Datasheet

Parameter A Version
1
B Version
1
S Version
1
Units Test Conditions/Comments
DYNAMIC PERFORMANCE
Signal to Noise + Distortion Ratio
3
70 71 70 dB min Typically SNR is 72 dB
(SNR) V
IN
= 10 kHz Sine Wave, f
SAMPLE
= 200 kHz
(L Version: f
SAMPLE
= 100 kHz @ f
CLKIN
= 2 MHz)
Total Harmonic Distortion (THD) –78 –78 –78 dB max V
IN
= 10 kHz Sine Wave, f
SAMPLE
= 200 kHz
(L Version: f
SAMPLE
= 100 kHz @ f
CLKIN
= 2 MHz)
Peak Harmonic or Spurious Noise –78 –78 –78 dB max V
IN
= 10 kHz Sine Wave, f
SAMPLE
= 200 kHz
(L Version: f
SAMPLE
= 100 kHz @ f
CLKIN
= 2 MHz)
Intermodulation Distortion (IMD)
Second Order Terms –78 –78 –78 dB typ fa = 9.983 kHz, fb = 10.05 kHz, f
SAMPLE
= 200 kHz
(L Version: f
SAMPLE
= 100 kHz @ f
CLKIN
= 2 MHz)
Third Order Terms –78 –78 –78 dB typ fa = 9.983 kHz, fb = 10.05 kHz, f
SAMPLE
= 200 kHz
(L Version: f
SAMPLE
= 100 kHz @ f
CLKIN
= 2 MHz)
DC ACCURACY
Resolution 12 12 12 Bits
Integral Nonlinearity ±1 ±0.5 ±1 LSB max 5 V Reference V
DD
= 5 V
Differential Nonlinearity ±1 ±1 ±1 LSB max Guaranteed No Missed Codes to 12 Bits
Unipolar Offset Error ±3 ±3 ±4 LSB max
±2 ±2 ±2 LSB typ
Unipolar Gain Error ±4 ±4 ±4 LSB max
±2 ±2 ±2 LSB typ
Bipolar Positive Full-Scale Error ± 4 ± 4 ± 5 LSB max
±2 ±2 ±2 LSB typ
Negative Full-Scale Error ±4 ±4 ±5 LSB max
±2 ±2 ±2 LSB typ
Bipolar Zero Error ±4 ±4 ±5 LSB max
ANALOG INPUT
Input Voltage Ranges 0 to V
REF
0 to V
REF
0 to V
REF
Volts i.e., AIN(+) – AIN(–) = 0 to V
REF
, AIN(–) can be
biased up but AIN(+) cannot go below AIN(–).
±V
REF
/2 ±V
REF
/2 ±V
REF
/2 Volts i.e., AIN(+) – AIN(–) = –V
REF
/2 to +V
REF
/2, AIN(–)
should be biased to +V
REF
/2 and AIN(+) can go below
AIN(–) but cannot go below 0 V.
Leakage Current ±1 ±1 ±1 µA max
Input Capacitance 20 20 20 pF typ
REFERENCE INPUT/OUTPUT
REF
IN
Input Voltage Range 2.3/V
DD
2.3/V
DD
2.3/V
DD
V min/max Functional from 1.2 V
Input Impedance 150 150 150 kΩ typ
REF
OUT
Output Voltage 2.3/2.75 2.3/2.7 2.3/2.7 V min/max
REF
OUT
Tempco 20 20 20 ppm/°C typ
LOGIC INPUTS
Input High Voltage, V
INH
3 3 3 V min AV
DD
= DV
DD
= 4.5 V to 5.5 V
2.1 2.1 2.1 V min AV
DD
= DV
DD
= 3.0 V to 3.6 V
Input Low Voltage, V
INL
0.4 0.4 0.4 V max AV
DD
= DV
DD
= 4.5 V to 5.5 V
0.6 0.6 0.6 V max AV
DD
= DV
DD
= 3.0 V to 3.6 V
Input Current, I
IN
±10 ± 10 ±10 µA max Typically 10 nA, V
IN
= 0 V or V
DD
Input Capacitance, C
IN
4
10 10 10 pF max
LOGIC OUTPUTS
Output High Voltage, V
OH
I
SOURCE
= 200 µA
4 4 4 V min AV
DD
= DV
DD
= 4.5 V to 5.5 V
2.4 2.4 2.4 V min AV
DD
= DV
DD
= 3.0 V to 3.6 V
Output Low Voltage, V
OL
0.4 0.4 0.4 V max I
SINK
= 0.8 mA
Floating-State Leakage Current ±10 ±10 ±10 µA max
Floating-State Output Capacitance
4
10 10 10 pF max
Output Coding Straight (Natural) Binary Unipolar Input Range
Twos Complement Bipolar Input Range
CONVERSION RATE t
CLKIN
× 18
Conversion Time 4.6 (10) 4.6 (9) 4.6 (9) µs max (L Versions Only, 0°C to +70°C, 1.8 MHz CLKIN)
Track/Hold Acquisition Time 0.5 (1) 0.5 (1) 0.5 (1) µs min (L Versions Only, –40°C to +85°C, 1 MHz CLKIN)
AD7854/AD7854L–SPECIFICATIONS
1, 2
(AV
DD
= DV
DD
= +3.0 V to +5.5 V, REF
IN
/REF
OUT
= 2.5 V
External Reference, f
CLKIN
= 4 MHz (for L Version: 1.8 MHz (0ⴗC to +70ⴗC) and 1 MHz (–40ⴗC to +85ⴗC)); f
SAMPLE
= 200 kHz (AD7854), 100 kHz
(AD7854L); T
A
= T
MIN
to T
MAX
, unless otherwise noted.) Specifications in () apply to the AD7854L.
–2–
REV. B