Features: Fast 16-Bit ADC with 200 kSPS Throughput
Four Single-Ended Analog Input Channels
Single +5 V Supply Operation
Input Ranges: 0 V to +4 V, 0 V to +5 V and ±10 V
120 mW Max Power Dissipation
Power-Down Mode 50 mW
Choice of External or Internal 2.5 V Reference
On-Chip Clock
Power-Down Mode
Pinout
Specifications
| Resolution (Bits) |
16bit |
| T-Put Rate |
200kSPS |
| # Chan |
4 |
| Supply V |
Single(+5) |
| Pwr Diss |
120mW |
| Interface |
Ser,SPI |
| Ain Range |
Bip 10V,Uni 4.0V,Uni 5.0V |
| SNR (dB) |
85dB |
| Pkg Type |
DIP,SOIC,SOP |
Analog Inputs
VxA, VxB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 V
CAP . . . . . . . . . . . . . . . . +VANA + 0.3 V to AGND2 0.3 V
REF . . . . . . . . . . . . . . . . . . . . Indefinite Short to AGND2,
Momentary Short to VANA
Ground Voltage Differences
DGND, AGND1, AGND2 . . . . . . . . . . . . . . . . . . . 0.3 V
Supply Voltages
VANA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7 V
VDIG to VANA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
VDIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7 V
Digital Inputs . . . . . . . . . . . . . . . . . . . 0.3 V to VDIG + 0.3 V
Internal Power Dissipation2
PDIP (N), SOIC (R), SSOP (RS) . . . . . . . . . . . . . 700 mW
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . .+150 C
Storage Temperature Range N, R . . . . . . . . 65 C to +150 C
Lead Temperature Range
(Soldering 10 sec) . . . . . . . . . . . . . . . . . . . . . . . . . .+300 C
DescriptionThe AD974 is a four-channel, data acquisition system with a serial interface. The part contains an input multiplexer, a highspeed 16-bit sampling ADC and a +2.5 V reference. All of this operates from a single +5 V power supply that also has a powerdown mode. The part will accommodate 0 V to +4 V, 0 V to +5 V or 10 V analog input ranges.
The interface is designed for an efficient transfer of data while requiring a low number of interconnects.
The AD974 is comprehensively tested for ac parameters such as SNR and THD, as well as the more traditional parameters of offset, gain and linearity.
The AD974 is fabricated on Analog Devices' BiCMOS process, which has high performance bipolar devices along with CMOS transistors.
The AD974 is available in 28-lead DIP, SOIC and SSOP packages.
AD974 Data Sheet
