Datasheet

REV. B
AD7470/AD7472
–2–
AD7470–SPECIFICATIONS
1
(V
DD
= 2.7 V to 5.25 V
2
, REF IN = 2.5 V, f
CLKIN
= 30 MHz @ 5 V and 24 MHz @ 3 V;
T
A
= T
MIN
to T
MAX
3
, unless otherwise noted.)
Parameter A Version
1
Unit Test Conditions/Comments
DYNAMIC PERFORMANCE 5 V 3 V f
S
= 1.75 MSPS @ 5 V, f
S
= 1.5 MSPS @ 3 V
Signal to Noise + Distortion (SINAD) 60 60 dB min f
IN
= 500 kHz Sine Wave
60 60 dB min f
IN
= 100 kHz Sine Wave
Signal-to-Noise Ratio (SNR) 60 60 dB min f
IN
= 500 kHz Sine Wave
60 60 dB min f
IN
= 100 kHz Sine Wave
Total Harmonic Distortion (THD) –83 –83 dB typ f
IN
= 500 kHz Sine Wave
–75 –75 dB max f
IN
= 100 kHz Sine Wave
Peak Harmonic or Spurious Noise (SFDR) –85 –85 dB typ f
IN
= 500 kHz Sine Wave
–75 –75 dB max f
IN
= 100 kHz Sine Wave
Intermodulation Distortion (IMD)
Second-Order Terms –79 –75 dB typ f
IN
= 500 kHz Sine Wave
–75 –75 dB max f
IN
= 100 kHz Sine Wave
Third-Order Terms –77 –75 dB typ f
IN
= 500 kHz Sine Wave
–75 –75 dB max f
IN
= 100 kHz Sine Wave
Aperture Delay 5 5 ns typ
Aperture Jitter 15 15 ps typ
Full Power Bandwidth 20 20 MHz typ @ 3 dB
DC ACCURACY f
S
= 1.75 MSPS @ 5 V; f
S
= 1.5 MSPS @ 3 V
Resolution 10 10 Bits
Integral Nonlinearity ± 1 ± 1 LSB max
Differential Nonlinearity ± 0.9 ± 0.9 LSB max Guaranteed No Missed Codes to 10 Bits
Offset Error ± 2.5 ± 2.5 LSB max
Gain Error ± 1 ± 1 LSB max
ANALOG INPUT
Input Voltage Ranges 0 to REF IN 0 to REF IN V
DC Leakage Current ± 1 ± 1 µA max
Input Capacitance 33 33 pF typ
REFERENCE INPUT
REF IN Input Voltage Range 2.5 2.5 V ±1% for Specified Performance
DC Leakage Current ± 1 ± 1 µA max
Input Capacitance 10/20 10/20 pF typ Track-and-Hold Mode
LOGIC INPUTS
Input High Voltage, V
INH
2.4 2.4 V min
Input Low Voltage, V
INL
0.4 0.4 V max
Input Current, I
IN
± 1 ± 1 µA max Typically 10 nA, V
IN
= 0 V or V
DD
Input Capacitance, C
IN
4
10 10 pF max
LOGIC OUTPUTS
Output High Voltage, V
OH
V
DRIVE
– 0.2 V
DRIVE
– 0.2 V min I
SOURCE
= 200 µA
Output Low Voltage, V
OL
0.4 0.4 V max I
SINK
= 200 µA
Floating-State Leakage Current ± 10 ± 10 µA max V
DD
= 2.7 V to 5.25 V
Floating-State Output Capacitance 10 10 pF max
Output Coding Straight (Natural) Binary
CONVERSION RATE
Conversion Time 12 12 CLK IN Cycles (max)
Track-and-Hold Acquisition Time 135 135 ns min
Throughput Rate 1.75 1.5 MSPS max Conversion Time + Acquisition Time
CLK IN of 30 MHz @ 5 V and 24 MHz @ 3 V
POWER REQUIREMENTS
V
DD
+2.7/+5.25 V min/max
I
DD
5
Digital Inputs = 0 V or DV
DD
Normal Mode 2.4 mA max V
DD
= 4.75 V to 5.25 V; f
S
= 1.75 MSPS; Typ 2 mA
Quiescent Current 900 µA max V
DD
= 4.75 V to 5.25 V; f
S
= 1.75 MSPS
Normal Mode 1.5 mA max V
DD
= 2.7 V to 3.3 V; f
S
= 1.5 MSPS; Typ 1.3 mA
Quiescent Current 800 µA max V
DD
= 2.7 V to 3.3 V; f
S
= 1.5 MSPS
Sleep Mode 1 µA max CLK IN = 0 V or DV
DD
Power Dissipation
5
Digital Inputs = 0 V or DV
DD
Normal Mode 12 mW max V
DD
= 5 V
4.5 mW max V
DD
= 3 V
Sleep Mode 5 µW max V
DD
= 5 V; CLK IN = 0 V or DV
DD
3 µW max V
DD
= 3 V; CLK IN = 0 V or DV
DD
NOTES
1
Temperature ranges as follows: A Version: –40°C to +85°C.
2
The AD7470 functionally works at 2.35 V. Typical specifications @ 25°C for SNR (100 kHz) = 59 dB; THD (100 kHz) = –84 dB; INL ± 0.8 LSB.
3
The AD7470 will typically maintain A-grade performance up to 125°C, with a reduced CLK of 20 MHz @ 5 V and 16 MHz @ 3 V. Typical sleep mode current @ 125°C is 700 nA.
4
Sample tested @ 25°C to ensure compliance.
5
See Power vs. Throughput Rate section.
Specifications subject to change without notice.