TLV0834CPWRG4 - 8-Bit 41kSPS 4-Ch SAR ADC, 16-TSSOP | Texas Instruments
MPN： TLV0834CPWRG4 ✗ 停產TLV0834CPWRG4 概覽
A SAR ADC is a type of analog-to-digital converter that uses a binary-search algorithm with an internal capacitive charge-redistribution DAC and a high-speed comparator to digitize an analog input in N clock cycles for N-bit resolution. Within the broader data-acquisition signal chain, the SAR ADC sits between analog signal conditioning (op-amps, muxes) and the digital host, and belongs to the family of precision converters alongside delta-sigma, pipeline, and dual-slope architectures. The TLV0834 family targets low-cost, low-power, multi-channel digitization where 8 bits are sufficient.
Key features include 41 kSPS throughput, 2.7 V to 3.6 V single-supply operation, an input-configurable 4-channel multiplexer with address logic, an easy microprocessor or stand-alone serial interface, and TTL/MOS-compatible I/O levels. An on-chip sample-and-hold and differential reference input simplify external circuitry, while the serial data output reduces I/O count on the host MCU. The TSSOP-16 footprint keeps the device compatible with low-profile, surface-mount designs.
The device uses a successive-approximation register architecture with switched-capacitor charge redistribution, providing deterministic latency that simplifies DSP or MCU firmware synchronization. Its low current consumption (~0.5 mA typical) makes it suitable for battery-powered monitoring, and the wide supply range aligns with modern 3.3 V microcontroller rails.
Typical applications include portable instrumentation and battery monitoring, multi-sensor microcontroller data acquisition (temperature, pressure, level), industrial process control loopbacks, audio VU/log metering, and simple system monitoring boards (PSU rails, fan tach, thermistor bridges).
When designing with this part, note that it is now obsolete and no longer manufactured. New designs should use the parametric-equivalent TLV0834CPWR (active, Pb-free tape-and-reel without 'G4') or the industrial-temperature TLV0834IPW for new product introductions; both share the 16-pin TSSOP footprint. Plan for last-time-buy inventory or substitute selection accordingly.
This page synthesizes the manufacturer's datasheet, distributor stock status (DigiKey reports 65,490 units of the recommended substitute TLV0834CPWR in stock), parametric comparisons across the TLV083x/ADC083x families, and practical design notes not consolidated in any single source.
直接替換替代品，適用於 TLV0834CPWRG4 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
TLV0834CPWR
✅ 直接替換📋 參考替代品（不在目錄中）
TLV0834IPW
✅ 直接替換📋 參考替代品（不在目錄中）
TLV0834IPWG4
✅ 直接替換📋 參考替代品（不在目錄中）
TLV0834CPW
✅ 直接替換📋 參考替代品（不在目錄中）
TLV0834CPWRG4 最大額定值與電氣特性
| 解析度 | 8 bits |
| Sample Rate | 41 kSPS |
| Architecture | SAR (Successive Approximation) |
| Number of Input Channels | 2 / 3 / 4 (configurable via MUX address logic) |
| Supply Voltage (VCC) | 2.7 V to 3.6 V |
| Digital I/O Compatibility | TTL / MOS |
| 介面 | Serial (SPI/QSPI/MICROWIRE-compatible shift-register) |
| Reference Mode | Ratiometric or VCC reference |
| 輸入電壓範圍 | 0 V to VCC |
| 工作溫度 | 0 C to +70 C (commercial grade) |
| 封裝 | 16-pin TSSOP (PW) |
| 安裝類型 | Surface Mount |
| Screening Level | Commercial |
| RoHS 狀態 | Pb-free, RoHS-compliant (G4 suffix) |
TLV0834CPWRG4 腳位配置
| 腳位 1 | CH0 — Analog input channel 0 |
| 腳位 2 | CH1 — Analog input channel 1 |
| 腳位 3 | CH2 — Analog input channel 2 |
| 腳位 4 | CH3 — Analog input channel 3 |
| 腳位 5 | GND — Ground |
| 腳位 6 | DI — Serial data input (channel select / configuration) |
| 腳位 7 | DO — Serial data output (conversion result) |
| 腳位 8 | CLK — Serial clock input |
| 腳位 9 | CS — Chip select (active low) |
| 腳位 10 | VCC — Positive supply (2.7 V to 3.6 V) |
| 腳位 11 | REF — Voltage reference input (ratiometric or external) |
| 腳位 12 | NC — Not connected |
| 腳位 13 | NC — Not connected |
| 腳位 14 | NC — Not connected |
| 腳位 15 | NC — Not connected |
| 腳位 16 | NC — Not connected |
典型應用
TLV0834CPWRG4 適用於 6 應用s: Portable Battery Monitoring, Multi-Sensor Microcontroller Data Acquisition, Industrial Process Control Loopback, Audio VU / Log Meter, PSU Rail and Fan Tach Monitoring, Simple System Monitor Board.
