AD7989-5 18-Bit, 500 kSPS PulSAR ADCs in MSOP/LFCSP _ BDTIC a Leading Distributor in China

AD7989-5 18-Bit, 500 kSPS PulSAR ADCs in MSOP/LFCSP

The AD7989-1/AD7989-5 are 18-bit, successive approximation, analog-to-digital converters (ADC) that operate from a single power supply, VDD. They contain a low power, high speed, 18-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, the AD7989-1/AD7989-5 sample the voltage difference between the IN+ and IN− pins. The voltages on these pins usually swing in opposite phases between 0 V and VREF. The reference voltage, REF, is applied externally and can be set independent of the supply voltage, VDD. Its power scales linearly with throughput.

The SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus. It is compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic, using the separate VIO supply.

The AD7989-1/AD7989-5 are available in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +85°C.

APPLICATIONS

Battery-powered equipment
Data acquisition systems
Medical instruments
Seismic data acquisition systems

Features and Benefits

Low power dissipation
2 mW at 500 kSPS (V_DD only)
3.5 mW at 500 kSPS (total)
18-bit resolution with no missing codes
Throughput: 500 kSPS
INL: ±1 LSB typical,
±2 LSB maximum
SNR: 98 dB at 1 kHz
(VREF = 5 V)
SINAD: 97 dB at 1 kHz
THD: −120 dB at 10 kHz
Dynamic range: 99 dB
True differential analog input range: ±V_REF
0 V to V_REF with V_REF between
2.4 V and 5.1 V
Allows use of any input range
Easy to drive with the ADA4941-1

No pipeline delay
Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface
SPI-/QSPI™-/MICROWIRE™-/DSP-compatible serial interface
Ability to daisy-chain multiple ADCs
10-lead package: MSOP and 3 mm × 3 mm LFCSP

Analog to Digital Converters

A/D Converters

Data Sheets

Document	note
AD7989-1/AD7989-5: 18-Bit, 100 kSPS/500 kSPS PulSAR ADCs in MSOP/LFCSP Data Sheet (Rev. A)	PDF 514 kB

Application Notes

Document	note
AN-935: Designing an ADC Transformer-Coupled Front End (Rev. 0)	PDF 363 kB
AN-742: Frequency Domain Response of Switched-Capacitor ADCs (Rev. B)	PDF 401 kB
AN-931: Understanding PulSAR ADC Support Circuitry (Rev. 0)	PDF 299 kB

User Guides

Document	note
UG-682: 6-Lead SOT-23 ADC Driver for the 8-/10-Lead Family of 14-/16-/18-Bit PulSAR ADC Evaluation Boards	PDF 433.96 K

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD7989-5BCPZ-R2 Production	10 ld LFCSP (3x3mm)	REEL 250	-40 to 85C	12.92	10.95	Y
AD7989-5BCPZ-RL7 Production	10 ld LFCSP (3x3mm)	REEL 1500	-40 to 85C	0	10.95	Y
AD7989-5BRMZ Production	10 ld MSOP	OTH 50	-40 to 85C	12.92	10.95	Y
AD7989-5BRMZ-RL7 Production	10 ld MSOP	REEL 1000	-40 to 85C	0	10.95	Y