Datasheet

AFE5804
www.ti.com SBOS442C –JUNE 2008–REVISED OCTOBER 2011
ELECTRICAL CHARACTERISTICS (continued)
At AVDD_5V = 5.0V, AVDD1 = AVDD2 = DVDD = 3.3V, LVDD = 1.8V, TGC mode I, single-ended input into LNA, ac-coupled
(1.0μF), V
CNTL
= 1.0V, f
IN
= 5MHz, Clock = 40MSPS, 50% duty cycle, LPF = 12.5MHz, internal reference mode, ISET = 56kΩ,
LVDS buffer setting = 3.5mA, and ambient temperature T
A
= +25°C, unless otherwise noted.
AFE5804
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
EXTERNAL REFERENCE VOLTAGES (ADC)
Reference top VREFT 2.4 2.5 2.6 V
Reference bottom VREFB 0.4 0.5 0.6 V
VREFT – VREFB 1.9 2.1 V
Switching current
(4)
2.5 mA
POWER SUPPLY
SUPPLY VOLTAGES At 40MSPS
AVDD1, AVDD2, DVDD Operating 3.15 3.3 3.47 V
AVDD_5V Operating 4.75 5 5.25 V
LVDD 1.7 1.8 1.9 V
SUPPLY CURRENTS
IAVDD1 (ADC) 99 110 mA
TGC mode I 123 136 mA
IAVDD2 (VCA)
CW mode 63 75 mA
TGC mode I 7 10 mA
IAVDD_5V (VCA)
CW mode 54 61 mA
IDVDD (VCA) 1.5 3.0 mA
ILVDD (ADC) 68 80 mA
All channels, TGC mode I, no signal 896 985 mW
All channels, TGC mode II, no signal 808 898 mW
Power dissipation, total
(5)
All channels, PW mode , no signal 840 925 mW
All channels, CW mode, no signal
(6)
525 575 mW
No clock applied, no signal 528 mW
POWER-DOWN MODES
Power-down dissipation, total Complete power-down mode 52 68 mW
Power-down response time 1.0 μs
Power-up response time PD to valid output (90% level) 50 μs
Power-down dissipation
(7)
Partial power-down mode 95 mW
THERMAL CHARACTERISTICS
Temperature range 0 85 °C
Thermal resistance, T
JA
32 °C/W
Thermal resistance, T
JC
4.2 °C/W
(4) Current drawn by the eight ADC channels from the external reference voltages; sourcing for VREFT, sinking for VREFB.
(5) Programmable power affects on the front-end; ADC power consumption remains constant at about 57mW/channel for 40MSPS.
(6) ADC powered-down during CW mode.
(7) At VCA_PD pin pulled high; see also Power-Down Timing diagram.
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