AD976/AD976A
(–40؇C to +85؇C, FS = 200 kHz, Ref = Internal Reference, VDIG = VANA = +5 V unless
AD976A–SPECIFICATIONS otherwise noted)
AD976AA
Typ
AD976AB
Typ
AD976AC
Parameter
Min
Max
Min
Max
Min
Typ
Max
Units
RESOLUTION
16
16
16
Bits
ANALOG INPUT
Voltage Range
Impedance
±10
13
22
±10
13
22
±10
13
22
V
kΩ
pF
Capacitance
THROUGHPUT SPEED
Complete Cycle
5
5
5
µs
Throughput Rate
200
200
200
kHz
DC ACCURACY
Integral Linearity Error
Differential Linearity Error
No Missing Codes
±3
+3
±2
+1.75
±3
±2
15
LSB1
LSB
Bit
LSB
%
ppm/°C
%
ppm/°C
mV
–2
15
–1
16
Transition Noise2
1.0
±7
±2
±2
1.0
±7
±2
±2
1.0
Full-Scale Error3, 4
±0.5
±0.5
±10
±0.25
±0.25
±10
±0.5
±0.5
±15
Full-Scale Error Drift
±7
±2
±2
Full-Scale Error, Ext. REF = 2.5 V
Full-Scale Error Drift, Ext. REF = 2.5 V
Bipolar Zero Error4
Bipolar Zero Error Drift
Power Supply Sensitivity
VANA = VDIG = VD = 5 V ± 5%
ppm/°C
±8
±8
±8
LSB
AC ACCURACY
Spurious Free Dynamic Range5
Total Harmonic Distortion5
Signal to (Noise + Distortion)5
–60 dB Input
90
83
83
96
85
85
90
83
83
dB6
dB
dB
dB
dB
–90
–96
–90
27
28
27
Signal to Noise5
Full-Power Bandwidth7
Input Bandwidth
1
2.7
1
2.7
1
2.7
MHz
MHz
SAMPLING DYNAMICS
Aperture Delay
40
40
40
ns
Transient Response
Full-Scale Step
1
1
1
µs
ns
Overvoltage Recovery8
150
150
150
REFERENCE
Internal Reference Voltage
Internal Reference Source Current
External Reference Voltage Range
for Specified Linearity
2.48
2.3
2.5
1
2.52
2.48
2.3
2.5
1
2.52
2.48
2.3
2.5
1
2.52
V
µA
2.5
2.7
2.5
2.7
2.5
2.7
V
External Reference Current Drain
Ext. REF = 2.5 V
100
100
100
µA
DIGITAL INPUTS
Logic Levels
VIL
VIH
IIL
–0.3
+2.0
+0.8
VDIG + 0.3 +2.0
±10
–0.3
+0.8
VDIG + 0.3 +2.0
±10
–0.3
+0.8
VDIG + 0.3
±10
V
V
µA
IIH
±10
±10
±10
µA
NOTES
1LSB means least significant bit. With a ±10 V input, one LSB is 305 µV.
2Typical rms noise at worst case transitions and temperatures.
3Measured with fixed resistors as shown in Figure 5 (AD976) and Figure 6 (AD976A). Adjustable to zero as shown in Figure 7.
4Full-scale error is expressed as the % difference between the actual full-scale code transition voltage and the ideal full-scale transition voltage and includes the effect
of offset error. The full-scale error is the worst case of either the –full-scale or +full-scale code transition voltage errors.
5fIN = 20 kHz (AD976) and fIN = 45 kHz (AD976A), 0.5 dB down, unless otherwise noted.
6All specifications in dB are referred to a full scale ±10 V input.
7Full-power bandwidth is defined as full-scale input frequency at which signal-to-(noise + distortion) degrades to 60 dB or 10 bits of accuracy.
8Recovers to specified performance after a 2 × FS input overvoltage.
Specifications subject to change without notice.
REV. C
–2–
ADI [ ADI ]