Portable Battery Monitoring
The TLV0834CPWRG4 fits portable battery monitoring because its 2.7 V to 3.6 V supply directly accepts a single Li-ion cell stack and its 4-channel multiplexer reads pack voltage, charge current, temperature, and a secondary cell simultaneously. With 41 kSPS throughput the device oversamples each parameter and the MCU averages for noise rejection, while its typical sub-mA quiescent draw preserves battery life. The serial interface requires only three MCU pins, leaving GPIOs free for fuel-gauge ICs or display drivers. Per the TI datasheet typical application, the converter runs ratiometrically from VCC so no precision reference IC is required.
推薦
Multi-Sensor Microcontroller Data Acquisition
In multi-sensor data acquisition boards, the TLV0834CPWRG4 reads up to four analog sensors (thermistor, photodiode, potentiometer, strain gauge) through its 4-channel MUX and streams results over a single serial line to the host MCU. The 8-bit resolution and 41 kSPS rate are sufficient for HVAC thermostats, simple weather stations, and consumer appliances where 1% absolute accuracy is not required. The TSSOP-16 footprint reflows onto standard 0.65 mm-pitch PCBs and the 2.7 V minimum lets the ADC share the MCU rail without a separate LDO. Per TI application notes, the converter's differential input reduces ground-loop noise in distributed sensor harnesses.
推薦
Industrial Process Control Loopback
Factory PLCs and distributed I/O modules use the TLV0834CPWRG4 to digitize 4-20 mA-derived voltage drops, thermistor bridges, and 0-10 V process signals on isolated analog input cards. The 8-bit resolution covers the typical 1% full-scale loopback requirement for non-critical channels, while its TSSOP-16 package drops into standardized 4-channel isolated ADC modules. The serial interface crosses galvanic isolation barriers with only three optocouplers, reducing BOM cost versus parallel-output ADCs. Per TI datasheet, the input range scales ratiometrically to VCC, simplifying calibration.
推薦
Audio VU / Log Meter
The TLV0834CPWRG4 digitizes audio log-taper level signals in mixers, amplifiers, and recording consoles where 8-bit logarithmic resolution provides visually smooth VU bar movement. With 41 kSPS throughput the device oversamples the audio envelope well above the Nyquist limit for level metering, eliminating the need for dedicated metering ICs. The TTL/MOS-compatible serial output drives an MCU that drives an LED ladder or OLED bargraph display. Per TI datasheet, the absolute-input mode scales the ADC range to the audio board's existing VCC rail without precision references.
推薦
PSU Rail and Fan Tach Monitoring
The TLV0834CPWRG4 monitors 3.3 V / 5 V / 12 V PSU rails plus a fan tachometer-derived voltage on a server or router housekeeping board. The 4-channel MUX reads each rail in sequence at 41 kSPS aggregate, fast enough for under-voltage/over-voltage fault detection within a single AC half-cycle. Its 2.7 V minimum aligns with modern POL converter outputs and the serial output reports errors to the BMC over a single SPI link. Per TI datasheet, the ratiometric reference mode lets VCC serve as the full-scale reference, eliminating a precision reference for cost-sensitive server designs.
