Data Sheet
AD9670
Parameter1
Signal-to-Noise Ratio (SNR)
Test Conditions/Comments
Min
Typ
69
59
−130
−70
−62
−61
−55
−54
Max
Unit
dBFS
dBFS
dBc/√Hz
dBc
dBc
dBc
dBc
dBc
fIN = 5 MHz at −12 dBFS, VGAIN = −1.6 V
fIN = 5 MHz at −1 dBFS
Close In SNR
Second Harmonic
fIN = 3.5 MHz at −1 dBFS, VGAIN = 0 V, 1 kHz offset
fIN = 5 MHz at −12 dBFS, VGAIN = −1.6 V
fIN = 5 MHz at −1 dBFS, VGAIN = 1.6 V
fIN = 5 MHz at −12 dBFS, VGAIN = −1.6 V
fIN = 5 MHz at −1 dBFS, VGAIN = 1.6 V
Third Harmonic
Two-Tone Intermodulation
Distortion (IMD3)
fRF1 = 5.015 MHz, fRF2 = 5.020 MHz, ARF1 = −1 dBFS,
ARF2 = −21 dBFS, VGAIN = 1.6 V, IMD3 relative to ARF2
Channel-to-Channel Crosstalk
fIN1 = 5.0 MHz at −1 dBFS
Overrange condition2
−60
−55
dB
dB
GAIN ACCURACY
TA = 25°C
Gain Law Conformance Error
−1.6 < VGAIN < −1.28 V
−1.28 V < VGAIN ≤ +1.28 V
1.28 V < VGAIN < 1.6 V
VGAIN = 0 V, normalized for ideal antialiasing filter loss
−1.28 V < VGAIN < +1.28 V, 1 σ
0.4
dB
dB
dB
dB
dB
dB
−1.3
−1.3
+1.3
+1.3
−0.5
Linear Gain Error
Channel-to-Channel Matching
PGA Gain
0.1
21/24/27/30
GAIN CONTROL INTERFACE
Control Range
Control Common Mode
Input Impedance
Gain Range
Differential
GAIN+, GAIN−
GAIN+, GAIN−
−1.6
0.7
+1.6
0.9
V
V
0.8
10
45
14
3.5
750
MΩ
dB
dB/V
dB
ns
Scale Factor
Analog
Digital step size
Analog 45 dB change
Response Time
CW DOPPLER MODE
LO Frequency
fLO = fMLO/M
1
10
MHz
Phase Resolution
Per channel, 4LO3 mode
Per channel, 8LO mode, 16LO mode
CWI+, CWI−, CWQ+, and CWQ−
Per CWI+, CWI−, CWQ+, and CWQ−, each channel
enabled (2 fLO and baseband signal)
45
22.5
AVDD2/2
2.2
Degrees
Degrees
V
Output DC Bias (Single-Ended)
Output AC Current Range
2.5
mA
Transconductance (Differential)
Demodulated IOUT/VIN, per CWI+, CWI−, CWQ+, and
CWQ−
LNA gain = 15.6 dB
LNA gain = 17.9 dB
LNA gain = 21.6 dB
RS = 0 Ω, RFB = ∞
LNA gain = 15.6 dB
LNA gain = 17.9 dB
LNA gain = 21.6 dB
RS = 50 Ω, RFB = ∞
LNA gain = 15.6 dB
LNA gain = 17.9 dB
LNA gain = 21.6 dB
RS = 0 Ω, RFB = ∞
3.3
4.3
6.6
mA/V
mA/V
mA/V
Input Referred Noise Voltage
Noise Figure
1.6
1.3
1.0
nV/√Hz
nV/√Hz
nV/√Hz
5.7
4.5
3.4
dB
dB
dB
Dynamic Range
LNA gain = 15.6 dB
LNA gain = 17.9 dB
LNA gain = 21.6 dB
−3 dBFS input, fRF = 2.5 MHz, fLO = 40 MHz, 1 kHz
offset, 16LO mode, 1 channel enabled
164
162
160
156
dBFS/√Hz
dBFS/√Hz
dBFS/√Hz
dBc/√Hz
Close In SNR
−3 dBFS input, fRF = 2.5 MHz, fLO = 40 MHz, 1 kHz
offset, 16LO mode, 8 channels enabled
161
dBc/√Hz
Rev. A | Page 5 of 52