Datasheet 搜索 > DA转换器 > ADI（亚德诺） > AD7948BRSZ 数据手册 > AD7948BRSZ 数据手册 3/16 页
器件3D模型￥ 1.449
AD7948BRSZ 数据手册 - ADI（亚德诺）
制造商:
ADI（亚德诺）
分类:
DA转换器
封装:
SSOP-20
描述:
ANALOG DEVICES AD7948BRSZ 数模转换器, 12 bit, 17 MSPS, 串行, 3V 至 5.5V, 4.5V 至 5.5V, SSOP, 20 引脚
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AD7948BRSZ数据手册
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AD7943/AD7945/AD7948
REV. B
–3–
Parameter A Grades
2
Units Test Conditions/Comments
ACCURACY
Resolution 12 Bits 1 LSB = (V
IOUT1
– V
REF)
/2
12
= 300 µV When
V
IOUT1
= 1.23 V and V
REF
= 0 V
Relative Accuracy ±1 LSB max
Differential Nonlinearity ±0.9 LSB max All Grades Guaranteed Monotonic
over Temperature
Gain Error @ +25°C ±3 LSB max
T
MIN
to T
MAX
±4 LSB max
Gain Temperature Coefficient
3
2 ppm FSR/°C typ
5 ppm FSR/°C max
Output Leakage Current See Terminology Section
I
OUT1
@ +25°C 10 nA max
T
MIN
to T
MAX
100 nA max Typically 20 nA over Temperature
Input Resistance This Varies with DAC Input Code
@ I
OUT2
Pin (AD7943) 6 kΩ min
@ AGND Pin (AD7945, AD7948) 6 kΩ min
DIGITAL INPUTS
V
INH
, Input High Voltage @ V
DD
= +5 V 2.4 V min
V
INH
, Input High Voltage @ V
DD
= +3.3 V 2.1 V min
V
INL
, Input Low Voltage @ V
DD
= +5 V 0.8 V max
V
INL
, Input Low Voltage @ V
DD
= +3.3 V 0.6 V max
I
INH
, Input Current ±1 µA max
C
IN
, Input Capacitance
3
10 pF max
DIGITAL OUTPUT (SRO) For 1 CMOS Load
Output Low Voltage (V
OL
) 0.2 V max
Output High Voltage (V
OH
)V
DD
– 0.2 V min
POWER REQUIREMENTS
V
DD
Range 3.0/5.5 V min/V max
Power Supply Sensitivity
3
∆Gain/∆V
DD
–75 dB typ
I
DD
(AD7943) 5 µA max V
INH
= V
DD
– 0.1 V min, V
INL
= 0.1 V max.
SRO Open Circuit; No STB Signal; Typically
1 µA. Typically 100 µA with 1 MHz STB
Frequency.
I
DD
(AD7945, AD7948) 5 µA max V
INH
= V
DD
– 0.1 V min, V
INL
= 0.1 V max.
Typically 1 µA.
NOTES
1
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
(for example: AD7943AN-B). Figure 16 is an example of Biased Mode Operation.
2
Temperature ranges as follows: A Versions: –40°C to +85°C.
3
Guaranteed by design.
Specifications subject to change without notice.
BIASED MODE
SPECIFICATIONS
1
(AD7943: V
DD
= +3 V to +5.5 V; V
IOUT1
=V
IOUT2
= AGND = 1.23 V; V
REF
= +0 V to 2.45 V; T
A
= T
MIN
to T
MAX
, unless other-
wise noted. AD7945, AD7948: V
DD
= +3 V to +5.5 V; V
IOUT1
= AGND = 1.23 V; V
REF
= +0 V to 2.45 V; T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
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