Datasheet
AD7870/AD7875/AD7876
Rev. C | Page 5 of 28
Parameter
AD7875/AD7876
1
Units Test Conditions/Comments K, B L, C T
ANALOG INPUT
AD7875 Input Voltage Range 0 to +5 0 to +5 0 to +5 V
AD7875 Input Current 500 500 500 μA max
AD7876 Input Voltage Range ±10 ±10 ±10 V
AD7876 Input Current
±600 ±600 ±600 μA max
REFERENCE OUTPUT
REF OUT @ +25°C 2.99 2.99 2.99 V min
3.01 3.01 3.01 V max
REF OUT Tempco ±60 ±35 ±60 ppm/°C max Typical tempco Is ±20 ppm/°C
Reference Load Sensitivity
(ΔREF OUT/ΔI)
−1 −1 −1 mV max
Reference load current change (0 μA to 500 μA).
Reference load should not be changed during
conversion.
LOGIC INPUTS
Input High Voltage, V
INH
2.4 2.4 2.4 V min V
DD
= 5 V ± 5%
Input Low Voltage, V
INL
0.8 0.8 0.8 V max V
DD
= 5 V ± 5%
Input Current, I
IN
±10 ±10 ±10 μA max V
IN
= 0 V to V
DD
Input Current (12/8/CLK Input Only)
±10 ±10 ±10 μA max V
IN
= V
SS
to V
DD
Input Capacitance, C
IN
5
10 10 10 pF max
LOGIC OUTPUTS
Output High Voltage, V
OH
4.0 4.0 4.0 V min I
SOURCE
= 40 mA
Output Low Voltage, V
OL
0.4 0.4 0.4 V max I
SINK
= 1.6 mA
DB11–DB0
Floating-State Leakage Current 10 10 10 μA max
Floating-State Output
Capacitance
5
15 15 15 pF max
CONVERSION TIME
External Clock (f
CLK
= 2.5 MHz) 8 8 8 μs max
Internal Clock 6.5/9 6.5/9 6.5/9
μs min/μs
max
POWER REQUIREMENTS As per AD7870
Refer to the power requirements in Table 1.
1
For the AD7875, the temperature range for the K and L versions is from 0°C to +70°C; for the B and C versions is−40°C to +85°C; and for the T version is −55°C to
+125°C. For the AD7876, the temperature range for the B and C versions is from −40°C to +85°C and for the T version is−55°C to +125°C.
2
Includes internal reference error and is calculated after unipolar offset error (AD7875) or bipolar zero error (AD7876) has been adjusted out. Full-scale error refers to
both positive and negative full-scale error for the AD7876.
3
Dynamic performance parameters are not tested on the AD7876, but these are typically the same as for the AD7875.
4
SNR calculation includes distortion and noise components.
5
Sample tested @ +25°C to ensure compliance.