ADS7807P - 16-Bit 40kSPS SAR ADC, ±10V Input | Texas Instruments
料号： ADS7807P ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.4 | $164.00 |
| 100 | $14.2 | $1,420.00 |
| 500 | $12.1 | $6,050.00 |
| 1,000 | $10.65 | $10,650.00 |
ADS7807P 概述
A successive-approximation-register ADC is a converter that performs a binary search against the analog input using an internal DAC, producing a digital output one bit at a time per clock cycle. Within the converter hierarchy, the SAR ADC sits between flash and sigma-delta converters: faster than sigma-delta, lower-power than flash, and ideally suited to multiplexed data-acquisition systems where 12-to-16-bit precision meets 10 kSPS-to-1 MSPS throughput. The ADS7807P occupies the 16-bit, ~40 kSPS node of this spectrum.
Key features of the ADS7807P include ±1.5 LSB maximum integral nonlinearity (INL), 16-bit no-missing-codes performance, 86 dB minimum SINAD at a 1 kHz input, and three software-selectable input ranges: ±10 V, 0 V to +5 V, and 0 V to +4 V. Maximum power dissipation is 35 mW, and a hardware- or software-controlled power-down mode drops quiescent consumption to 50 µW, making the part attractive for battery-powered and multiplexed systems.
Architecture-wise, the part uses a charge-redistribution CDAC with input transient suppression, internal 2.5 V reference (external override supported), and a single +5 V supply rail. The maximum acquisition-plus-conversion time is 25 µs, supporting a maximum throughput of approximately 40 kSPS in classic parallel mode.
Typical applications include industrial process-control front ends, multi-channel data-acquisition boards, portable instrumentation, weigh-scale and sensor-signal digitization, and medical monitoring equipment such as patient-monitoring front ends.
When designing with the ADS7807P, pay close attention to the input-protection RC network, keep analog and digital grounds separated at a single star point, and place the supply decoupling capacitors as close to the AVDD/DVDD pins as the PCB layout allows. A logic-low on R/C initiates conversion, and BUSY remains high until data is latched.
This page consolidates distributor pricing, drop-in cross-references, and practical design notes that are not found in a single place in the manufacturer datasheet, accelerating evaluation and procurement decisions for design engineers.
直接替换替代料： ADS7807P ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ADS7807P （相同外形与封装尺寸） ——差异在于 SINAD, Resolution, Acquisition + Conversion Time, Package, Power Dissipation.
快速对比工具——选择替代料号进行并排对比：
ADS7807U
✅ 直接替换📋 参考替代料（不在目录中）
ADS7807UB
✅ 直接替换📋 参考替代料（不在目录中）
ADS7807U/1K
✅ 直接替换📋 参考替代料（不在目录中）
ADS7807UE4
✅ 直接替换📋 参考替代料（不在目录中）
ADS7806PG4
✅ 直接替换✓ 有现货
$13.2 / 个
查看数据手册 →ADS7806PG4
✅ 直接替换✓ 有现货
$13.2 / 个
查看数据手册 →ADS7806UG4
✅ 直接替换✓ 有现货
$9.85 / 个
查看数据手册 →ADS7807P 最大额定值与电气特性
| 分辨率 | 16 bit |
| Architecture | SAR (Successive Approximation Register) |
| Number of Inputs | 1 single-ended / 1 pseudo-differential |
| Sample Rate (max) | 40 kSPS |
| Input Voltage Ranges | ±10 V, 0 V to +5 V, 0 V to +4 V |
| Integral Nonlinearity (INL) | ±1.5 LSB max |
| Differential Nonlinearity (DNL) | 16 Bits, No Missing Codes |
| SINAD | 86 dB min at 1 kHz input |
| Acquisition + Conversion Time | 25 µs max |
| 电源电压 | +5 V single supply |
| Power Dissipation (active) | 35 mW max |
| Power Dissipation (power-down) | 50 µW |
| Data Interface | Parallel and Serial |
| Reference | Internal 2.5 V or external |
| 封装 | 28-pin PDIP (0.3-inch DIP-28) |
| 工作温度范围 | -40 °C to +85 °C |
| Pin-Compatible With | ADS7806 (12-bit, 100 kSPS) |
| RoHS 状态 | Compliant |
ADS7807P 引脚配置
| 引脚 1 | ANLG — Analog input high |
| 引脚 2 | REF — Reference voltage input/output (internal 2.5 V) |
| 引脚 3 | AGND — Analog ground |
| 引脚 4 | AVDD — Analog +5 V supply |
| 引脚 5 | R1 — Range select input 1 |
| 引脚 6 | R0 — Range select input 0 |
| 引脚 7 | R/C — Read/Convert input (active low to start conversion) |
| 引脚 8 | CS — Chip select (active low) |
| 引脚 9 | BUSY — Busy output (high during conversion) |
| 引脚 10 | DGND — Digital ground |
| 引脚 11 | DVDD — Digital +5 V supply |
| 引脚 12 | DB15 — Parallel data bit 15 (MSB) |
| 引脚 13 | DB14 — Parallel data bit 14 |
| 引脚 14 | DB13 — Parallel data bit 13 |
| 引脚 15 | DB12 — Parallel data bit 12 |
