AD7988-5 16-Bit, 500ksps, Ultra Lower Power 16 bit SAR ADC

The AD7988-1/AD7988-5 are 16-bit, successive approximation, analog-to-digital converters (ADC) that operate from a single power supply, VDD. The AD7988-1 offers a 100 kSPS throughput, and the AD7988-5 offers a 500 kSPS throughput. They are low power, 16-bit sampling ADCs with a versatile serial interface port. On the CNV rising edge, they sample an analog input, IN+, between 0 V to VREF with respect to a ground sense, IN−. The reference voltage, REF, is applied externally and can be set independent of the supply voltage, VDD.

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

The AD7988-1/AD7988-5 generics are housed in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +125°C.

Applications

Features and Benefits

Low power dissipation

2 mW at 500 kSPS (VDD only)
3.5 mW at 500 kSPS (total)

2 mW at 500 kSPS (VDD only)

3.5 mW at 500 kSPS (total)

16-bit resolution with no missing codes

Throughput: 100 kSPS/500 kSPS options

INL: ±0.6 LSB typical, ±1.25 LSB maximum

SINAD: 91.5 dB at 10 kHz

THD: −114 dB at 10 kHz

Pseudo differential analog input range

0 V to VREF with VREF from 2.5 V to 5.5 V

0 V to VREF with VREF from 2.5 V to 5.5 V

No pipeline delay

Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface

Proprietary SPI-/QSPI™-/MICROWIRE™-/DSP-compatible serial interface

Daisy-chain multiple ADCs

10-lead MSOP and 10-lead, 3 mm × 3 mm LFCSP, same space as SOT-23

Wide operating temperature range: −40°C to +125°C

Data Sheets

Document	note
AD7988-1/AD7988-5: 16-Bit Lower Power PulSAR ADCs in MSOP/LFCSP Data Sheet (Rev. F)	PDF 576.72 K

Application Notes

Document	note
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-340: Evaluation Board for the 10-Lead Family 14-/16-/18-Bit PulSAR ADCs	PDF 4636 kB
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

Technical Books

Document	note

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD7988-5BCPZ-RL Production	10 ld LFCSP (3x3mm)	REEL 5000	-40 to 125C	0	6.55	Y
AD7988-5BCPZ-RL7 Production	10 ld LFCSP (3x3mm)	REEL 1500	-40 to 125C	0	6.55	Y
AD7988-5BRMZ Production	10 ld MSOP	OTH 50	-40 to 125C	7.73	6.55	Y
AD7988-5BRMZ-RL7 Production	10 ld MSOP	REEL 1000	-40 to 125C	0	6.55	Y

Evaluation Boards

Part Number	Description	Price	RoHS
EVAL-AD7685-PMDZ	Evaluation Board PMOD compatible form factor	27	Y
EVAL-AD7686-PMDZ	Evaluation Board PMOD compatible form factor	27	Y
EVAL-AD7687-PMDZ	Evaluation Board PMOD compatible form factor	27	Y
EVAL-AD7688-PMDZ	Evaluation Board PMOD compatible form factor	27	Y
EVAL-AD7690-PMDZ	Evaluation Board PMOD compatible form factor	27	Y
EVAL-AD7691-PMDZ	Evaluation Board PMOD compatible form factor	27	Y
EVAL-AD7693-PMDZ	Evaluation Board PMOD compatible form factor	27	Y
EVAL-AD7942-PMDZ	Evaluation Board PMOD compatible form factor	27	Y
EVAL-AD7946-PMDZ	Evaluation Board PMOD compatible form factor	27	Y
EVAL-AD7980-PMDZ	Evaluation Board PMOD compatible form factor	27	Y
EVAL-AD7982-PMDZ	Evaluation Board PMOD compatible form factor	27	Y
EVAL-AD7983-PMDZ	Evaluation Board PMOD compatible form factor	27	Y
EVAL-AD7984-PMDZ	Evaluation Board PMOD compatible form factor	27	Y
EVAL-AD7988-1-PMDZ	Evaluation Board PMOD compatible form factor	27	Y
EVAL-AD7988-5-PMDZ	Evaluation Board PMOD compatible form factor	27	Y
EVAL-AD7988-5SDZ	Evaluation Board SDP Interface	99	Y
EVAL-SDP-CB1Z	Evaluation Controller Board SDP	99	Y
SDP-PMD-IB1Z	Evaluation Interposer Board PMOD to SDP w/ Power Supply	55	Y