Function : 16-Bit, 250 kSPS PulSAR ADC in MSOP/QFN
Maker : Analog Devices
Pinouts :
Description :
GENERAL DESCRIPTION
The AD7685 is a 16-bit, charge redistribution successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.3 V to 5.5 V. It contains a low power, high speed, 16-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. The part also contains a low noise, wide bandwidth, short aperture delay, track-and-hold circuit. On the CNV rising edge, it samples an analog input IN+ between 0 V to REF with respect to a ground sense IN−. The reference voltage, REF, is applied externally and can be set up to the supply voltage. Power dissipation 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 or provides an optional BUSY indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using the separate supply VIO. The AD7685 is housed in a 10-lead MSOP or a 10-lead QFN (LFCSP) with operation specified from −40°C to +85°C.
FEATURES
16-bit resolution with no missing codes
Throughput: 250 kSPS
INL: ±0.6 LSB typical, ±2 LSB maximum (±0.003% of FSR)
SINAD: 93.5dB @ 20 kHz
THD: −110 dB @ 20 kHz
Pseudo differential analog input range
0 V to VREFwith VREFup to VDD
No pipeline delay
Single-supply operation 2.3 V to 5.5 V with
1.8 V to 5 V logic interface
Serial interface SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible
Daisy-chain multiple ADCs, BUSY indicator
Power dissipation
1.4μW @ 2.5 V/100 SPS
1.35mW @ 2.5 V/100 kSPS, 4mW @ 5 V/100 kSPS
Standby current: 1 nA
10-lead package: MSOP (MSOP-8 size) and
3 mm × 3 mm QFN (LFCSP) (SOT-23 size)
Pin-for-pin-compatible with 10-lead MSOP/QFN PulSAR® ADCs
APPLICATIONS
Battery-powered equipment
Medical instruments
Mobile communications
Personal digital assistants (PDAs)
Data acquisition
Instrumentation
Process controls
Datasheet PDF Download :
Others datasheet of same file : AD7685,AD7685ACPZRL,AD7685ACPZRL7,AD7685ARMZ,AD7685ARMZRL7