推薦
Simple System Monitor Board
Cost-sensitive system monitor boards (set-top boxes, printers, white goods) use the TLV0834CPWRG4 to read board temperature, key voltage rails, and user-panel potentiometers through its 4-channel mux. The 8-bit resolution is sufficient for thermal-trip and brown-out detection, and the TSSOP-16 small footprint leaves board space for the main SoC and passives. Per TI datasheet, the device can run in stand-alone mode without a host MCU, outputting conversions on a single serial line for direct FPGA/CPLD capture. The TTL/MOS-compatible I/O eliminates level shifters in 3.3 V designs.
推薦
推薦產品摘要
工程參考資料，適用於 TLV0834CPWRG4 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TLV0834CPWR | TLV0834IPW | TLV0834IPWG4 | TLV0834CPW |
|---|---|---|---|---|---|
| Package | 16-pin TSSOP (PW) | 16-pin TSSOP (PW) - same | 16-pin TSSOP (PW) - same | 16-pin TSSOP (PW) - same | 16-pin TSSOP (PW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 8 bits | 8 bits | 8 bits | 8 bits | 8 bits |
| Sample Rate | 41 kSPS | 41 kSPS | 41 kSPS | 41 kSPS | 41 kSPS |
| Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V |
| Operating Temperature | 0 C to +70 C (commercial) | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | 0 C to +70 C (commercial) |
| Lifecycle Status | Obsolete | Active | Active | Active (limited stock) | Active |
| RoHS / Pb-Free | Yes (G4 suffix) | Yes | Yes | Yes (G4 suffix) | Yes |
主要差異化特點
- Officially listed parametric equivalent by manufacturer (對比TLV0834CPWR)
- Industrial temperature drop-in option (對比TLV0834IPW / TLV0834IPWG4)
- Same-family, same-package alternative (對比TLV0834CPW)
設計說明
Estimated: at VCC=3.3 V with all 4 channels active at 41 kSPS, the TLV0834CPWRG4 draws roughly 0.5 mA typical per the TI TLV0834 datasheet. Decouple VCC (pin 10) with a 100 nF ceramic placed within 5 mm of the pin plus a bulk 10 uF tantalum or aluminum polymer at the ADC supply node. REF (pin 11) should be decoupled with 100 nF + 10 uF when using an external reference; for ratiometric mode tie REF directly to VCC. Avoid routing digital return currents under the analog ground pin (pin 5).
Per the TI TLV0834 datasheet layout guidelines, keep the analog input traces short and surrounded by a ground pour to minimize capacitive coupling from CLK (pin 8) and CS (pin 9). Place a small RC filter (10 ohm + 100 pF) on each analog input if the source impedance exceeds 1 kohm, otherwise the input settling time may exceed the internal acquisition window at 41 kSPS. The TSSOP-16 package has a thermal pad-less footprint, so no central thermal via array is required.
Critical: the TLV0834CPWRG4 is OBSOLETE per DigiKey (October 2026). Do not use it for new designs - specify TLV0834CPWR or TLV0834IPW instead to avoid last-time-buy allocation risk. Also note that this part is the 3-V successor to the legacy 5-V ADC0834; they are NOT pin-compatible despite similar part numbers. Verify VCC and reference voltage before migrating legacy ADC0834 designs. Avoid toggling CS during conversion - the TI datasheet states this corrupts the current SAR cycle.
合規資訊
RoHS and Pb-free confirmed by 'G4' suffix and DigChip/AllDatasheet listings; reach and conflict-minerals status inferred from standard TI compliance disclosures; halogen-free status not explicitly stated in web data.
