AD7945 Analog Devices, AD7945 Datasheet - Page 2

• 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

NORMAL MODE
AD7943/AD7945/AD7948–SPECIFICATIONS
AD7945, AD7948: V
Parameter
ACCURACY
REFERENCE INPUT
DIGITAL INPUTS
DIGITAL OUTPUT (AD7943 SRO)
POWER REQUIREMENTS
NOTES
1
2
3
4
Specifications subject to change without notice.
The AD7943, AD7945 and AD7948 are specified in the normal current mode configuration and in the biased current mode for single-supply applications.
Temperature ranges as follows: B Grades: –40 C to +85 C; T Grade: –55 C to +125 C.
The T Grade applies to the AD7945 only.
Guaranteed by design.
Figures 14 and 15 are examples of normal mode operation.
Resolution
Relative Accuracy
Differential Nonlinearity
Gain Error
Gain Temperature Coefficient
Output Leakage Current
Input Resistance
V
V
I
C
Output Low Voltage (V
Output High Voltage (V
V
Power Supply Sensitivity
I
I
INH
DD
DD
INH
INL
DD
IN
T
I
OUT1
, Input Capacitance
Gain/ V
(AD7943)
(AD7945, AD7948)
MIN
, Input Current
, Input Low Voltage
@ +25 C
T
, Input High Voltage
Range
MIN
to T
to T
DD
MAX
MAX
DD
= +4.5 V to +5.5 V; V
(AD7943: V
4
OL
OH
4
)
)
4
DD
= +4.5 V to +5.5 V; V
B Grades
12
2
5
10
100
6
12
2.4
0.8
10
0.2
V
4.5/5.5
–75
5
5
IOUT1
0.5
0.5
2
1
DD
– 0.2
= AGND = 0 V; V
2
T Grade
12
2
5
10
100
6
12
2.4
0.8
10
0.2
V
4.5/5.5
–75
5
5
0.5
0.5
2
1
DD
IOUT1
– 0.2
REF
= V
2, 3
= +10 V; T
IOUT2
–2–
Units
Bits
LSB max
LSB max
LSB max
ppm FSR/ C typ
ppm FSR/ C max
nA max
nA max
k min
k max
V min
V max
pF max
V max
V min
V min/V max
dB typ
A max
A max
A max
= AGND = 0 V; V
A
= T
MIN
to T
REF
MAX
1
, unless otherwise noted.)
= +10 V; T
Test Conditions/Comments
1 LSB = V
All Grades Guaranteed Monotonic over
Temperature
See Terminology Section
Typically 20 nA over Temperature
Typical Input Resistance = 9 k
For 1 CMOS Load
V
SRO Open Circuit. No STB Signal. Typically
1 A. Typically 100 A with a 1 MHz STB
Frequency. At Input Levels of 0.8 V and 2.4 V,
I
V
Typically 1 A. At Input Levels of 0.8 V and
2.4 V, I
DD
INH
INH
Is Typically 2.5 mA.
= V
= V
DD
DD
DD
A
REF
Is Typically 2.5 mA.
= T
– 0.1 V min, V
– 0.1 V min, V
/2
MIN
12
to T
= 2.44 mV when V
MAX
, unless otherwise noted.
INL
INL
= 0.1 V max.
= 0.1 V max.
REF
= 10 V
REV. B