DV
+3.0 to
REF
= 2.5
AD7858/AD7858L–SPECIFICATIONS
1,
C),
2
1(AV A=and B=GradesV(–40+5.5toV,+85 C)/REFL Version);V External
Reference unless otherwise noted, f
= 4 MHz (1.8 MHz B Grade (0 C to +70
MHz
C
for
f
=
DD
DD
IN
OUT
200 kHz (AD7858), 100 kHz (AD7858L);
SLEEP
= Logic High; T
A
= T
MIN
to T
MAX
, unless otherwise noted.) Specifications in ( ) apply to the AD7858L.
Parameter
DYNAMIC PERFORMANCE
Signal to Noise + Distortion Ratio
3
(SNR)
Total Harmonic Distortion (THD)
Peak Harmonic or Spurious Noise
Intermodulation Distortion (IMD)
Second Order Terms
Third Order Terms
Channel-to-Channel Isolation
DC ACCURACY
Resolution
Integral Nonlinearity
A Version
1
B Version
1
70
–78
–78
–78
–78
–90
12
±
1
±
1
(± 1)
±
1
±
1
±
5
±
2.5
(± 3)
(± 1.5)
1.5
±
4
±
1.5
1
0 to V
REF
±
1
20
2.3/V
DD
150
2.3/2.7
20
2.4
2.1
0.8
0.6
±
10
10
71
–78
–78
–80
–80
–90
12
±
1
±
0.5
(± 1)
±
1
±
1
±
5
±
2.5
(± 3)
(± 1.5)
1.5
±
4
±
1.5
1
0 to V
REF
±
1
20
2.3/V
DD
150
2.3/2.7
20
2.4
2.1
0.8
0.6
±
10
10
Units
dB min
dB max
dB max
dB typ
dB typ
dB typ
Bits
LSB max
LSB max
LSB max
LSB max
LSB max
LSB typ
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
Volts
µA
max
pF typ
V min/max
kΩ typ
V min/max
ppm/°C typ
V min
V min
V max
V max
µA
max
pF max
Functional from 1.2 V
Test Conditions/Comments
Typically SNR is 72 dB
V
IN
= 10 kHz Sine Wave, f
SAMPLE
= 200 kHz (100 kHz)
V
IN
= 10 kHz Sine Wave, f
SAMPLE
= 200 kHz (100 kHz)
V
IN
= 10 kHz Sine Wave, f
SAMPLE
= 200 kHz (100 kHz)
fa = 9.983 kHz, fb = 10.05 kHz, f
SAMPLE
= 200 kHz (100 kHz)
fa = 9.983 kHz, fb = 10.05 kHz, f
SAMPLE
= 200 kHz (100 kHz)
V
IN
= 25 kHz
Any Channel
2.5 V External Reference V
DD
= 3 V, V
DD
= 5 V (B Grade Only)
5 V External Reference V
DD
= 5 V
(L Version, 5 V External Reference, V
DD
= 5 V)
(L Version)
Guaranteed No Missed Codes to 12 Bits. 2.5 V External
Reference V
DD
= 3 V, 5 V External Reference, V
DD
= 5 V
Typically
±
2 LSBs
5 V External Reference, V
DD
= 5 V
(L Version)
(L Version, 5 V External Reference, V
DD
= 5 V)
CLKIN
SAMPLE
Differential Nonlinearity
Total Unadjusted Error
Unipolar Offset Error
Unipolar Offset Error Match
Positive Full-Scale Error
Positive Full-Scale Error Match
ANALOG INPUT
Input Voltage Ranges
Leakage Current
Input Capacitance
REFERENCE INPUT/OUTPUT
REF
IN
Input Voltage Range
Input Impedance
REF
OUT
Output Voltage
REF
OUT
Tempco
LOGIC INPUTS
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current, I
IN
Input Capacitance, C
IN4
LOGIC OUTPUTS
Output High Voltage, V
OH
5 V External Reference, V
DD
= 5 V
i.e., AIN(+) – AIN(–) = 0 to V
REF
, AIN(–) can be biased
up but AIN(+) cannot go below AIN(–)
AV
DD
= DV
DD
= 4.5 V to 5.5 V
AV
DD
= DV
DD
= 3.0 V to 3.6 V
AV
DD
= DV
DD
= 4.5 V to 5.5 V
AV
DD
= DV
DD
= 3.0 V to 3.6 V
Typically 10 nA, V
IN
= 0 V or V
DD
Output Low Voltage, V
OL
Floating-State Leakage Current
Floating-State Output Capacitance
4
Output Coding
CONVERSION RATE
Conversion Time
Track/Hold Acquisition Time
4
4
2.4
2.4
0.4
0.4
±
10
±
10
10
10
Straight (Natural) Binary
4.6 (18)
0.4 (1)
4.6
(10)
0.4 (1)
V min
V min
V max
µA
max
pF max
I
SOURCE
= 200
µA
AV
DD
= DV
DD
= 4.5 V to 5.5 V
AV
DD
= DV
DD
= 3.0 V to 3.6 V
I
SINK
= 0.8 mA
µs
max
µs
max
µs
min
(L Versions Only, –40°C to +85°C, 1 MHz CLKIN)
(L Versions Only, 0°C to +70°C, 1.8 MHz CLKIN)
(L Versions Only)
–2–
REV. B
AD [ ANALOG DEVICES ]
