AD7870 Analog Devices, AD7870 Datasheet - Page 3

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

REV. B
Parameter
DC ACCURACY
DYNAMIC PERFORMANCE
ANALOG INPUT
REFERENCE OUTPUT
LOGIC INPUTS
LOGIC OUTPUTS
CONVERSION TIME
POWER REQUIREMENTS
NOTES
1
2
3
4
5
Specifications subject to change without notice.
Temperature ranges are as follows: AD7875: K, L Versions, 0 C to +70 C; B, C Versions, –40 C to +85 C; T Version, –55 C to +125 C. AD7876: B, C Versions,
Includes internal reference error and is calculated after unipolar offset error (AD7875) or bipolar zero error (AD7876) has been adjusted out.
Dynamic performance parameters are not tested on the AD7876 but these are typically the same as for the AD7875.
SNR calculation includes distortion and noise components.
Sample tested @ +25 C to ensure compliance.
–40 C to +85 C; T Version, –55 C to +125 C.
Full-scale error refers to both positive and negative full-scale error for the AD7876.
Resolution
Minimum Resolution for Which
Integral Nonlinearity @ +25 C
Differential Nonlinearity
Unipolar Offset Error (AD7875 Only)
Bipolar Zero Error (AD7876 Only)
Full-Scale Error at +25 C
Full-Scale TC
Track/Hold Acquisition Time
Signal-to-Noise Ratio
Total Harmonic Distortion (THD)
Peak Harmonic or Spurious Noise
Intermodulation Distortion (IMD)
Second Order Terms
Third Order Terms
AD7875 Input Voltage Range
AD7875 Input Current
AD7876 Input Voltage Range
AD7876 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
No Missing Codes Are Guaranteed
T
T
@ +25 C
T
Floating-State Leakage Current
Floating-State Output Capacitance
MIN
MIN
MIN
to T
to T
to T
MAX
MAX
MAX
2
IN
CLK
(AD7875 Only)
(AD7876 Only)
= 2.5 MHz)
IN
4
INL
INH
(SNR)
5
OL
OH
2
3
(AD7875 ONLY)
5
K, B
12
12
2
70
70
–80
–80
–80
–80
0 to +5 0 to +5 0 to +5
500
2.99
3.01
–1
2.4
0.8
10
4.0
0.4
10
15
8
7/9
As per AD7870
1
1
1
1
5
6
8
60
10
600
60
10
10
AD7875/AD7876
1
L, C
12
12
2
72
71
–80
–80
–80
–80
500
2.99
3.01
–1
2.4
0.8
10
4.0
0.4
10
15
8
7/9
1/2
1
1/2
1
5
2
8
35
10
600
35
10
10
1
T
12
12
2
69
69
–78
–78
–78
–78
500
2.99
3.01
–1
2.4
0.8
10
4.0
0.4
10
15
8
7/9
1
1
1
1.5/–1.0
5
6
8
60
10
600
60
10
10
1
–3–
Units
Bits
Bits
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
ppm/ C max
dB min
dB min
dB max
dB max
dB max
dB max
Volts
Volts
V min
V max
ppm/ C max
mV max
V min
V max
pF max
V min
V max
pF max
s max
A max
A max
A max
A max
A max
s max
s min/ s max
Test Conditions/Comments
Typical Full-Scale Error Is 1 LSB
Typical TC is 20 ppm/ C
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
Typical Tempco Is 20 ppm/ C
Reference Load Current Change (0 A–500 A)
Reference Load Should Not Be Changed
During Conversion.
V
V
V
V
I
I
SOURCE
SINK
IN
IN
IN
DD
DD
IN
IN
= 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
AD7870/AD7875/AD7876
to V
5%
5%
DD
DD
SAMPLE
= 100 kHz
SAMPLE
SAMPLE
SAMPLE
SAMPLE
IN
IN
IN
< 50 kHz
< 50 kHz
< 50 kHz
= 100 kHz
= 100 kHz
= 50 kHz
= 50 kHz