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MFG:ADI D/C:09
Part Number: AD7687
MFG: ADI
D/C: 09
Description: The AD7687 is a 16-bit, charge redistribution, successive approximation, analog-to-digital converter (...
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AD7687
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DataSheet
General Description
AD7687 General Description
The AD7687 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 the voltage difference between IN+ and IN− pins. The voltages on these pins usually swing in opposite phase between 0 V to REF. The reference voltage, REF, is applied externally and can be set up to the supply voltage.
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 and 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 AD7687 is housed in a 10-lead MSOP or a 10-lead QFN1 (LFCSP) with operation specified from −40°C to +85°C.
AD7687 Maximum Ratings
| Parameter | Rating |
| Analog Inputs IN+1, IN−1 REF Supply Voltages VDD, VIO to GND VDD to VIO Digital Inputs to GND Digital Outputs to GND Storage Temperature Range Junction Temperature JA Thermal Impedance JC Thermal Impedance Lead Temperature Range |
GND − 0.3 V to VDD + 0.3 V or ±130 mA GND − 0.3 V to VDD + 0.3 V −0.3 V to +7 V ±7 V −0.3 V to VIO + 0.3 V −0.3 V to VIO + 0.3 V −65°C to +150°C 150°C 200°C/W (MSOP-10) 44°C/W (MSOP-10) JEDEC J-STD-20 |
AD7687 Features
16-bit resolution with no missing codes
Throughput: 250 kSPS
INL: ±0.4 LSB typ, ±1.5 LSB max (±23 ppm of FSR)
Dynamic range: 96.5 dB
S/(N + D): 95.5 dB @ 20 kHz
THD: −118 dB @ 20 kHz
True differential analog input range
±VREF
0 V to VREF with VREF up to VDD on both inputs
No pipeline delay
Single-supply 2.3 V to 5.5 V operation with
1.8 V/2.5 V/3 V/5 V logic interface
Serial interface SPI®/QSPI™/MICROWIRE™/DSP-compatible
Daisy-chain multiple ADCs and BUSY indicator
Power dissipation
1.35 mW @ 2.5 V/100 kSPS, 4 mW @ 5 V/100 kSPS, and
1.4 µW @ 2.5 V/100 SPS
Standby current: 1 nA
10-lead MSOP (MSOP-8 size) and
3 mm * 3 mm QFN1 (LFCSP) (SOT-23 size)
Pin-for-pin compatible with AD7685, AD7686, and AD7688
Throughput: 250 kSPS
INL: ±0.4 LSB typ, ±1.5 LSB max (±23 ppm of FSR)
Dynamic range: 96.5 dB
S/(N + D): 95.5 dB @ 20 kHz
THD: −118 dB @ 20 kHz
True differential analog input range
±VREF
0 V to VREF with VREF up to VDD on both inputs
No pipeline delay
Single-supply 2.3 V to 5.5 V operation with
1.8 V/2.5 V/3 V/5 V logic interface
Serial interface SPI®/QSPI™/MICROWIRE™/DSP-compatible
Daisy-chain multiple ADCs and BUSY indicator
Power dissipation
1.35 mW @ 2.5 V/100 kSPS, 4 mW @ 5 V/100 kSPS, and
1.4 µW @ 2.5 V/100 SPS
Standby current: 1 nA
10-lead MSOP (MSOP-8 size) and
3 mm * 3 mm QFN1 (LFCSP) (SOT-23 size)
Pin-for-pin compatible with AD7685, AD7686, and AD7688
AD7687 Typical Application
Battery-powered equipment
Data acquisitions
Instrumentation
Medical instruments
Process controls
Data acquisitions
Instrumentation
Medical instruments
Process controls
AD7687 Connection Diagram
AD7687
PDF/DataSheet Download
- Datasheet: AD7687
- File Size: 1810073 KB
- Manufacturer: AD
- Click here to Download
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