ELECTRICAL CHARACTERISTICS (Cont.)
At TA = –40°C to +85°C, fS = 100kHz, and VDIG = VANA = +5V, using internal reference, unless otherwise specified.
ADS7804P, U
ADS7804PB, UB
TYP
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
MAX
UNITS
REFERENCE
Internal Reference Voltage
Internal Reference Source Current
(Must use external buffer.)
Internal Reference Drift
2.48
2.5
1
2.52
ꢀ
ꢀ
ꢀ
ꢀ
V
µA
8
ppm/°C
External Reference Voltage Range
for Specified Linearity
External Reference Current Drain
2.3
2.5
2.7
ꢀ
ꢀ
ꢀ
ꢀ
V
Ext. 2.5000V Ref
100
µA
DIGITAL INPUTS
Logic Levels
VIL
VIH
IIL
–0.3
+2.0
+0.8
VD +0.3V
±10
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
V
V
µA
µA
IIH
±10
DIGITAL OUTPUTS
Data Format
Data Coding
VOL
Parallel 12 Bits
Binary Two’s Complement
ISINK = 1.6mA
ISOURCE = 500µA
High-Z State,
+0.4
ꢀ
ꢀ
V
V
µA
VOH
+4
ꢀ
Leakage Current
±5
VOUT = 0V to VDIG
Output Capacitance
High-Z State
15
15
pF
DIGITAL TIMING
Bus Access Time
Bus Relinquish Time
83
83
ꢀ
ꢀ
ns
ns
POWER SUPPLIES
Specified Performance
VDIG
Must be ≤ VANA
+4.75
+4.75
+5
+5
0.3
16
+5.25
+5.25
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
V
V
mA
mA
VANA
+IDIG
+IANA
Power Dissipation
fS = 100kHz
100
ꢀ
mW
TEMPERATURE RANGE
Specified Performance
Derated Performance
Storage
–40
–55
–65
+85
+125
+150
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
°C
°C
°C
Thermal Resistance (θJA
)
Plastic DIP
SO
75
75
ꢀ
ꢀ
°C/W
°C/W
NOTES: (1) LSB means Least Significant Bit. For the 12-bit, ±10V input ADS7804, one LSB is 4.88mV. (2) Typical rms noise at worst case transitions and
temperatures. (3) As measured with fixed resistors shown in 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 x FS input overvoltage.
ADS7804
SBAS019A
3
www.ti.com
BB [ BURR-BROWN CORPORATION ]
