ADS8284
www.ti.com................................................................................................................................................................................................... SLAS628–MARCH 2009
SPECIFICATIONS (continued)
TA = –40°C to 85°C, VCC = 5 V, VEE = –5 V, +VA = 5 V, +VBD = 5 V or 3.3 V, Vref = 4 V, fSAMPLE = 1 MSPS (unless
otherwise noted)
PARAMETER
ADS8284I
TEST CONDITIONS
MIN
TYP
98.3
98.3
97.2
97.2
93.8
95.23
121
121
106
106
101
101
8
MAX
UNIT
VIN = 4 Vpp at 2 kHz
dB
ADS8284IB
ADS8284I
ADS8284IB
ADS8284I
ADS8284IB
ADS8284I
ADS8284IB
ADS8284I
ADS8284IB
ADS8284I
ADS8284IB
Signal-to-noise + distortion
(SINAD)
VIN = 4 Vpp at 10 kHz
dB
dB
dB
dB
VIN = 4 Vpp at 100 kHz,
LoPWR = 0
VIN = 4 Vpp at 2 kHz
VIN = 4 Vpp at 10 kHz
Spurious free dynamic
range (SFDR)
VIN = 4 Vpp at 100 kHz,
LoPWR = 0
dB
–3dB small signal bandwidth
MHz
VOLTAGE REFERENCE INPUT (REFIN)
Reference voltage at REFIN, Vref
Reference input current(6)
INTERNAL REFERENCE OUTPUT (REFOUT)
Internal reference start-up time
Reference voltage range, Vref
Source current
3.0
4.096
1
+VA – 0.8
1
V
µA
From 95% (+VA), with 1-µF storage capacitor
120
4.111
10
ms
V
4.081
4.096
Static load
µA
Line regulation
+VA = 4.75 V to 5.25 V
IO = 0
60
±6
µV
Drift
PPM/°C
BUFFERED REFERENCE OUTPUT (BUF-REF)
Output current
REFIN = 4 V, at 85°C
REFIN = 4 V, at +85°C
70
50
mA
REFERENCE/2 OUTPUT (VCMO)
Output current
µA
ANALOG MULTIPLEXER
Number of channels
4
Channel to channel crosstalk
100 kHz i/p
–95
dB
Auto sequencer with selection of channel count or
manual selection through control lines
Channel selection
DIGITAL INPUT-OUTPUT
ADC CONTROL PINS
Logic Family-CMOS
VIH
IIH = 5 µA
+VBD–1
0.3
+VBD + 0.3
0.8
V
V
V
V
VIL
IIL = 5 µA
Logic level
VOH
IOH = 2 TTL loads
IOL = 2 TTL loads
+VBD–0.6
0
+VBD
0.4
VOL
MULTIPLEXER CONTROL PINS
Logic Family - CMOS
IIH
IIH = 5 µA
IIL = 5 µA
2.3
+VA +0.3
0.8
V
V
Logic level
IIL
–0.3
POWER CONTROL PINS
Logic Family - CMOS
VIH
IIH = 5 µA
IIL = 5 µA
2.3
+VA +0.3
0.8
V
V
Logic level
VIL
–0.3
POWER SUPPLY REQUIREMENTS
(6) Can vary ±20%
Copyright © 2009, Texas Instruments Incorporated
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