Features: 80 MSPS Guaranteed Sample Rate SNR = 75 dB, fIN 15 MHz @ 80 MSPS SNR = 72 dB, fIN 200 MHz @ 80 MSPS SFDR = 89 dBc, fIN 70 MHz @ 80 MSPS 100 dB Multitone SFDR IF Sampling to 200 MHz Sampling Jitter 0.1 ps 1.5 W Power Dissipation Differential Analog Inputs Pin-Compatible to AD6644 Two's Complement Digital Output Format 3.3 V CMOS-Compatible DataReady for Output LatchingApplicationMultichannel, Multimode Receivers Base Station Infrastructure AMPS, IS-136, CDMA, GSM, WCDMA Single Channel Digital Receivers Antenna Array Processing
Communications Instrumentation Radar, Infrared Imaging InstrumentationPinout
Specifications
| Parameter |
Min |
Max |
|
ELECTRICAL
AVCC Voltage
Analog Input Voltage
Analog Input Current
Digital Input Voltage
Digital Output Current |
0
0
0
0 |
7
7
AVCC
25
AVCC
4 |
V
V
V
mA
V
mA |
ENVIRONMENTAL
Operating Temperature Range (Ambient)
Maximum Junction Temperature
Lead Temperature (Soldering, 10 sec)
Storage Temperature Range (Ambient) |
40
65
|
+85
150
300
+150 |
|
| Resolution (Bits) |
14bit |
| T-Put Rate |
105MSPS |
| # Chan |
1 |
| Supply V |
Multi(+3.3, +5) |
| Pwr Diss |
1.75W |
| Interface |
Par |
| Ain Range |
2.2 V p-p |
| SNR (dB) |
75dB |
| Pkg Type |
QFP |
DescriptionThe AD6645 is a high-speed, high-performance, monolithic 14-bit analog-to-digital converter. All necessary functions, including track-and-hold (T/H) and reference, are included on the chip to provide a complete conversion solution. The AD6645 provides CMOS-compatible digital outputs. It is the fourth generation in a wideband ADC family, preceded by the AD9042 (12-bit, 41 MSPS), the AD6640 (12-bit, 65 MSPS, IF sampling), and the AD6644 (14-bit, 40 MSPS/65 MSPS).
Designed for multichannel, multimode receivers, the AD6645 is part of Analog Device's SoftCell(TM) transceiver chipset. The AD6645 maintains 100 dB multitone, spurious-free dynamic range (SFDR) through the second Nyquist band. This break- through performance eases the burden placed on multimode
digital receivers (software radios) that are typically limited by the ADC. Noise performance is exceptional; typical signal-to- noise ratio is 74.5 dB through the first Nyquist band.
The AD6645 is built on Analog Devices' high-speed complemen- tary bipolar process (XFCB) and uses an innovative, multipass circuit architecture. Units are available in a thermally enhanced 52- (R) lead PowerQuad 4 (LQFP_ED) specified from 40C to +85C.
AD6645 Data Sheet
