AD7845 Analog Devices, AD7845 Datasheet - Page 2

• Manufacturer Part Number: AD7845
• Description: Complete 12-Bit CMOS Multiplying DAC
• Manufacturer: Analog Devices

Specifications of AD7845

• Resolution (bits): 12bit
• Dac Update Rate: 200kSPS
• Dac Settling Time: 5µs
• Max Pos Supply (v): +15.75V
• Single-supply: No
• Dac Type: Voltage Out
• Dac Input Format: Par

V
Parameter
ACCURACY
REFERENCE INPUT
APPLICATION RESISTOR
DIGITAL INPUTS
POWER SUPPLY
AC PERFORMANCE CHARACTERISTICS
These characteristics are included for Design Guidance and are not subject to test.
DYNAMIC PERFORMANCE
OUTPUT CHARACTERISTICS
NOTES
1
2
3
4
5
Specifications subject to change without notice.
AD7845–SPECIFICATIONS
Temperature ranges are as follows: J, K Versions: 0 C to +70 C; A, B Versions: –40 C to +85 C; S, T Versions: –55 C to +125 C.
Guaranteed by design and characterization, not production tested.
The metal lid on the ceramic D-24A package is connected to Pin 12 (DGND).
The device is functional with a power supply of 12 V.
Minimum specified load resistance is 2 k .
OUT
Resolution
Relative Accuracy
Differential Nonlinearity
Zero Code Offset Error
Offset Temperature Coefficient;
Gain Error
Gain Temperature Coefficient;
Input Resistance, Pin 17
RATIO MATCHING
V
V
I
C
V
V
Power Supply Rejection
I
I
Output Voltage Settling Time
Slew Rate
Digital-to-Analog
Multiplying Feedthrough
Unity Gain Small Signal
Full Power Bandwidth
Total Harmonic Distortion
Open Loop Gain
Output Voltage Swing
Output Resistance
Short Circuit Current @ +25 C
Output Noise Voltage
(0.1 Hz to 10 Hz) @ +25 C
IN
DD
SS
IH
IL
DD
SS
IN
at +25 C
T
at +25 C
T
( Offset/ Temperature)
( Gain/ Temperature)
Glitch Impulse
Error
Bandwidth
f = 10 Hz
f = 100 Hz
f = 1 kHz
f = 10 kHz
f = 100 kHz
connected to R
(Input Current)
Gain/ V
Gain/ V
MIN
MIN
(Input High Voltage)
(Input Low Voltage)
Range
(Input Capacitance)
Range
3
to T
to T
DD
SS
MAX
MAX
4
FB
2
. V
2
2
OUT
load = 2 k , 100 pF. All specifications T
5
J Version
12
8
16
0.5
2.4
0.8
7
14.25/15.75
–14.25/–15.75 –14.25/–15.75 –14.25/–15.75 –14.25/–15.75
6
4
5
11
55
5
600
175
–90
85
0.2
11
2
250
100
50
50
50
1
1
1
2
3
5
3
6
6
7
2
1
0.01
0.01
10
K Version
12
8
16
0.5
2.4
0.8
7
14.25/15.75
6
4
5
11
55
5
600
175
–90
85
0.2
11
2
250
100
50
50
50
1/2
3/4
1
1
2
5
2
6
6
7
2
1
0.01
0.01
10
A Version
12
8
16
0.5
2.4
0.8
7
14.25/15.75
6
4
5
11
55
5
600
175
–90
85
0.2
11
2
250
100
50
50
50
1
1
1
2
3
5
3
6
6
7
2
1
0.01
0.01
10
1
(V
DD
= +15 V,
B Version
12
8
16
0.5
2.4
0.8
7
14.25/15.75
6
4
5
11
55
5
600
175
–90
85
0.2
11
2
250
100
50
50
50
MIN
1/2
3/4
1
1
2
5
2
6
6
7
2
1
0.01
0.01
10
to T
–2–
MAX
unless otherwise noted.)
5%, V
S Version
12
8
16
0.5
2.4
0.8
7
14.25/15.75
–14.25/–15.75 –14.25/–15.75
6
4
5
11
55
5
600
175
–90
85
0.2
11
2
250
100
50
50
50
1
1
1
2
4
5
3
6
6
7
2
1
0.01
0.01
10
SS
= –15 V,
T Version
12
8
16
0 5
2.4
0.8
7
14.25/15.75
6
4
5
11
55
5
600
175
–90
85
0.2
11
2
250
100
50
50
50
1/2
3/4
1
1
3
5
2
6
6
7
2
1
0.01
0.01
10
5%, V
REF
Units
Bits
LSB max
LSB max
LSB max
mV max
mV max
LSB max
LSB max
LSB max
LSB max
ppm of FSR/ C R
typ
k min
k max
% max
V min
V max
pF max
V min/V max
V min/V max
% per % max
% per % max
mA max
mA max
V/ s typ
nV–s typ
mV p-p typ
kHz typ
kHz typ
dB typ
dB min
V min
mA typ
nV/ Hz typ
nV/ Hz typ
nV/ Hz typ
nV/ Hz typ
nV/ Hz typ
= +10 V, AGND = DGND = O V,
V/ C typ
A max
s max
V rms typ
typ
Test Conditions/Comments
1 LSB =
All Grades Are Guaranteed
Monotonic over Temperature
DAC Register Loaded with
All 0s.
R
R
R
R
Typical Input Resistance = 12 k
Matching Between R
Digital Inputs at 0 V and V
V
V
V
V
To 0.01% of Full-Scale Range
V
DAC Register Alternately Loaded
with All 0s and All 1s. Typically
2.5 s at 25 C.
V
Measured with V
DAC Register Alternately Loaded
with All 0s and All 1s.
V
DAC Register Loaded with All 0s.
V
with All 1s V
Sine Wave.
V
with All 1s. V
Sine Wave. R
V
V
V
R
R
V
Includes Noise Due to Output
Amplifier and Johnson Noise
of R
FB
C
B
A
FB
DD
SS
OUT
OUT
OUT
OUT
REF
OUT
OUT
REF
OUT
OUT
L
FB
OUT
, V
, V
, V
= 2 k , C
, V
, V
, V
= –15 V
FB
= +15 V
, R
, R
, R
= 10 V, 10 kHz Sine Wave
= 6 V rms, 1 kHz Sine Wave.
OUT
OUT
OUT
Unloaded
Unloaded
Load = 2 k , 100 pF.
Load = 2 k , 100 pF.
= 10 V, R
Shorted to AGND
OUT
OUT
OUT
FB
FB
FB
V
Connected, V
Connected, V
Connected, V
Connected
Connected
Connected. DAC Loaded
Connected. DAC Loaded
Not Connected
Connected,
2
REF
12
REF
L
REF
L
5%.
= 2 k .
= 100 pF
5%, V
= 100 mV p-p
REF
= 20 V p-p
L
= 2.4 mV
= 2 k
= 0 V.
A
, R
REF
REF
REF
REF
B
, R
= –10 V
REV. B
DD
= +5 V
= +2.5 V
= +5 V
C