| 引脚 16 | DB11 — Parallel data bit 11 |
| 引脚 17 | DB10 — Parallel data bit 10 |
| 引脚 18 | DB9 — Parallel data bit 9 |
| 引脚 19 | DB8 — Parallel data bit 8 |
| 引脚 20 | DB7 — Parallel data bit 7 |
| 引脚 21 | DB6 — Parallel data bit 6 |
| 引脚 22 | DB5 — Parallel data bit 5 |
| 引脚 23 | DB4 — Parallel data bit 4 |
| 引脚 24 | DB3 — Parallel data bit 3 |
| 引脚 25 | DB2 — Parallel data bit 2 |
| 引脚 26 | DB1 — Parallel data bit 1 |
| 引脚 27 | DB0 — Parallel data bit 0 (LSB) |
| 引脚 28 | TAG — Tag / serial data output (SDATA in serial mode) |
典型应用
ADS7807P 适用于 7 应用s: Industrial Process Control Front End, Multi-Channel Data Acquisition Board, Portable Instrumentation and DMM, Weigh Scale and Load Cell Digitization, Medical Patient Monitoring Front End, Sensor Signal Conditioning Module, Legacy Industrial Test Equipment Retrofit.
Industrial Process Control Front End
The ADS7807P's ±10 V true-bipolar input range, 16-bit no-missing-codes resolution, and ±1.5 LSB max INL make it well matched to industrial process-control front ends reading directly from ±10 V or 4-20 mA-shunt transducers without external signal conditioning. Placed behind a per-channel MUX and RC input filter, the 40 kSPS throughput supports multiplexed scanning of 4-16 channels at typical 1-10 kHz per-channel rates. The single +5 V supply, 28-pin PDIP, and -40 °C to +85 °C industrial temperature range simplify PLC analog-input-module design. Compared with a modern SAR ADC, the ADS7807P's through-hole package eases field-service replacement and conformal-coated board assembly.
推荐
Multi-Channel Data Acquisition Board
The ADS7807P's parallel-byte output and BUSY handshake ease integration with 8-bit microcontroller and DSP data buses in multi-channel data-acquisition boards. With a 25 µs max acquisition-plus-conversion time, four channels can be scanned at 10 kSPS aggregate throughput using an external analog MUX, and the 50 µW power-down mode keeps idle channels low-power between conversions. The 86 dB min SINAD at 1 kHz preserves dynamic range for vibration and acoustic emissions analysis. Per the TI datasheet, the BUSY-line hardware handshake simplifies DMA-driven data transfer on TI MSP430 and C2000 host processors without glue logic.
推荐
Portable Instrumentation and DMM
The ADS7807P's 35 mW active power and 50 µW power-down mode help extend battery life in portable instrumentation and benchtop digital multimeters (DMMs) that need 16-bit DC accuracy. Combined with an external precision resistor divider and OPA2188 zero-drift amplifier, the part can resolve sub-millivolt signals for temperature, strain, and pressure transducer readout. The 28-pin PDIP package is friendly to hand-soldered prototypes and field-repairable test equipment. Compared with a sigma-delta ADC, the SAR architecture settles in a single conversion and avoids digital-filter settling-time artifacts on range-change events.
推荐
Weigh Scale and Load Cell Digitization
The ADS7807P's 16-bit no-missing-codes resolution and ±1.5 LSB INL deliver adequate dynamic range for weigh-scale and load-cell signal chains after a low-noise instrumentation amplifier (typically 100x gain) drives the ADC's ±10 V input. According to the TI datasheet, the part supports 0 V-to-+5 V and 0 V-to-+4 V single-ended ranges that align naturally with unipolar load-cell bridge outputs when biased to mid-supply. The hardware R/C convert-start pin enables precise timing for 50/60 Hz line-noise rejection via synchronized sampling. The -40 °C to +85 °C range suits industrial scale platforms and process weighing.
推荐
Medical Patient Monitoring Front End
The ADS7807P's 86 dB min SINAD at 1 kHz and 16-bit no-missing-codes performance make it suitable for medical patient-monitoring front ends measuring ECG, SpO2 plethysmograph, and respiration waveforms. The ±10 V true-bipolar range accepts the full dynamic range of conditioned biopotential signals, while the 40 kSPS sample rate easily supports the 500 Hz bandwidth required for diagnostic-quality ECG. According to the TI datasheet, the part is specified for -40 °C to +85 °C, sufficient for the operating environment of patient monitors. Modern designs may prefer a smaller package, but the 28-pin PDIP remains useful for medical prototyping and IEC 60601 isolation barriers.
