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TCM4400EPET Datasheet(PDF) 9 Page - Texas Instruments |
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TCM4400EPET Datasheet(HTML) 9 Page - Texas Instruments |
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9 / 64 page  TCM4400E GSM/DCS BASEBAND AND VOICE A/D AND D/A RF INTERFACE CIRCUIT SLWS082A – JULY 1999 – REVISED MARCH 2000 9 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) (continued) dc accuracy – baseband uplink path PARAMETER MIN TYP MAX UNIT Offset error before calibration ±100 mV Offset error after calibration† –7 0 7 mV † Calibration must be performed in normal operation mode. dynamic parameters – baseband uplink path PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Absolute gain error relative to VVREF Measured with 67.7 kHz sinewave –1.5 0 1.5 dB 100 kHz –3 dB 200 kHz –34 dB Maximum output random modulation spectrum relative to in-band average level Measured by average FFTs of random bursts using 250 kHz –37 dB average level. Measured by average FFTs of random bursts using a window with 30 kHz bandwidth. 400 kHz –65 dB a window with 30 kHz bandwidth. 600 KHz –72 dB 800 KHz –72 dB smoothing filters characteristics – baseband uplink path PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Group delay 0 Hz to 100 kHz 1.5 µs I and Q channels gain matching – baseband uplink path PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Gain matching between channels 0 Hz to 96 kHz Measured on 67.7 kHZ sinewave –1 0 1 dB –0.42 –0.27 –0.12 I and Q gain unbalance Programmable with bits IQSEL, G1, and G0 –0.68 –0.53 –0.38 dB –0.93 –0.78 –0.63 baseband uplink path global characteristics PARAMETER MIN TYP MAX UNIT GMSK phase trajector error‡ 6 ° peak GMSK phase trajectory error‡ 1.5 ° rms Power supply rejection 55 dB ‡ After software calibration through BBAloop timing requirements of baseband uplink path programmable delays – baseband uplink path (see Figure 1) MIN NOM MAX UNIT§ tsu1 Setup time, BENA before APC ↑ Bits DELU of register BULRUDEL 0 15 1/4-bit th1 Hold time, ramp-down from BENA low Bits DELD of register BULRUDEL 0 15 1/4-bit ttf Transition time APC Bit APCSPD = 0 0 64 1/16-bit tr, tf Transition time, APC Bit APCSPD = 1 0 64 1/8-bit § Bit is relative to GSM bit = 1/270 kHz. Units can be a fractional part of the GSM bit as noted. Values in the above table are given for system information only. |
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