Datasheet

Data Sheet AD7264
Rev. B | Page 3 of 28
SPECIFICATIONS
AV
CC
= 4.75 V to 5.25 V, C
A
_C
B
V
CC
= C
C
_C
D
V
CC
= 2.7 V to 5.25 V, V
DRIVE
= 2.7 V to 5.25 V, f
S
= 1 MSPS and f
SCLK
= 34 MHz for the
AD7264, f
S
= 500 kSPS and f
SCLK
= 20 MHz for the AD7264-5, V
REF
= 2.5 V internal/external; T
A
= −40°C to +105°C, unless otherwise noted.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
DYNAMIC PERFORMANCE
1
f
IN
= 100 kHz sine wave
Signal-to-Noise Ratio (SNR)
2
76 78 dB PGA gain setting = 2
Signal-to-(Noise + Distortion) Ratio
(SINAD)
2
74 77 dB
Total Harmonic Distortion (THD)
2
−85 −77 dB
Spurious-Free Dynamic Range (SFDR) −97 dB
Common-Mode Rejection Ratio (CMRR) −76 dB For PGA gain setting = 2, ripple
frequency of 50 Hz/60 Hz; see
Figure 17 and Figure 18
ADC-to-ADC Isolation
2
−90 dB
Bandwidth
3
1.2 MHz @ −3 dB; PGA gain setting = 128
1.7 MHz @ −3 dB; PGA gain setting = 2
DC ACCURACY
Resolution 14 Bits
Integral Nonlinearity
2
±1.5
±3
LSB
Differential Nonlinearity
2
±0.5 ±0.99 LSB Guaranteed no missed codes to 14 bits
Positive Full-Scale Error
2
±0.122 ±0.305 % FSR Precalibration
±0.018 % FSR Postcalibration
Positive Full-Scale Error Match
2
±0.061 % FSR
Zero Code Error
2
±0.092
±0.244
% FSR
Precalibration
±0.012 % FSR Postcalibration
Zero Code Error Match
2
±0.061 % FSR
Negative Full-Scale Error
2
±0.122 ±0.305 % FSR Precalibration
±0.018 % FSR Postcalibration
Negative Full-Scale Error Match
2
±0.061 % FSR
Zero Code Error Drift 2.5 µV/°C
ANALOG INPUT
Input Voltage Range, V
IN
+ and V
IN
−
Gain2
V
V
REF
CM
×
±
V V
CM
= AV
CC
/2; PGA gain setting ≥ 2
Common-Mode Voltage Range, V
CM
V
CM
− 100 mV V
CM
+ 100 mV V V
CM
= 2 V; PGA gain setting = 1;
see Figure 19
4
(V
CC
/2) − 0.4 (V
CC
/2) + 0.2 V V
CM
= AV
CC
/2; PGA gain setting = 2
(V
CC
/2) − 0.4 (V
CC
/2) + 0.4 V V
CM
= AV
CC
/2; 3 ≤ PGA gain setting ≤ 32
(V
CC
/2) − 0.6 (V
CC
/2) + 0.8 V V
CM
= AV
CC
/2; PGA gain setting ≥ 48
DC Leakage Current ±0.001 ±1 µA
Input Capacitance
3
5
pF
Input Impedance
3
1 GΩ
REFERENCE INPUT/OUTPUT
Reference Output Voltage
5
2.495 2.5 2.505 V 2.5 V ± 5 mV max @ 25°C
Reference Input Voltage 2.5 V
DC Leakage Current ±0.3 ±1 µA External reference applied to
Pin V
REF
A/Pin V
REF
B
Input Capacitance
3
20 pF
V
REF
A, V
REF
B Output Impedance
3
4 Ω
Reference Temperature Coefficient 20 ppm/°C
V
REF
Noise
3
20 µV rms