WinSystems PCM-A/D-12, Руководство по эксплуатации

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3
®
ADS7806
ELECTROSTATIC
DISCHARGE SENSITIVITY
Electrostatic discharge can cause damage ranging from
performance degradation to complete device failure. Burr-
Brown Corporation recommends that this integrated circuit
be handled and stored using appropriate ESD protection
methods.
DIGITAL TIMING
Bus Access Time
R
L
= 3.3k
Ω
, C
L
= 50pF 83 * ns
Bus Relinquish Time R
L
= 3.3k
Ω
, C
L
= 10pF 83 * ns
POWER SUPPLIES
Specified Performance
V
DIG
Must be
≤
V
ANA
+4.75 +5 +5.25 * * * V
V
ANA
+4.75 +5 +5.25 * * * V
I
DIG
0.6 * mA
I
ANA
5.0 * mA
Power Dissipation V
ANA
= V
DIG
= 5V, f
S
= 40kHz 28 35 * * mW
REFD HIGH 23 * mW
PWRD and REFD HIGH 50 *
µ
W
TEMPERATURE RANGE
Specified Performance
–40 +85 * *
°
C
Derated Performance –55 +125 * *
°
C
Storage –65 +150 * *
°
C
Thermal Resistance (
θ
JA
)
Plastic DIP 75 *
°
C/W
SOIC 75 *
°
C/W
NOTES: (1) LSB means Least Significant Bit. One LSB for the
±
10V input range is 4.88mV. (2) Typical rms noise at worst case transition. (3) As measured with
fixed resistors shown in Figure 7b. 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)
This is the time delay after the ADS7806 is brought out of Power Down Mode until all internal settling occurs and the analog input is acquired to rated accuracy.
A Convert Command after this delay will yield accurate results. (6) All specifications in dB are referred to a full-scale input. (7) Usable Bandwidth defined as Full-
Scale input frequency at which Signal-to-(Noise + Distortion) degrades to 60dB. (8) Recovers to specified performance after 2 x FS input overvoltage.
SPECIFICATIONS
(CONT)
ELECTRICAL
At T
A
= –40
°
C to +85
°
C, f
S
= 40kHz, V
DIG
= V
ANA
= +5V, using internal reference and fixed resistors shown in Figure 7b, unless otherwise specified.
ADS7806P, U ADS7806PB, UB
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Analog Inputs: R1
IN
...........................................................................
±
25V
R2
IN
...........................................................................
±
25V
CAP .................................... V
ANA
+0.3V to AGND2 –0.3V
REF ......................................... Indefinite Short to AGND2,
Momentary Short to V
ANA
Ground Voltage Differences: DGND, AGND1, and AGND2 .............
±
0.3V
V
ANA
....................................................................................................... 7V
V
DIG
to V
ANA
...................................................................................... +0.3V
V
DIG
........................................................................................................ 7V
Digital Inputs .............................................................. –0.3V to V
DIG
+0.3V
Maximum Junction Temperature ................................................... +165
°
C
Internal Power Dissipation ............................................................. 825mW
Lead Temperature (soldering, 10s) ................................................ +300
°
C
ABSOLUTE MAXIMUM RATINGS
MAXIMUM MINIMUM
INTEGRAL SIGNAL-TO- SPECIFICATION
LINEARITY (NOISE + DISTORTION) TEMPERATURE
MODEL ERROR (LSB) RATIO (dB) RANGE PACKAGE
ADS7806P
±
0.9 70 –40
°
C to +85
°
C Plastic DIP
ADS7806PB
±
0.45 72 –40
°
C to +85
°
C Plastic DIP
ADS7806U
±
0.9 70 –40
°
C to +85
°
C SOIC
ADS7806UB
±
0.45 72 –40
°
C to +85
°
C SOIC
ORDERING INFORMATION
PACKAGE INFORMATION
PACKAGE DRAWING
MODEL PACKAGE NUMBER
(1)
ADS7806P Plastic DIP 246
ADS7806PB Plastic DIP 246
ADS7806U SOIC 217
ADS7806UB SOIC 217
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.