltage references

REFERENCE

MIN

TYP

MAX

UNIT

VGAP

Voltage on band gap (used for all other references)

1.16

1.22

1.28

Vdc

Band gap output resistance

200

Ω

Band gap external decoupling capacitance

0.1

µF

Band gap start time ( bit CHGUP=0 )

100

Band gap start time ( bit CHGUP=1)

2.5

VREF

Voltage reference of GMSK internal ADC and DAC : VVREF

1.66

1.75

1.84

Vdc

Voltage reference output resistance

200

Ω

Voltage reference external decoupling capacitance

0.1

µF

Voltage reference start time ( bit CHGUP=0 )

300

Voltage reference start time ( bit CHGUP=1)

VMID

Common-mode reference for baseband uplink: VVMID (Bit SELVMID=0)

–10%

Vdd/2

10%

Vdc

Common-mode reference for baseband uplink: VVMID (Bit SELVMID=1)

1.25

1.35

1.45

Vdc

Load resistance on Vmid output

Ω

MICBIAS

Microphone-driving voltage (Bit MICBIAS=0)

1.80

2.00

2.20

Vdc

Microphone-driving voltage(Bit MICBIAS=1)

2.25

2.5

2.75

Vdc

Microphone-bias current drive capability (Bit MICBIAS= 1)

450

500

µA

Microphone-bias current drive capability (Bit MICBIAS=0 )

350

400

µA

ADCMID

DC bias reference of the auxiliary ADCs

–10%

Vdd/2

10%

Vdc

ADCMID external decoupling capacitance

0.1

µF

IBIAS

Bias current adjust external resistance

100

Ω

master clock input (MCLK)

PARAMETER

MIN

NOM

MAX

UNIT

Master clock signal frequency

MHz

Master clock duty cycle (Sinewave)

40%

60%

Maximum peak-to-peak amplitude

1.3

Vpp

Minimum peak-to-peak amplitude

0.5

Vpp

Common-mode input voltage

VSS +0.5

VDD –0.5

Vdc

Input resistance at 13MHz (MCLK to ground)

4.1

6.5

Ω

Input capacitance at 13 MHz (MCLK to ground)

12.5

baseband uplink path

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

I and Q D/A converters resolution

bit

Dynamic range on each output

Centered on VVMID

VVREF

Vpp

Differential output dynamic range with OUTLEV bit = 0†

BULQP-BULQN or BULIP-BULIN

2x VVREF

Vpp

Differential output dynamic range with OUTLEV bit = 1†

BULQP-BULQN or BULIP-BULIN

8/15 x VVREF

Vpp

Output load resistance, differential

Ω

Output load capacitance, differential

Output common-mode voltage

Programmable by bit SELVMID

VVMID

I & Q output state in power down

Hi-Z

† Initial value after reset and at beginning of each burst are BULIP–BULIN=VREF and BULQP–BULQN=0 corresponding to a phase angle of 0°.

TCM4400EPET Datasheet(PDF) 8 Page - Texas Instruments

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