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參數資料
| 型號： | AD7948BR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | +3.3 V/+5 V Multiplying 12-Bit DACs |
| 中文描述： | PARALLEL, 8 BITS INPUT LOADING, 0.6 us SETTLING TIME, 12-BIT DAC, PDSO20 |
| 封裝： | SOP-20 |
| 文件頁數： | 2/16頁 |
| 文件大小： | 329K |
| 代理商： | AD7948BR |
REV. B
–2–
AD7943/AD7945/AD7948–SPECIFICATIONS
1
NORMAL MODE
(AD7943: V
DD
= +4.5 V to +5.5 V; V
IOUT1
= V
IOUT2
= AGND = 0 V; V
REF
= +10 V; T
A
= T
MIN
to T
MAX
, unless otherwise noted.
AD7945, AD7948: V
DD
= +4.5 V to +5.5 V; V
IOUT1
= AGND = 0 V; V
REF
= +10 V; T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
Parameter
B Grades
2
T Grade
2, 3
Units
Test Conditions/Comments
ACCURACY
Resolution
Relative Accuracy
Differential Nonlinearity
12
±
0.5
±
0.5
12
±
0.5
±
0.5
Bits
LSB max
LSB max
1 LSB = V
REF
/2
12
= 2.44 mV when V
REF
= 10 V
All Grades Guaranteed Monotonic over
Temperature
Gain Error
T
MIN
to T
MAX
Gain Temperature Coefficient
4
±
2
2
5
±
2
2
5
LSB max
ppm FSR/
°
C typ
ppm FSR/
°
C max
Output Leakage Current
I
OUT1
@ +25
°
C
T
MIN
to T
MAX
10
100
10
100
nA max
nA max
See Terminology Section
Typically 20 nA over Temperature
REFERENCE INPUT
Input Resistance
6
12
6
12
k
min
k
max
Typical Input Resistance = 9 k
DIGITAL INPUTS
V
INH
, Input High Voltage
V
INL
, Input Low Voltage
I
INH
, Input Current
C
IN
, Input Capacitance
4
2.4
0.8
±
1
10
2.4
0.8
±
1
10
V min
V max
μ
A max
pF max
DIGITAL OUTPUT (AD7943 SRO)
Output Low Voltage (V
OL
)
Output High Voltage (V
OH
)
For 1 CMOS Load
0.2
V
DD
– 0.2
0.2
V
DD
– 0.2
V max
V min
POWER REQUIREMENTS
V
DD
Range
Power Supply Sensitivity
4
Gain/
V
DD
I
DD
(AD7943)
4.5/5.5
4.5/5.5
V min/V max
–75
5
–75
5
dB typ
μ
A max
V
INH
= V
DD
– 0.1 V min, V
INL
= 0.1 V max.
SRO Open Circuit. No STB Signal. Typically
1
μ
A. Typically 100
μ
A with a 1 MHz STB
Frequency. At Input Levels of 0.8 V and 2.4 V,
I
DD
Is Typically 2.5 mA.
V
INH
= V
DD
– 0.1 V min, V
INL
= 0.1 V max.
Typically 1
μ
A. At Input Levels of 0.8 V and
2.4 V, I
DD
Is Typically 2.5 mA.
I
DD
(AD7945, AD7948)
5
5
μ
A max
NOTES
1
The AD7943, AD7945 and AD7948 are specified in the normal current mode configuration and in the biased current mode for single-supply applications.
Figures 14 and 15 are examples of normal mode operation.
2
Temperature ranges as follows: B Grades: –40
°
C to +85
°
C; T Grade: –55
°
C to +125
°
C.
3
The T Grade applies to the AD7945 only.
4
Guaranteed by design.
Specifications subject to change without notice.
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