推荐
Sensor Signal Conditioning Module
The ADS7807P's three software-selectable input ranges (±10 V, 0-5 V, 0-4 V) allow a single PCB design to accept multiple sensor output types - strain gauges, thermocouple amplifiers, RTD linearizers, and 4-20 mA loop drops - by changing only the MUX channel. The 40 kSPS throughput is appropriate for industrial sensor hubs scanning 4-8 channels at 5-10 kHz per channel. The 28-pin PDIP package is widely available and easy to source through industrial distributors. According to the TI datasheet, the BUSY line doubles as an end-of-conversion interrupt, simplifying the host-firmware timing model on low-cost MCUs.
推荐
Legacy Industrial Test Equipment Retrofit
The ADS7807P's pin-compatibility with the 12-bit ADS7806 makes it the natural choice for legacy industrial test equipment retrofits that need a 16-bit precision boost on existing 5 V PCBs. The 28-pin PDIP footprint matches the original ADS7806 layout, so no PCB rework is required - only the host firmware is updated for the new 16-bit data word. The 35 mW active dissipation is comparable to the ADS7806, so power-supply design does not change. The TI cross-reference search confirms this is the most common modernization path for 1990s-era data-acquisition cards still in service in factories and laboratories.
推荐
推荐产品汇总
工程参考数据： ADS7807P ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ADS7807U | ADS7807UB | ADS7807U/1K | ADS7807UE4 | ADS7806P | ADS7806PG4 | ADS7806UG4 |
|---|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | PDIP-28 (0.3-inch) | SOIC-28 - same logical pinout | SOIC-28 - same logical pinout | SOIC-28 - same logical pinout | SOIC-28 - same logical pinout | PDIP-28 - same footprint | PDIP-28 - same footprint | SOIC-28 - same logical pinout |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit | 12 bit | 12 bit | 12 bit |
| Sample Rate | 40 kSPS | 40 kSPS | 40 kSPS | 40 kSPS | 40 kSPS | 100 kSPS | 100 kSPS | 100 kSPS |
| Input Voltage Range | ±10 V / 0-5 V / 0-4 V | ±10 V / 0-5 V / 0-4 V | ±10 V / 0-5 V / 0-4 V | ±10 V / 0-5 V / 0-4 V | ±10 V / 0-5 V / 0-4 V | ±10 V / 0-5 V / 0-4 V | ±10 V / 0-5 V / 0-4 V | ±10 V / 0-5 V / 0-4 V |
| RoHS | Compliant | Compliant | Compliant | Compliant | Pb-free E4 finish | Compliant | Pb-free G4 finish | Pb-free G4 finish |
关键差异点
- True ±10 V bipolar input range in a 28-pin PDIP without external signal conditioning （对比 ADS7806P)
- Highest-resolution 16-bit option in the ADS7807 family still in PDIP-28 （对比 ADS7807U)
- Pin-compatible upgrade path for ADS7806 boards with 16-bit modern firmware （对比 ADS7806P)
设计说明
Separate analog and digital grounds at a single star point near the AGND pin, and place the 10 µF tantalum + 0.1 µF ceramic decoupling pair as close as possible to the AVDD and DVDD pins. The 28-pin PDIP package of the ADS7807P has long leads that act as small inductors, so a 1 nF bypass in parallel with the 0.1 µF is recommended for VHF noise suppression. Route the parallel data bus away from the analog ANLG input and the REF pin to avoid digital-coupling noise that can degrade SINAD at low input levels.
Do not drive the ADS7807P ANLG input with a source impedance greater than 1 kΩ without an input buffer - the part's switched-capacitor SAR input draws charge transients and the 25 µs acquisition time assumes a low-impedance drive. According to the TI datasheet, the BUSY signal falling edge is the end-of-conversion indicator; do not poll R/C alone, because it can return high before BUSY falls. When using the internal reference, place a 4.7 µF tantalum bypass on REF to keep noise below the datasheet figure of 10 µVrms typical.
For best 86 dB SINAD performance at the 1 kHz input level, keep the analog input trace length below 25 mm and surround it with a ground guard ring tied to AGND. The DIP-28 footprint of the ADS7807P makes this easy to implement by hand-routing on a 2-layer board. If your design includes a long cable to the transducer, add a unity-gain buffer (e.g., OPA2277) within 50 mm of the ANLG pin to prevent ringing and to avoid degradation of the 16-bit no-missing-codes spec.
Driving R/C high immediately after BUSY falls drops the part into 50 µW power-down mode, ideal for battery-powered multiplexed systems. Wake-up time from power-down is specified by TI and requires a few microseconds to settle the internal reference, so budget that into your per-channel scan time. Avoid leaving R/C floating - the ADS7807P has no internal pull, and an undefined logic level can cause repeated conversions and elevated power consumption.
合规信息
RoHS-compliant per TI product page. No AEC-Q100 qualification - this part targets industrial, not automotive, applications. Pb-free and matte-tin finish. Halogen-free status not explicitly stated in the TI datasheet excerpt.
