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ADS6225 Datasheet, PDF (4/75 Pages) Texas Instruments – DUAL CHANNEL, 12-BIT, 125/105/80/65 MSPS ADC WITH SERIAL LVDS INTERFACE
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ADS6225, ADS6224
ADS6223, ADS6222
SLAS543A – MAY 2007 – REVISED SEPTEMBER 2007
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
SUPPLIES
AVDD Analog supply voltage
LVDD LVDS Buffer supply voltage
ANALOG INPUTS
Differential input voltage range
Input common-mode voltage
Voltage applied on VCM in external reference mode
CLOCK INPUT
ADS6225
Input clock sample rate
ADS6224
ADS6223
ADS6222
Sine wave, ac-coupled
Input clock amplitude differential (VCLKP – VCLKM)
LVPECL, ac-coupled
LVDS, ac-coupled
LVCMOS, ac-coupled
Input clock duty cycle
DIGITAL OUTPUTS
CLOAD
Maximum external load capacitance from each output pin to
DGND
Without internal termination
With internal termination
RLOAD Differential load resistance (external) between the LVDS output pairs
TA
Operating free-air temperature
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MIN NOM MAX UNIT
3.0 3.3 3.6 V
3.0 3.3 3.6 V
2
Vpp
1.5
±0.1
V
1.45 1.50 1.55 V
5
5
5
5
0.4
35%
1.5
±0.8
±0.35
3.3
50%
125
105
MSPS
80
65
Vpp
65%
5
10
100
–40
pF
Ω
85 °C
ELECTRICAL CHARACTERISTICS
Typical values are at 25°C, min and max values are across the full temperature range TMIN = –40°C to TMAX = 85°C, AVDD =
LVDD = 3.3 V, maximum rated sampling frequency, 50% clock duty cycle, –1dBFS differential analog input, internal reference
mode (unless otherwise noted).
PARAMETER
RESOLUTION
ANALOG INPUT
Differential input voltage
range
Differential input
capacitance
Analog input bandwidth
Analog input common mode
current (per input pin of
each ADC)
REFERENCE VOLTAGES
VREFB Internal reference bottom
voltage
VREFT Internal reference top
voltage
ΔVREF
Internal reference error,
(VREFT–VREFB)
VCM
Common mode output
voltage
ADS6225
Fs = 125 MSPS
MIN TYP MAX
12
2.0
7
500
155
1.0
2.0
–15
±2
15
1.5
ADS6224
Fs = 105 MSPS
MIN TYP MAX
12
2.0
7
500
130
1.0
2.0
–15
±2 15
1.5
ADS6223
Fs = 80 MSPS
MIN TYP MAX
12
2.0
7
500
100
1.0
2.0
–15
±2
15
1.5
ADS6222
Fs = 65 MSPS
MIN TYP MAX
12
2.0
7
500
81
1.0
2.0
–15
±2
15
1.5
UNIT
Bits
VPP
pF
MHz
μA
V
V
mV
V
4
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