參數(shù)資料
型號(hào)： AD7937
廠商： Analog Devices, Inc.
英文描述： LC2MOS 8+4 Loading Dual 12-Bit DAC
中文描述： LC2MOS 8 4載入中雙12位DAC
文件頁(yè)數(shù)： 2/8頁(yè)
文件大?。?/td> 157K
代理商： AD7937
–2–
REV. 0
AD7937–SPECIFICATIONS
(V
DD
= 5 V
10%, V
REFA
= V
REFB
= 10 V; I
OUTA
= AGNDA = 0 V, I
OUTB
= AGNDB = 0 V. All
specifications T
MIN
to T
MAX
unless otherwise noted.)
AC PERFORMANCE CHARACTERISTICS
These characteristics are included for Design Guidance only and are not subject to test.
(V
DD
= 5 V; V
REFA
= V
REFB
= 10 V; I
OUTA
= AGNDA = 0 V, I
OUTB
= AGNDB = 0 V. Output Amplifiers are AD644 except where noted.)
Parameter
Output Current Settling Time
T
A
= 25 C
1
Unit
μ
s max
Test Conditions/Comments
To 0.01% of full-scale range. I
load = 100
, C
= 13 pF. DAC output
measured from falling edge of
WR
. Typical Value of Settling Time is 0.6
μ
s.
Measured with V
= V
= 0 V. I
, I
load = 100
, C
EXT
= 13 pF. DAC
registers alternately loaded with all 0s and all 1s.
Digital-to-Analog Glitch lmpulse
2.5
nV-s typ
AC Feedthrough
V
REFA
to I
OUTA
V
REFB
to I
OUTB
Power Supply Rejection
Gain/
V
DD
Output Capacitance
C
OUTA
C
OUTB
C
OUTA
C
OUTB
Channel-to-Channel Isolation
V
REFA
to I
OUTB
V
REFB
to I
OUTA
Digital Crosstalk
–70
–70
dB max
dB max
V
, V
= 20 V p-p 10 kHz sine wave.
DAC registers loaded with all 0s.
±
0.01
% per % max
V
DD
= V
DD
max – V
DD
min.
70
70
140
140
pF max
pF max
pF max
pF max
DAC A, DAC B loaded with all 0s.
DAC A, DAC B loaded with all 1s.
–84
–84
2.5
dB typ
dB typ
nV-s typ
V
REFA
= 20 V p-p 10 kHz sine wave, V
REFB
= 0 V. Both DACs loaded with all 1s.
V
REFB
= 20 V p-p 10 kHz sine wave, V
REFA
= 0 V. Both DACs loaded with all 1s.
Measured for a Code Transition of all 0s to all 1s. I
OUTA
, I
OUTB
load = 100
,
C
EXT
= 13 pF.
Measured between R
FBA
and I
OUTA
or R
FBB
and I
OUTB
. Frequency of measurement
is 10 Hz–100 kHz.
Output Noise Voltage Density
(10 Hz–100 kHz)
25
nV/
√
Hz
typ
Total Harmonic Distortion
–82
dB typ
V
IN
= 6 V rms, 1 kHz. Both DACs loaded with all 1s.
NOTES
1
Temperature range as follows: A, B Versions: –40
°
C to +85
°
C.
2
Sample tested at 25
°
C to ensure compliance.
Specifications subject to change without notice.
Parameter
ACCURACY
Resolution
Relative Accuracy
Differential Nonlinearity
Gain Error
Gain Temperature Coefficient
2
;
Gain/
Temperature
Output Leakage Current
I
OUTA
A Version
B Version
Unit
Test Conditions/Comments
12
±
1
±
1
±
6
12
±
1/2
±
1
±
3
Bits
LSB max
LSB max
LSB max
All grades guaranteed monotonic over temperature.
Measured using R
FBA
, R
FBB
. Both DAC registers loaded with all 1s.
±
5
±
5
ppm/
°
C max
Typical value is 1 ppm/
°
C.
5
10
5
10
5
10
5
10
nA max
nA max
nA max
nA max
DAC A Register loaded with all 0s.
I
OUTB
DAC B Register loaded with all 0s.
REFERENCE INPUT
Input Resistance
9
20
9
20
k
min
k
max
Typical Input Resistance = 14 k
.
V
REFA
, V
REFB
DIGITAL INPUTS
V
IH
(Input High Voltage)
V
IL
(Input Low Voltage)
I
IN
(Input Current)
+25
°
C
T
to T
C
IN
(Input Capacitance)
2
POWER SUPPLY
V
DD
I
DD
±
3
±
3
% max
Typically
±
0.5%.
2.4
0.8
2.4
0.8
V min
V max
±
1
±
10
10
±
1
±
10
10
μ
A max
μ
A max
pF max
V
IN
= V
DD
.
4.5/5.5
2
0.1
4.5/5.5
2
0.1
V min/V max
mA max
mA typ
相關(guān)PDF資料
PDF描述
AD7937AR LC2MOS 8+4 Loading Dual 12-Bit DAC
AD7937BR LC2MOS 8+4 Loading Dual 12-Bit DAC
AD7938 8-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer
AD7938BCP 8-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer
AD7938BSU 8-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer
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