ELECTRICAL CHARACTERISTICS (Cont.)
TA = –25°C to +85°C, fS = 100kHz, VDIG = VANA = +5V, using internal reference, unless otherwise specified.
ADS7805P, U
ADS7805PB, UB
TYP
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
MAX
UNITS
REFERENCE
Internal Reference Voltage
Int. Ref. Source Current (must use external buffer)
Internal Reference Drift
2.48
2.5
1
8
2.52
2.48
2.5
1
8
2.52
V
µA
ppm/°C
V
Ext. Ref. Voltage Range for Specified Linearity
2.3
2.5
2.7
2.3
2.5
2.7
External Reference Current Drain
Ext. 2.5000V Ref
100
100
µA
DIGITAL INPUTS
Logic Levels
VIL
VIH
IIL
–0.3
+2.0
+0.8
VD + 0.3V
±10
–0.3
+2.0
+0.8
VD + 0.3V
±10
V
V
µA
µA
IIH
±10
±10
Parallel 16 Bits
Binary Two’s Complement
DIGITAL OUTPUTS
Data Format
Data Coding
VOL
ISINK = 1.6mA
ISOURCE = 500µA
+0.4
+4
+0.4
V
V
VOH
+4
Leakage Current
Output Capacitance
High-Z State, VOUT = 0V to VDIG
High-Z State
±5
15
±5
15
µA
pF
DIGITAL TIMING
Bus Access Time
Bus Relinquish Time
83
83
83
83
ns
ns
POWER SUPPLIES
Specified Performance
VDIG
VANA
IDIG
IANA
Must be ≤ VANA
+4.75
+4.75
+5
+5
0.3
16
+5.25
+5.25
+4.75
+4.75
+5
+5
0.3
16
+5.25
+5.25
V
V
mA
mA
mW
Power Dissipation
fS = 100kHz
100
100
TEMPERATURE RANGE
Specified Performance
Operating Temperature(8)
Derated Performance
Storage
–25
–40
–55
–65
+85
+85
+125
+150
–25
–40
–55
–65
+85
+85
+125
+150
°C
°C
°C
°C
Thermal Resistance (θJA
)
DIP-28
SO-28
75
75
75
75
°C/W
°C/W
NOTES: (1) LSB means Least Significant Bit. For the 16-bit, ±10V input ADS7805, one LSB is 305µV.
(2) Typical rms noise at worst case transitions and temperatures.
(3) As measured with fixed resistors, see Figure 4. Adjustable to zero with external potentiometer.
(4) Full-scale error is the worst case of –Full Scale or +Full Scale untrimmed deviation from ideal first and last code transitions, divided by the
transition voltage (not divided by the full-scale range) and includes the effect of offset error.
(5) All specifications in dB are referred to a full-scale ±10V input.
(6) Full-Power Bandwidth defined as Full-Scale input frequency at which Signal-to-(Noise + Distortion) degrades to 60dB, or 10 bits of accuracy.
(7) Recovers to specified performance after 2 • FS input overvoltage.
(8) Functionality test at –40°C.
ADS7805
SBAS020D
3
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BB [ BURR-BROWN CORPORATION ]
