AD7870 Analog Devices, AD7870 Datasheet - Page 2

• Manufacturer Part Number: AD7870
• Description: LC2MOS Complete/ 12-Bit/ 100 kHz/ Sampling ADCs
• Manufacturer: Analog Devices

Parameter
DYNAMIC PERFORMANCE
DC ACCURACY
ANALOG INPUT
REFERENCE OUTPUT
LOGIC INPUTS
LOGIC OUTPUTS
CONVERSION TIME
POWER REQUIREMENTS
NOTES
1
2
3
4
5
Specifications subject to change without notice.
AD7870/AD7875/AD7876–SPECIFICATIONS
A6ND = DGND = 0 V, f
Temperature ranges are as follows: J, K, L Versions; 0 C to +70 C: A, B, C Versions; –25 C to +85 C: S, T Versions; –55 C to +125 C.
V
SNR calculation includes distortion and noise components.
Measured with respect to internal reference and includes bipolar offset error.
Sample tested @ +25 C to ensure compliance.
IN
Signal to Noise Ratio
Total Harmonic Distortion (THD)
Peak Harmonic or Spurious Noise
Intermodulation Distortion (IMD)
Resolution
Minimum Resolution for which
Integral Nonlinearity
Integral Nonlinearity
Differential Nonlinearity
Bipolar Zero Error
Positive Full-Scale Error
Negative Full-Scale Error
Input Voltage Range
Input Current
REF OUT @ +25 C
REF OUT Tempco
Reference Load Sensitivity ( REF OUT/ I)
Input High Voltage, V
Input Low Voltage, V
Input Current, I
Input Current (12/8/CLK Input Only)
Input Capacitance, C
Output High Voltage, V
Output Low Voltage, V
DB11–DB0
External Clock (f
Internal Clock
V
V
I
I
Power Dissipation
DD
SS
DD
SS
(pk-pk) = 3 V.
Floating-State Leakage Current
Floating-State Output Capacitance
@ +25 C
T
Second Order Terms
Third Order Terms
Track/Hold Acquisition Time
No Missing Codes are Guaranteed
MIN
to T
MAX
IN
CLK
CLK
3
= 2.5 MHz)
IN
INL
INH
(SNR)
5
OL
OH
= 2.5 MHz external, unless otherwise stated. All Specifications T
4
4
2
5
J, A
70
70
–80
–80
–80
–80
2
12
2.99
3.01
2.4
0.8
10
4.0
0.4
15
8
+5
–5
13
6
95
12
7/9
1/2
5
5
5
3
500
60
1
10
10
10
l
K, B
70
70
–80
–80
–80
–80
2
12
12
2.99
3.01
2.4
0.8
10
4.0
0.4
15
8
7/9
+5
–5
13
6
95
1/2
1
1
5
5
5
3
500
60
1
10
10
10
l
AD7870
–80
–80
–80
–80
95
L, C
72
71
2
12
12
2.99
3.01
2.4
0.8
10
4.0
0.4
15
8
7/9
+5
–5
13
6
1/4
1/2
1
5
5
5
3
500
35
1
10
10
10
l
S
69
69
–78
–78
–78
–78
2
12
12
2.99
3.01
2.4
0.8
10
4.0
0.4
15
8
7/9
+5
–5
13
6
95
l
1/2
5
5
5
3
500
60
1
10
10
10
–2–
T
69
69
–78
–78
–78
–78
2
12
12
2.99
3.01
2.4
0.8
10
4.0
0.4
15
8
7/9
+5
–5
13
6
95
1/2
1
1
5
5
5
3
500
35
1
10
10
10
l
Units
dB min
dB min
dB max
dB max
dB max
dB max
Bits
LSB typ
LSB max
LSB max
LSB max
LSB max
LSB max
Volts
V min
V max
ppm/ C max
mV max
V min
V max
pF max
V min
V max
pF max
V nom
V nom
mA max
mA max
mW max
Bits
s max
A max
A max
A max
A max
s max
s min/ s max
min
to T
(V
DD
max
= +5 V
Test Conditions/Comments
V
Typically 71.5 dB for 0 < V
V
Typically –86 dB for 0 < V
V
Typically –86 dB for 0 < V
fa = 9 kHz, fb = 9.5 kHz, f
fa = 9 kHz, fb = 9.5 kHz, f
During Conversion.
V
V
V
V
I
I
Typically 8 mA
Typically 4 mA
Typically 60 mW
Reference Load Current Change (0–500 A)
Reference Load Should Not Be Changed
SOURCE
SINK
unless otherwise noted.)
IN
IN
IN
DD
DD
IN
IN
5% for Specified Performance
5% for Specified Performance
= 10 kHz Sine Wave, f
= 10 kHz Sine Wave, f
= 10 kHz, f
= 0 V to V
= V
= 5 V
= 5 V
= 1.6 mA
SS
= 40 A
to V
5%, V
5%
5%
DD
DD
SAMPLE
SS
= –5 V
= 100 kHz
SAMPLE
SAMPLE
IN
IN
SAMPLE
SAMPLE
IN
< 50 kHz
< 50 kHz
< 50 kHz
5%,
= 100 kHz
= 100 kHz
= 50 kHz
= 50 kHz
REV. B