Datasheet

AFE5805
SBOS421D –MARCH 2008–REVISED MARCH 2010 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
AVDD_5V = 5.0V, AVDD1 = AVDD2 = DVDD = 3.3V, LVDD = 1.8V, single-ended input into LNA, ac-coupled (1.0mF),
V
CNTL
= 1.0V, f
IN
= 5MHz, Clock = 40MSPS, 50% duty cycle, internal reference mode, ISET = 56kΩ, LVDS buffer
setting = 3.5mA, at ambient temperature T
A
= +25°C, unless otherwise noted.
AFE5805
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
DYNAMIC PERFORMANCE (continued)
Second-harmonic distortion HD2 f
IN
= 2MHz; –1dBFS, PGA = 30dB –70 dBFS
f
IN
= 5MHz; –1dBFS, PGA = 30dB –54 –65 dBFS
f
IN
= 5MHz; –6dBFS, PGA = 20dB –61 –69 dBFS
Third-harmonic distortion HD3 f
IN
= 2MHz; –1dBFS, PGA = 30dB –58 dBFS
f
IN
= 5MHz; –1dBFS, PGA = 30dB –51 –59 dBFS
f
IN
= 5MHz; –6dBFS, PGA = 20dB –56 –78 dBFS
f
1
= 4.99MHz at –6dBFS,
Intermodulation distortion IMD3 58.5 dBc
f
2
= 5.01MHz at –32dBFS
Crosstalk f
IN
= 5MHz, –1dBFS, PGA = 30dB –67 dBc
CW—SIGNAL CHANNELS
Input voltage noise (CW) e
n
R
S
= 0Ω, f = 1MHz 1.1 nV/√Hz
Output noise correlation factor Summing of eight channels 0.6 dB
Output transconductance
At V
IN
= 100mV
PP
14 15.6 18 mA/V
(I
OUT
/V
IN
)
Dynamic CW output current,
I
OUTAC
2.9 mA
PP
maximum
Static CW output current (sink) I
OUTDC
0.9 mA
Output common-mode
VCM 2.5 V
voltage
(4)
Output impedance 50 kΩ
Output capacitance 10 pF
INTERNAL REFERENCE VOLTAGES (ADC)
Reference top VREFT 0.5 V
Reference bottom VREFB 2.5 V
VREFT – VREFB 1.95 2 2.05 V
Common-mode voltage
V
CM
1.425 1.5 1.575 V
(internal)
V
CM
output current ±2 mA
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
(5)
2.5 mA
(4) CW outputs require an externally applied bias voltage of +2.5V.
(5) Current drawn by the eight ADC channels from the external reference voltages; sourcing for VREFT, sinking for VREFB.
4 Submit Documentation Feedback Copyright © 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): AFE5805