AD7945 Analog Devices, AD7945 Datasheet - Page 3

• Manufacturer Part Number: AD7945
• Description: +3.3 V/+5 V Multiplying 12-Bit DAC With a Parallel Interface
• Manufacturer: Analog Devices

Specifications of AD7945

• Resolution (bits): 12bit
• Dac Update Rate: 1.7MSPS
• Dac Settling Time: 600ns
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: Par

SPECIFICATIONS
BIASED MODE
wise noted. AD7945, AD7948: V
Parameter
ACCURACY
DIGITAL INPUTS
DIGITAL OUTPUT (SRO)
POWER REQUIREMENTS
NOTES
1
2
3
Specifications subject to change without notice.
REV. B
These specifications apply with the devices biased up at 1.23 V for single supply applications. The model numbering reflects this by means of a “–B” suffix
Temperature ranges as follows: A Versions: –40 C to +85 C.
Guaranteed by design.
(for example: AD7943AN-B). Figure 16 is an example of Biased Mode Operation.
Resolution
Relative Accuracy
Differential Nonlinearity
Gain Error @ +25 C
Gain Temperature Coefficient
Output Leakage Current
Input Resistance
V
V
V
V
I
C
Output Low Voltage (V
Output High Voltage (V
V
Power Supply Sensitivity
I
I
INH
DD
DD
INH
INH
INL
INL
DD
IN
T
I
@ I
@ AGND Pin (AD7945, AD7948)
OUT1
, Input Capacitance
Gain/ V
MIN
, Input Current
(AD7943)
(AD7945, AD7948)
, Input Low Voltage @ V
, Input Low Voltage @ V
@ +25 C
T
, Input High Voltage @ V
, Input High Voltage @ V
Range
OUT2
MIN
to T
to T
Pin (AD7943)
DD
MAX
MAX
(AD7943: V
3
OL
OH
3
)
DD
)
= +3 V to +5.5 V; V
DD
DD
3
DD
DD
1
DD
= +5 V
= +3.3 V
= +3 V to +5.5 V; V
= +5 V
= +3.3 V
A Grades
12
2
5
10
100
6
6
2.4
2.1
0.8
0.6
10
0.2
V
3.0/5.5
–75
5
5
IOUT1
1
0.9
3
4
1
DD
– 0.2
= AGND = 1.23 V; V
IOUT1
= V
2
Units
Bits
LSB max
LSB max
LSB max
LSB max
ppm FSR/ C typ
ppm FSR/ C max
nA max
nA max
k min
k min
V min
V min
V max
V max
pF max
V max
V min
V min/V max
dB typ
IOUT2
A max
A max
A max
–3–
= AGND = 1.23 V; V
REF
= +0 V to 2.45 V; T
Test Conditions/Comments
1 LSB = (V
V
All Grades Guaranteed Monotonic
over Temperature
See Terminology Section
Typically 20 nA over Temperature
This Varies with DAC Input Code
For 1 CMOS Load
V
SRO Open Circuit; No STB Signal; Typically
1 A. Typically 100 A with 1 MHz STB
Frequency.
V
Typically 1 A.
IOUT1
INH
INH
REF
= +0 V to 2.45 V; T
= V
= V
AD7943/AD7945/AD7948
= 1.23 V and V
DD
DD
A
= T
IOUT1
– 0.1 V min, V
– 0.1 V min, V
MIN
to T
– V
MAX
REF)
A
REF
, unless otherwise noted.)
= T
/2
12
= 0 V
MIN
INL
INL
= 300 V When
to T
= 0.1 V max.
= 0.1 V max.
MAX
, unless other-