Datasheet

MX7837/MX7847
Complete, Dual, 12-Bit
Multiplying DACs
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
V
DD
to DGND, AGNDA, AGNDB............................-0.3V to +17V
V
SS
to DGND, AGNDA, AGNDB (Note 1) ..............+0.3V to -17V
V
REFA
, V
REFB
to AGNDA, AGNDB .. (V
SS
- 0.3V) to (V
DD
+ 0.3V)
AGNDA, AGNDB to DGND.........................-0.3V to (V
DD
+ 0.3V)
V
OUTA
, V
OUTB
to AGNDA, AGNDB .....(V
SS
- 0.3V) to (V
DD
+ 0.3V)
R
FBA
, R
FBB
to AGNDA, AGNDB .......(V
SS
- 0.3V) to (V
DD
+ 0.3V)
Digital Inputs to DGND...............................-0.3V to (V
DD
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
Narrow Plastic DIP (derate 13.33mW/°C above +70°C)....1067mW
SO (derate 11.76mW/°C above +70°C).........................941mW
Narrow CERDIP (derate 12.50mW/°C above +70°C) ..1000mW
Operating Temperature Ranges:
MX78_7J_/K_ ........................................................0°C to +70°C
MX78_7A_/B_ .................................................. -40°C to +85°C
MX78_7SQ/TQ ............................................... -55°C to +125°C
Storage Temperature Range............................ -65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°C
ELECTRICAL CHARACTERISTICS
(V
DD
= 11.4V to 16.5V, V
SS
= -11.4V to -16.5V, AGNDA = AGNDB = DGND = 0V, V
REFA
= V
REFB
= +10V, R
L
= 2kΩ, C
L
= 100pF,
V
OUT
connected to R
FB
(MX7837), T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Note 2)
Note 1: If V
SS
is open-circuited with V
DD
and either AGND applied, the V
SS
pin will float positive exceeding the Absolute Maximum Ratings .
If this possibility exists, a Schottky diode connected between V
SS
and GND ensures the maximum ratings will be observed.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
PARAMETER SYMBOL MIN TYP MAX UNITS
±4
±2
Differential Nonlinearity DNL ±1 LSB
Relative Accuracy INL
±1/2
LSB
±3
Zero-Code Offset Error
±5
mV
±5
±2
Resolution N 12 Bits
±1
Loaded with all 0s,
tempco =
±5µV/°C typ
CONDITIONS
MX78_7J/A
T
A
= +25°C
Guaranteed monotonic
MX78_7K/B/T
MX78_7K/B
MX78_7S/T
MX78_7J/A/S
MX78_7K/B/T
MX78_7J/A/S
T
A
= +25°C
MX78_7J/A/S ±7
Gain Error
Loaded with all 1s,
tempco = ±2ppm
of FSR/°C typ
T
A
= T
MIN
to T
MAX
MX78_7K/B/T ±4
LSB
V
REF
Input Resistance 81013kΩ
V
REFA
, V
REFB
Resistance
Matching
±0.5 ±3 %
Input High Voltage 2.4
V
Input Low Voltage 0.8
Input Current Digital inputs at 0V and V
DD
±1 µA
Input Capacitance (Note 4) 8 pF
DC Output Impedance 0.2 Ω
Short-Circuit Current V
OUT
connected to AGND 15 mA
V
INH
T
A
= T
MIN
to T
MAX
V
INL
STATIC PERFORMANCE (Note 3)
REFERENCE INPUTS
DIGITAL INPUTS
ANALOG OUTPUTS